1. 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: 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 having a lower rank the subset corresponds to and the number of possibilities of 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 information depending on the number of resources that can be allocated in a wireless telecommunication network to the mobile station and of the number of clusters.