1. Coex Ad Hoc January London Agenda and Report
October 2006
doc.: IEEE /1560r1
January 2007
Coex Ad Hoc January London Agenda and Report
Date:
Authors:
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Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

2. October 2006
doc.: IEEE /1560r1
January 2007
Abstract
Coex Ad Hoc in January London agenda and report regarding comment resolution of LB84 (802.11n), including straw polls and motions
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

3. Overview 174 open CIDs in 06/724r45 40/20 MHz in 2.4 GHz CCA sensing
October 2006
doc.: IEEE /1560r1
January 2007
Overview
174 open CIDs in 06/724r45
40/20 MHz in 2.4 GHz
61 CIDs
CCA sensing
89 CIDs
DFS
14 CIDs
E-CSA
8 CIDs
ER/EMR
2 CIDs
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

4. Submissions Related to Comment Resolution
October 2006
doc.: IEEE /1560r1
January 2007
Submissions Related to Comment Resolution
n-misc-coex-comments (Eldad) – approved; reviewed on Jan 11th
n-removing-40-mhz-from-24-ghz (Jim, wants to go last), 40/20
(Assaf), CCA – reviewed on Jan 10th
r04 – update to split CCA into 20 and 40MHz sections; reviewed on Jan 11th
(Bjorn), DFS – reviewed on Jan 10th
r02 – approved; reviewed on Jan 11th
(Matt), 40/20 – reviewed on Jan 11th
– new changes reviewed on Jan 12th
(Peter, wants to go last), 40/20 - withdrawn
some-coex-resolutions (Srini) – reviewed on Jan 11th
Remember to update cover template with Stuart’s new address
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

5. Wed Jan 10th Straw Polls -CCA
October 2006
doc.: IEEE /1560r1
January 2007
Wed Jan 10th Straw Polls -CCA
In a 40/20 BSS, when a STA is sensing CCA and detects energy in the final DIFS of the backoff (in the primary or secondary), it will not transmit a 20MHz transmission with a 40MHz mask
Yes: 30
No: 7
Abstain: 3
Should we change text to deal with potential interference in the secondary channel?
Yes:12
No: 19
Abstain: 6
In 1901, 3rd paragraph, should we change “either transmit no PPDU or transmit a 20 MHz PPDU” to “shall not transmit a PPDU”
Yes:
No:
Abstain
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

6. Wed Jan 10th Straw Polls -CCA
October 2006
doc.: IEEE /1560r1
January 2007
Wed Jan 10th Straw Polls -CCA
Does adequately cover a 20MHz only STA?
Yes: 5
No: 14
Abstain: 13
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

7. October 2006
doc.: IEEE /1560r1
January 2007
Wed Jan 10th Notes
CID 3614 will be resolved by the combination of 06/1896 and 06/1901, will add to spreadsheet when these two documents are motioned
CID 1521 move from 06/1896 to 06/1901
EMR for CID 7365 resolved
ER for CID 9892 resolved
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

8. Thurs Jan 11th Straw Polls – 07/1940r3
October 2006
doc.: IEEE /1560r1
January 2007
Thurs Jan 11th Straw Polls – 07/1940r3
Do you support the mechanisms presented in 07/0049r0 and proposed in 07/1940r3, excluding primary and secondary overlap cases?
Yes: 34
No: 2
Abstain: 7
Would the mechanisms presented in 07/0049r0 and proposed in 07/1940r3 represent an acceptable alternative to banning 40MHz in 2.4GHz?
Yes: 26
No: 8
Abstain:10
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

9. Thurs Jan 11th Notes 06/1901r4 06/1896r2 is approved unanimously
October 2006
doc.: IEEE /1560r1
January 2007
Thurs Jan 11th Notes
06/1901r4
Found error in Table n49—PPDU format as a function of CH_BANDWIDTH(Ed: CID 3615) and CH_OFFSET parameters; definition of 20MHz upper and lower does not match Table n50. Assaf will propose correction in new version of 06/1901
06/1896r2 is approved unanimously
some-coex-resolutions
CID 2924 is removed, and will be pending resolution to GF protection discussions in the MAC Ad Hoc
CID 2924 is in MAC spreadsheet, not Coex
n-misc-coex-comments is approved unanimously
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

10. October 2006
doc.: IEEE /1560r1
January 2007
Fri Jan 12th Notes
some-coex-resolutions is approved unanimously
CID 52, 7898 resolved
CCA sensing
Restrictions to 20MHz initiation of transmission when using the 40MHz mask
Must sense secondary channel
Don’t transmit if busy at PIFS
07/1940 latest revisions in rev4
Exclusion of primary from detection of legacy
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

11. Fri Jan 12th Straw Polls – CCA sensing
October 2006
doc.: IEEE /1560r1
January 2007
Fri Jan 12th Straw Polls – CCA sensing
Do you support restrictions to 20MHz initiation of transmission when using the 40MHz mask
Must sense secondary channel
Don’t transmit if busy at PIFS
Yes: 27
No: 3
Abstain: 7
Would you support 06/1901r5 with the above restrictions?
Yes: 25
No: 2
Abstain:14
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

12. Fri Jan 12th Straw Polls -07/1940
October 2006
doc.: IEEE /1560r1
January 2007
Fri Jan 12th Straw Polls -07/1940
Do you support mandatory scanning if STA advertising capability of operating in 20/40?
Yes: 16
No: 8
Abstain: 17
Do you support only optional scanning if STA advertising capability of operating in 20/40 and is associated as power save?
Yes: 24
No: 10
Abstain: 7
Do you support mandatory scanning by the AP advertising capability of operating in 20/40?
Yes: 4
No: 32
Abstain: 8
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

13. Fri Jan 12th Straw Polls -07/1940
October 2006
doc.: IEEE /1560r1
January 2007
Fri Jan 12th Straw Polls -07/1940
Would you support the mechanism proposed in 07/1940 modified to allow only optional scanning if STA advertising capability of operating in 20/40 and while in power save mode?
Yes: 20
No: 4
Abstain: 12
Would you support the mechanisms proposed in 07/1940 if the scanning requirement modified to include fewer than the 7 channels closest and centered on the secondary channel?
Yes: 28
No: 7
Abstain: 6
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

14. Fri Jan 12th Straw Polls -07/1940
October 2006
doc.: IEEE /1560r1
January 2007
Fri Jan 12th Straw Polls -07/1940
Would the mechanisms proposed in 07/1940r4 and agreed upon modifications represent an acceptable alternative to banning 40MHz in 2.4GHz?
Power save scanning optional
No scanning around primary
Yes: 22
No: 7
Abstain: 13
Should 40MHz operation in 2.4GHz be banned?
Yes: 13
No: 10
Abstain: 16
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)

15. Pending Motions January 2007 October 2006 doc.: IEEE 802.11-06/1560r1
Eldad Perahia (Intel)
Matthew Fischer (Broadcom)