2840 Junction Ave. San Jose, CA 95134 Month Year doc: IEEE 802.11-13/xxxxr0 11ax PAR Verification Date: 2016-09-12 Authors: Name Affiliation Address Email Wilson Tsao MediaTek Inc. 2840 Junction Ave. San Jose, CA 95134 Wilson.Tsao@mediatek.com Paul Cheng Paul.Cheng@mediatek.com Russell Huang Russell.Huang@mediatek.com Tianyu Wu Tianyu.Wu@mediatek.com James Yee James.Yee@mediatek.com Yonggang Fang, ZTETX

Outline Introduction Simulation results with OBSS Next Step 36BSS with 5STA of each BSS Simulation set up Simulation result analysis Next Step

Introduction Show the performance comparison between OFDMA and legacy (11ac) devices in OBSS dense environment By sharing our simulation results, we encourage more companies to join the PAR verification effort.

Multiple BSS Simulation Set Up Topology Based on residential scenario in the 11ax simulation scenarios document [1]. There are 5 floors. Each floor has 2 rows and 10 columns of apartments. Each apartment is 10x10x3m. Only 1/3 of apartments will be using the same channel. 36 BSS with 5 STA in each BSS. There are total 180 STA. AP is at the center of the BSS. STA is randomly placed in the BSS. PHY abstraction and SINR calculation Follow 11ax evaluation methodology [2]. MAC protocol, such as CCA, backoff, trigger frame, and etc. Based on 11ax draft D0.3 [3].

Multiple BSS Simulation Set Up (cont.) Parameters Value Traffic type Full buffer UDP UL/DL traffic UDP packet size 100 Bytes MCS 5 AP/STA # of tx/rx antenna 1 Access Protocol parameters EDCA with default parameters Bandwidth 80 MHz Aggregation 64 MPDU per AMPDU RTS/CTS No OFDMA allocation Five 242-tone RUs and one 26-tone RU OBSS PD -75 dBm

Topology (1/3)

Topology (2/3)

Topology (3/3)

Simulation Result

Result Analysis DL Better PER provides gains for 11ax MU. With OBSS PD, the extra tx opportunities give more performance gain. UL UL OFDMA gets better PER but total throughput is lower. Need OBSS PD to provide more trigger frame transmission opportunities to have performance gain compared to 11ac. With better tone efficiency, smaller packet size (100Byte) and some spatial reuse (OBSS PD), 11ax OFDMA is getting about 1.6 (DL) and 1.3 (UL) performance gain over 11ac in a residential scenario.

Next Step Try more STA in each BSS. Hope to see more gain with more dense scenario.

References [1] 11-14-0980-16-00ax-simulation-scenarios.docx [2] 11-14-0571-12-00ax-evaluation-methodology.docx [3] Draft P802.11ax_D0.3.pdf