Patent ID: 11889557
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A wireless communication method in which one wireless LAN access point (which is hereinafter referred to as an “AP”) and a plurality of wireless LAN stations (each of which is hereinafter referred to as an “STA”) are connected to each other, and in which an uplink data frame is simultaneously transmitted from each of the plurality of STAs to the AP in a multiple access scheme, comprising:
collecting station information from the plurality of STAs, where the station information is used for selection of STAs performing the simultaneous transmission and for control of the simultaneous transmission, said station information being traffic information in each STA in the plurality of STAs, or a received power from each STA in the plurality of STAs, or a channel status from each STA in the plurality of STAs;
selecting among said plurality of STAs a combination of STAs performing the simultaneous transmission based on the station information;
transmitting a downlink frame via a downlink transmission queue in a set of downlink transmission queues, where each downlink transmission queue in the set of downlink transmission queues corresponds to a different category;
inserting a trigger frame into a trigger transmission queue;
transmitting to each of the STAs, which simultaneously transmits the uplink data frame, a trigger frame via the trigger transmission queue, where the trigger frame instructs to perform the simultaneous transmission and includes information necessary for the control of the simultaneous transmission; and
acquiring, by a given CSMA/CA control unit in a set of CSMA?CA control units, a channel access right for transmitting the trigger frame or a downlink data frame from the AP to each of the STAs, where each CSMA/CA control unit corresponds to a downlink transmission queue in the set of downlink transmission queues;
selecting, a given selection unit in a set of selection units, a downlink frame or a trigger frame to be transmitted using the channel access rights, where each selection unit corresponds to a downlink transmission queue in the set of downlink transmission queues; and
transmitting the selected downlink data frame or the selected trigger frame using the channel access right acquired by the common CSMA/CA control unit.