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, said resources being subcarriers or resource blocks in the frequency domain, 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 is executed by the base station and comprises the steps of: - allocating resources to the mobile station, the allocated resources dividing the set of resources into subsets of resources, - determining, based upon the allocated resources, plural ordered parameters (M 0 to Mk), each parameter representing 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 (Mo), within a set of possible resource allocations, a number (So(Mo)) of possible resource allocation having in a subset corresponding to the first parameter (Mo), an amount of resources that is less than the first parameter (Mo), - calculating, for each following parameter (M k), within a set of possible resource allocations, a number (S k (M 0...M k)) of possible resource allocation having for each subset corresponding to a parameter (M 0 to M k-1) having a rank which is lower than said following parameter (M k), an amount of resources that is equal to the parameter (M 0 to M k-1) having a lower rank which corresponds to the subset respectively and having in the subset corresponding to said following parameter (M k), an amount of resources that is less than said following parameter (M k), - determining (S706, S707, Fig. 4) information (RIVn, Fig. 4) which enable a mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station, from a sum of all the calculated numbers, the information depending on a number of resources (N RBG) that can be allocated in the wireless telecommunication network to the mobile station and depending on a number (n) of clusters, - transmitting the determined information (RIVn, Fig. 4) to the mobile station. - allocating resources to the mobile station, the allocated resources dividing the set of resources into subsets of resources, - determining, based upon the allocated resources, plural ordered parameters (M 0 to Mk), each parameter representing 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 (Mo), within a set of possible resource allocations, a number (So(Mo)) of possible resource allocation having in a subset corresponding to the first parameter (Mo), an amount of resources that is less than the first parameter (Mo), - calculating, for each following parameter (M k), within a set of possible resource allocations, a number (S k (M 0...M k)) of possible resource allocation having for each subset corresponding to a parameter (M 0 to M k-1) having a rank which is lower than said following parameter (M k), an amount of resources that is equal to the parameter (M 0 to M k-1) having a lower rank which corresponds to the subset respectively and having in the subset corresponding to said following parameter (M k), an amount of resources that is less than said following parameter (M k), - determining (S706, S707, Fig. 4) information (RIVn, Fig. 4) which enable a mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station, from a sum of all the calculated numbers, the information depending on a number of resources (N RBG) that can be allocated in the wireless telecommunication network to the mobile station and depending on a number (n) of clusters, - transmitting the determined information (RIVn, Fig. 4) to the mobile station.