June 2008 IEEE P802.19-08/0018r0
IEEE P802.19 Coexistence TAG Project
Title 40MHz 802.11n Bluetooth Simulation Parameters
Date
Submitted
[June 18, 2008]
Source
Re:
[Stephen J. Shellhammer]
[Qualcomm, Inc.]
[5775 Morehouse Drive]
[San Diego, CA 92121]
[]
Abstract []
Purpose []
Voice: [(858) 658-1874]
Fax: [(858) 651-3004]
E-mail: [shellhammer@ieee.org]
Notice This document has been prepared to assist the IEEE P802.19. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.19.
Submission Page 1 Steve Shellhammer, Qualcomm, Inc.

June 2008 IEEE P802.19-08/0018r0
This document summarizes the Simulation Parameters for evaluating the impact on a 40MHz version of 802.11n Bluetooth.
The simulation is intended to a simple simulation so as to be able to obtain results in a timely manner.
This simulation consists of two networks: 802.11n and Bluetooth. Each network contains two stations. In the case of 802.11n there is an Access Point and a client station. For Bluetooth the two stations consist of a Master and a Slave.
The two Bluetooth devices are each 1 meter from the 802.11n client. The simulation will assume free space path loss for the link between the 802.11n client and each of the two Bluetooth devices. The 802.11n Access Point is assumed to be far enough from the Bluetooth devices such that it does not cause significant interference to the Bluetooth devices. So the 802.11n interference is caused by the 802.11n client station.
The 802.11n client station transmits at 20 dBm EIRP. The Bluetooth devices are each receiving the Bluetooth signal at 6 dB above the Bluetooth receiver sensitivity. This power represents a reasonable margin so that without any interference the Bluetooth link should be operating robustly.
The 802.11n traffic model is a file transfer from the 802.11n client to the 802.11n Access Point.
This represents a worst case condition in which the 802.11n client is transmitting at a high duty cycle. Other traffic models could be included later.
Submission Page 2 Steve Shellhammer, Qualcomm, Inc.

June 2008 IEEE P802.19-08/0018r0
The Bluetooth devices are transmitting enhanced SCO (eSCO) traffic which is representative of voice traffic between a cell phone and a Bluetooth headset. Additionally standard SCO will also be modeled, since not all headset include eSCO.
Two simulations shall be included. In the first simulation the 802.11n station will be operating in 20-MHz mode. In the second simulation the 802.11n station will be operating in 40-Mhz mode. This allows a comparison of the effect of the two different bandwidths on the Bluetooth network.
The simulation assumes that AHF is disabled. In the future if a representative AFH algorithm can be obtained, simulations with AFH enabled could also be included.
Several metrics will be used to evaluate the impact of 802.11n interference on the Bluetooth network. The first metric is the raw Bluetooth packet error rate (PER), without retransmission.
This is useful to represent the impact on a standard Bluetooth SCO link. The second metric is the packet error rate after retransmission (PERaR), which measures the packet error rate after the eSCO retransmissions.
Coexistence Metric Description
PER
PERaR
Bluetooth packet error rate. This metric does not include retransmission. It is indicative of the SCO audio quality
Bluetooth packet error rate after eSCO retransmissions.
This is indicative of eSCO audio quality
Table 1: Coexistence Metrics
Submission Page 3 Steve Shellhammer, Qualcomm, Inc.