1. 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, 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, wherein the method is executed by a base station and comprises: 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, 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 of the plural ordered parameters, within a set of possible resource allocations, a number of possible combinations of resource allocation having, in a subset corresponding to the first parameter, an amount of resources that is less than the first parameter; calculating, for each following parameter of the plural ordered parameters, within a set of possible resource allocations, a number of possible combinations of resource allocation having, for each subset corresponding to a parameter having a rank which is lower than said following parameter, an amount of resources that is equal to the parameter having a lower rank which corresponds to the subset respectively and having, in the subset corresponding to said following parameter, an amount of resources that is less than said following parameter; and determining information which enable a mobile station to identify which resources of the wireless telecommunication network are allocated to the mobile station, the information depending on a sum of all the calculated numbers, depending on a number of resources that can be allocated in the wireless telecommunication network to the mobile station, and depending on a number of clusters.