Patent ID: 8948017
Filing Date: 2015-02-03
Classification: H04B,H04W

Abstract:
1. A method of an access point (AP) selection, performed by a station (STA), in wireless local area network system, the method comprising: receiving, from an AP, a frame including basic service set (BSS) load information, the BSS load including a multi user-multiple input multiple output (MU-MIMO) capable STA count field and a spatial stream utility field; and determining whether the STA tries to access the AP based on the BSS load information, wherein the MU-MIMO capable STA count field indicates a total number of MU-capable STAs that are currently associated with a BSS of the AP and have capabilities of MU-MIMO reception, wherein the spatial stream utility field indicates a spatial stream underutilization that is defined as a percentage of time that the AP has one or more underutilized spatial domain resources for a given busy time of a wireless medium, and wherein the spatial stream underutilization is calculated based on a maximum number of supported spatial streams supported by the AP and a number of one or more utilized spatial streams transmitted by the AP to one or more MU-capable STAs.