Patent Publication Number: US-8995374-B2

Title: Method for determining information which enable a mobile station to identify which resources are allocated to the mobile station

Description:
The present invention relates generally to a method and a device for determining information which enable a mobile station to identify which resources of a wireless telecommunication network are allocated to the mobile station. 
     More precisely, the present invention is in the field of the signalling of resources allocated to a mobile station in a wireless telecommunication network. 
     Orthogonal Frequency-Division Multiplexing (OFDM) is based upon the principle of frequency-division multiplexing (FDM) and is implemented as a digital modulation scheme. The bit stream to be transmitted is split into several parallel bit streams, typically dozens to thousands. The available frequency spectrum is divided into several sub-channels, and each low-rate bit stream is transmitted over one sub-channel by modulating a sub-carrier using a standard modulation scheme, for example PSK, QAM, etc. The sub-carrier frequencies are chosen so that the modulated data streams are orthogonal to each other, meaning that cross talk between the sub-channels is eliminated. 
     The primary advantage of OFDM is its ability to cope with severe channel conditions, for example, multipath and narrowband interference, without complex equalization filters. Channel equalization is simplified by using many slowly modulated narrowband signals instead of one rapidly modulated wideband signal. 
     A variation called DFT spread OFDM or SC-FDMA (Single Carrier Frequency-Division Multiple Access) has been developed. In this system, each symbol to be transmitted is spread over a set of transmitted frequencies by a DFT (Discrete Fourier Transform), the resulting signal is sent over a conventional OFDMA transmission system. 
     Actual implementation of coding/decoding is made either in the frequency domain or in the time domain while the implementation in the frequency domain may be preferred. 
     Sometimes, the used subcarriers cannot be allocated in a contiguous sub-band, but need to be separated into several clusters. This leads to Clustered SC-FDMA, which has the advantage of a more flexible subcarrier mapping with respect to localized SC-FDMA, leading to more scheduling gain and better multi-user multiplexing. 
     The present invention aims at providing a telecommunication system wherein all the sub-carriers allocated to a telecommunication device are divided into at least two non contiguous clusters and wherein the signalling of the allocated sub-carriers is reduced. 
     To that end, the present invention concerns a method for determining information which enable a mobile station to identify among a set of resources that can be allocated in a wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station, the allocated resources being divided into plural non contiguous clusters of one resource or of plural contiguous resources, characterised in that the method comprises the steps of:
         allocating resources to the mobile station, the allocated resources dividing the set of resources into subsets of resources,   determining, from the allocated resources, plural ordered parameters, each parameter being equal to a number of contiguous resources in a subset of at least one resource corresponding to the parameter, the at least one resource being not allocated to the mobile station or forming a cluster of one resource or of plural contiguous resources allocated to the mobile station,   calculating, for the first parameter, within the set of possible resource allocations, the number of possibilities of having in the corresponding subset, an amount of resources that is lower than the first parameter,   calculating, for each following parameter, within the set of possible resource allocations, the number of possibilities of having for each subset corresponding to a parameter having a lower rank than said following parameter an amount of resources that is equal to the parameter the subset corresponds to and having in the subset corresponding to said following parameter an amount of resources that is lower than said following parameter,   determining information which enable a mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station by summing all the calculated numbers.       

     The present invention concerns also a device for determining information which enable a mobile station to identify among a set of resources that can be allocated in a wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station, the allocated resources being divided into plural non contiguous clusters of one resource or of plural contiguous resources, characterised in that the device for determining information comprises:
         means for allocating resources to the mobile station, the allocated resources dividing the set of resources into subsets of resources,   means for determining, from the allocated resources, plural ordered parameters, each parameter being equal to a number of contiguous resources in a subset of at least one resource corresponding to the parameter, the at least one resource being not allocated to the mobile station or forming a cluster of one resource or of plural contiguous resources allocated to the mobile station,   means for calculating, for the first parameter, within the set of possible resource allocations, the number of possibilities of having in the corresponding subset, an amount of resources that is lower than the first parameter,   means for calculating, for each following parameter, within the set of possible resource allocations, the number of possibilities of having for each subset corresponding to a parameter having a lower rank than said following parameter an amount of resources that is equal to the parameter the subset corresponds to and having in the subset corresponding to said following parameter an amount of resources that is lower than said following parameter,   means for determining information which enable a mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station by summing all the calculated numbers.       

     Thus, it is possible to allocate non contiguous resources of the wireless telecommunication network to a mobile station with a reduced signalling of the allocated resources. 
     According to a particular feature, at least two non-contiguous clusters of one resource or of plural contiguous resources are allocated to the mobile station, each cluster of one resource or of plural contiguous resources comprising a number of resources which is independent of the number of resources comprised in other allocated cluster or clusters of one resource or of plural contiguous resources, and the number of resources separating two clusters of one resource or of plural contiguous resources is independent of any other resources that may either separate two clusters of one resource or of plural contiguous resources, or be comprised in other allocated clusters of one resource or of plural contiguous resources. 
     Thus, a maximum of flexibility is ensured. 
     According to a particular feature, at least three non-contiguous clusters of one resource or of plural contiguous resources are allocated to the mobile station, each cluster of one resource or of plural contiguous resources comprising the same number of resources which is independent of any other resources that may separate two clusters. 
     Thus, signaling overhead is reduced. 
     According to a particular feature, the first parameter is the number of resources comprised in each cluster of one resource or of plural contiguous resources. 
     According to a particular feature, at least three non-contiguous clusters of one resource or of plural contiguous resources are allocated to the mobile station, each cluster of one resource or of plural contiguous resources comprising a number of resources which is independent of the number of resources comprised in other allocated clusters of one resource or of plural contiguous resources and the numbers of resources separating two clusters are identical. 
     Thus, signaling overhead is reduced. 
     According to a particular feature, the first parameter is the number of resources separating two clusters of one resource or of plural contiguous resources. 
     Thus, the complexity to implement the present invention is reduced. 
     According to a particular feature, the number of clusters of one resource or of plural contiguous resource is predetermined. 
     Thus, the signalling overhead is reduced. 
     According to a particular feature, the base station:
         computes the number of all possible resource allocations with at least a predetermined number of clusters and less than the current number of clusters,   modifies the information which enables the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station by adding the number of all possible resource allocations with at least a predetermined number of clusters and less than the current number of clusters to the information.       

     Thus, the mobile station is able to determine the number of clusters that were allocated to it without prior knowledge on this number of clusters. 
     According to still another aspect, the present invention concerns a method for identifying among a set of resources that can be allocated in a wireless telecommunication network to a mobile station, which resources of the wireless telecommunication network are allocated to the mobile station, the allocated resources being divided into plural non contiguous clusters of one resource or of plural contiguous resources, characterised in that the method comprises the steps executed by the mobile station of:
         receiving information which enable the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station,   determining a number of possibilities of having a subset of at least one resource corresponding to a first parameter, the subset comprising less than a first amount of resources,   determining a number of possibilities of having a subset of at least one resource corresponding to the first parameter, the subset comprising less than the first amount of resources plus one,   selecting the first amount of resources as a first parameter if the number of possibilities of having a subset of at least one resource corresponding to the first parameter, the subset comprising less than the first amount of resources, is lower than or equal to the received information and if the number of possibilities of having a subset corresponding to the first parameter, the subset of at least one resource comprising less than the first amount of resources plus one, is upper than the received information,   modifying the information which enables the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station by subtracting the number of possibilities of having a subset of at least one resource corresponding to the first parameter, the subset comprising an amount of resources inferior to the first parameter, from the information which enables the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station,       

     and as far as all the parameters are not determined,
         determining for the following parameter, within the set of possible resource allocations:
           a first number of possibilities of having for each subset of at least one resource corresponding to a parameter having a lower rank than said following parameter, each subset comprising an amount of resources that is equal to the parameter the subset corresponds to and having a subset of at least one resource corresponding to said following parameter comprising an amount of resources that is lower than a given value,   a second number of possibilities of having for each subset of at least one resource corresponding to a parameter having a lower rank than said following parameter, each subset comprising an amount of resources that is equal to the parameter the subset corresponds to and having a subset of at least one resource corresponding to said following parameter comprising an amount of resources that is lower than a given value plus one,   selecting the given value as following parameter if the first number is lower than or equal to the modified information and if the second number is upper than the modified information,   
           updating the modified information by subtracting the first number from the modified information,   identifying among the set of resources that can be allocated in the wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station according to the parameters when all the parameters are determined.       

     The present invention concerns also a device for identifying among a set of resources that can be allocated in a wireless telecommunication network to a mobile station, which resources of the wireless telecommunication network are allocated to the mobile station, the allocated resources being divided into plural non contiguous clusters of one resource or of plural contiguous resources, characterised in that the device for identifying is included in the mobile station and comprises:
         means for receiving information which enable the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station,   means for determining a number of possibilities of having a subset of at least one resource corresponding to a first parameter, the subset comprising less than a first amount of resources,   means for determining a number of possibilities of having a subset of at least one resource corresponding to the first parameter, the subset comprising less than the first amount of resources plus one,   means for selecting the first amount of resources as a first parameter if the number of possibilities of having a subset of at least one resource corresponding to the first parameter, the subset comprising less than the first amount of resources, is lower than or equal to the received information and if the number of possibilities of having a subset corresponding to the first parameter, the subset of at least one resource comprising less than the first amount of resources plus one, is upper than the received information,   means for modifying the information which enables the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station by subtracting the number of possibilities of having a subset of at least one resource corresponding to the first parameter, the corresponding subset comprising an amount of resources inferior to the first parameter from the information which enables the mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station,   means for determining for the following parameter, within the set of possible resource allocations and as far as all the parameters are not determined:
           a first number of possibilities of having for each subset of at least one resource corresponding to a parameter having a lower rank than said following parameter, each subset comprising an amount of resources that is equal to the parameter the subset corresponds to and having a subset of at least one resource corresponding to said following parameter comprising an amount of resources that is lower than a given value,   a second number of possibilities of having for each subset of at least one resource corresponding to a parameter having a lower rank than said following parameter, each subset comprising an amount of resources that is equal to the parameter the subset corresponds to and having a subset of at least one resource corresponding to said following parameter comprising an amount of resources that is lower than a given value plus one,   means for selecting for the following parameter the given value as following parameter if the first number is lower than or equal to the modified information and if the second number is upper than the modified information, as far as all the parameters are not determined,   
           means for updating the modified information by subtracting the first number from the modified information as far as all the parameters are not determined,   means for identifying among the set of resources that can be allocated in the wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station according to the parameters when all the parameters are determined.       

     Thus, it is possible to allocate non contiguous resources of the wireless telecommunication network to a mobile station with a limited signalling of the allocated resources. 
     According to a particular feature, the number of allocated clusters is determined by the mobile station by:
         determining the number of resource allocations with at least a minimum predetermined number of clusters and less than a given number of clusters,   determining the number of resource allocations with at least the minimum predetermined number of clusters and less than the given number plus one of clusters,   selecting the given number as the number of clusters if the number of resource allocations with at least the predetermined minimum number of clusters and less than the given number of clusters is lower than or equal to the received information and if the number of resource allocations with at least the minimum predetermined number of clusters and less than the given number plus one of clusters is upper than the received information,   modifying the received information by subtracting the value of number of resource allocations with at least the predetermined minimum number of clusters and less than the given number of clusters from the received information.       

     According to still another aspect, the present invention concerns computer programs which can be directly loadable into a programmable device, comprising instructions or portions of code for implementing the steps of the methods according to the invention, when said computer programs are executed on a programmable device. 
     Since the features and advantages relating to the computer programs are the same as those set out above related to the method and apparatus according to the invention, they will not be repeated here. 
    
    
     
       The characteristics of the invention will emerge more clearly from a reading of the following description of an example embodiment, the said description being produced with reference to the accompanying drawings, among which: 
         FIG. 1  represents a wireless cellular telecommunication network in which the present invention is implemented; 
         FIG. 2  is a diagram representing the architecture of a base station in which the present invention is implemented; 
         FIG. 3  is a diagram representing the architecture of a mobile station in which the present invention is implemented; 
         FIG. 4  illustrates the architecture of the encoder comprised in a mobile station according to a particular embodiment of the invention in frequency domain; 
         FIG. 5  illustrates the architecture of the decoder of a base station having one or several receive antennas according to a particular embodiment of the invention; 
         FIG. 6  represents a first example of three clusters of at least one group of resource blocks allocated to a mobile station and parameters according to the present invention; 
         FIG. 7  discloses a first example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a first mode of realisation of the present invention; 
         FIG. 8  discloses a second example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a second mode of realisation of the present invention; 
         FIG. 9  discloses a third example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a third mode of realisation of the present invention; 
         FIG. 10  represents a second example of three clusters of at least one group of resource blocks allocated to a mobile station and parameters according to the present invention; 
         FIG. 11  discloses a fourth example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a fourth mode of realisation of the present invention; 
         FIG. 12  represents a third example of three clusters of at least one group of resource blocks allocated to a mobile station and parameters according to the present invention; 
         FIG. 13  discloses a first example of an algorithm executed by a mobile station according to the first mode of realisation of the present invention; 
         FIG. 14  discloses a second example of an algorithm executed by a mobile station according to the second mode of realisation of the present invention; 
         FIG. 15  discloses a third example of an algorithm executed by a mobile station according to the third mode of realisation of the present invention; 
         FIG. 16  discloses a fourth example of an algorithm executed by a mobile station according to the fourth mode of realisation of the present invention; 
     
    
    
       FIG. 1  represents a wireless cellular telecommunication network in which the present invention is implemented. 
     The present invention will be described in an example wherein the telecommunication system is a wireless cellular telecommunication system. 
     The present invention is also applicable to wireless or wired telecommunication systems like Local Area Networks. 
     In that case, the base station and mobile station are emitters and/or receivers. 
     In  FIG. 1 , one base station BS of the wireless cellular telecommunication network and a mobile station MS are shown. 
     The present invention is described when the resources of the wireless cellular telecommunication network to be used by the mobile station MS are allocated by a base station BS. 
     The resources of the wireless cellular telecommunication network are the frequency spectrum and/or time slots used by the wireless cellular telecommunication network. The frequency spectrum is, for example, decomposed into groups of resource blocks and each resource block comprises a predetermined number of sub-carriers, for example twelve. 
     It has to be noted here that in a variant a resource block may be composed of a single sub-carrier. 
     The present invention will be disclosed with groups of resource blocks. The present invention is also applicable to resource blocks or resources. 
     The base station BS is a base station of a wireless cellular telecommunication network comprising one or plural base stations. 
     Only one mobile station MS is shown for the sake of clarity but the wireless cellular telecommunication network may have a more important number of mobile stations MS to communicate with the base station BS. 
     The base station BS may be named a node or an access point. 
     The mobile station MS may be a personal computer, a peripheral device like a set top box, or a phone. 
     According to the invention, at least two non contiguous clusters of at least one group of resource blocks are allocated to one mobile station MS. 
     According to the invention, in order to indicate the n allocated clusters of at least one group of resource blocks, at least four and at most 2n parameters are needed. 
     If some supplementary constraints are imposed, like a common size for each cluster of one or plural contiguous groups of resource blocks or like a common spacing between clusters of at least one group of resource blocks, less than 2n independent parameters following a weighted sum constraint are needed as it will be disclosed herein after. 
     Let us denote by Q the number of parameters independent under weighted sum constraint that are necessary to indicate an allocation with n non-contiguous clusters. Let the Q parameters be noted M 0  . . . M 0  . . . M Q-1 . 
     The condition of independence under weighted sum constraint of Q parameters representative of n non-contiguous clusters allocation can be written as: 
                   {               ∑     k   =   0       Q   -   1       ⁢           ⁢       q   k     ⁢     M   k         ≤       N   RBG     +   1                     ∑     k   =   0       Q   -   1       ⁢           ⁢     q   k       =     2   ⁢   n                     
where q k  is a coefficient which is representative of the number of occurrences of the parameter M k  in the allocation. Coefficients q k  are integer and strictly positive.
 
     For example, q k  may be the number of clusters of one or plural contiguous groups of resource blocks if the number of groups of resource blocks is identical for each cluster of one or plural contiguous groups of resource blocks and M k  is the number of groups of resource blocks comprised in each cluster. 
     For example, q k  is the number of clusters minus one if the clusters of one or plural contiguous groups of resource blocks are equally spaced and M k  is the number of at least one group of resource blocks between two clusters of at least one group of resource blocks. 
     For Q parameters (M 0  . . . M Q-1 ) representative of an allocation with n clusters, the parameter M 0  can take values from one to: 
     
       
         
           
             
               
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     Generally, for all k=0 . . . Q−1 we can state that: 
     For any fixed (M 0  . . . M k−1 ), parameter M k  can take values from 1 to: 
     
       
         
           
             
               
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     According to the invention, the base station BS which handles the mobile station MS or any core network device of the wireless cellular telecommunication network:
         allocates groups of resources blocks to the mobile station, the allocated groups of resources blocks dividing the set of resources into subsets of groups of resources blocks,   determines, from the allocated groups of resources blocks, plural ordered parameters, each parameter being equal to a number of contiguous groups of resources blocks in a subset of at least one group of resources blocks corresponding to the parameter, the at least one group of resources blocks being not allocated to the mobile station or forming a cluster of one group of resources blocks or of plural contiguous groups of resources blocks allocated to the mobile station,   calculates, for the first parameter, within the set of possible groups of resources blocks allocations, the number of possibilities of having in the corresponding subset, an amount of groups of resources blocks that is lower than the first parameter,   calculates, for each following parameter, within the set of possible groups of resources blocks allocations, the number of possibilities of having for each subset corresponding to a parameter having a lower rank than said following parameter, an amount of groups of resources blocks that is equal to the parameter the subset corresponds to and having in the subset corresponding to said following parameter an amount of groups of resources blocks that is lower than said following parameter,   determines information which enable a mobile station to identify which groups of resources blocks of the wireless telecommunication network are allocated to the mobile station by summing all the calculated numbers.       

     The mobile station:
         receives information which enable the mobile station to identify which groups of resources blocks of the wireless telecommunication network are allocated to the mobile station,   determines a number of possibilities of having a subset of at least one group of resources blocks corresponding to a first parameter, the subset comprising less than a first amount of groups of resources blocks,   determines a number of possibilities of having a subset of at least one group of resources blocks corresponding to the first parameter, the subset comprising less than the first amount of groups of resources blocks plus one,   selects the first amount of groups of resources blocks as a first parameter if the number of possibilities of having a subset of at least one group of resources blocks corresponding to the first parameter, the subset comprising less than the first amount of groups of resources blocks, is lower than or equal to the received information and if the number of possibilities of having a subset corresponding to the first parameter, the subset of at least one group of resources blocks comprising less than the first amount of groups of resources blocks plus one, is upper than the received information,   modifies the information which enables the mobile station to identify which groups of resources blocks of the wireless telecommunication network are allocated to the mobile station by subtracting the number of possibilities of having a subset of at least one group of resources blocks corresponding to the first parameter, the subset comprising an amount of groups of resource blocks inferior to the first parameter, from the information which enables the mobile station to identify which groups of resources blocks of the wireless telecommunication network are allocated to the mobile station,       

     and as far as all the parameters are not determined,
         determines for the following parameter, within the set of possible groups of resources blocks allocations:
           a first number of possibilities of having for each subset of at least one group of resources blocks corresponding to a parameter having a lower rank than said following parameter, each subset comprising an amount of groups of resources blocks that is equal to the parameter the subset corresponds to and having a subset of at least one group of resources blocks corresponding to said following parameter comprising an amount of groups of resources blocks that is lower than a given value,   a second number of possibilities of having for each subset of at least one group of resources blocks corresponding to a parameter having a lower rank than said following parameter, each subset comprising an amount of groups of resources blocks that is equal to the parameter the subset corresponds to and having a subset of at least one group of resources blocks corresponding to said following parameter comprising an amount of groups of resources blocks that is lower than a given value plus one,   selects the given value as following parameter if the first number is lower than or equal to the modified information and if the second number is upper than the modified information,   
           updates the modified information by subtracting the first number from the modified information,   identifies among the set of groups of resources blocks that can be allocated in the wireless telecommunication network to the mobile station, which groups of resources blocks of the wireless telecommunication network are allocated to the mobile station according to the parameters when all the parameters are determined.       

       FIG. 2  is a diagram representing the architecture of a base station in which the present invention is implemented. 
     The base station BS has, for example, an architecture based on components connected together by a bus  201  and a processor  200  controlled by the programs as disclosed in  FIGS. 7 ,  8 ,  9  and  11 . 
     It has to be noted here that the base station BS may have an architecture based on dedicated integrated circuits. 
     The bus  201  links the processor  200  to a read only memory ROM  202 , a random access memory RAM  203 , a wireless interface  205  and a network interface  206 . 
     The memory  203  contains registers intended to receive variables and the instructions of the program related to the algorithms as disclosed in  FIGS. 7 ,  8 ,  9  and  11 . 
     The processor  200  controls the operation of the network interface  206  and of the wireless interface  205 . 
     The read only memory  202  contains instructions of the program related to the algorithms as disclosed in  FIGS. 7 ,  8 ,  9  and  11 , which are transferred, when the base station BS is powered on, to the random access memory  203 . 
     The base station BS may be connected to a telecommunication network through the network interface  206 . For example, the network interface  206  is a DSL (Digital Subscriber Line) modem, or an ISDN (Integrated Services Digital Network) interface, etc. 
     The wireless interface  205  comprises means for transferring information representative of the sub-carriers allocated to the mobile station MS. 
     The wireless interface  205  comprises a decoder as disclosed in  FIG. 5 . The wireless interface  205  may comprise an encoder as disclosed in  FIG. 4 . 
       FIG. 3  is a diagram representing the architecture of a mobile station in which the present invention is implemented. 
     The mobile station MS has, for example, an architecture based on components connected together by a bus  301  and a processor  300  controlled by the programs as disclosed in  FIGS. 13 ,  14 ,  15  and  16 . 
     It has to be noted here that the mobile station MS may have an architecture based on dedicated integrated circuits. 
     The bus  301  links the processor  300  to a read only memory ROM  302 , a random access memory RAM  303  and a wireless interface  305 . 
     The memory  303  contains registers intended to receive variables and the instructions of the program related to the algorithms as disclosed in  FIGS. 13 ,  14 ,  15  and  16 . 
     The processor  300  controls the operation of the wireless interface  305 . 
     The read only memory  302  contains instructions of the program related to the algorithms as disclosed in  FIGS. 13 ,  14 ,  15  and  16 , which are transferred, when the mobile station MS is powered on, to the random access memory  303 . 
     The wireless interface  305  comprises means for mapping data on sub-carriers comprised in the clusters of sub-carriers allocated to the mobile station MS. 
     The wireless interface  305  comprises an encoder as disclosed in  FIG. 4 . The wireless interface  305  may comprise a decoder as disclosed in  FIG. 5 . 
       FIG. 4  illustrates the architecture of the encoder according to a particular embodiment of the invention in frequency domain. 
     Data to be transmitted are coded and organized as symbols by the coding and modulation module  40  giving a set of symbols x n . Then the signal is spread in the frequency domain by the DFT (Discrete Fourier Transform) module  41 . In a variant, the DFT module is replaced by a Fast Fourier Transform module or any other processing module. 
     In case of OFDMA, DFT module may not be needed. 
     The symbols spread in the frequency domain are mapped on sub-carriers comprised in the allocated frequency band by a frequency mapping module  42  which maps data to be transferred on sub-carriers. The frequency mapping module  42  comprises zero insertion and/or frequency shaping capabilities. 
     The frequency mapping module  42  maps symbols on the frequency band allocated to the mobile station MS. As the sub-carriers are not allocated in a contiguous sub-band, the frequency band is separated into several clusters. The frequency mapping module  42  maps symbols on the different clusters of the frequency band allocated to the mobile station MS. 
     In  FIG. 4 , the frequency mapping module  42  shows an example wherein T=T 0 +T 1 +T 2  symbols are mapped on T sub-carriers of three clusters of at least one group of resource blocks. A first cluster comprises the sub-carriers noted n 0  to n 0 +T 0 −1, a second cluster comprises the sub-carriers noted n 1  to n 1 +T 1 −1 and a third cluster comprises the sub-carriers noted n 2  to n 2 +T 2 −1. 
     The symbols outputted by the frequency mapping module  42  are transformed back in the time domain by the IDFT (Inverse Discrete Fourier Transform) module  43 . 
     An optional cyclic prefix insertion module  44  can be applied before transmission through the antenna of the mobile station MS. 
       FIG. 5  illustrates the architecture of the decoder of a device according to a particular embodiment of the invention. 
     At least one signal  57  is received from at least one receive antenna. The synchronization module  50  synchronizes the received signal  57 . 
     The optional cyclic prefix removal module  51  removes the cyclic prefix if used, to the synchronized signal. 
     The DFT module  52  executes a DFT on the synchronized signal on which the cyclic prefix has been removed or not. In a variant, the DFT module is replaced by a Fast Fourier Transform module or any other processing module. 
     A channel estimation module  54  will work on the signals provided by the DFT module  52 . The output of the channel estimation module  54  commands an equalization module  53 . The output of the equalization module  53  is processed by an inverse DFT module  55  before a classical channel decoding module  56  which treats the resulting signal. 
     In case of OFDMA, IDFT module  55  may not be needed. In other variants, it may be replaced with other processing modules. 
     The demodulating and decoding module  56  demodulates and decodes the symbols into data. 
       FIG. 6  represents a first example of three clusters of at least one group of resource blocks allocated to a mobile station and parameters according to the present invention. 
     In the example of  FIG. 6 , three non contiguous clusters of one or plural contiguous groups of resource blocks are allocated to one mobile station MS. 
       FIG. 6  discloses fourteen groups of resource blocks. The first group of resource blocks which is hachured in  FIG. 6 , is a dummy one. Only N RBG  equals thirteen groups of resource blocks, numbered here from one to thirteen, physically exist. Other conventions of smaller or larger numbering may exist. 
     The groups of resource blocks are ordered and have an index varying from  1  to  13 . The groups of resource blocks are the ones of the set of resources of the wireless cellular telecommunication network which may be allocated to the mobile station MS. 
     The present invention intends to define information which enable a receiver like a mobile station MS to identify which groups of resource blocks are allocated to the mobile station, for example for uplink transmission. 
     In the example of  FIG. 6 , six parameters noted M 0  to M 5  are needed to represent resource allocation configuration of the mobile station MS. 
     The parameter M 0  represents the number plus one of physically existing groups of resource blocks which are not allocated to the mobile station MS and which have an index lower than the index of the first group of resource blocks of the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 6 , M 0  is equal to one as there is a dummy group of resource blocks. The dummy group of resource blocks is virtual and considered as not allocated to the mobile station MS. Then, the first group of resource blocks which physically exists and having the lowest index within the set of groups of resource blocks is the first group of resource blocks of the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. The subset of at least one group of resource blocks which is associated to the parameter M 0  comprises the dummy group of resource blocks. 
     The parameter M 1  represents the number of groups of resource blocks which are allocated to the mobile station MS and which belong to the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 6 , M 1  is equal to two. The subset of at least one group of resource blocks which is associated to the parameter M 1  comprises the groups of resource blocks having the indexes  1  and  2 . 
     The parameter M 2  represents the number of groups of resource blocks not allocated to the mobile station MS which are between the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS and the second cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 6 , M 2  is equal to three. The subset of at least one group of resource blocks which is associated to the parameter M 2  comprises the groups of resource blocks having the indexes  3 ,  4  and  5 . 
     The parameter M 3  represents the number of groups of resource blocks which are allocated to the mobile station MS and which belong to the second cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 6 , M 3  is equal to four. The subset of at least one group of resource blocks which is associated to the parameter M 3  comprises the groups of resource blocks having the indexes  6 ,  7 ,  8  and  9 . 
     The parameter M 4  represents the number of groups of resource blocks not allocated to the mobile station MS which are between the second cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS and the third cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 6 , M 4  is equal to one. The subset of at least one group of resource blocks which is associated to the parameter M 4  comprises the group of resource blocks having the index  10 . 
     The parameter M 5  represents the number of groups of resource blocks which are allocated to the mobile station MS and which belong to the third cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 6 , M 5  is equal to one. The subset of at least one group of resource blocks which is associated to the parameter M 5  comprises the group of resource blocks having the index  11 . 
       FIG. 7  discloses a first example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a first mode of realisation of the present invention. 
     In the first mode of realisation, the number n of clusters of at least one group of resource blocks is known by the mobile station MS. 
     According to the first example, clusters of at least one group of resource blocks can take any size with any spacing, Q=2n and q k =1 for any k=0 . . . 2n−1. 
     M 0  . . . . M 2n-1  parameters represent the n different sizes of allocated clusters of least one group of resource blocks and the n different gaps between clusters of at least one group of resource blocks. They can be ordered according to any predetermined common rule shared by the base station BS and the mobile stations MS. 
     The weighted sum constraint becomes: 
     
       
         
           
             
               
                 ∑ 
                 
                   k 
                   = 
                   0 
                 
                 
                   
                     2 
                     ⁢ 
                     n 
                   
                   - 
                   1 
                 
               
               ⁢ 
               
                   
               
               ⁢ 
               
                 M 
                 k 
               
             
             ≤ 
             
               
                 N 
                 RBG 
               
               + 
               1. 
             
           
         
       
     
     There can be at most n max =(N RBG +1)/2 clusters of at least one group of resource blocks. 
     The parameter M 0  can take values from 1 to N RBG −2n+2. With a fixed M 0 , there are C(N RBG +1−M 0 ,2n−1) possible allocations where C(x,y) is equal to C x   y  which is the number of possible combinations of x elements among y elements. 
     For any fixed parameter M 0 , the parameter M 1  can take values from 1 to N RBG −M 0 −2n+3. 
     With a fixed couple of parameters (M 0 ,M 1 ), there are C(N RBG +1−M 0 −M 1 ,2n−2) possible allocations. 
     For any fixed (M 0 ,M 1 ), parameter M 2  can take values from 1 to N RBG −M 0 −M 1 −2n+4. With a fixed (M 0 , M 1 , M 2 ), there are C(N RBG +1−M 0 −M 1 −M 2 ,2n−3) possible allocations. 
     For any fixed (M 0 , . . . M k−1 ), parameter M k  can take values from 1 to N RBG − 
     
       
         
           
             
               
                 ∑ 
                 
                   p 
                   = 
                   0 
                 
                 
                   k 
                   - 
                   1 
                 
               
               ⁢ 
               
                   
               
               ⁢ 
               
                 M 
                 p 
               
             
             - 
             
               2 
               ⁢ 
               n 
             
             + 
             k 
             + 
             2. 
           
         
       
     
     With a fixed (M 0 , M 1 , . . . , M k ), there are 
             C   (         N   RBG     +   1   -       ∑     p   =   0     k     ⁢           ⁢     M   p         ,       2   ⁢   n     -   k   -   1       )         
possible allocations.
 
     For example, the present algorithm will be described when it is executed by the processor  200  of the base station BS. 
     It has to be noted here that in a variant, instead of being executed by the base station BS, the present algorithm is executed by a core network device not shown in  FIG. 1  of the wireless cellular telecommunication device for plural base stations BS. 
     The present algorithm is executed each time clusters of sub-carriers are allocated to a mobile station MS handled by the base station BS. 
     At step S 700 , the processor  200  allocates groups of resource blocks to the mobile station MS. The allocated groups of resource blocks are allocated for example according to channel conditions and/or according to required quality of service. The allocated groups of resource blocks are divided into n clusters of one or plural contiguous groups of resource blocks. 
     For example, the allocated groups of resource blocks are the ones disclosed in  FIG. 6 . 
     At next step S 701 , the processor  200  determines 2n parameters from the allocated groups of resource blocks. 
     M 0  is equal to one, M 1  is equal to two, M 2  is equal to three, M 3  is equal to four, M 4  is equal to one and M 5  is equal to one. 
     At next step S 702 , the processor  200  calculates a sum S 0 (M 0 ) according to the following formula: 
     
       
         
           
             
               
                 
                   S 
                   0 
                 
                 ⁡ 
                 
                   ( 
                   
                     M 
                     0 
                   
                   ) 
                 
               
               = 
               
                 
                   
                     ∑ 
                     
                       
                         m 
                         0 
                       
                       = 
                       1 
                     
                     
                       
                         M 
                         0 
                       
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     
                       
                         C 
                         ⁡ 
                         
                           ( 
                           
                             
                               
                                 N 
                                 RBG 
                               
                               + 
                               1 
                               - 
                               
                                 m 
                                 0 
                               
                             
                             , 
                             
                               
                                 2 
                                 ⁢ 
                                 n 
                               
                               - 
                               1 
                             
                           
                           ) 
                         
                       
                       . 
                       
                         
 
                       
                       ⁢ 
                       If 
                     
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       M 
                       0 
                     
                   
                 
                 = 
                 1 
               
             
             , 
             
               
 
             
             ⁢ 
             
               
                 
                   S 
                   0 
                 
                 ⁡ 
                 
                   ( 
                   
                     M 
                     0 
                   
                   ) 
                 
               
               = 
               0. 
             
           
         
       
     
     According to the example of  FIG. 6 , S 0 (M 0 )=0. 
     The sum S 0 (M 0 ) is the number of possibilities of having in the subset corresponding to M 0 , an amount of groups of resource blocks m 0  that is lower than the first parameter M 0 . 
     At next step S 703 , the processor  200  sets the value of the information RIV n  enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value S 0 (M 0 ). 
     At next step S 704 , the processor  200  sets the value of the variable k to one. 
     At next step S 705 , the processor  200  calculates a sum S k (M 0 , . . . , M k ) according to the following formula: 
     
       
         
           
             
               
                 S 
                 k 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   , 
                   … 
                   ⁢ 
                   
                       
                   
                   , 
                   
                     M 
                     k 
                   
                 
                 ) 
               
             
             = 
             
               
                 ∑ 
                 
                   
                     m 
                     k 
                   
                   = 
                   1 
                 
                 
                   
                     M 
                     k 
                   
                   - 
                   1 
                 
               
               ⁢ 
               
                   
               
               ⁢ 
               
                 C 
                 ( 
                 
                   
                     
                       N 
                       RBG 
                     
                     + 
                     1 
                     - 
                     
                       
                         ∑ 
                         
                           p 
                           = 
                           0 
                         
                         
                           k 
                           - 
                           1 
                         
                       
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       
                         M 
                         p 
                       
                     
                     - 
                     
                       m 
                       k 
                     
                   
                   , 
                   
                     
                       2 
                       ⁢ 
                       n 
                     
                     - 
                     1 
                     - 
                     k 
                   
                 
                 ) 
               
             
           
         
       
       
         
           
             ( 
             
               
                 and 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   
                     S 
                     k 
                   
                   ⁡ 
                   
                     ( 
                     
                       
                         M 
                         0 
                       
                       , 
                       … 
                       ⁢ 
                       
                           
                       
                       , 
                       
                         M 
                         k 
                       
                     
                     ) 
                   
                 
               
               = 
               0 
             
           
         
       
     
     The sum S k (M 0 , . . . , M k ) is the total number of possible resource allocations with the k subsets of groups of resource blocks comprising respectively an amount of groups of resource blocks of exactly M 0 , . . . M k−1 , and with a (k+1)-th subset of groups of resource blocks comprising an amount of resources m k  inferior to the value of the parameter M k . 
     For example, for k=1 and respectively 2, the following sums are computed: 
     
       
         
           
             
               
                 S 
                 1 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   , 
                   
                     M 
                     1 
                   
                 
                 ) 
               
             
             = 
             
               
                 ∑ 
                 
                   
                     m 
                     1 
                   
                   = 
                   1 
                 
                 
                   
                     M 
                     1 
                   
                   - 
                   1 
                 
               
               ⁢ 
               
                   
               
               ⁢ 
               
                 C 
                 ⁡ 
                 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                       - 
                       
                         M 
                         0 
                       
                       - 
                       
                         m 
                         1 
                       
                     
                     , 
                     
                       
                         2 
                         ⁢ 
                         n 
                       
                       - 
                       2 
                     
                   
                   ) 
                 
               
             
           
         
       
       
         
           
             and 
             ⁢ 
             
                 
             
             ⁢ 
             if 
           
         
       
       
         
           
             
               
                 M 
                 1 
               
               = 
               1 
             
             , 
             
               
 
             
             ⁢ 
             
               
                 
                   S 
                   1 
                 
                 ⁡ 
                 
                   ( 
                   
                     
                       M 
                       0 
                     
                     , 
                     
                       M 
                       1 
                     
                   
                   ) 
                 
               
               = 
               0 
             
             , 
             
               
 
             
             ⁢ 
             
               
                 
                   S 
                   2 
                 
                 ⁡ 
                 
                   ( 
                   
                     
                       M 
                       0 
                     
                     , 
                     
                       M 
                       1 
                     
                     , 
                     
                       M 
                       2 
                     
                   
                   ) 
                 
               
               = 
               
                 
                   ∑ 
                   
                     
                       m 
                       2 
                     
                     = 
                     1 
                   
                   
                     
                       M 
                       2 
                     
                     - 
                     1 
                   
                 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   C 
                   ⁡ 
                   
                     ( 
                     
                       
                         
                           N 
                           RBG 
                         
                         + 
                         1 
                         - 
                         
                           M 
                           0 
                         
                         - 
                         
                           M 
                           1 
                         
                         - 
                         
                           m 
                           2 
                         
                       
                       , 
                       
                         
                           2 
                           ⁢ 
                           n 
                         
                         - 
                         3 
                       
                     
                     ) 
                   
                 
               
             
           
         
       
       
         
           
             and 
             ⁢ 
             
                 
             
             ⁢ 
             if 
           
         
       
       
         
           
             
               
                 M 
                 2 
               
               = 
               1 
             
             , 
             
               
 
             
             ⁢ 
             
               
                 
                   S 
                   2 
                 
                 ⁡ 
                 
                   ( 
                   
                     
                       M 
                       0 
                     
                     , 
                     
                       M 
                       1 
                     
                     , 
                     
                       M 
                       2 
                     
                   
                   ) 
                 
               
               = 
               0. 
             
           
         
       
     
     In other words, for each value of k, with k=1 . . . 2n−1, the processor  200  calculates, within the set of possible resource allocations, the number of possibilities of having for each subset corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k  an amount of groups of resources blocks that is equal to the parameter M 0  to M k−1  the subset corresponds to and having in the subset corresponding to the parameter M k  an amount of groups of resources blocks that is lower than the parameter M k . 
     At next step S 706 , the processor  200  sets the value of the information RIV n  enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value RIV n +S k (M 0 , . . . , M k ). 
     At next step S 707 , the processor  200  checks if k is equal to 2n−1. If k is equal to 2n−1, the processor  200  moves to step S 709 . Otherwise, the processor  200  moves to step S 708 , increments the variable k by one and returns to step S 705 . 
     At step S 709 , the processor  200  commands the transfer of the information RIV n  enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS. 
     According to the example of  FIG. 6 : 
     S 0 (M 0 )=0, 
     S 1 (M 0 ,M 1 )=495, 
     S 2 (M 0 ,M 1 ,M 2 )=204, 
     S 3 (M 0 ,M 1 ,M 2 ,M 3 )=46, 
     S 4 (M 0 ,M 1 ,M 2 ,M 3 ,M 4 )=0, 
     and S 5 (M 0 ,M 1 ,M 2 ,M 3 ,M 4 ,M 5 )=0. 
     RIV n  is equal to 745. 
       FIG. 8  discloses a second example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a second mode of realisation of the present invention. 
     In the second mode of realisation, the number n of clusters of at least one group of resource blocks may vary from n min  to n max , n min  being known by the mobile station MS. n min  is different from n max  and n min  is upper than one. n max  is equal to (N RBG +1)/2). 
     For example, the present algorithm will be described when it is executed by the processor  200  of the base station BS. 
     It has to be noted here that in a variant, instead of being executed by the base station BS, the present algorithm is executed by a core network device not shown in  FIG. 1  of the wireless cellular telecommunication device for plural base stations BS. 
     The present algorithm is executed each time clusters of sub-carriers are allocated to a mobile station MS handled by the base station BS. 
     At step S 800 , the processor  200  allocates groups of resource blocks to the mobile station MS. The allocated groups of resource blocks are allocated for example according to channel conditions and/or according to required quality of service. The allocated groups of resource blocks are divided into n clusters of at least one group of resource blocks. 
     For example, the allocated groups of resource blocks are the ones disclosed in  FIG. 6 . 
     At next step S 801 , the processor  200  determines 2n parameters from the allocated groups of resource blocks. 
     M 0  is equal to one, M 1  is equal to two, M 2  is equal to three, M 3  is equal to four, M 4  is equal to one and M 5  is equal to one, n min  is equal to two, n max  is equal to seven and n is equal to three. 
     At next step S 802 , the processor  200  calculates the number of all possible resource allocations containing n′ clusters out of N RBG  groups of resource blocks, wherein n′ varies from n min  to n minus 1: 
     
       
         
           
             
               ∑ 
               
                 
                   n 
                   ′ 
                 
                 = 
                 
                   n 
                   min 
                 
               
               
                 n 
                 - 
                 1 
               
             
             ⁢ 
             
                 
             
             ⁢ 
             
               
                 C 
                 ⁡ 
                 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                     
                     , 
                     
                       2 
                       ⁢ 
                       
                         n 
                         ′ 
                       
                     
                   
                   ) 
                 
               
               . 
             
           
         
       
     
     At next step S 803  the processor  200  calculates a sum S 0 (M 0 ) according to the following formula: 
     
       
         
           
             
               
                 
                   S 
                   0 
                 
                 ⁡ 
                 
                   ( 
                   
                     M 
                     0 
                   
                   ) 
                 
               
               = 
               
                 
                   
                     ∑ 
                     
                       
                         m 
                         0 
                       
                       = 
                       1 
                     
                     
                       
                         M 
                         0 
                       
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     
                       
                         C 
                         ⁡ 
                         
                           ( 
                           
                             
                               
                                 N 
                                 RBG 
                               
                               + 
                               1 
                               - 
                               
                                 m 
                                 0 
                               
                             
                             , 
                             
                               
                                 2 
                                 ⁢ 
                                 n 
                               
                               - 
                               1 
                             
                           
                           ) 
                         
                       
                       . 
                       
                         
 
                       
                       ⁢ 
                       If 
                     
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       M 
                       0 
                     
                   
                 
                 = 
                 1 
               
             
             , 
             
               
 
             
             ⁢ 
             
               
                 
                   S 
                   0 
                 
                 ⁡ 
                 
                   ( 
                   
                     M 
                     0 
                   
                   ) 
                 
               
               = 
               0. 
             
           
         
       
     
     According to the example of  FIG. 6 , S 0 (M 0 )=0. 
     The sum S 0 (M 0 ) is the number of possibilities of having in subset corresponding to M 0 , an amount of groups of resource blocks m 0  that is lower than the first parameter M 0 . 
     At next step S 804 , the processor  200  sets the value of the information RIV n  enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value S 0 (M 0 ). 
     At next step S 805 , the processor  200  sets the variable k to one value. 
     At next step S 806 , the processor  200  calculates a sum S k (M 0 , . . . , M k ) according to the following formula: 
     
       
         
           
             
               
                 S 
                 k 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   , 
                   … 
                   ⁢ 
                   
                       
                   
                   , 
                   
                     M 
                     k 
                   
                 
                 ) 
               
             
             = 
             
               
                 ∑ 
                 
                   
                     m 
                     k 
                   
                   = 
                   1 
                 
                 
                   
                     M 
                     k 
                   
                   - 
                   1 
                 
               
               ⁢ 
               
                 C 
                 ( 
                 
                   
                     
                       N 
                       RGB 
                     
                     + 
                     1 
                     - 
                     
                       
                         ∑ 
                         
                           p 
                           = 
                           0 
                         
                         
                           k 
                           - 
                           1 
                         
                       
                       ⁢ 
                       
                         M 
                         p 
                       
                     
                     - 
                     
                       m 
                       k 
                     
                   
                   , 
                   
                     
                       2 
                       ⁢ 
                       n 
                     
                     - 
                     1 
                     - 
                     k 
                   
                 
                 ) 
               
             
           
         
       
       
         
           
             
               ( 
               
                 
                   and 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     
                       S 
                       k 
                     
                     ⁡ 
                     
                       ( 
                       
                         
                           M 
                           0 
                         
                         , 
                         … 
                         ⁢ 
                         
                             
                         
                         , 
                         
                           M 
                           
                             k 
                             ⁢ 
                             
                                 
                             
                           
                         
                       
                       ) 
                     
                   
                 
                 = 
                 
                   
                     0 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     if 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       M 
                       k 
                     
                   
                   = 
                   1 
                 
               
               ) 
             
             . 
           
         
       
     
     The sum S k (M 0 , . . . , M k ) is the total number of possible resource allocations with the k subsets of groups of resource blocks comprising respectively an amount of groups of resource blocks of exactly M 0 , . . . M k−1 , and with a (k+1)-th subset of groups of resource blocks comprising an amount of resources m k  inferior to the value of the parameter M k . 
     In other words, for each value of k, with k=1 . . . 2n−1, the processor  200  calculates, within the set of possible groups of resource blocks allocations, the number of possibilities of having for each subset corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k  an amount of groups of resource blocks that is equal to the corresponding parameter M 0  to M k−1  and having in the subset corresponding to the parameter M k  an amount of groups of resource blocks that is lower than the parameter M k . 
     At next step S 807 , the processor  200  sets the value of the information RIV′ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value RIV′+S k (M 0 , . . . , M k ). 
     At next step S 808 , the processor  200  checks if k is equal to 2n−1. If k is equal to 2n−1, the processor  200  moves to step S 810 . Otherwise, the processor  200  moves to step S 809 , increments the variable k by one and returns to step S 806 . 
     At step S 810 , the processor  200  calculates the information RIV′ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS according to the following formula: 
     
       
         
           
             
               
                 RIV 
                 ′ 
               
               ⁢ 
               
                 M 
                 0 
               
               ⁢ 
               
                   
               
               ⁢ 
               … 
               ⁢ 
               
                   
               
               ⁢ 
               
                 M 
                 
                   
                     2 
                     ⁢ 
                     n 
                   
                   - 
                   1 
                 
               
             
             = 
             
               
                 
                   ∑ 
                   
                     
                       n 
                       ′ 
                     
                     = 
                     
                       n 
                       min 
                     
                   
                   
                     n 
                     - 
                     1 
                   
                 
                 ⁢ 
                 
                   C 
                   ( 
                   
                     
                       
                         N 
                         RGB 
                       
                       + 
                       1 
                     
                     , 
                     
                       2 
                       ⁢ 
                       
                         n 
                         ′ 
                       
                     
                   
                   ) 
                 
               
               + 
               
                 
                   RIV 
                   ′ 
                 
                 ⁢ 
                 
                   M 
                   0 
                 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 … 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   M 
                   
                     
                       2 
                       ⁢ 
                       n 
                     
                     - 
                     1 
                   
                 
               
             
           
         
       
     
     At next step S 811 , the processor  200  commands the transfer of the information RIV′ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS 
     According to the above mentioned example: 
     C(N RBG +1, 2n′)=1001 
     S 0 (M 0 )=0, 
     S 1 (M 0 ,M 1 )=495, 
     S 2 (M 0 ,M 1 ,M 2 )=204, 
     S 3 (M 0 ,M 1 ,M 2 ,M 3 )=46, 
     S 4 (M 0 ,M 1 ,M 2 ,M 3 ,M 4 )=0, 
     and S 5 (M 0 ,M 1 ,M 2 ,M 3 ,M 4 ,M 5 )=0. 
     RIV′ is equal to 1746. 
       FIG. 9  discloses a third example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a third mode of realisation of the present invention. 
     In the third mode of realisation, the allocated clusters have the same number of groups of resource blocks. The number n of clusters of at least one group of resource blocks is known by both the base station BS and mobile station MS. 
     For an allocation of n clusters having the same number of groups of resource blocks, Q=n+1 independent parameters are needed, under a weighted sum constraint 
     
       
         
           
             
               
                 ∑ 
                 
                   k 
                   = 
                   0 
                 
                 
                   Q 
                   - 
                   1 
                 
               
               ⁢ 
               
                 
                   q 
                   k 
                 
                 ⁢ 
                 
                   M 
                   k 
                 
               
             
             ≤ 
             
               
                 N 
                 RBG 
               
               + 
               1. 
             
           
         
       
     
     The Q parameters represent the n gaps between clusters and the group of groups of resource blocks which are not allocated to the mobile station and which has or have an index lower than the index of the first group of resource blocks allocated to the mobile station MS, plus the number of groups of resource blocks comprised in each cluster. 
     These parameters may appear in any order. The coefficient q corresponding to the parameter representative of number of groups of resource blocks comprised in each cluster is equal to n. All the others coefficients are equal to one. 
     Let M r  be the parameter corresponding to the number of groups of resource blocks comprised in each cluster and let us suppose in a first instance that r&gt;0. The weighted sum constraint becomes: 
     
       
         
           
             
               
                 n 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   M 
                   r 
                 
               
               + 
               
                 
                   ∑ 
                   
                     
                       k 
                       = 
                       0 
                     
                     
                       k 
                       ≠ 
                       r 
                     
                   
                   n 
                 
                 ⁢ 
                 
                   M 
                   k 
                 
               
             
             ≤ 
             
               
                 N 
                 RBG 
               
               + 
               1. 
             
           
         
       
     
     For all k&lt;r, for any fixed parameter (M 0  . . . M k−1 ), the parameter M k  takes values from 1 to 
                 M     k   ,   max       ⁢     |     k   &lt;   r         =       N   RBG     +   2   -     2   ⁢   n     +   k   -       ∑     p   =   0       k   -   1       ⁢     M   p               
where | k&lt;r  denotes the condition k&lt;r. For any fixed (M 0  . . . M k ), there are:
 
               ∑       M   r     =   1       floor   ⁡     [       (       N   RGB     +   2   -       ∑     p   =   0     k     ⁢     M   p       -   n   +   k     )     /   n     ]         ⁢     C   (         N   RBG     +   1   -       ∑     p   =   0     k     ⁢     M   p       -     n   ⁢           ⁢     M   r         ,     n   -   k   -   1       )           
possibilities of allocation where floor(x) is the integer part of x.
 
     For any fixed (M 0  . . . M r-1 ), M r  takes values from 1 to 
     
       
         
           
             
               M 
               
                 r 
                 , 
                 max 
               
             
             = 
             
               
                 floor 
                 ⁡ 
                 
                   [ 
                   
                     
                       ( 
                       
                         
                           N 
                           RGB 
                         
                         + 
                         1 
                         - 
                         
                           
                             ∑ 
                             
                               p 
                               = 
                               0 
                             
                             
                               r 
                               - 
                               1 
                             
                           
                           ⁢ 
                           
                             M 
                             p 
                           
                         
                         - 
                         n 
                         + 
                         r 
                       
                       ) 
                     
                     / 
                     n 
                   
                   ] 
                 
               
               . 
             
           
         
       
     
     For any fixed (M 0  . . . M r ), there are 
             C   (         N   RBG     +   1   -       ∑     p   =   0       r   -   1       ⁢     M   p       -     n   ⁢           ⁢     M   r         ,     n   -   r       )         
possible resource allocations.
 
     For all k&gt;r, for any fixed (M 0  . . . M k−1 ), the parameter M k  tales values from 1 to 
     
       
         
           
             
               
                 M 
                 
                   k 
                   , 
                   max 
                 
               
               ⁢ 
               
                 | 
                 
                   k 
                   &gt; 
                   r 
                 
               
             
             = 
             
               
                 N 
                 RBG 
               
               + 
               1 
               - 
               n 
               + 
               k 
               - 
               
                 
                   ∑ 
                   
                     
                       p 
                       = 
                       0 
                     
                     
                       p 
                       ≠ 
                       r 
                     
                   
                   
                     k 
                     - 
                     1 
                   
                 
                 ⁢ 
                 
                   M 
                   p 
                 
               
               - 
               
                 n 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   
                     M 
                     r 
                   
                   . 
                 
               
             
           
         
       
     
     For any fixed (M 0  . . . M k ), there are 
             C   (         N   RBG     +   1   -       ∑       p   =   0       p   ≠   k       k     ⁢     M   p       -     n   ⁢           ⁢     M   r         ,     n   -   k       )         
possible combinations.
 
     Then, for all k=0 . . . n, the number of groups with m p =M p , for p&lt;k, m k &lt;M k , and any choice of m k+1 . . . n , 
     
       
         
           
             
               
                 
                   
                     
                       S 
                       
                         k 
                         , 
                         eqclusters 
                       
                     
                     ⁡ 
                     
                       ( 
                       
                         
                           M 
                           0 
                         
                         , 
                         
                           … 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             M 
                             k 
                           
                         
                       
                       ) 
                     
                   
                   = 
                   
                     
                       ∑ 
                       
                         
                           m 
                           k 
                         
                         = 
                         1 
                       
                       
                         
                           M 
                           k 
                         
                         - 
                         1 
                       
                     
                     ⁢ 
                     
                       ∑ 
                       
                         
                           M 
                           r 
                         
                         = 
                         1 
                       
                       
                         floor 
                         ⁡ 
                         
                           [ 
                           
                             
                               ( 
                               
                                 
                                   N 
                                   RGB 
                                 
                                 + 
                                 2 
                                 - 
                                 
                                   
                                     ∑ 
                                     
                                       p 
                                       = 
                                       0 
                                     
                                     
                                       k 
                                       - 
                                       1 
                                     
                                   
                                   ⁢ 
                                   
                                     M 
                                     p 
                                   
                                 
                                 - 
                                 
                                   m 
                                   k 
                                 
                                 - 
                                 n 
                                 + 
                                 k 
                               
                               ) 
                             
                             / 
                             n 
                           
                           ] 
                         
                       
                     
                   
                 
                   
               
               ⁢ 
               
                 C 
                 ( 
                 
                   
                     
                       N 
                       RBG 
                     
                     + 
                     1 
                     - 
                     
                       
                         ∑ 
                         
                           p 
                           = 
                           0 
                         
                         
                           k 
                           - 
                           1 
                         
                       
                       ⁢ 
                       
                         M 
                         p 
                       
                     
                     - 
                     
                       m 
                       k 
                     
                     - 
                     
                       n 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       
                         M 
                         r 
                       
                     
                   
                   , 
                   
                     n 
                     - 
                     k 
                     - 
                     1 
                   
                 
                 ) 
               
             
             , 
             
                
             
             ⁢ 
             
                 
             
             ⁢ 
             
               
                 if 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 k 
               
               &lt; 
               r 
             
           
         
       
       
         
           
             
                 
             
             ⁢ 
             
               
                 
                   ∑ 
                   
                     
                       m 
                       k 
                     
                     = 
                     1 
                   
                   
                     
                       M 
                       k 
                     
                     - 
                     1 
                   
                 
                 ⁢ 
                 
                   C 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                       - 
                       
                         
                           ∑ 
                           
                             p 
                             = 
                             0 
                           
                           
                             r 
                             - 
                             1 
                           
                         
                         ⁢ 
                         
                           M 
                           p 
                         
                       
                       - 
                       
                         n 
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         
                           m 
                           r 
                         
                       
                     
                     , 
                     
                       n 
                       - 
                       r 
                     
                   
                   ) 
                 
               
               , 
               
                 
 
               
               ⁢ 
               
                   
               
               ⁢ 
               
                 
                   if 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   k 
                 
                 = 
                 r 
               
             
           
         
       
       
         
           
             
                 
             
             ⁢ 
             
               
                 
                   ∑ 
                   
                     
                       m 
                       k 
                     
                     = 
                     1 
                   
                   
                     
                       M 
                       k 
                     
                     - 
                     1 
                   
                 
                 ⁢ 
                 
                   C 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                       - 
                       
                         
                           ∑ 
                           
                             
                               p 
                               = 
                               0 
                             
                             
                               p 
                               ≠ 
                               k 
                             
                           
                           
                             k 
                             - 
                             1 
                           
                         
                         ⁢ 
                         
                           M 
                           p 
                         
                       
                       - 
                       
                         m 
                         k 
                       
                       - 
                       
                         n 
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         
                           M 
                           r 
                         
                       
                     
                     , 
                     
                       n 
                       - 
                       k 
                     
                   
                   ) 
                 
               
               , 
               
                 
 
               
               ⁢ 
               
                   
               
               ⁢ 
               
                 
                   if 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   k 
                 
                 &gt; 
                 
                   r 
                   . 
                 
               
             
           
         
       
     
     The information RIV″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS is equal to: 
     
       
         
           
             
               
                 RIV 
                 ″ 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   , 
                   
                     M 
                     1 
                   
                   , 
                   … 
                   ⁢ 
                   
                       
                   
                   , 
                   
                     M 
                     n 
                   
                 
                 ) 
               
             
             = 
             
               
                 ∑ 
                 
                   k 
                   = 
                   0 
                 
                 n 
               
               ⁢ 
               
                 
                   
                     S 
                     
                       k 
                       , 
                       eqclusters 
                     
                   
                   ⁡ 
                   
                     ( 
                     
                       
                         M 
                         0 
                       
                       , 
                       … 
                       ⁢ 
                       
                           
                       
                       , 
                       
                         M 
                         k 
                       
                     
                     ) 
                   
                 
                 . 
               
             
           
         
       
     
     The inventors of the present invention have found that by selecting M o  as being the number of groups of resource blocks comprised in each of the clusters, the above mentioned formulas can be simplified. 
     The weighted sum constraint becomes: 
     
       
         
           
             
               
                 n 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   M 
                   0 
                 
               
               + 
               
                 
                   ∑ 
                   
                     k 
                     = 
                     1 
                   
                   n 
                 
                 ⁢ 
                 
                   M 
                   k 
                 
               
             
             ≤ 
             
               
                 N 
                 RBG 
               
               + 
               1 
             
           
         
       
     
     M 0  takes values from 1 to floor((N RBG +1−n)/n). For any fixed M 0  there are C(N RBG +1−nM 0 ,n) possible combinations. 
     For any k&gt;0, for any fixed (M 0  . . . M k−1 ) parameters, the parameter M k  takes values from 1 to 
     
       
         
           
             
               M 
               
                 k 
                 , 
                 max 
               
             
             = 
             
               
                 N 
                 RBG 
               
               + 
               1 
               - 
               n 
               + 
               k 
               - 
               
                 n 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   M 
                   0 
                 
               
               - 
               
                 
                   ∑ 
                   
                     p 
                     = 
                     1 
                   
                   
                     k 
                     - 
                     1 
                   
                 
                 ⁢ 
                 
                   
                     M 
                     p 
                   
                   . 
                 
               
             
           
         
       
     
     For any fixed (M 0  . . . M k ) parameters, there are 
             C   ⁢     (         N   RBG     +   1   -       ∑     p   =   1     k     ⁢     M   p       -     n   ⁢           ⁢     M   0         ,     n   -   k       )           
possible allocations.
 
     Overall, there are 
                 RIV     n   ,   max     ″     =         ∑       M   0     =   1         floor   ⁢           ⁢   NRBG     +   1   -     n   /   n         ⁢     CN   RBG       +   1   -     nM   0         ,   n         
possible allocations with n equal clusters.
 
     For example, the present algorithm will be described when it is executed by the processor  200  of the base station BS. 
     It has to be noted here that in a variant, instead of being executed by the base station BS, the present algorithm is executed by a core network device not shown in  FIG. 1  of the wireless cellular telecommunication device for plural base stations BS. 
     The present algorithm is executed each time clusters of sub-carriers are allocated to a mobile station MS handled by the base station BS. 
     At step S 900 , the processor  200  allocates groups of resource blocks to the mobile station MS. The allocated groups of resource blocks are allocated for example according to channel conditions and/or according to required quality of service. 
     At next step S 901 , the processor  200  determines the parameters from the allocated groups of resource blocks and sets M 0  to the number of groups of resource blocks which are allocated to the mobile station MS in each cluster of one or plural contiguous groups of resource blocks. 
     For example, the allocated groups of resource blocks and the determined parameters are as disclosed in  FIG. 10 . 
       FIG. 10  represents a second example of three clusters of at least one group of resource blocks allocated to a mobile station and parameters according to the present invention. 
     In the example of  FIG. 10 , three clusters of at least one group of resource blocks are allocated to one mobile station MS and are not contiguous. Each allocated cluster comprises the same number of groups of resource blocks. 
       FIG. 10  discloses fourteen groups of resource blocks. The first group of resource blocks which is hachured in  FIG. 10 , is a dummy one. The ordered groups of resource blocks having an index varying from  1  to  13  are the one of the wireless cellular telecommunication network which may be allocated to the mobile station MS. Four parameters noted M o  to M 3  are needed to represent the groups of resource blocks which are allocated to the mobile station MS. 
     The parameter M 0  represents the number of groups of resource blocks which are allocated to the mobile station MS in each cluster of one or plural contiguous groups of resource blocks. In the example of  FIG. 10 , M 0  is equal to two. The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  2  and  3  is associated to the parameter M 0 . 
     The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  7  and  8  is associated to the parameter M 0 . 
     The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  11  and  12  is associated to the parameter M 0 . 
     The parameter M 1  represents the number plus one of physically existing groups of resource blocks which are not allocated to the mobile station MS and which have an index inferior to the index of the first group of resource blocks of the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 10 , M 1  is equal to two. The subset of at least one group of resource blocks which comprises the dummy group of resource blocks and the group of resource blocks having the index  1  is associated to the parameter M 1 . 
     The parameter M 2  represents the number of groups of resource blocks which are between the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS and the second cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 10 , M 2  is equal to three. The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  4 ,  5  and  6  is associated to the parameter M 2 . 
     The parameter M 3  represents the number of groups of resource blocks which are between the second cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS and the third cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 10 , M 3  is equal to two. The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  9  and  10  is associated to the parameter M 3 . 
     At next step S 902 , the processor  200  calculates a sum S″ 0 (M 0 ) according to the following formula: 
     
       
         
           
             
               
                 
                   S 
                   0 
                   ″ 
                 
                 ⁡ 
                 
                   ( 
                   
                     M 
                     0 
                   
                   ) 
                 
               
               = 
               
                 
                   
                     ∑ 
                     
                       
                         m 
                         0 
                       
                       = 
                       1 
                     
                     
                       
                         M 
                         0 
                       
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                     
                       
                         C 
                         ⁡ 
                         
                           ( 
                           
                             
                               
                                 N 
                                 RBG 
                               
                               + 
                               1 
                               - 
                               
                                 n 
                                 ⁢ 
                                 
                                     
                                 
                                 ⁢ 
                                 
                                   m 
                                   0 
                                 
                               
                             
                             , 
                             n 
                           
                           ) 
                         
                       
                       . 
                       
                           
                       
                       ⁢ 
                       If 
                     
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       M 
                       0 
                     
                   
                 
                 = 
                 1 
               
             
             , 
             
               
                 S 
                 0 
               
               = 
               0. 
             
           
         
       
     
     According to the example of  FIG. 10 , S 0 ″(M 0 )=165. 
     The sum S 0 ″(M 0 ) is the number of possible resource allocations with m 0 &lt;M 0 . Here, this is the number of possible resource allocation configurations with equal clusters containing less than M 0  resource block groups each. 
     At next step S 903 , the processor  200  sets the value of the information RIV″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value S 0 ″(M 0 ). 
     At next step S 904 , the processor  200  sets the value of the variable k to one. 
     At next step S 905 , the processor  200  calculates a sum S k ″(M 0 , . . . , M k ) according to the following formula: 
     
       
         
           
             
               
                 S 
                 k 
                 ″ 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   … 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     M 
                     k 
                   
                 
                 ) 
               
             
             = 
             
               
                 ∑ 
                 
                   
                     m 
                     k 
                   
                   = 
                   1 
                 
                 
                   
                     M 
                     k 
                   
                   - 
                   1 
                 
               
               ⁢ 
               
                 C 
                 ⁡ 
                 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                       - 
                       
                         
                           ∑ 
                           
                             p 
                             = 
                             1 
                           
                           
                             k 
                             - 
                             1 
                           
                         
                         ⁢ 
                         
                           M 
                           p 
                         
                       
                       - 
                       
                         nM 
                         0 
                       
                       - 
                       
                         m 
                         k 
                       
                     
                     , 
                     
                       n 
                       - 
                       k 
                     
                   
                   ) 
                 
               
             
           
         
       
       
         
           and 
         
       
       
         
           
             
               
                 S 
                 k 
                 “ 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   , 
                   … 
                   ⁢ 
                   
                       
                   
                   , 
                   
                     M 
                     k 
                   
                 
                 ) 
               
             
             = 
             
               
                 0 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 if 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 
                   M 
                   k 
                 
               
               = 
               1. 
             
           
         
       
     
     The sum S k (M 0 , . . . , M k ) is the total number of possible resource allocations with the k subsets of groups of resource blocks comprising respectively an amount of groups of resource blocks of exactly M 0 , . . . M k−1 , and with a (k+1)-th subset of groups of resource blocks comprising an amount of resources m k  inferior to the value of the parameter M k . 
     In other words, for each value of k, with k=1 . . . n, the processor  200  calculates, within the set of possible groups of resource blocks allocations, the number of possibilities of having for each subset corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k  an amount of groups of resource blocks that is equal to the corresponding parameter M 0  to M k−1  and having in the subset corresponding to the parameter M k  an amount of groups of resource blocks that is lower than the parameter M k . 
     At next step S 906 , the processor  200  sets the value of the information RIV″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value RIV″+S k ″(M 0 , . . . , M k ). 
     At next step S 907 , the processor  200  checks if k is equal to n. If k is equal to n, the processor  200  moves to step S 909 . Otherwise, the processor  200  moves to step S 908 , increments the variable k by one and returns to step S 905 . 
     At next step S 909 , the processor  200  commands the transfer of the information RIV″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS 
     According to the above mentioned example: 
     S 0 ″(M 0 )=165, 
     S 1 −(M 0 ,M 1 )=21, 
     S 2 ″(M 0 ,M 1 ,M 2 )=9, 
     and S 3 ″(M 0 ,M 1 ,M 2 ,M 3 )=1. 
     RIV″ is equal to 196. 
     It has to be noted here that in a variant, the number of clusters may be decided by the base station BS and is not known by the mobile station MS. 
     In such case, instead of setting at step S 903  the value of the information RIV″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value S 0 ″(M 0 ), the processor  200  sets the value of the information RIV″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value 
     
       
         
           
             
               
                 S 
                 0 
                 
                   ‘ 
                   ’ 
                 
               
               ⁡ 
               
                 ( 
                 
                   M 
                   0 
                 
                 ) 
               
             
             + 
             
               
                 ∑ 
                 
                   
                     n 
                     ′ 
                   
                   = 
                   
                     n 
                     min 
                   
                 
                 
                   n 
                   - 
                   1 
                 
               
               ⁢ 
               
                 
                   RIV 
                   
                     
                       n 
                       ′ 
                     
                     , 
                     max 
                   
                   ″ 
                 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 where 
               
             
           
         
       
       
         
           
             
               
                 RIV 
                 
                   
                     n 
                     ′ 
                   
                   , 
                   max 
                 
                 ″ 
               
               = 
               
                 
                   
                     ∑ 
                     
                       
                         M 
                         0 
                       
                       = 
                       1 
                     
                     
                       
                         floor 
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         NRBG 
                       
                       + 
                       1 
                       - 
                       
                         
                           n 
                           ′ 
                         
                         / 
                         
                           n 
                           ′ 
                         
                       
                     
                   
                   ⁢ 
                   
                     CN 
                     RBG 
                   
                 
                 + 
                 1 
                 - 
                 
                   
                     n 
                     ′ 
                   
                   ⁢ 
                   
                     M 
                     0 
                   
                 
               
             
             , 
             
               
                 n 
                 ′ 
               
               . 
             
           
         
       
     
       FIG. 11  discloses a fourth example of an algorithm executed by a base station in order to indicate the groups of resource blocks allocated to a mobile station according to a fourth mode of realization of the present invention. 
     In the fourth mode of realization, the allocated clusters are spaced by the same number of groups of resource blocks. The number n of clusters of at least one group of resource blocks is known by both the base station BS and the mobile station MS. 
     Here, Q=n+2 parameters are necessary. One parameter for the inter-clusters gaps, one parameter is for the number plus one of physically existing groups of resource blocks not allocated to the mobile station MS having an index value lower than the first group of resource blocks allocated to the mobile station MS and n parameters for the n cluster sizes. 
     To simplify the formulas, the common inter cluster gap value is the first parameter, the second parameter is the number plus one of physically existing groups of resource blocks not allocated to the mobile station MS and having an index value lower than the first group of resource blocks allocated to the mobile station MS and next parameters are the n values of cluster sizes. 
     The formulas are similar to the third mode of realization with some slight modifications: Q=n+2, q0=n−1, q k =1 for any k=1 . . . n+1. 
     The weighted sum constraint becomes: 
     
       
         
           
             
               
                 
                   ( 
                   
                     n 
                     - 
                     1 
                   
                   ) 
                 
                 ⁢ 
                 
                   M 
                   0 
                 
               
               + 
               
                 
                   ∑ 
                   
                     k 
                     = 
                     1 
                   
                   
                     n 
                     + 
                     1 
                   
                 
                 ⁢ 
                 
                   M 
                   k 
                 
               
             
             ≤ 
             
               
                 N 
                 RBG 
               
               + 
               1 
             
           
         
       
     
     M 0  takes values from 1 to floor((N RBG −n)/(n−1)). For any fixed M 0  there are C(N RBG +1−(n−1)M 0 ,n+1) possible combinations. 
     For any k&gt;0, for any fixed (M 0  . . . M k−1 ), parameter M k  tales values from 1 to 
                     M     k   ,   max       =       ⁢       N   RBG     +   1   -       (     n   -   1     )     ⁢     M   0       -       ∑     p   =   1       k   -   1       ⁢     M   p       -     (     n   +   1   -   k     )                   =       ⁢       N   RBG     -   n   +   k   -       (     n   -   1     )     ⁢     M   0       -       ∑     p   =   1       k   -   1       ⁢       M   p     .                     
For any fixed (M 0  . . . M k ), there are
 
             C   ⁡     (         N   RBG     +   1   -       ∑     p   =   1     k     ⁢     M   p       -       (     n   -   1     )     ⁢     M   0         ,     n   -   k   +   1       )           
possible allocations.
 
     Overall, there are 
                 RIV   nmax   ′′′     =         ∑       M   0     =   1         floor   ⁢           ⁢     N   RBG       -     n   /     (     n   -   1     )           ⁢     CN   RBG       +   1   -       (     n   -   1     )     ⁢     M   0           ,     n   +   1           
possible resource allocation configurations with n clusters of any size but equally spaced.
 
     For example, the present algorithm will be described when it is executed by the processor  200  of the base station BS. 
     It has to be noted here that in a variant, instead of being executed by the base station BS, the present algorithm is executed by a core network device not shown in  FIG. 1  of the wireless cellular telecommunication device for plural base stations BS. 
     The present algorithm is executed each time clusters of sub-carriers are allocated to a mobile station MS handled by the base station BS. 
     At step S 1100 , the processor  200  allocates groups of resource blocks to the mobile station MS. The allocated groups of resource blocks are allocated for example according to channel conditions and/or according to required quality of service. 
     At next step S 1101 , the processor  200  determines the parameters from the allocated groups of resource blocks and sets M 0  to the number of groups of resource blocks which separate two clusters of groups of resource blocks which are allocated to the mobile station MS. 
     For example, the allocated groups of resource blocks and the determined parameters are as disclosed in  FIG. 12 . 
       FIG. 12  represents a third example of three clusters of at least one group of resource blocks allocated to a mobile station and parameters according to the present invention. 
     In the example of  FIG. 12 , three clusters of at least one group of resource blocks are allocated to one mobile station MS and are not contiguous. Each cluster is separated from another cluster by the same number of groups of resource blocks. 
       FIG. 12  discloses fourteen groups of resource blocks. The first group of resource blocks which is hachured in  FIG. 12 , is a dummy one. The groups of resource blocks are ordered and have an index varying from  1  to  13 . The groups of resource blocks are the one of the wireless cellular telecommunication network which may be allocated to the mobile station MS. 
     Five parameters noted M 0  to M 4  are needed to represent the groups of resource blocks which are allocated to the mobile station MS. 
     The parameter M 0  represents the number of groups of resource blocks which separate two clusters of at least one group of resource blocks which are allocated to the mobile station MS. In the example of  FIG. 12 , M 0  is equal to two. 
     The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  2  and  3  is associated to the parameter M 0 . 
     The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  7  and  8  is associated to the parameter M 0 . 
     The parameter M 1  represents the number of physically existing groups of resource blocks plus one which are not allocated to the mobile station MS and which have an index inferior to the index of the first group of resource blocks of the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 12 , M 1  is equal to one. The subset of at least one group of resource blocks which comprises the dummy group of resource blocks is associated to the parameter M 1 . 
     The parameter M 2  represents the number of groups of resource blocks which are comprised in the first cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 12 , M 2  is equal to one. The subset of at least one group of resource blocks which comprises the group of resource blocks having the index  1  is associated to the parameter M 2 . 
     The parameter M 3  represents the number of groups of resource blocks which are comprised in the second cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 12 , M 3  is equal to three. The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  4 ,  5  and  6  is associated to the parameter M 3 . 
     The parameter M 4  represents the number of groups of resource blocks which are comprised in the third cluster of one or plural contiguous groups of resource blocks allocated to the mobile station MS. In the example of  FIG. 12 , M 4  is equal to two. The subset of at least one group of resource blocks which comprises the groups of resource blocks having the indexes  9  and  10  is associated to the parameter M 4 . 
     At next step S 1102 , the processor  200  calculates a sum S 0 (M 0 ) according to the following formula: 
     
       
         
           
             
               
                 
                   S 
                   0 
                   ′′′ 
                 
                 ⁡ 
                 
                   ( 
                   
                     M 
                     0 
                   
                   ) 
                 
               
               = 
               
                 
                   
                     ∑ 
                     
                       
                         m 
                         0 
                       
                       = 
                       1 
                     
                     
                       
                         M 
                         0 
                       
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                     
                       
                         C 
                         ⁡ 
                         
                           ( 
                           
                             
                               
                                 N 
                                 RBG 
                               
                               + 
                               1 
                               - 
                               
                                 
                                   ( 
                                   
                                     n 
                                     - 
                                     1 
                                   
                                   ) 
                                 
                                 ⁢ 
                                 
                                   m 
                                   0 
                                 
                               
                             
                             , 
                             
                               n 
                               + 
                               1 
                             
                           
                           ) 
                         
                       
                       . 
                       
                           
                       
                       ⁢ 
                       If 
                     
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       M 
                       0 
                     
                   
                 
                 = 
                 1 
               
             
             , 
             
               
                 S 
                 0 
               
               = 
               0. 
             
           
         
       
     
     According to the example of  FIG. 10 , S 0 ′″(M 0 )=165. 
     The sum S 0 ′″(M 0 ) is the number of possible resource allocations with m 0 &lt;M 0 . Here, this is the number of possible resource allocations with clusters of any size spaced by equal inter-clusters gaps containing the same number of groups of resource blocks which is less than M 0 . 
     At next step S 1103 , the processor  200  sets the value of the information RIV′″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value S 0 ′″(M 0 ). 
     At next step S 1104 , the processor  200  sets the value of the variable k to one. 
     At next step S 1105 , the processor  200  calculates a sum S k ′″(M 0 , . . . , M k ) according to the following formula: 
     
       
         
           
             
               
                 S 
                 k 
                 ′′′ 
               
               ⁡ 
               
                 ( 
                 
                   
                     M 
                     0 
                   
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   … 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     M 
                     k 
                   
                 
                 ) 
               
             
             = 
             
               
                 ∑ 
                 
                   
                     m 
                     k 
                   
                   = 
                   1 
                 
                 
                   
                     M 
                     k 
                   
                   - 
                   1 
                 
               
               ⁢ 
               
                 C 
                 ⁡ 
                 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                       - 
                       
                         
                           ∑ 
                           
                             p 
                             = 
                             1 
                           
                           
                             k 
                             - 
                             1 
                           
                         
                         ⁢ 
                         
                           M 
                           p 
                         
                       
                       - 
                       
                         
                           ( 
                           
                             n 
                             - 
                             1 
                           
                           ) 
                         
                         ⁢ 
                         
                           M 
                           0 
                         
                       
                       - 
                       
                         m 
                         k 
                       
                     
                     , 
                     
                       n 
                       - 
                       k 
                       + 
                       1 
                     
                   
                   ) 
                 
               
             
           
         
       
       
         
           
             
                 
             
             ⁢ 
             and 
           
         
       
       
         
           
             
                 
             
             ⁢ 
             
               
                 
                   S 
                   k 
                   
                     
                       ’ 
                       ’ 
                     
                     ’ 
                   
                 
                 ⁡ 
                 
                   ( 
                   
                     
                       M 
                       0 
                     
                     , 
                     … 
                     ⁢ 
                     
                         
                     
                     , 
                     
                       M 
                       k 
                     
                   
                   ) 
                 
               
               = 
               
                 
                   0 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   if 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     M 
                     k 
                   
                 
                 = 
                 1. 
               
             
           
         
       
     
     The sum S k (M 0 , . . . , M k ) is the total number of possible resource allocations with the k subsets of groups of resource blocks comprising respectively an amount of groups of resource blocks of exactly M 0 , . . . M k−1 , and with a (k+1)-th subset of groups of resource blocks comprising an amount of resources m k  inferior to the value of the parameter M k . 
     In other words, for each value of k, with k=1 . . . n+1, the processor  200  calculates, within the set of possible groups of resource blocks allocations, the number of possibilities of having for each subset corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k  an amount of groups of resource blocks that is equal to the corresponding parameter M 0  to M k−1  and having in the subset corresponding to the parameter M k  an amount of groups of resource blocks that is lower than the parameter M k . 
     At next step S 1106 , the processor  200  sets the value of the information RIV′″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value RIV′″+S k ′″(M 0 , . . . , M k ). 
     At next step S 1106 , the processor  200  checks if k is equal to n+1. If k is equal to n+1, the processor  200  moves to step S 1109 . Otherwise, the processor  200  moves to step S 1108 , increments the variable k by one and returns to step S 1105 . 
     At next step S 1109 , the processor  200  commands the transfer of the information RIV′″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS. 
     According to the above mentioned example: 
     S 0 ′″(M 0 )=495, 
     S 1 ′″(M 0 ,M 1 )=0, 
     S 2 ′″(M 0 ,M 1 ,M 2 )=0, 
     S 3 ′″(M 0 ,M 1 ,M 2 ,M 3 )=13 
     and S 4 ′″(M 0 ,M 1 ,M 2 ,M 3 ,M 4 )=1. 
     RIV′″ is equal to 509. 
     It has to be noted here that in a variant, the number of clusters may be decided by the base station BS and is not known by the mobile station MS. 
     In such case, instead of setting at step S 903  the value of the information RIV′″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value S 0 ′″(M 0 ), the processor  200  sets the value of the information RIV′″ enabling the mobile station MS to identify which resources of the wireless telecommunication network are allocated to the mobile station MS to the value 
     
       
         
           
             
               
                 S 
                 0 
                 
                   
                     ’ 
                     ’ 
                   
                   ’ 
                 
               
               ⁡ 
               
                 ( 
                 
                   M 
                   0 
                 
                 ) 
               
             
             + 
             
               
                 ∑ 
                 
                   
                     n 
                     ′ 
                   
                   = 
                   
                     n 
                     min 
                   
                 
                 
                   n 
                   - 
                   1 
                 
               
               ⁢ 
               
                 
                   RIV 
                   
                     
                       n 
                       ′ 
                     
                     , 
                     max 
                   
                   ′′′ 
                 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 where 
               
             
           
         
       
       
         
           
             
               
                 RIV 
                 
                   
                     n 
                     ′ 
                   
                   ⁢ 
                   max 
                 
                 ′′′ 
               
               = 
               
                 
                   
                     ∑ 
                     
                       
                         M 
                         0 
                       
                       = 
                       1 
                     
                     
                       
                         floor 
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         
                           N 
                           RBG 
                         
                       
                       - 
                       
                         
                           n 
                           ′ 
                         
                         / 
                         
                           ( 
                           
                             
                               n 
                               ′ 
                             
                             - 
                             1 
                           
                           ) 
                         
                       
                     
                   
                   ⁢ 
                   
                     CN 
                     RBG 
                   
                 
                 + 
                 1 
                 - 
                 
                   
                     ( 
                     
                       
                         n 
                         ′ 
                       
                       - 
                       1 
                     
                     ) 
                   
                   ⁢ 
                   
                     M 
                     0 
                   
                 
               
             
             , 
             
               
                 n 
                 ′ 
               
               + 
               1 
             
           
         
       
     
       FIG. 13  discloses a first example of an algorithm executed by a mobile station according to the first mode of realization of the present invention. 
     In the first mode of realization, the number n of clusters of at least one group of resource blocks is known by the mobile station MS. 
     More precisely, the present algorithm is executed by the processor  300  of each mobile station MS. 
     At step S 1300 , the processor  300  detects the reception through the wireless interface  305  of information RIV n  enabling the determination of which groups of resource blocks are allocated to the mobile station MS. 
     At next step S 1301 , the processor  300  finds M′ 0  such that S 0 (M 0 ′)≦RIV n &lt;S 0 (M 0 ′+1) using the same formula as the one disclosed at step S 702  of  FIG. 7 . 
     According to the example of  FIG. 6 , S 0 (1)=0≦745&lt;S 0 (2)=C(13,5)=1287. 
     The processor  300  finds M′ 0 =1. 
     At next step S 1302 , the processor  300  decides that M 0 =M′ o =1. 
     In other words, the processor  300 :
         determines a number of possibilities of having a subset of at least one group of resource blocks corresponding to the parameter M 0 , the subset comprising less than a first amount of resources M′ 0 ,   determines a number of possibilities of having a subset of at least one resource corresponding to the parameter M 0 , the subset comprising less than the amount M′ 0  plus one of groups of resource blocks,   selects the first amount of groups of resource blocks as a first parameter if the number of possibilities of having a subset of at least one group of resource blocks corresponding to the first parameter, the subset comprising less than the first amount of groups of resource blocks, is lower than or equal to the received information and if the number of possibilities of having a subset corresponding to the first parameter, the subset of at least one group of resource blocks comprising less than the first amount of groups of resource blocks plus one, is upper than the received information.       

     At next step S 1303 , the processor  300  sets the information RIV n  enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV n  minus S 0 (M 0 ), i.e. to the value 745. 
     At next step S 1304 , the processor  300  sets the value of the variable k to one. 
     At next step S 1305 , the processor  300  finds M′ k  such that 
     S k (M 0 , . . . , M k−1 ,M k ′)≦RIV n &lt;S k (M 0 , . . . , M k−1 ,M k ′+1) using the same formula as the one disclosed at step S 705  of  FIG. 7 . 
     In other words, the processor  300 :
         determines for the parameter M k , within the set of possible groups of resource blocks allocations:   a first number of possibilities of having for each subset of at least one group of resource blocks corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k , each subset comprising an amount of groups of resource blocks that is equal to the parameter M 0  to M k−1  the subset corresponds to and having a subset of at least one group of resource blocks corresponding to the parameter M k  comprising an amount of groups of resource blocks that is lower than a given value,   a second number of possibilities of having for each subset of at least one group of resource blocks corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k , each subset comprising an amount of groups of resource blocks that is equal to the parameter M 0  to M k−1  the subset corresponds to and having a subset of at least one group of resource blocks corresponding to the parameter M k  comprising an amount of groups of resource blocks that is lower than the given value plus one,   selects the given value as the parameter M k  if the first number is lower than or equal to the modified information and if the second number is upper than the modified information,   updates the modified information by subtracting the first number from the modified information.       

     At next step S 1306 , the processor  300  sets the information RIV n  enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV n  minus S k (M 0 , . . . , M k ) 
     At next step S 1307 , the processor  300  checks if k is equal to 2n−1. If k is equal to 2n−1, the processor  200  interrupts the present algorithm as each parameter has been identified. Otherwise, the processor  300  moves to step S 1309 , increments the variable k by one and returns to steps S 1305 . 
     According to the example of  FIG. 6 : 
     S 1 (1,2)=495≦745&lt;S 1 (1,3)=825, the processor  300  determines M 1  as being equal to two, 
     RIV n  becomes equal to 250, 
     S 2 (1,2,3)=204≦745−495&lt;S 2 (1,2,4)=260, the processor  300  determines M 2  as being equal to three, 
     RIV n  becomes equal to 46, 
     S 3 (1,2,3,4)=46=RIV n &lt;S 3 (1,2,3,5)=52, the processor  300  determines M 3  as being equal to four, 
     RIV n  becomes equal to null value, 
     As RIV n  becomes equal to null value, the processor  300  determines M 4  and M 5  as being equal to one. All parameters being determined, the processor  300  interrupts the present algorithm. 
       FIG. 14  discloses a second example of an algorithm executed by a mobile station according to the second mode of realization of the present invention. 
     In the second mode of realization, the number n of clusters of at least one group of resource blocks may vary from n min  to n max , n min  being known by the mobile station MS. n min  is different from n max  and n min  is upper than one. n max  is equal to or lower than (N RBG +1)/2). 
     More precisely, the present algorithm is executed by the processor  300  of each mobile station MS. 
     At step S 1400 , the processor  300  detects the reception through the wireless interface  305  of information RIV′ enabling the determination of which groups of resource blocks are allocated to the mobile station MS. 
     At next step S 1401 , the processor  300  finds n such that: 
     
       
         
           
             
               
                 ∑ 
                 
                   
                     n 
                     ′ 
                   
                   = 
                   
                     n 
                     min 
                   
                 
                 
                   n 
                   - 
                   1 
                 
               
               ⁢ 
               
                 C 
                 ⁡ 
                 
                   ( 
                   
                     
                       
                         N 
                         RBG 
                       
                       + 
                       1 
                     
                     , 
                     
                       2 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       
                         n 
                         ′ 
                       
                     
                   
                   ) 
                 
               
             
             ≤ 
             
               RIV 
               ′ 
             
             &lt; 
             
               
                 ∑ 
                 
                   
                     n 
                     ′ 
                   
                   = 
                   
                     n 
                     min 
                   
                 
                 n 
               
               ⁢ 
               
                 
                   C 
                   ⁡ 
                   
                     ( 
                     
                       
                         
                           N 
                           RBG 
                         
                         + 
                         1 
                       
                       , 
                       
                         2 
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         
                           n 
                           ′ 
                         
                       
                     
                     ) 
                   
                 
                 . 
               
             
           
         
       
     
     According to the example of  FIG. 6 , C(14,4)=1001≦RIV′&lt;C(14,4)+C(14,6)=4004. 
     The processor  300  determines that n is equal to three. 
     At next step S 1403 , the processor  300  sets the information RIV′ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV′ minus 
                 ∑       n   ′     =     n   min       n     ⁢     C   ⁡     (         N   RBG     +   1     ,     2   ⁢           ⁢     n   ′         )         ,         
i.e. to the value 745.
 
     At next step S 1404 , the processor  300  finds M′ 0  such that S 0 (M 0 ′)≦RIV n &lt;S 0 (M 0 ′+1) using the same formulas as the one disclosed at steps S 702  and S 703  of  FIG. 7 . 
     According to the example of  FIG. 6 , S 0 (1)=0≦745&lt;S 0 (2)=C(13,5)=1287. 
     The processor  300  finds M′ 0 =1. 
     At next step S 1405 , the processor  300  decides that M 0 =M′ 0 =1. 
     In other words, the processor  300 :
         determines a number of possibilities of having a subset of at least one group of resource blocks corresponding to the parameter M 0 , the subset comprising less than a first amount of resources M′ 0 ,   determines a number of possibilities of having a subset of at least one resource corresponding to the parameter M 0 , the subset comprising less than the amount M′ 0  plus one of groups of resource blocks,   selects the first amount of groups of resource blocks as a first parameter if the number of possibilities of having a subset of at least one group of resource blocks corresponding to the first parameter, the subset comprising less than the first amount of groups of resource blocks, is lower than or equal to the received information and if the number of possibilities of having a subset corresponding to the first parameter, the subset of at least one group of resource blocks comprising less than the first amount of groups of resource blocks plus one, is upper than the received information.       

     At next step S 1406 , the processor  300  sets the information RIV′ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV′ minus S 0 (M 0 ), i.e. to the value 745. 
     At next step S 1407 , the processor  300  sets the variable k to the value one. 
     At next step S 1408 , the processor  300  finds M′ k  such that: 
     S k (M 0 , . . . , M k−1 ,M k ′)≦RIV′&lt;S k (M 0 , . . . , M k−1 ,M k ′+1) using the same formula as the one disclosed at step S 806  of  FIG. 8 . 
     At next step S 1409 , the processor  300  decides that M k =M′ k . 
     In other words, the processor  300 :
         determines for the parameter M k , within the set of possible groups of resource blocks allocations:   a first number of possibilities of having for each subset of at least one group of resource blocks corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k , each subset comprising an amount of groups of resource blocks that is equal to the parameter M 0  to M k−1  the subset corresponds to and having a subset of at least one group of resource blocks corresponding to the parameter M k  comprising an amount of groups of resource blocks that is lower than a given value,   a second number of possibilities of having for each subset of at least one group of resource blocks corresponding to a parameter M 0  to M k−1  having a lower rank than the parameter M k , each subset comprising an amount of groups of resource blocks that is equal to the parameter M 0  to M k−1  the subset corresponds to and having a subset of at least one group of resource blocks corresponding to the parameter M k  comprising an amount of groups of resource blocks that is lower than the given value plus one,   selects the given value as the parameter M k  if the first number is lower than or equal to the modified information and if the second number is upper than the modified information,   updates the modified information by subtracting the first number from the modified information.       

     At next step S 1410 , the processor  300  sets the information RIV′ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV′ minus S k (M 0 , . . . , M k ) 
     At next step S 1411 , the processor  300  checks if k is equal to 2n−1. If k is equal to 2n−1, the processor  200  interrupts the present algorithm as each parameter has been identified. Otherwise, the processor  300  moves to step S 1412 , increments the variable k by one and returns to steps S 1408 . 
     According to the example of  FIG. 6 : 
     S 1 (1,2)=495≦745&lt;S 1 (1,3)=825, the processor  300  determines M 1  as being equal to two, 
     RIV′ becomes equal to 250, 
     S 2 (1,2,3)=204≦745−495&lt;S 2 (1,2,4)=260, the processor  300  determines M 2  as being equal to three, 
     RIV′ becomes equal to 46, 
     S 3 (1,2,3,4)=46=RIV n &lt;S 3 (1,2,3,5)=52, the processor  300  determines M 3  as being equal to four, 
     RIV′ becomes equal to null value, 
     As RIV′ becomes equal to null value, the processor  300  determines M 4  and M 5  as being equal to one. 
     Since all the parameters have been determined, the processor  300  identifies among the set of resources that can be allocated in the wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station according to the determined parameters. 
       FIG. 15  discloses a third example of an algorithm executed by a mobile station according to the third mode of realization of the present invention. 
     In the third mode of realization, the allocated clusters have the same number of groups of resource blocks. 
     More precisely, the present algorithm is executed by the processor  300  of each mobile station MS. 
     At step S 1500 , the processor  300  detects the reception through the wireless interface  305  of information RIV″ enabling the determination of which groups of resource blocks are allocated to the mobile station MS. 
     At next step S 1501 , the processor  300  finds M′ 0  such that S″ 0 (M 0 ′)≦RIV n ″&lt;S″ 0 (M 0 +1) using the same formula as the one disclosed at step S 902  of  FIG. 9 . 
     According to the example of  FIG. 10 , S″ 0 (2)=165≦196&lt;S″ 0 (3)=285. 
     The processor  300  finds M′ 0 =2. 
     At next step S 1502 , the processor  300  decides that M 0 =M′ 0 =2. 
     At next step S 1503 , the processor  300  sets the information RIV″ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV″ minus S″ 0 (M 0 ), i.e. to the value 31. 
     At next step S 1504 , the processor  300  sets the variable k to the value one. 
     At next step S 1505 , the processor  300  finds M′ k  such that 
     S″ k (M 0 , . . . , M k−1 , M k ′)≦RIV n ″&lt;S″ k (M 0 , . . . , M k−1 , M k ′+1) using the same formula as the one disclosed at step S 905  of  FIG. 9 . 
     At next step S 1506 , the processor  300  decides that M k =M′ k . 
     At next step S 1507 , the processor  300  sets the information RIV″ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIV″ minus S″ k (M 0 , . . . , M k ). 
     At next step S 1508 , the processor  300  checks if k is equal to n. If k is equal to n, the processor  200  interrupts the present algorithm as each parameter has been identified. Otherwise, the processor  300  moves to step S 1509 , increments the variable k by one and returns to steps S 1305 . 
     According to the example of  FIG. 10 : 
     S″ 1 (2,2)=21≦31&lt;S″ 1 (2,3)=36, the processor  300  determines M 1  as being equal to two, 
     RIV″ becomes equal to 10, 
     S″ 2 (2,2,3)=9≦10&lt;S″ 2 (2,2,4)=12, the processor  300  determines M 2  as being equal to three, 
     RIV″ becomes equal to 1, 
     S″ 3 (2,2,3,2)=1=RIV″, the processor  300  determines M 3  as being equal to two, 
     RIV″ becomes equal to null value. 
     Since all the parameters have been determined, the processor  300  identifies among the set of resources that can be allocated in the wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station according to the determined parameters. 
     It has to be noted here that in a variant, the number of clusters may be decided by the base station BS and is not known by the mobile station MS. 
     In such case, the processor  300  executes similar steps as the steps S 1401  and S 1403  of  FIG. 14  prior to executing the step S 1501  using the following formulas:
         find n such that:       

     
       
         
           
             
               
                 
                   
                     ∑ 
                     
                       
                         n 
                         ′ 
                       
                       = 
                       
                         n 
                         min 
                       
                     
                     
                       n 
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                     RIV 
                     
                       
                         n 
                         ′ 
                       
                       , 
                       max 
                     
                     ″ 
                   
                 
                 ≤ 
                 
                   RIV 
                   ″ 
                 
                 &lt; 
                 
                   
                     
                       ∑ 
                       
                         
                           n 
                           ′ 
                         
                         = 
                         
                           n 
                           min 
                         
                       
                       n 
                     
                     ⁢ 
                     
                       RIV 
                       
                         
                           n 
                           ′ 
                         
                         , 
                         max 
                       
                       ″ 
                     
                   
                   - 
                   
                     RIV 
                     ″ 
                   
                 
               
               = 
               
                 
                   RIV 
                   ″ 
                 
                 - 
                 
                   
                     ∑ 
                     
                       
                         n 
                         ′ 
                       
                       = 
                       
                         n 
                         min 
                       
                     
                     
                       n 
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                     RIV 
                     
                       
                         n 
                         ′ 
                       
                       , 
                       max 
                     
                     ″ 
                   
                 
               
             
             , 
             
               
 
             
             ⁢ 
             
                 
             
             ⁢ 
             where 
           
         
       
       
         
           
             
                 
             
             ⁢ 
             
               
                 
                   RIV 
                   
                     
                       n 
                       ′ 
                     
                     , 
                     max 
                   
                   ″ 
                 
                 = 
                 
                   
                     
                       ∑ 
                       
                         
                           M 
                           0 
                         
                         = 
                         1 
                       
                       
                         
                           floor 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           NRBG 
                         
                         + 
                         1 
                         - 
                         
                           
                             n 
                             ′ 
                           
                           / 
                           
                             n 
                             ′ 
                           
                         
                       
                     
                     ⁢ 
                     
                       CN 
                       RBG 
                     
                   
                   + 
                   1 
                   - 
                   
                     
                       n 
                       ′ 
                     
                     ⁢ 
                     
                       M 
                       0 
                     
                   
                 
               
               , 
               
                 
                   n 
                   ′ 
                 
                 . 
               
             
           
         
       
     
       FIG. 16  discloses a fourth example of an algorithm executed by a mobile station according to the fourth mode of realization of the present invention. 
     In the fourth mode of realization, the allocated clusters are spaced by the same number of groups of resource blocks. 
     More precisely, the present algorithm is executed by the processor  300  of each mobile station MS. 
     At step S 1600 , the processor  300  detects the reception through the wireless interface  305  of information RIV′″ enabling the determination of which groups of resource blocks are allocated to the mobile station MS. 
     At next step S 1601 , the processor  300  finds M′ 0  such that S′″ 0 (M 0 )≦RIV′″&lt;S′″ 0 (M 0 ′+1) using the same formula as the one disclosed at step S 1102  of  FIG. 11 . 
     According to the example of  FIG. 12 , S′″ 0 (2)=495≦509&lt;S′″ 0 (3)=825. 
     The processor  300  finds M′ 0 =2. 
     At next step S 1602 , the processor  300  decides that M 0 =M′ 0 =2. 
     At next step S 1603 , the processor  300  sets the information RIV′″ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIVn′″ minus S′″ 0 (M 0 ), i.e. to the value 14. 
     At next step S 1604 , the processor  300  sets the variable k to the value one. 
     At next step S 1605 , the processor  300  finds M′ k  such that 
     S′″ k (M 0 , . . . , M k−1 , M k ′)≦RIV′″&lt;S′″ k (M 0 , . . . , M k−1 , M k ′++1) using the same formula as the one disclosed at step S 1105  of  FIG. 11 . 
     At next step S 1606 , the processor  300  decides that M k =M&#39; k . 
     At next step S 1607 , the processor  300  sets the information RIV′″ enabling the determination of which groups of resource blocks are allocated to the mobile station MS to the value of RIVn′″ minus S′″ k (M 0 , . . . , M k ) 
     At next step S 1608 , the processor  300  checks if k is equal to n+1. If k is equal to n+1, the processor  200  interrupts the present algorithm as each parameter has been identified. Otherwise, the processor  300  moves to step S 1609 , increments the variable k by one and returns to steps S 1605 . 
     According to the example of  FIG. 12 : 
     S′″ 1 (2,1)=0≦14&lt;S 1 (2,2)=84, the processor  300  determines M 1  as being equal to one, 
     RIV′″ becomes equal to 14, 
     S′″ 2 (2,1,1)=0≦14&lt;S′″ 2 (2,1,2)=28, the processor  300  determines M 2  as being equal to one, 
     RIV′″ becomes equal to 14, 
     S′″ 3 (2,1,1,3)=13≦14&lt;S′″ 3 (2,1,1,4)=18, RIV′″, the processor  300  determines M 3  as being equal to three, 
     RIV′″ becomes equal to one. 
     S′″ 4 (2,1,1,3,2)=RIV′″, the processor  300  determines M 4  as being equal to two. 
     Since all the parameters have been determined, the processor  300  identifies among the set of resources that can be allocated in the wireless telecommunication network to the mobile station, which resources of the wireless telecommunication network are allocated to the mobile station according to the determined parameters. 
     It has to be noted here that in a variant, the number of clusters may be decided by the base station BS and is not known by the mobile station MS. 
     In such case, the processor  300  executes similar steps as the steps S 1401  and S 1403  of  FIG. 14  prior to executing the step S 1601  using the following formulas:
         find n such that:       

     
       
         
           
             
               
                 
                   
                     ∑ 
                     
                       
                         n 
                         ′ 
                       
                       = 
                       
                         n 
                         min 
                       
                     
                     
                       n 
                       - 
                       1 
                     
                   
                   ⁢ 
                   
                     RIV 
                     
                       
                         n 
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                       max 
                     
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                 &lt; 
                 
                   
                     
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                         = 
                         
                           n 
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                       n 
                     
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                       RIV 
                       
                         
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                         , 
                         max 
                       
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                     RIV 
                     ′′′ 
                   
                 
               
               = 
               
                 
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                     ∑ 
                     
                       
                         n 
                         ′ 
                       
                       = 
                       
                         n 
                         min 
                       
                     
                     
                       n 
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                       1 
                     
                   
                   ⁢ 
                   
                     RIV 
                     
                       
                         n 
                         ′ 
                       
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                       max 
                     
                     ′′′ 
                   
                 
               
             
             , 
             
               
 
             
             ⁢ 
             
                 
             
             ⁢ 
             where 
           
         
       
       
         
           
             
                 
             
             ⁢ 
             
               
                 
                   RIV 
                   
                     
                       n 
                       ′ 
                     
                     , 
                     max 
                   
                   ′′′ 
                 
                 = 
                 
                   
                     
                       ∑ 
                       
                         
                           M 
                           0 
                         
                         = 
                         1 
                       
                       
                         
                           floor 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             N 
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                         - 
                         
                           
                             n 
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                           / 
                           
                             ( 
                             
                               
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                               - 
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                             ) 
                           
                         
                       
                     
                     ⁢ 
                     
                       CN 
                       RBG 
                     
                   
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                       ( 
                       
                         
                           n 
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                         - 
                         1 
                       
                       ) 
                     
                     ⁢ 
                     
                       M 
                       0 
                     
                   
                 
               
               , 
               
                 
                   n 
                   ′ 
                 
                 + 
                 1. 
               
             
           
         
       
     
     Naturally, many modifications can be made to the embodiments of the invention described above without departing from the scope of the present invention.