1. 2840 Junction Ave. San Jose, CA 95134
Month Year
doc: IEEE /xxxxr0
11ax PAR Verification
Date:
Authors:
Name
Affiliation
Address
Wilson Tsao
MediaTek Inc.
2840 Junction Ave. San Jose, CA 95134
Paul Cheng
Russell Huang
Tianyu Wu
James Yee
Yonggang Fang, ZTETX

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

3. 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.

4. 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.
Follow 11ax draft D0.3 [3].

5. 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

6. Topology (1/3)

7. Topology (2/3)

8. Topology (3/3)

9. Simulation Result

10. 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.

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

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