A method comprising: performing uplink and downlink timing synchronization between a first access point, hereinafter AP, serving a first basic service set, hereinafter BSS, and a second AP serving a second BSS in a wireless communication network; dividing wireless stations in the first BSS into a first group and a second group, wherein transmissions by the wireless stations in the first group do not interfere with the second AP reception, and wherein transmissions by the wireless station in the second group interfere with the second AP reception; and coordinating application of a interference mitigation scheme between the first BSS and the second BSS for the wireless stations in the second group of the first BSS and a second group of the second BSS to communicate according to the interference mitigation scheme to mitigate interference between the first BSS and the second BSS, wherein transmissions by the wireless stations in the second group of the second BSS interfere with the first AP reception; wherein the first AP is a timing slave and the second AP is a timing master, wherein the first AP learns the second AP timing information and synchronizes with the second AP at end of a downlink PPDU, hereinafter DL PPDU, or an uplink PPDU, hereinafter UL PPDU, and the first AP learns the second AP DL PPDU transmission time and UL PPDU transmission time, and wherein the first AP follows the same DL transmission time and indicates the same UL PDDU transmission time to the stations in the first BSS via a trigger frame, characterized in that the first AP aggregates the trigger information for UL multi-user transmission with an UL ACK frame or a DL data frame. performing uplink and downlink timing synchronization between a first access point, hereinafter AP, serving a first basic service set, hereinafter BSS, and a second AP serving a second BSS in a wireless communication network; dividing wireless stations in the first BSS into a first group and a second group, wherein transmissions by the wireless stations in the first group do not interfere with the second AP reception, and wherein transmissions by the wireless station in the second group interfere with the second AP reception; and coordinating application of a interference mitigation scheme between the first BSS and the second BSS for the wireless stations in the second group of the first BSS and a second group of the second BSS to communicate according to the interference mitigation scheme to mitigate interference between the first BSS and the second BSS, wherein transmissions by the wireless stations in the second group of the second BSS interfere with the first AP reception; wherein the first AP is a timing slave and the second AP is a timing master, wherein the first AP learns the second AP timing information and synchronizes with the second AP at end of a downlink PPDU, hereinafter DL PPDU, or an uplink PPDU, hereinafter UL PPDU, and the first AP learns the second AP DL PPDU transmission time and UL PPDU transmission time, and wherein the first AP follows the same DL transmission time and indicates the same UL PDDU transmission time to the stations in the first BSS via a trigger frame, characterized in that the first AP aggregates the trigger information for UL multi-user transmission with an UL ACK frame or a DL data frame.