A method determining information enabling a mobile station to identify which wireless telecommunication network resources are allocated to the mobile station. The allocated resources are divided into plural non contiguous clusters of resources. The method includes: allocating resources to the mobile station; determining, from the allocated resources, plural ordered parameters each equal to a number of contiguous resources allocated or not to the mobile station; calculating, for a first parameter, a number of possibilities having a subset of resources including an amount of resources that is lower than the first parameter; calculating, for each following parameter, a number of possibilities having subsets of resources including amounts of resources respectively equal to the respective parameters having a lower rank than the following parameter and having a subset of at least one resource including an amount of resources lower than the following parameter; determining information by summing the calculated numbers.