Prioritized Channel Access Schemes with Spatial Reuse Consideration

摘要

A spatial reuse prioritized channel access scheme is proposed to enhance the average throughput per station in a wireless network by optimizing spatial reuse. Spatial reuse capability (SRC) is defined as a monotonically decreasing function of co-channel interference signal strength from OBSSs. Higher spatial reuse capability can be transformed into higher data rate or less usage of airtime by using higher MCS or less interferences to OBSSs by reducing TX power. By allowing the stations that have larger spatial reuse capability to have higher probability to win channel access contention, the overall network throughput is enhanced.

主权项

1. A method comprising:
detecting a spatial reuse capability by an initiating station in a wireless communications network, wherein the spatial reuse capability is associated with a co-channel interference signal strength from overlapping basic service sets (OBSSs); performing a channel access procedure based on clear channel assessment (CCA) to gain access to a wireless channel, wherein the channel access procedure is associated with multiple CCA levels and a set of parameters; and adjusting the set of parameters based on the detected spatial reuse capability of the initiating station such that a lager spatial reuse capability station has a higher probability of accessing the wireless channel.