Constrained Beam Selection Scheme for WLAN systems

Abstract

This letter proposes a constrained beam selection scheme for wireless local area network (WLAN) systems and elucidates its effectiveness by a ray-trace simulation in an indoor environment. In the proposed selection scheme, a control engine connected to multiple access points (APs) first winnows down the beam pattern candidate of each AP based on the received signal strength indicators (RSSIs) between AP-stations (STAs) and between AP-AP as inter-cell interference power. Then, each AP communicates with own desired STAs using the beam pattern selected so that the RSSI at each desired-STA is maximized under each constrained candidate. Computer simulation results clearly show that the proposed selection scheme can offer higher the signal to interference and noise ratio (SINR) than the conventional approach in the targeted area.