Patent ID: 7782886

Claim:
A method for improving Quality of Service (QoS) in a wireless network comprising an access point and at least one mobile station, wherein the wireless network is operable in a power save mode (PSM) and supports Quality of Service, comprising: defining different access categories for transmission of frames depending on their priority; and separating a PSM queue into a plurality of sub-queues at the access point and upon receiving a request from a mobile station accommodated in the access point, searching a PSM sub-queue for frame transmission to the mobile station, wherein said separating step separates the PSM queue into a plurality of PSM sub-queues at the access point including at least a first PSM sub-queue of first priority frames and a second PSM sub-queue of second priority frames, the first PSM sub-queue being connected to a first queue for the first priority frames and the second PSM sub-queue being connected to a second queue for the second priority frames, the first and second queues being connected to a transmission buffer, and further comprising the steps of: receiving a request from a first mobile station for first priority frames, searching the first priority PSM sub-queue for first priority frames for the first mobile station and then transferring the corresponding first priority frames for the first mobile station from the first PSM sub-queue to the first queue; receiving a request from a second mobile station for first priority frames, searching the first priority PSM sub-queue for first priority frames for the second mobile station and then transferring the corresponding first priority frames for the second mobile station from the first PSM sub-queue to the first queue; and from the first queue containing both i) the first priority frames for the first mobile station transferred from the first PSM sub-queue to the first queue and ii) first priority frames for the second mobile station transferred from the first PSM sub-queue to the first queue, sending the respective corresponding first priority frames requested by the first mobile station to the first mobile station and sending the first priority frames requested by the second mobile station to the second mobile station, the first priority frames being sent through the transmission buffer.