October 2008 doc.: IEEE 802.11-08/1241r0

IEEE P802.11
Wireless LANs

Coex October Conference Call Minutes
Date: 2008-10-22
Author(s):
Name / Company / Address / Phone / email
Eldad Perahia / Intel Corporation / 2111 NE 25th Ave
Hillsboro, OR 97124 / 503-712-8081 /

1  Conference Call Times

Date / Start Time / End Time
October 22 / 11 AM Eastern Time / 1 PM Eastern Time
October 29 / 11 AM Eastern Time / 1 PM Eastern Time

2  Attendance

Participant / Oct 22 / Oct 29
Dave Bagby (Calypso) / x
John Barr (Motorola) / x
Doug Chan (Cisco) / x
Vinko Erceg (Broadcom) / x
Padam Kafle (Nokia) / x
Kirin (Ralin) / x
Bruce Kraemer (Marvell) / x
Peter Loc (Ralink) / x
Eldad Perahia (Intel) / x
Adrian Stephens / x

3  Minutes from October 22, 2008 Conference Call

3.1  Agenda

·  Coex part of call began at 12 noon ET

·  Check to see if anyone is not familiar with the IEEE patent policy http://standards.ieee.org/board/pat/pat-slideset.pdf

·  Submission by Peter Loc & Kirin

o  https://mentor.ieee.org/802.11/file/08/11-08-1238-02-000n-optional-non-802-11-radio-scans-proposal.ppt

o 

3.2  Patent Policy

Noone was unfamiliar with the IEEE patent policy. No essential patents announced

3.3  Discussion on 08/1238r2

•  CID 10025

•  Adrian: Where do you define what a non-802.11 scan is?

–  Peter: need to add that.

•  Dave: what is IDO?

–  Peter: IBSS STA

–  Bruce: IDO only applies to 5GHz

•  Doug: are you tracking 802.19? when is the appropriate time to put something like this in?

•  Adrian: what is continuous RX/TX?

–  Kirin: normal channel access, with saturated traffic

•  Adrian : It appears that 40MHz provides better performance, why switch

•  Kirin & Peter: if 20MHz BSS is detected, need to switch. Degradation occurs on switch

•  Padam: what was BW of BT? How long was switch time?

–  5-10s switch time

•  Harish: if switch is made in 1s, will see impact?

•  Dave: opposed to changes to draft

–  Analysis is tech interesting, but not relevant.

–  In ISM, devices need to accept interference

–  Political agreement in Hawaii to add compromise informative text

–  Deal was not good, since issue is still coming up again

–  Text is specific to BT, unrealistic to specify scanning for types of devices

•  Peter: will interfere with emergency voice call

–  Bruce: these are not BT SCO measurements, so do not apply to BT voice

•  John Barr: coexistence mechanism in 802.15.2 was designed for smaller amount of spectrum than 40MHz. 11n should not use so much spectrum

•  Vinko: on slide 9, would the same behaviour occur with low duty cycle dot11 traffic?

–  Kirin: maybe, would need to make measurements

•  Vinko: old BT device, new BT devices would be have AFH engineered to 40MHz

•  Adrian: we are seeing in the graph the response of a specific AFH algorithm

•  Eldad: is it true that this is not BT SCO?

–  Bruce: stereo headset is A2DP

Submission page 2 Eldad Perahia, Intel