Complexity of OBSS July 2008 Date: 2008-07-15 Authors: September 2006 doc.: IEEE 802.11-06/1458r0 July 2008 Complexity of OBSS Date: 2008-07-15 Authors: Hart et al (Cisco Systems et al) Joonsuk Kim, Broadcom Corp.

OBSS matters. OBSS is not just two APs overlapping September 2006 doc.: IEEE 802.11-06/1458r0 July 2008 OBSS matters. OBSS is not just two APs overlapping PCF, HCCA have struggled in the marketplace Partly because of fragile behavior in corner cases Under-designed and therefore irrelevant OBSS in 2.4 GHz is routine OBSS at 5 GHz is much less likely, but still matters with: 40 MHz operation DFS not implemented or certified (e.g. IBSS) Poor channel selection Moving APs Nearby radar Hart et al (Cisco Systems et al) Joonsuk Kim, Broadcom Corp.

OBSS is complicated – one STA can overlap multiple BSSs September 2006 doc.: IEEE 802.11-06/1458r0 July 2008 OBSS is complicated – one STA can overlap multiple BSSs Hart et al (Cisco Systems et al) Joonsuk Kim, Broadcom Corp.