Abstract: The network allows communications at various bit rates, with signals transmitted in successive frames each divided into elementary timeslots which can be used for different communications. A frequency band is allocated to communications between base stations of a group of cells and mobile stations. This band is subdivided into blocks of width 2M−1×B0, where B0 is a predefined spectral width and M an integer greater than 1 chosen as a function of a maximum communication bit rate. Each of the blocks is divided into carriers of width 2m(i)−1×B0, m(i) being an integer dependent on the relevant block such that 1≦m(i)≦M. The partition of the blocks and of the carriers within the allocated frequency band is identical for all the cells of the group. To support a communication in one of the cells, a logic channel is selected, defined, depending on the bit rate required, as one or more timeslots on one of the carriers.