Abstract:
The present invention faces the issues of communicating Machine-To-Machine Devices with Machine-To-Machine Servers for remote control of said Machine-To-Machine Devices (4 a 1-4 a 9) through public telecommunication networks and, in particular, where the number of Machine-To-Machine Devices is very high and the information transmitted for each Machine-To-Machine Device is very low in terms of volume and frequency. In order to solve this issue, the present invention provides for an enhanced architecture and associated mechanisms to allow, on the one hand, mobility management so that each Machine-To-Machine Device can be more freely moved from an area controlled by a first Gateway associated with a first Machine-To-Machine Media Handler ( 2   a ) to an area controlled by a second Gateway associated with a second Machine-To-Machine Media Handler ( 2   b ); and, on the other hand, aggregation of information streams to or from a plurality of M2M Devices using a unique communication channel between a Machine-To-Machine Media Handler and the Machine-To-Machine Server ( 3   a,    3   b ), through the public telecommunication network.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to the deployment of a Machine-To-Machine architecture and Machine-To-Machine communications over telecommunication networks. More specifically, the invention pertains to enhanced apparatuses and methods for handling Machine-To-Machine Devices and entities of the telecommunication networks with higher flexibility as well as with an easier and simpler remote control. 
       BACKGROUND 
       [0002]    The so-called Machine-To-Machine (hereinafter M2M) is a further development of telecommunication networks whereby devices connected thereto, namely M2M Devices, are managed and instructed from dedicated servers, namely M2M Servers, through different routers and gateways, which are nowadays specialized entities in the M2M market. 
         [0003]    An exemplary M2M system may be one comprising a so-called capillary network with a plurality of temperature sensors distributed amongst trees of a forest, a server connected to the capillarity network likely through a public telecommunication network, this server receiving temperature data from the sensors and processing them to determine whether any anomalous condition may be established, such as a fire, and likely connected with emergency systems. 
         [0004]    Another exemplary M2M system may be one comprising a number ‘n’ of containers distributed in a number ‘m’ of trucks, where n&gt;m and wherein each truck thus transports one or more containers, a server for tracking the current geo-position of each truck and, as assuming the server knows which container is in which truck, thus tracking the current geo-position of each container. Moreover, also in this exemplary M2M system, each container may be equipped with temperature sensors and controllers so that the server might influence the temperature of each container. 
         [0005]    Many M2M systems already exist nowadays, likely including M2M Devices of very different nature and controlling functions of different types in each M2M Server. 
         [0006]    The exponential grow of the M2M market, as quite a few analysts expect, implies for telecommunication network operators the expansion from millions of users to billions of M2M Devices. It is reasonably expected that the M2M market will cover a much wider spectrum beyond capillary networks of different type of sensors and the potential market derived thereof will increase even more. 
         [0007]    At present, the M2M service providers and some telecommunication operators are currently developing value-added and end-to-end solutions for the M2M industry. Moreover, the current approaches consist of ad-hoc end-to-end solutions for specific vertical applications. 
         [0008]    As already commented above, a basic M2M architecture includes a plurality of M2M Devices, in particular ‘sensors’, connected to each other following different patterns such as, for example, a ring-connection or a star-connection, and they all connected with a so-called M2M Gateway responsible for establishing a communication with a remote controller, namely an M2M Server, through a public network. In this situation, especially where referring to sensor networks, some of the communication patterns of M2M Devices make the direct connection towards public networks inefficient and costly. 
         [0009]    In some cases, the number of M2M Devices required to provide an M2M service is very high and the information transmitted from and to each M2M Device is quite poor in volume and frequency. In other cases, the information is only relevant in relation with the information provided by other M2M Devices, so that the establishment of a specific communication channel towards public network cannot be efficient or justifiable from a cost perspective. The M2M service providers and operators developing end-to-end M2M solutions are thus facing some difficulties that preclude an easy and flexible deployment of M2M Devices. Currently, the M2M Device is tied to a specific capillarity network and to a specific M2M Gateway due to the configuration needed for correct inter-working. 
         [0010]    The integration of M2M communications over public networks currently presents some limitations such as those exemplary disclosed in the following. 
         [0011]    A first exemplary scenario illustrating the current limitations may be a fire-detection system in a forest, wherein one may assume that thousands of cheap temperature sensors, namely M2M Devices, are deployed on the forest and communicate with a supervision centre, namely an M2M Server, via one or more M2M Gateways. This deployment presents some drawbacks: first, the M2M Gateways and the M2M Server have to know each sensor before deployment; second, the communication between the M2M Devices and the M2M Server requires specific media streams; and third, most of the information flows used to provide the measured temperatures is not relevant for the fire-detection system. 
         [0012]    A second exemplary scenario illustrating the current limitations may be a Logistic management with flexible trunks and containers. This deployment also presents some drawbacks: first, if the containers, namely M2M Devices, are wanted to establish an independent communication with a logistic control, namely M2M Server, the truck where each container is located may have an influence; second, the communication between the truck, the multiple containers transported therein, namely M2M Devices, and the M2M Server requires specific media streams; and third, some information such as the location, common for all the containers in the same truck is required to be handled independently per container basis. 
         [0013]    Currently no specific support exists in public networks to optimize these scenarios. Particularly in some cases, the number of M2M Devices required to provide any M2M service is very high and the information transmitted for each M2M Device is very low in terms of volume and frequency. Also particularly in other cases, the information is only relevant in relation with information provided by other M2M Devices. In most of these cases, establishing a specific communication channel towards a public network cannot be efficient or justifiable from cost perspective. In summary, current public networks do not have mechanisms to optimize the transmission supported by M2M Devices connected thereto based on semantic information. 
       SUMMARY 
       [0014]    The present invention is aimed to overcome, or at least to minimize, the above drawback and provides for an enhanced M2M architecture and associated mechanisms to allow, on the one hand, mobility management applicable to M2M Devices so that each M2M Device is not so closely bound to its corresponding M2M Gateway and can be more freely moved from an area controlled by a first M2M Gateway to an area controlled by a second M2M Gateway; and, on the other hand, aggregation of information streams generated by a plurality of M2M Devices using a unique communication channel through the public network towards one or more M2M Servers for remote control of the M2M Devices. Moreover, rather than necessary placing in the M2M Gateway corresponding new features disclosed by the present invention, there is provided a new entity, a so-called M2M Media Handler, to allocate these new features along with other existing M2M-related features so that conventional M2M Gateways may be kept as they are and associated with the new M2M Media Handler, or newer M2M Gateways may be implemented integrating such M2M Media Handler. 
         [0015]    Irrespective of whether the M2M Media Handler is integrated into the M2M gateway, or simply connected thereto and in close cooperation with it, each M2M Device provided for in accordance with the present invention may thus perform a sort of location updating towards a centralized M2M Registrar through the M2M Media Handler, so that the M2M Registrar can unambiguously know where each M2M Device is located and operating, whereas the M2M Media Handler may thus distribute amongst the served M2M Devices aggregated information received from a remote M2M Server controlling the M2M Devices and, in fact, controlling M2M Media Handlers, as well as the M2M Server may thus collect information from the plurality of M2M Devices that can be aggregated for its transmission towards the telecommunication networks using different patterns. 
         [0016]    In accordance with a first aspect of the present invention, there is provided a new method of handling subscription data for M2M Devices in a M2M system. This method comprises the steps of: provisioning a M2M Registrar with subscription data for a number of M2M Devices, wherein each M2M Device is assigned an M2M Device identifier, likely a profile with subscription data, and a first category indicator selected from: private, aggregated and consolidated; configuring the M2M Registrar with identifiers of one or more M2M Media Handlers in charge of handling M2M Devices, each M2M Media Handler being assigned a second category indicator selected from: private, aggregated and consolidated; registering one of more M2M Devices at the M2M Registrar, the registration of each M2M Device including the M2M Device identifier and an identifier of the M2M Media Handler in charge of handling the M2M Device; and answering a query about one or more M2M Device, query received at the M2M Registrar from at least one of: a M2M Media Handler and a M2M Server in charge of handling one or more M2M Media Handler, with a response indicating the identifier of the M2M Media Handler handling the M2M Device, and at least one of: the first category indicator which the M2M Device is assigned and the second category indicator which the M2M Media Handler is assigned. 
         [0017]    Thus, the invention makes more flexible the association between the M2M Device and the M2M Media Handler than what the conventional M2M systems achieve between the M2M Devices and the M2M Gateway since, in accordance with this first aspect of the invention, one M2M Device is allowed to change between different M2M Media Handlers even serving different capillarity networks. Besides, in accordance with this first aspect of the invention, this method allows the discovery of M2M Devices connected to the network by establishing dynamic associations with the serving M2M Media Handlers. 
         [0018]    Thanks to this aspect of the invention, the trucks in the above second exemplary scenario are allowed to act as M2M Media Handlers where the containers, namely M2M devices, are connected to; and the temperature sensors in the above first exemplary scenario can be connected to the M2M Media Handler that will make them accessible as needed without previous configuration and with support of the network. 
         [0019]    Particularly useful in this method is that the query about one or more M2M Device may indicate a given M2M Media Handler identifier, so that the corresponding response may include identifiers of those M2M Devices served by a M2M Media Handler corresponding to the given M2M Media Handler identifier. In that way, a query about an M2M Media Handler, such as a truck in the above second exemplary scenario, may obtain a response about all the M2M Devices connected to the M2M Media Handler, that is, about all the containers transported by said truck. 
         [0020]    In particular, the step of registering one of more M2M Device at the M2M Registrar may include a step of indicating the capabilities for each M2M Device. Irrespective of whether the step of registering the M2M Device includes or not the step of indicating the capabilities of the M2M Device, the step of registering in this method the one of more M2M Device at the M2M Registrar, may also include a step of downloading from the M2M Registrar towards the M2M Media Handler the first category indicator assigned to the one or more M2M Device. 
         [0021]    This method of handling subscription data for M2M Devices in a M2M system may further comprise a step of answering a query received at the M2M Registrar from a M2M Server, the query indicating a given M2M Media Handler identifier, with a response including at least one of: capabilities and second category indicator of a M2M Media Handler corresponding to the given M2M Media Handler identifier. 
         [0022]    In accordance with a second aspect of the present invention, there is provided a new method of handling operation data of M2M Devices in a M2M system. This method comprises the steps of: obtaining in at least one of a M2M Media Handler and a M2M Server, wherein the M2M Media Handler is in charge of handling M2M Devices and the M2M Server is in charge of handling M2M Media Handlers, consolidation policies to be respectively applied per each other basis; querying a M2M Registrar from at least one of the M2M Media Handler and the M2M Server about one or more M2M Device; receiving at the at least one of the M2M Media Handler and the M2M Server from the M2M Registrar information about the one or more M2M Device indicating for each M2M Device the identifier of the M2M Media Handler handling the M2M Device, and at least one of: a first category indicator which the M2M Device is assigned and a second category indicator which the M2M Media Handler is assigned, wherein first and second category indicator values are selected from: private, aggregated and consolidated. 
         [0023]    This method, depending on the first, the second, or both category indicators received in at least one of the M2M Media Handler and the M2M Server, further comprises a step of exchanging information between the M2M Media Handler and the M2M Server by using an individual communication session for each one of the one or more M2M Device, where the received first category indicator, second category indicator, or both indicate private; or a step of exchanging information between the M2M Media Handler and the M2M Server by using a communication session for all M2M Devices, where the received first category indicator, second category indicator, or both indicate aggregated; or a step of exchanging information between the M2M Media Handler and the M2M Server by using a communication session for those M2M devices where the received first category indicator, second category indicator, or both indicate consolidated, the communication session including information consolidated according to applicable consolidation policies. 
         [0024]    Thus, the invention provides for collecting information from the M2M Devices that can be aggregated for its transmission towards the telecommunication network using different patterns. Thanks to this second aspect of the invention, all the communications from/to different containers, namely M2M Devices, can be aggregated by the M2M Media Handler installed in the truck of the above second exemplary scenario. This allows providing the containers with currently so-called ‘next field communication’ (hereinafter NFC) capabilities. In addition the communication through the public network can be aggregated minimizing the related cost. Likewise, the temperature sensors of the above first exemplary scenario can communicate via the M2M Media Handler by using only NFC capabilities and minimizing the communications established through public network. Moreover, the invention thus provides for mechanisms to aggregate information from multiple M2M Devices at semantic level, that is, accordingly with the specific meaning of the information. The M2M Media Handler can logically process and aggregate the information. Therefore, also thanks to this second aspect of the invention, the temperature sensors of the above first exemplary scenario can communicate with a supervision centre, namely an M2M Server, only when some high temperature focuses are identified. Furthermore, the invention thus allows the assignation to M2M Devices of a new category based on the media handling and with types: private, aggregated or consolidated. 
         [0025]    Advantageously in this method of handling operation data of M2M Devices in a M2M system, the consolidation policies allow consolidation of one or more type of information transmissible by the one or more M2M Device by applying one or more function to said one or more type of information in order to determine whether the consolidated information is communicated by a unique communication session or by more than one communication session. In particular, the one or more function may be selected from: mathematical, statistical, thermo-dynamical, chemical, mechanical, positional, physiological, logical and social functions as well as combinations thereof. 
         [0026]    One may think in a number of physiological and chemical functions applying to the type of information transmitted by a number of sensors, namely M2M Devices located in a human body, in order to determine whether a unique communication session is to be transmitted to one medical centre, namely one M2M Server, or more than one communication sessions are to be transmitted to different health centres such as a doctor&#39;s office and a laboratory, namely more than one M2M Servers. 
         [0027]    Particularly advantageous in connection with the above method of handling subscription data for M2M Devices in accordance with the first aspect of the invention, this method of handling operation data of M2M Devices may further include a step of receiving at the M2M Media Handler an attach message for each M2M Device connected with the M2M Media Handler; and, responsive to each attach message, a step of registering the corresponding M2M Device towards a M2M Registrar, the registration of each M2M Device including the M2M Device identifier and an identifier of the M2M Media Handler. 
         [0028]    Regarding the exchange of information between the M2M Media Handler and the M2M Server, in an embodiment of the invention the step of exchanging information between the M2M Media Handler and the M2M Server may further comprise a step of collecting at the M2M Media Handler information from the M2M Devices connected thereto. Alternatively or complementary to this embodiment, in another embodiment of the invention the step of exchanging information between the M2M Media Handler and the M2M Server includes the steps of: receiving the one or more communication sessions at the M2M Media Handler, determining whether any of these communication sessions aggregates or consolidates information for more than one M2M Device, extracting from the aggregated, the consolidated, or both communication sessions individual information per M2M Device basis, and transmitting individual communication sessions corresponding to the one or more communication sessions received from the M2M Server towards the one or more M2M Device connected to the M2M Media Handler. 
         [0029]    The applicability of the two above cooperating methods requires new or enhanced M2M entities to carry out the corresponding method steps. Particularly, some method steps are performed by one of these M2M entities alone whereas other method steps require the cooperation of more than one M2M entity. For the purpose of the present invention, these M2M entities are the so-called M2M Registrar and a so-called M2M operating entity; the former being used for handling subscription data of M2M Devices in a M2M system, and the latter being enabled to act as a M2M Media Handler in charge of handling one or more M2M Device, or as a M2M Server in charge of handling one or more M2M Media Handlers in a M2M system. 
         [0030]    Thus, in accordance with a third aspect of the invention, there is provided a M2M Registrar comprising: a configuration module cooperating with a storage for being provisioned with subscription for a number of M2M Devices, wherein each M2M Device is assigned an M2M Device identifier, a first category indicator selected from: private, aggregated and consolidated, and likely a service profile with subscription data; and for being configured with identifiers of one or more M2M Media Handler in charge of handling M2M Devices, wherein each M2M Media Handler is assigned a second category indicator selected from: private, aggregated and consolidated. 
         [0031]    This M2M Registrar also comprises a processing unit in cooperation with an input unit for receiving a registration for one of more M2M Devices, the registration of each M2M Device including the M2M Device identifier and an identifier of the M2M Media Handler in charge of handling the M2M Device; and the processing unit in cooperation with the storage and with an output unit for answering a query about one or more M2M Device, query received at the M2M Registrar from at least one of: a M2M Media Handler and a M2M Server in charge of handling one or more M2M Media Handler, with a response indicating the identifier of the M2M Media Handler handling the M2M Device, and at least one of: the first category indicator which the M2M Device is assigned and the second category indicator which the M2M Media Handler is assigned. 
         [0032]    In order to carry out the advantages disclosed above with regard to the method of handling subscription data, different alternative or complementary embodiments are proposed for this M2M Registrar, as further described. 
         [0033]    In accordance with a fourth aspect of the invention, as commented above, there is provided an M2M operating entity for acting as a M2M Media Handler in charge of handling one or more M2M Devices, or as a M2M Server in charge of handling one or more M2M Media Handlers in a M2M system. This M2M operating entity includes a consolidation module for receiving consolidation policies, the consolidation policies to be applied per M2M Media Handler basis, where the operating entity acts as a M2M Server, or the consolidation policies to be applied per M2M Server basis, where the operating entity acts as a M2M Media Handler; and a first storage for storing said consolidation policies. In this respect, this first storage may be an integral part of the consolidation module or a separate storage entity combinable with other storage units in the M2M operating entity. 
         [0034]    The M2M operating entity also includes a processing unit in cooperation with an output unit for querying a M2M Registrar about one or more M2M Device; the processing unit in cooperation with an input unit for receiving from the M2M Registrar information about the one or more M2M Device indicating for each M2M Device the identifier of the M2M Media Handler handling the M2M Device, and at least one of: a first category indicator which the M2M Device is assigned and a second category indicator which the M2M Media Handler is assigned, wherein first and second category indicator values are selected from: private, aggregated and consolidated; and a second storage for storing said information received from the M2M Registrar. In this respect, this second storage may be combined with the above first storage as a unique storage, within or outside the consolidation module, or the second storage may be a separate storage entity in the M2M operating entity. 
         [0035]    In this M2M operating entity suitable for acting as a M2M Media Handler or as a M2M Server, the processing unit in cooperation with the input unit, the output unit, or with both, is arranged for exchanging information with another M2M operating entity by using, depending on the first, the second, or both received category indicators: an individual communication session for each one of the one or more M2M Device, where the received first category indicator, second category indicator, or both indicate private; or a communication session for all M2M Devices, where the received first category indicator, second category indicator, or both indicate aggregated; or a communication session for those M2M devices where the received first category indicator, second category indicator, or both indicate consolidated, the communication session including information consolidated according to applicable consolidation policies. 
         [0036]    In order to carry out the advantages disclosed above with regard to the method of handling operation data, different alternative or complementary embodiments are proposed for this M2M operating entity and further disclosed in detail. 
         [0037]    On the other hand, the invention may be practised by a computer program, in accordance with a fifth aspect of the invention, the computer program being loadable into an internal memory of a computer with input and output units as well as with a processing unit, and comprising executable code adapted to carry out the above method steps for at least one of both methods. In particular, this executable code may be recorded in a carrier readable in the computer. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0038]    The features, objects and advantages of the invention will become apparent by reading this description in conjunction with the accompanying drawings, in which: 
           [0039]      FIG. 1  illustrates a first exemplary M2M architecture with a M2M Registrar, a first M2M Server connected with a first M2M Media Handler handling one capillary network, a second M2M Server connected with a second M2M Media Handler and a third M2M Media Handler, wherein the second M2M Media Handler handles two capillary networks and the third M2M Media Handler handles just one capillary network which may be switched in order to be controlled by the second M2M Media Handler. 
           [0040]      FIG. 2  illustrates a second exemplary M2M architecture with a M2M Registrar, two M2M Servers connected with a M2M Media Handler handling two capillary networks, wherein a M2M Server communicates with M2M Devices in a capillary network with private sessions, whereas the other M2M Server communicates with M2M Devices in the other capillary network with aggregated or consolidated sessions. 
           [0041]      FIG. 3  illustrates a third exemplary M2M architecture with a M2M Registrar, two M2M Servers connected with a M2M Media Handler handling one capillary network, wherein one M2M Server communicates with some M2M Devices in the capillary network with private sessions, whereas the other M2M Server communicates with the other M2M Devices in the capillary network with aggregated sessions. 
           [0042]      FIG. 4  illustrates a fourth exemplary M2M architecture with a M2M Registrar, a M2M Server connected with a M2M Media Handler handling one capillary network, wherein the M2M Server communicates with some M2M Devices in the capillary network with private sessions, and communicates with the other M2M Devices in the capillary network with aggregated sessions. Moreover, the M2M Server communicates with a particular M2M device in the capillary network with a private session, and this particular M2M Device acts in the capillary network as a second M2M Media Handler handling three M2M Devices and considering the received private session as an aggregated session to be submitted to the three M2M Devices as private sessions. 
           [0043]      FIG. 5  illustrates a simplified view of the sequence of actions to be performed when M2M Devices initiate communications to be transmitted between a M2M Media Handler and a M2M Server as private individual sessions. 
           [0044]      FIG. 6  illustrates a simplified view of the sequence of actions to be performed when M2M Devices initiate communications to be transmitted between a M2M Media Handler and a M2M Server as an aggregated session. 
           [0045]      FIG. 7  illustrates a simplified view of the sequence of actions to be performed when M2M Devices initiate communications to be transmitted between a M2M Media Handler and a M2M Server as a consolidated session. 
           [0046]      FIG. 8  illustrates a simplified view of the sequence of actions to be performed when a M2M Server initiates communications towards M2M Devices to be transmitted though a M2M Media Handler as an aggregated session. 
           [0047]      FIG. 9  illustrates a simplified view of the sequence of actions to be performed when a M2M Server initiates communications towards M2M Devices to be transmitted though a M2M Media Handler as a consolidated session. 
           [0048]      FIG. 10  illustrates an exemplary sequence of actions to be carried out when a M2M Device attaches to a telecommunication network through a M2M Media Handler which registers the M2M Device in a M2M Registrar. 
           [0049]      FIG. 11  illustrates a simplified view of the sequence of actions to be performed when a M2M Server initiates communications towards M2M Devices to be transmitted though a M2M Media Handler as private individual sessions. 
           [0050]      FIG. 12A-12D  illustrate exemplary alternative embodiments on how the M2M Media Handler and the M2M Server might obtain consolidation policies. 
           [0051]      FIG. 13  shows basic structural elements that a M2M operating entity, such as the M2M Media Handler and the M2M Server, may include. 
           [0052]      FIG. 14  shows basic structural elements that a M2M Registrar may include. 
       
    
    
     DETAILED DESCRIPTION 
       [0053]    The following describes currently preferred embodiments of an enhanced M2M architecture and associated mechanisms to allow a more flexible mobility management of M2M Devices in different capillary networks, by dynamically binding said the M2M Devices with different M2M Media Handlers connected with, or integrated in, existing M2M Gateways, as well as to allow aggregation and consolidation of information streams generated by the M2M Devices, by using a unique communication channel between one or more M2M Servers and the different M2M Media Handlers, for traffic with origin or destination in the M2M Devices, through the public network. In particular, these mechanisms in the enhanced M2M architecture include the new method of handling subscription data for M2M Devices in a M2M system and the new method of handling operation data of M2M Devices in a M2M system, both further described in the light of the illustrating drawings. 
         [0054]    Different network scenarios, with different or same nature of capillary networks may be built up in accordance with the invention; wherein a same M2M Media Handler, such as the second M2M Media Handler  2   b  in  FIG. 2 , may be connected with more than one capillary network, such as third and fifth capillary networks  4   c  and  4   e  in  FIG. 2 , and with more than one M2M Server, such as second and third M2M Servers  3   b  and  3   c ; wherein any particular capillary network, such as the fourth capillary network  4   d  in  FIG. 1 , may be detached from one particular M2M Media Handler, such as the second M2M Media Handler  2   b  in  FIG. 1 , and attached with a new M2M Media Handler, such as the third M2M Media Handler  2   c  in  FIG. 1 ; wherein some M2M Devices in a capillary network, such as the fifth capillary network  4   e  in  FIG. 3 , may be controlled from a M2M Server, such as the third M2M Server  3   c  in  FIG. 3 , some other M2M Devices in the same capillary network may be controlled from another M2M Server, such as the fourth M2M Server  3   d  in  FIG. 3 , and all the M2M Devices communicating with respective M2M Server through a same M2M Media Handler, such as the second M2M Media Handler  2   b  in  FIG. 3 ; or wherein some M2M Devices in a capillary network, such as M2M Devices  4   a   6 , 4   a   7 , 4   a   8  of the first capillary network  4   a  in  FIG. 4 , may communicate in aggregated mode with a M2M Server, such as the first M2M Server  3   a  in  FIG. 4 , through a M2M Media Handler, such as the first M2M Media Handler  2   a  in  FIG. 4 , and some other M2M Devices in the capillary network, such as M2M Devices  4   a   3 , 4   a - 4 ,  4   a   9  of the first capillary network  4   a  in  FIG. 4 , may communicate in private mode with the M2M Server through the M2M Media Handler. Particularly, the  FIG. 4  shows a scenario wherein a M2M Device  4   a - 4  in the first capillary network  4   a  behaves, in fact, as a M2M Media Handler and is adapted for receiving communications from the M2M Media Handler  2   a  as if it were a M2M Devices and for further distributing corresponding communications to other M2M Devices, such as M2M Devices  4   a   1 ,  4   a   2 ,  4   a   5  of the capillary network  4   a.    
         [0055]    Different scenarios like the ones above, and many different combinations may appear in each scenario whereby some M2M Devices may be communicated with the M2M Server through the M2M Media Handler with private sessions, others with aggregate sessions and still others with consolidated sessions. 
         [0056]    Prior to discussing different embodiments on the handling of private, aggregated and consolidated sessions, a possible embodiment of registration of M2M Devices is worth to be discussed with reference to  FIG. 10 . 
         [0057]    As illustrated in  FIG. 10 , a M2M Device  4   a   6  aware of the M2M Media Handler  2   a  may submit an attach message during a step S- 255  to the M2M Media Handler including an identifier of the M2M Device and, optionally, its own capabilities. The M2M Media Handler receiving the attach message may assign an IP address to the M2M Device during a step S- 260 , and the M2M Media Handler submits a register message during a step S- 265  to a M2M Registrar  1  in charge of subscription data for the M2M Device. This register message includes the M2M Device identifier and an own identifier identifying the M2M Media Handler currently handling the M2M Device. Besides, the register message may also include the IP address assigned by the M2M Media Handler to the M2M Device for further identification purposes, as well as the M2M Device capabilities, if provided by the M2M Device. 
         [0058]    In an embodiment of the invention, as provisioning the M2M Registrar with subscription data for a number of M2M Devices, capabilities for one or more M2M Device may also be provided, capabilities which may be selected from: one or more physical characteristic sensor, location, configuration parameters, and combinations thereof. Where this embodiment is practised in the M2M Registrar, queries about such M2M Devices may additionally be answered with such capabilities provisioned in the M2M Registrar. 
         [0059]    Alternatively or complementary to the above embodiment, a similar achievement may be obtained where the step of registering one of more M2M Device at the M2M Registrar includes a step of indicating the capabilities for each M2M Device, capabilities which, as above, may be selected from: one or more physical characteristic sensor, location, configuration parameters, and combinations thereof. 
         [0060]    Moreover, the embodiment of provisioning M2M Device capabilities at the M2M Registrar and the embodiment of providing said capabilities from the M2M Device itself during registration are not exclusive to each other since different versions or generations of M2M Devices may coexist in the market so that some M2M Devices may provide its own capabilities whereas others are not capable of doing it and need the provision of M2M Device capabilities by provisioning means. 
         [0061]    Once the M2M Device  4   a   6  has been registered in the M2M Registrar  1 , the latter confirms the registration back to the M2M Media Handler  2   a  during a step S- 270 . This confirmation of having registered the M2M Device may optionally include a first category indicator assigned to the M2M Device at the M2M Registrar, and also optionally a second category indicator assigned to the M2M Media Handler at the M2M Registrar. These first and second category indicators may indicate whether private, aggregated or consolidated sessions are respectively supported by the M2M Device and the M2M Media Handler. 
         [0062]    Regarding different embodiments on the handling of private, aggregated and consolidated sessions depending on the different scenarios exemplary illustrated in  FIG. 1  to  FIG. 4 , the  FIG. 5  illustrates the sequence of actions to be followed where communication packets are sent from a number of M2M Devices though a M2M Media Handler in a telecommunication network towards a M2M Server. As exemplary illustrated in  FIG. 5  a first communication packet may be submitted from a first M2M Device  4   a   3  in this drawing during a step S- 105  towards a M2M Media Handler  2   a  wherein the M2M Device had previously attached, and registered through in a M2M Registrar  1  as exemplary illustrated in  FIG. 10  and explained above. The M2M Media Handler receiving the communication packet queries during a step S- 110  the M2M Registrar  1  about the M2M Device identified by an identifier included by the sender M2M Device, which in particular might be an IP address assigned during the exemplary embodiment illustrated in  FIG. 4 . 
         [0063]    In parallel with this above sequence of actions, a second M2M Device  4   a   9  in this drawing may submit a second communication packet to the M2M Media Handler  2   a  during a step S- 115 , for which the M2M Media Handler also queries the M2M Registrar  1  during a step S- 125  about the M2M Device identified by an identifier included by the sender M2M Device, which in particular might be an IP address assigned during the exemplary embodiment illustrated in  FIG. 4 , or an identifier of another nature as further commented in the light of other embodiments. During this process related to the second communication packet, or after having concluded the above actions, the M2M Registrar  1  may answer the query about the first communication packet during a step S- 120  informing that the first M2M Device is assigned a first category indicator indicating private communication session to be used for communications with the M2M Server. Further, the M2M Media Handler  2   a  may further receive during a step S- 130  from the M2M Registrar  1  as answer to the query a first category indicator for the second M2M Device also indicating private communication session to be used for communications with the M2M Server. 
         [0064]    Then, taking into account the first category indicator received for each M2M Device, as well as a second category indicator indicating its own capacity to handle private, aggregated or consolidated communication sessions, which may be configured in the M2M Media Handler or received from the M2M Registrar, the M2M Media Handler submits during a step S- 135  a private or individual communication session for the first M2M Device  4   a   3 , and another private or individual communication session during a step S- 140  for the second M2M Device  4   a   9  towards the M2M Server  3   a.    
         [0065]      FIG. 6  illustrates another embodiment of the invention with a sequence of actions to be followed where communication packets are sent from a number of M2M Devices though a M2M Media Handler in a telecommunication network towards a M2M Server. As exemplary illustrated in  FIG. 6  a first communication packet may be submitted from a third M2M Device  4   a   6  during a step S- 205  and a second communication packet may be submitted from a fourth M2M Device  4   a   7  during a step S- 220  towards a M2M Media Handler  2   a  wherein both M2M Devices had previously registered through in the M2M Registrar  1 . 
         [0066]    The M2M Media Handler, upon receiving the first and second communication packets, respectively queries during respective steps S- 210  and S- 225  the M2M Registrar  1  about each M2M Device identified by an identifier included by the sender M2M Device, which in particular might be a host identifier (hereinafter HIP). As for the previous embodiment explained with reference to  FIG. 5 , this embodiment shown in  FIG. 6  also provides for the M2M Registrar respectively answering during steps S- 215  and S- 230  each respective query, each answer informing the first category indicator that each M2M Device is assigned. Thus, the M2M Media Handler is informed during the steps S- 215  and S- 230  that the third M2M Device  4   a   6  and the fourth M2M Device  4   a   7  require an aggregated communication session to be used for communications with the M2M Server. 
         [0067]    Then, taking into account the first category indicator received for each M2M Device, as well as the second category indicator known to the M2M Media Handler and indicating its own capacity to handle private, aggregated or consolidated communication sessions, the M2M Media Handler submits during a step S- 235  an aggregated communication session for both third M2M Device  4   a   6  and fourth M2M Device  4   a   7  towards the M2M Server  3   a.    
         [0068]    The category indicator assigned to any M2M Device in the M2M Registrar may be changed at any time by provisioning a different value than the one previously assigned. Apart from this, a M2M Registrar may be configured to always provide an individual answer for each individual query received from M2M Media Handler or from a M2M Server, which is specially interesting where all individual category indicators of a number of M2M Devices are set to ‘private’; or may be configured to delay each individual answer until a plurality of queries are received that can be answered with a unique response for the plurality of queries, which is specially advantageous where all individual category indicators of a number of M2M Devices are set to ‘aggregated’ or ‘consolidated’. 
         [0069]    In this respect,  FIG. 7  shows a similar scenario as the one in  FIG. 6 , namely the third M2M Device  4   a   6  and fourth M2M Device  4   a   7  submitting communication packets to the M2M Media Handler  2   a , querying the M2M Registrar  1  and eventually submitting a communication session to the M2M Server. However, in this scenario the category indicator of both M2M Devices had changed in respect of the scenario shown in  FIG. 6 . 
         [0070]    As exemplary illustrated in  FIG. 7  a first communication packet is submitted from the third M2M Device  4   a   6  during a step S- 205  and a second communication packet is submitted from the fourth M2M Device  4   a   7  during a step S- 220  towards the M2M Media Handler  2   a  wherein both M2M Devices had previously registered through in the M2M Registrar  1 . The M2M Media Handler, upon receiving the first and second communication packets, respectively queries during respective steps S- 210  and S- 225  the M2M Registrar  1  about each M2M Device identified by the identifier included by the sender M2M Device, which in particular might be a HIP as for the scenario shown in  FIG. 6 . 
         [0071]    Under the embodiment illustrated in  FIG. 7 , the M2M Registrar  1  may answer these queries about first and second M2M Devices  4   a   6  and  4   a   7  with a unique answer message during a step S- 240  indicating the respective first category indicator for each M2M Device, which in this case is ‘consolidated’. The M2M Media Handler  2   a  receiving such first category indicators applies during a step S- 245  consolidation policies previously obtained, and further described, to the communication packets and determines that a unique communication session will carry both communication packets towards the M2M Server. Eventually, the M2M Media Handler submits the consolidated communication session during a step S- 250  towards the M2M Server  3   a.    
         [0072]    As already commented above, the consolidation policies allow consolidation of one or more type of information transmissible by the one or more M2M Device by applying one or more function to said one or more type of information in order to determine whether the consolidated information is communicated by a unique communication session or by more than one communication session. In particular, the one or more function may be selected from: mathematical, statistical, thermo-dynamical, chemical, mechanical, positional, physiological, logical and social functions as well as combinations thereof. 
         [0073]    Regarding the manner of obtaining consolidation policies in this method, different embodiments are provided for depending on the entity obtaining such consolidation policies. For instance, the step of obtaining consolidation policies at the M2M Server may include at least one step selected from: configuring the consolidation policies at the M2M Server, retrieving the consolidation policies from the M2M Registrar and retrieving the consolidation policies from the M2M Media Handler; whereas the step of obtaining consolidation policies at the M2M Media Handler may include at least one step selected from: configuring the consolidation policies at the M2M Media Handler, retrieving the consolidation policies from the M2M Registrar and retrieving the consolidation policies from the M2M Server. In this respect, exemplary embodiments illustrate in  FIG. 12A  to  FIG. 12D  how different entities may obtain consolidation policies. 
         [0074]    Thus, in a first embodiment illustrated in  FIG. 12A , the M2M Registrar  1  may respectively provide consolidation policies to the M2M Media Handler  2   a  and to the M2M Server  3   a  during respective steps S- 400  and S- 405 . The M2M Registrar might have been configured with these consolidation policies or might have been further provisioned with them from a provisioning system, what is not illustrated in this drawing. 
         [0075]    A first alternative embodiment to the previous one is illustrated in  FIG. 12B  wherein the M2M Registrar  1  may provide all consolidation policies to the M2M Media Handler  2   a  during a step S- 410 , and wherein the latter may keep its own applicable consolidation policies and may provide to the M2M Server  3   a  during a step S- 415  those consolidation policies applicable to said M2M Server. The M2M Registrar might have been configured with these consolidation policies or might have been further provisioned with them from a provisioning system. 
         [0076]    A second alternative embodiment to the above one is illustrated in  FIG. 12C  wherein the M2M Registrar  1  may provide all consolidation policies to the M2M Server  3   a  during a step S- 420 , and wherein the latter may keep its own applicable consolidation policies and may provide to the M2M Media Handler  2   a  during a step S- 425  those consolidation policies applicable to said M2M Media Handler. The M2M Registrar might have been configured with these consolidation policies or might have been further provisioned with them from a provisioning system. 
         [0077]    An exemplary fourth embodiment in respect of obtaining consolidation policies by M2M entities is illustrated in  FIG. 12D , wherein a provisioning system  6  respectively provides consolidation policies to the M2M Registrar  1  during a step S- 430 , to the M2M Media Handler  2   a  during a step S- 435 , and to the M2M Server  3   a  during a step S- 440 . 
         [0078]    In view of these embodiments illustrated in  FIG. 12A to 12D , one may conclude that other feasible embodiments not illustrated in any drawing may be derived thereof. For instance, the consolidation policies may be configured, or even provisioned by the provisioning system, on the M2M Media Handler or on the M2M Server and then transferred from the latter towards the M2M Registrar in order to be accessible therein for other entities. Moreover, different consolidation policies may be obtained at the M2M Media Handler and M2M Server, so that the M2M Registrar may further compile them to offer final policies to the parties. 
         [0079]    Back to the sequence of actions to exchange information between the M2M Media Handler and the M2M Server, and apart from the above embodiments where the M2M Media Handler initiates the submission of communication sessions towards the M2M Server, the exchange of information between the M2M Media Handler and the M2M Server may be initiated by the M2M Server as well. 
         [0080]    For instance, as illustrated in  FIG. 8 , a M2M server  3   a  wanting to submit orders, commands or queries to M2M Devices, such as the exemplary third and fourth M2M Devices  4   a   6  and  4   a   7  might be, may first of all query the M2M Registrar  1  during a step S- 150  about such M2M Devices. 
         [0081]    Where a unique query is received at the M2M Registrar asking about more than one M2M Device, a unique answer is preferably returned by the M2M Registrar during a step S- 155  indicating the first category indicator for each M2M Device in the query. As already commented above, the M2M Registrar may be configured to preferably answer each query in the same mode as received, namely on individual basis or on a plurality basis; although the M2M Registrar may also be configured to group a number of queries received in a certain time gap with q unique answer. 
         [0082]    The M2M Server  3   a  receiving in this case first category indicators indicating that the third and fourth M2M Devices require aggregated communication sessions, prepares and submits during a step S- 160  a unique aggregated communication session for said third and fourth M2M Devices towards the M2M Media Handler  2   a . The M2M Media Handler  2   a  receiving the aggregated communication session extracts the individual information per M2M Device, prepares corresponding communication packets, and respectively submits the individual communication packets to the third and fourth M2M Devices  4   a   6  and  4   a   7  during respective steps S- 165  and S- 170 . 
         [0083]    As already commented above in respect of the embodiments referring the exchange of information initiated from the M2M Media Handler, the category indicator assigned to any M2M Device in the M2M Registrar may be changed at any time by provisioning a different value as category indicator than the one previously assigned. 
         [0084]    Thus,  FIG. 9  illustrates a similar scenario to the one shown in  FIG. 8 , but where the category indicator for the M2M Devices has been previously changed to ‘consolidated’. As illustrated in  FIG. 9 , the query submitted during the step S- 150  from the M2M Server  3   a  towards the M2M Registrar  1 , querying about the third and fourth M2M Devices, may be answered from the M2M Registrar with a unique answer message during a step S- 175  indicating that both M2M Devices are assigned the value ‘consolidated’ as category indicator. 
         [0085]    The M2M Server  3   a  receiving said first category indicator per M2M Device basis applies during a step S- 180  consolidation policies previously obtained, and already commented above in respect of embodiments shown in  FIG. 12A  to  FIG. 12D , to the communication packets and determines that a unique communication session will carry both communication packets towards the M2M Media Handler  2   a.    
         [0086]    Then, taking into account the first category indicator received for each M2M Device and, optionally, a second category indicator indicating its own capacity to handle private, aggregated or consolidated communication sessions, which may be configured in the M2M Server or received from the M2M Registrar, the M2M Server submits the consolidated communication session during a step S- 185  towards the M2M Media Handler  2   a.    
         [0087]    As in the previous embodiment shown in  FIG. 8 , also under this embodiment illustrated in  FIG. 9  the M2M Media Handler  2   a  receiving the consolidated communication session extracts the individual information per M2M Device, prepares corresponding communication packets, and respectively submits the individual communication packets to the third and fourth M2M Devices  4   a   6  and  4   a   7  during respective steps S- 190  and S- 195 . 
         [0088]    In this respect, and not illustrated in any drawing, the M2M Media Handler might also apply consolidation policies to the individual M2M Devices involved in this communication to determine whether other consolidation is required or whether pure private individual information should be submitted. In particular, one of the individual M2M Devices involved in the consolidated communication received from the M2M Server might have been the M2M Device  4   a - 4 , which is adapted to act as a further M2M Media Handler for M2M Devices  4   a   1 ,  4   a   2  and  4   a   5  as illustrated in  FIG. 4 . If this were the case, the M2M Media Handler  2   a  receiving the consolidated communication and extracting the individual information per M2M Device, may further apply consolidation policies to all the individual M2M Devices and may determine that individual communication packets should be submitted to M2M Devices  4   a   6  and  4   a   7  during respective steps S- 190  and S- 195 , as illustrated in  FIG. 9  and commented above, whereas a further consolidated communication should be submitted for M2M Devices  4   a   1 ,  4   a   2 ,  4   a - 4  and  4   a   5  towards the M2M Device  4   a - 4  acting as a further M2M Media Handler in the first capillary network  4   a . Also particularly useful in this case, the M2M Device  4   a - 4  receiving such consolidated communication, whilst acting as a further M2M Media Handler for M2M Devices  4   a   1 ,  4   a   2  and  4   a   5 , may deconsolidate the consolidated communication to extract the individual information per M2M Device, determine the portion of information applicable to itself as M2M Device  4   a - 4 , and submit the individual communication packets to the M2M Devices  4   a   1 ,  4   a   2  and  4   a   5 . 
         [0089]    In another embodiment not illustrated in any drawing, the M2M Server may send consolidated communication towards the M2M Media Handler without indicating any particular M2M Device. The M2M Media Handler receiving such consolidated information may apply consolidation policies to determine what kind of information should be submitted to which M2M Device. In particular, the consolidated communication might be a software application, configuration or adaptation applicable to one or more M2M Devices as determined by the consolidation policies. 
         [0090]      FIG. 11  illustrates another embodiment of the invention wherein a M2M Server  3   a  queries a M2M Registrar  1  during a step S- 300  about more than one M2M Devices, namely about a first M2M Device  4   a   3  and about a second M2M Device  4   a   9 , and wherein these M2M Device are identified by respective IP addresses. The M2M Registrar answers the query during a step S- 305  indicating for each M2M Device the first category indicator, which in this exemplary embodiment is ‘private’ indicating that individual communication sessions are preferred. 
         [0091]    Then, taking into account the first category indicator received for each M2M Device and, optionally, a second category indicator indicating its own capacity to handle private, aggregated or consolidated communication sessions, which may be configured in the M2M Server or received from the M2M Registrar, the M2M Server submits during a step S- 310  a private or individual communication session for the first M2M Device  4   a   3 , and another private or individual communication session during a step S- 320  for the second M2M Device  4   a   9  towards the M2M Media Handler  2   a.    
         [0092]    The M2M Media Handler receiving such private or individual communication sessions eventually forwards during respective steps S- 315  and S- 325  corresponding private or individual communication session towards the first M2M Device  4   a   3  and the second M2M Device  4   a   9 . 
         [0093]    The above sequence of actions is carried out by different M2M entities enhanced to this end with new features and capabilities. In this respect, a person skilled in the art may realize that the M2M Media Handler and the M2M Server are provided with the means to perform quite similar actions and can be regarded as quite symmetrical structural elements located at edges of a telecommunication network. Bearing this in mind, the present invention provides for a M2M operating entity  5   a - 5   b , which may act as a M2M Media Handler  2   a ,  2   b ,  2   c ,  4   a - 4  in charge of handling one or more M2M Devices  4   a   1 - 4   a   9  as well as a M2M Server  3   a - 3   d  in charge of handling one or more M2M Media Handlers in a M2M system. 
         [0094]    As already commented above, and as illustrated in  FIG. 13 , this M2M operating entity may include a consolidation module  60  for receiving consolidation policies, the consolidation policies to be applied per M2M Media Handler basis, where the operating entity acts as a M2M Server, or the consolidation policies to be applied per M2M Server basis, where the operating entity acts as a M2M Media Handler; and a first storage for storing said consolidation policies. In this respect, this first storage may be an integral part of the consolidation module or a separate storage entity  10  combinable with other storage units in the M2M operating entity. 
         [0095]    The M2M operating entity  5   a  may also include a processing unit  20  in cooperation with an output unit  40  for querying a M2M Registrar  1  about one or more M2M Device. Besides, the processing unit  20  may also act in cooperation with an input unit  50  for receiving from the M2M Registrar information about the one or more M2M Device indicating for each M2M Device the identifier of the M2M Media Handler handling the M2M Device, and at least one of: a first category indicator which the M2M Device is assigned and a second category indicator which the M2M Media Handler is assigned, wherein first and second category indicator values are selected from: private, aggregated and consolidated. In this respect, the input unit  50  and the output unit  40  may be provided as separate dedicated units, or as an integral input/output unit  30  connected with the processing unit  20 . Additionally, the M2M operating entity  5   a  may also include a second storage for storing said information received from the M2M Registrar. In this respect, this second storage may be combined with the above first storage as a unique storage  10 , within or outside the consolidation module, or the second storage may be a separate storage entity in the M2M operating entity. 
         [0096]    In this M2M operating entity  5   a  suitable for acting as a M2M Media Handler or as a M2M Server, the processing unit  20  in cooperation with the input unit  50 , the output unit  40 , or with both, may be arranged for exchanging information with another M2M operating entity  5   b  by using, depending on the first, the second, or both received category indicators: an individual communication session for each one of the one or more M2M Device, where the received first category indicator, second category indicator, or both indicate private; or a communication session for all M2M Devices, where the received first category indicator, second category indicator, or both indicate aggregated; or a communication session for all M2M devices, where the received first category indicator, second category indicator, or both indicate consolidated, the communication session including information consolidated according to applicable consolidation policies. 
         [0097]    Generally speaking, where the M2M operating unit  5   a  acts as a M2M Media Handler  2   a , the M2M operating unit  5   b  is likely acting as a M2M Server  3   a , or the M2M operating unit  5   b  might as well be a M2M Device  4   a - 4  acting as another M2M Media Handler, as illustrated in  FIG. 5 . 
         [0098]    In an embodiment, the processing unit  20  may be arranged for applying one or more function included in the consolidation policies to one or more type of information transmissible by the one or more M2M Device  4   a   6 ,  4   a   7  in order to determine whether the consolidated information is communicated by a unique communication session or by more than one communication session. In this respect, the one or more function may be selected from: mathematical, statistical, thermo-dynamical, chemical, mechanical, positional, physiological, logical and social functions as well as combinations thereof. 
         [0099]    In another, the consolidation module  60  may be arranged for receiving the consolidation policies either by configuration data provisioned by a provisioning system  6 , as illustrated in  FIG. 12D , or by retrieving the consolidation policies, from the M2M Registrar  1  or from another M2M operating entity, as illustrated in  FIG. 12A-FIG .  12 C, and in cooperation with the processing unit  20  and the input and output units  30 . 
         [0100]    In a further embodiment, where the M2M operating entity  5   a  acts as a M2M Media Handler  2   a , the processing unit  20  and the input unit  50  of the M2M operating entity may be further arranged for collecting information from the M2M Devices connected thereto. Particularly useful in this case and aligned with corresponding advantageous features of the above method, the processing unit and the input unit may be further arranged for receiving an attach message from each M2M Device  4   a   6  connected with the M2M Media Handler; and, responsive to each attach message, the processing unit  20  and the output unit  40  may be further arranged for registering the corresponding M2M Device  4   a   6  towards the M2M Registrar  1 , as shown in  FIG. 10 , the registration of each M2M Device including the M2M Device identifier and an identifier of the M2M Media Handler. 
         [0101]    In a still further embodiment, where the M2M operating entity  5   a  acts as a M2M Media Handler  2   a , and wherein the input unit  50  is further arranged for receiving one or more communication sessions from another M2M operating entity  5   b  acting as a M2M Server  3   a , the processing unit  20  may be further arranged for determining whether any of these communication sessions aggregates or consolidates information for more than one M2M Device  4   a   6 ,  4   a   7 , and for extracting from the aggregated, the consolidated, or both communication sessions individual information per M2M Device basis; and the output unit  40  may be further arranged for transmitting individual communication sessions corresponding to the one or more communication sessions received from the another M2M Server  3   a ,  5   b , towards the one or more M2M Device. 
         [0102]    As also commented above, and as illustrated in  FIG. 14 , there is provided a M2M Registrar  1  comprising: a configuration module  65  cooperating with a storage  15  for being provisioned with subscription for a number of M2M Devices  4   a   1 ′ 4   a   9 , wherein each M2M Device is assigned an M2M Device identifier, a service profile with subscription data, and a first category indicator selected from: private, aggregated and consolidated; and for being configured with identifiers of one or more M2M Media Handler  2   a ,  2   b ,  2   c ,  4   a - 4  in charge of handling M2M Devices, wherein each M2M Media Handler is assigned a second category indicator selected from: private, aggregated and consolidated. 
         [0103]    The M2M Registrar  1  also comprises a processing unit  25  in cooperation with an input unit  55  for receiving a registration for one of more M2M Devices  4   a   6 , the registration of each M2M Device including the M2M Device identifier and an identifier of the M2M Media Handler  2   a  in charge of handling the M2M Device; and the processing unit in cooperation with the storage  15  and with an output unit  45  for answering a query about one or more M2M Device, query received at the M2M Registrar from at least one of: a M2M Media Handler  2   a  and a M2M Server  3   a  in charge of handling one or more M2M Media Handler, with a response indicating the identifier of the M2M Media Handler handling the M2M Device, and at least one of: the first category indicator which the M2M Device is assigned and the second category indicator which the M2M Media Handler is assigned. 
         [0104]    In an embodiment of the invention for this M2M Registrar, the processing unit  25  in cooperation with the storage  15  and with the output unit  45  may be arranged for answering a query received from at least one of a M2M Server  3   a  and a M2M Media Handler  2   a , wherein the query indicates a given M2M Media Handler identifier, with a response including at least one of: capabilities and second category indicator of a M2M Media Handler  2   a  corresponding to the given M2M Media Handler identifier, and with identifiers of those M2M Devices served by the M2M Media Handler corresponding to the given M2M Media Handler identifier. 
         [0105]    In another, the configuration module  65  cooperating with the storage  15  may be arranged for being provisioned with capabilities for each M2M Device, capabilities selected from: one or more physical characteristic sensor, location, configuration parameters, and combinations thereof. 
         [0106]    In a still another embodiment, the processing unit  25  in cooperation with the input unit  55  may be arranged for receiving, along with the registration of each M2M Device, capabilities for each M2M Device, capabilities selected from: one or more physical characteristic sensor, location, configuration parameters, and combinations thereof, and wherein the processing unit in cooperation with the storage may be arranged for storing the capabilities per M2M Device basis. 
         [0107]    In a still further embodiment, the processing unit  25  in cooperation with the output unit  45 , during the registration of each M2M Device, may be arranged for downloading towards the M2M Media Handler the first category indicator assigned to the M2M Device. 
         [0108]    The invention may also be practised by a computer program, loadable into an internal memory of a computer with input and output units as well as with a processing unit. This computer program comprises to this end executable code adapted to carry out the above method steps when running in the computer. In particular, the executable code may be recorded in a carrier readable means in a computer. 
         [0109]    The invention is described above in connection with various embodiments that are intended to be illustrative and non-restrictive. It is expected that those of ordinary skill in this art may modify these embodiments. The scope of the invention is defined by the claims in conjunction with the description and drawings, and all modifications that fall within the scope of the claims are intended to be included therein.