Method and system of operating a multi-user system

摘要

A method and system is disclosed for grouping the multiple stations connected to an access point (AP). The system and method comprise sending a sounding packet to a plurality of stations, wherein the stations may be all or part of the stations that are located within the range of the AP. The stations that receive the sounding packets respond to the AP, and the AP determines the channel state information (CSI) from the responses. According to the CSI, the AP divides the multiple stations into several groups. According to an embodiment of the present invention, a confirmation step is performed to each group of stations, respectively. The AP sends a second sounding packet to each group of stations, and verifies the CSI between each station group by group. Therefore, the method and system provides for monitoring the validation of each group by periodically sending sounding packets to each group.

主权项

1. A method of operation in a multi-user system comprising:
sending a first sounding request to a plurality of stations by an access point (AP), wherein channel state information from each responding station is gathered by the AP and is used to divide the plurality of stations into at least one group; sending a second sounding request by the AP to the at least one group, wherein channel state information from each responding station in the at least one group is gathered by the AP and is used to calculate a set of precoding matrixes that minimize interference between the plurality of stations in the at least one group; and sending a third sounding request to the plurality of stations in the at least one group using a precoded sounding to confirm final membership of the plurality of stations in the at least one group.