Methods and devices for TWT coordination in multi-AP operation

Coordinating Target Wake Times (TWT) to reduce interference between Overlapping Basic Service Sets (OBSS) of neighbouring Access Points (AP) and ensure efficient Multi-Access Point (MAP) wireless network operation (e.g. IEEE 802.11be), whereby: a first AP, which manages a first BSS, sends to a neighbouring second AP, which manages a second, overlapping BSS, a MAP coordination frame specifying a TWT schedule for the first BSS; and the second AP sends to stations (STA) of the second BSS a frame which includes an OBSS TWT element which defines second TWT Service Periods (SP) aligned in time with first TWT SPs of the first BSS. The OBSS TWT element may limit communication activity of the second BSS stations during the first TWT SPs, or forbid their access to the wireless communication medium during the second TWT SPs. The OBSS TWT element may include an OBSS EDCA (Enhanced Distributed Channel Access) Parameter Set, different from a legacy EDCA Parameter Set, and including a degraded ECWmin (EDCA Contention Window) value and/or a degraded AIFSN (Arbitration InterFrame Space Number) value. A station of a BSS managed by an AP may receive from the AP an OBSS TWT element defining TWT SPs, and switch from a legacy EDCA Parameter Set to an OBSS EDCA Parameter Set to contend for wireless medium access during one of the TWT SPs. An AP may send to the stations of the BSS it manages a legacy EDCA Parameter Set, a Multi-User (MU) EDCA Parameter Set and an OBSS EDCA Parameter Set.