TRANSMISSION METHOD FOR TRIGGER FRAME BY A 802.11ax ACCESS-POINT

A wireless communication method in a wireless network comprising a physical access point and a plurality of stations, the method comprising the following steps, at the access point:

• selecting a transmission queue associated with an access category, the access category defining a priority for accessing the wireless network;
• sending a trigger frame to the stations using the selected transmission queue, the trigger frame reserving a transmission opportunity on at least one communication channel of the wireless network and defining resource units forming the communication channel and including a plurality of resource units that the stations can access for sending data, wherein the sending of a trigger frame is performed:
• during a point coordination function interframe space period in a case where the trigger frame is a scheduled trigger frame, and
• during a distributed coordination function interframe spacing period in a case where the trigger frame is a non-scheduled trigger frame;
• and
• receiving data from stations over the defined resource units.

A communication device in a wireless network comprising a physical access point and a plurality of stations, the communication device comprising at least one microprocessor configured for carrying out the steps of:

• selecting a transmission mode among a first and a second transmission modes, wherein access to a communication channel in the first transmission mode uses a contention mechanism with stations of the network, while access to the communication channel in the second transmission mode uses a preemption mechanism;
• sending a trigger frame to the stations using the selected transmission mode, the trigger frame reserving a transmission opportunity on at least one communication channel of the wireless network and defining resource units forming the communication channel and including a plurality of resource units that the stations can access for sending data, wherein the sending of a trigger frame is performed:
• during a point coordination function interframe space period in a case where the trigger frame is a scheduled trigger frame, and
• during a distributed coordination function interframe spacing period in a case where the trigger frame is a non-scheduled trigger frame;
• and
• receiving data from stations over the defined resource units.

A communication device in a wireless network comprising a physical access point and a plurality of stations, the communication device comprising at least one microprocessor configured for carrying out the steps of:

• selecting a transmission queue associated with an access category, the access category defining a priority for accessing the wireless network;
• sending a trigger frame to the stations using the selected transmission queue, the trigger frame reserving a transmission opportunity on at least one communication channel of the wireless network and defining resource units forming the communication channel and including a plurality of resource units that the stations can access for sending data, wherein the sending of a trigger frame is performed:
• during a point coordination function interframe space period in a case where the trigger frame is a scheduled trigger frame, and
• during a distributed coordination function interframe spacing period in a case where the trigger frame is a non-scheduled trigger frame;
• and
• receiving data from stations over the defined resource units.