Considering individual sequences T1, . . . , TK over N successive frames for performing K individual transmissions, one time and frequency resource is allocated to each individual transmission per frame. The time and frequency resources can be represented by a grid with time resources on one dimension and frequency resources on another dimension. A managing device: computes a figure of merit G(A, T1, . . . , TK) for each possible set of the individual sequences T1, . . . , TK over the N successive frames on which respective frequency hopping sequences [A1, . . . , AN]=A apply, the figure of merit G(A, T1, . . . , TK) being representative of transmission robustness to interference and/or noise and/or path loss, and being determined under a constraint such that the frequency hopping sequences A1, . . . , AN are defined among a predefined set of allowable frequency hopping sequences which is a subset of all the time and frequency resources sequences made possible by said grid; and selects the set of individual s
