Under a proposed scheme in accordance with the present disclosure, in case AP 120 enables more than one links of a plurality of supported links for a single TID for STA 110, STA 110 as a multi-link STA may select and use one or more links (e.g., a subset) of the enabled links for sending frame(s) corresponding to the TID. Moreover, in case AP 120 enables a single link of a plurality of supported links for a single TID for STA 110, STA 110 may use the single enabled link (and not other links) for sending frame(s) corresponding to the TID.

Under a proposed scheme in accordance with the present disclosure, in case STA 110 identifies or otherwise determines that there is a change with respect to its enabled link(s) for one or more TIDs in the received multi-link configuration IE, STA 110 may send to AP 120 a frame having a multi-link operation A-Control field that indicates the new operating link(s) for each of the one or more TIDs which is/are a subset of the changed enabled link(s). FIG. 3 illustrates an example scenario 300 in accordance with the present disclosure. In scenario 300, the enabled links of STA 110 for TID₁ are changed from Link 1 and Link 2 to Link 1 and Link 3. Under the proposed scheme, STA 110 may send (e.g., over Link 1) to AP 120 a frame indicating a switch in the operating links from Link 1 and Link 2 to Link 1 and Link 3 in the multi-link operation A-Control field of the frame.