A method of performing coordinated transmissions, wherein multiple coordinated APs transmit simultaneously in the coordinated transmissions, said method being performed by a coordinator access point, in the following also referred to as AP, in a wireless local area network, in the following also referred to as WLAN, said method being characterized by comprising: Polling a set of coordinated APs to provide results of clear channel assessment, in the following also referred to as CCA, processes for a first coordinated transmission opportunity, in the following also referred to as TXOP, by transmitting a BQRP or BSRP frame to the set of coordinated APs; wherein BSRP stands for Buffer Status Report Poll and BQRP stands for Bandwidth Query Report Poll; receiving a status report from each AP of the coordinated APs comprised in said set of coordinated APs, wherein each of said status report specifies: • a first buffer status for uplink frames transmitted from an AP, which is sending the status report, to said coordinator AP; and an allowable bandwidth for said first coordinated TXOP, and • a specified protected period from the AP for said first coordinated TXOP, wherein a non-AP STA associated with the AP refrains from accessing transmission medium during said specified protected period; using reception of each of said status reports at said coordinator AP as an indication of a channel clear status of the AP that results from the CCA process;; and performing a coordination process, wherein said coordination process comprises: allocating channels to said coordinated APs based on received status reports; and transmitting a coordination frame to the coordinated APs, wherein the coordination frame specifies the channels that are allocated to the coordinated APs, wherein said specified protected period ends substantially at a completion of said coordination process and said coordination frame specifies a remaining TXOP duration for data transmission in said first coordinated TXOP. wherein the first coordinated TXOP expires when the coordination frame is completely transmitted. Polling a set of coordinated APs to provide results of clear channel assessment, in the following also referred to as CCA, processes for a first coordinated transmission opportunity, in the following also referred to as TXOP, by transmitting a BQRP or BSRP frame to the set of coordinated APs; wherein BSRP stands for Buffer Status Report Poll and BQRP stands for Bandwidth Query Report Poll; receiving a status report from each AP of the coordinated APs comprised in said set of coordinated APs, wherein each of said status report specifies: • a first buffer status for uplink frames transmitted from an AP, which is sending the status report, to said coordinator AP; and an allowable bandwidth for said first coordinated TXOP, and • a specified protected period from the AP for said first coordinated TXOP, wherein a non-AP STA associated with the AP refrains from accessing transmission medium during said specified protected period; • a first buffer status for uplink frames transmitted from an AP, which is sending the status report, to said coordinator AP; and an allowable bandwidth for said first coordinated TXOP, and • a specified protected period from the AP for said first coordinated TXOP, wherein a non-AP STA associated with the AP refrains from accessing transmission medium during said specified protected period; using reception of each of said status reports at said coordinator AP as an indication of a channel clear status of the AP that results from the CCA process;; and performing a coordination process, wherein said coordination process comprises: allocating channels to said coordinated APs based on received status reports; and transmitting a coordination frame to the coordinated APs, wherein the coordination frame specifies the channels that are allocated to the coordinated APs, allocating channels to said coordinated APs based on received status reports; and transmitting a coordination frame to the coordinated APs, wherein the coordination frame specifies the channels that are allocated to the coordinated APs, wherein said specified protected period ends substantially at a completion of said coordination process and said coordination frame specifies a remaining TXOP duration for data transmission in said first coordinated TXOP. wherein the first coordinated TXOP expires when the coordination frame is completely transmitted.