Coex Ad Hoc May Montreal Agenda and Report July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Coex Ad Hoc May Montreal Agenda and Report Date: 2007-07-16 Authors: Notice: This document has been prepared to assist IEEE 802.11. 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 grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <stuart@ok-brit.com> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <patcom@ieee.org>. Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Abstract Coex Ad Hoc in July San Francisco agenda and report regarding comment resolution of LB97 (802.11n), including straw polls Eldad Perahia (Intel) Eldad Perahia (Intel)

Overview Submissions Comment Resolution July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Overview Submissions Comment Resolution Latest version of spreadsheet: 07/0339r11 Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Highlights of the IEEE-SA Standards Board Bylaws on Patents in Standards Participants have a duty to tell the IEEE if they know (based on personal awareness) of potentially Essential Patent Claims they or their employer own Participants are encouraged to tell the IEEE if they know of potentially Essential Patent Claims owned by others This encouragement is particularly strong as the third party may not be a participant in the standards process Working Group required to request assurance Early assurance is encouraged Terms of assurance shall be either: Reasonable and nondiscriminatory, with or without monetary compensation; or, A statement of non-assertion of patent rights Assurances Shall be provided on the IEEE-SA Standards Board approved LOA form May optionally include not-to-exceed rates, terms, and conditions Shall not be circumvented through sale or transfer of patents Shall be brought to the attention of any future assignees or transferees Shall apply to Affiliates unless explicitly excluded Are irrevocable once submitted and accepted Shall be supplemented if Submitter becomes aware of other potential Essential Patent Claims A “Blanket Letter of Assurance” may be provided at the option of the patent holder A patent holder has no duty to perform a patent search Full policy available at http://standards.ieee.org/guides/bylaws/sect6-7.html#6 1 Eldad Perahia (Intel) Eldad Perahia (Intel)

IEEE-SA Standards Board Bylaws on Patents in Standards July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 IEEE-SA Standards Board Bylaws on Patents in Standards 6.2 Policy IEEE standards may be drafted in terms that include the use of Essential Patent Claims. If the IEEE receives notice that a [Proposed] IEEE Standard may require the use of a potential Essential Patent Claim, the IEEE shall request licensing assurance, on the IEEE Standards Board approved Letter of Assurance form, from the patent holder or patent applicant. The IEEE shall request this assurance without coercion. The Submitter of the Letter of Assurance may, after Reasonable and Good Faith Inquiry, indicate it is not aware of any Patent Claims that the Submitter may own, control, or have the ability to license that might be or become Essential Patent Claims. If the patent holder or patent applicant provides an assurance, it should do so as soon as reasonably feasible in the standards development process. This assurance shall be provided prior to the Standards Board’s approval of the standard. This assurance shall be provided prior to a reaffirmation if the IEEE receives notice of a potential Essential Patent Claim after the standard’s approval or a prior reaffirmation. An asserted potential Essential Patent Claim for which an assurance cannot be obtained (e.g., a Letter of Assurance is not provided or the Letter of Assurance indicates that assurance is not being provided) shall be referred to the Patent Committee. A Letter of Assurance shall be either: a) A general disclaimer to the effect that the Submitter without conditions will not enforce any present or future Essential Patent Claims against any person or entity making, using, selling, offering to sell, importing, distributing, or implementing a compliant implementation of the standard; or b) A statement that a license for a compliant implementation of the standard will be made available to an unrestricted number of applicants on a worldwide basis without compensation or under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair discrimination. At its sole option, the Submitter may provide with its assurance any of the following: (i) a not-to-exceed license fee or rate commitment, (ii) a sample license agreement, or (iii) one or more material licensing terms. 2 Eldad Perahia (Intel) Eldad Perahia (Intel)

IEEE-SA Standards Board Bylaws on Patents in Standards July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 IEEE-SA Standards Board Bylaws on Patents in Standards Copies of an Accepted LOA may be provided to the working group, but shall not be discussed, at any standards working group meeting. The Submitter and all Affiliates (other than those Affiliates excluded in a Letter of Assurance) shall not assign or otherwise transfer any rights in any Essential Patent Claims that are the subject of such Letter of Assurance that they hold, control, or have the ability to license with the intent of circumventing or negating any of the representations and commitments made in such Letter of Assurance. The Submitter of a Letter of Assurance shall agree (a) to provide notice of a Letter of Assurance either through a Statement of Encumbrance or by binding any assignee or transferee to the terms of such Letter of Assurance; and (b) to require its assignee or transferee to (i) agree to similarly provide such notice and (ii) to bind its assignees or transferees to agree to provide such notice as described in (a) and (b). This assurance shall apply to the Submitter and its Affiliates except those Affiliates the Submitter specifically excludes on the relevant Letter of Assurance. If, after providing a Letter of Assurance to the IEEE, the Submitter becomes aware of additional Patent Claim(s) not already covered by an existing Letter of Assurance that are owned, controlled, or licensable by the Submitter that may be or become Essential Patent Claim(s) for the same IEEE Standard but are not the subject of an existing Letter of Assurance, then such Submitter shall submit a Letter of Assurance stating its position regarding enforcement or licensing of such Patent Claims. For the purposes of this commitment, the Submitter is deemed to be aware if any of the following individuals who are from, employed by, or otherwise represent the Submitter have personal knowledge of additional potential Essential Patent Claims, owned or controlled by the Submitter, related to a [Proposed] IEEE Standard and not already the subject of a previously submitted Letter of Assurance: (a) past or present participants in the development of the [Proposed] IEEE Standard, or (b) the individual executing the previously submitted Letter of Assurance. 3 Eldad Perahia (Intel) Eldad Perahia (Intel)

IEEE-SA Standards Board Bylaws on Patents in Standards July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 IEEE-SA Standards Board Bylaws on Patents in Standards The assurance is irrevocable once submitted and accepted and shall apply, at a minimum, from the date of the standard's approval to the date of the standard's withdrawal. The IEEE is not responsible for identifying Essential Patent Claims for which a license may be required, for conducting inquiries into the legal validity or scope of those Patent Claims, or for determining whether any licensing terms or conditions are reasonable or non-discriminatory. Nothing in this policy shall be interpreted as giving rise to a duty to conduct a patent search. No license is implied by the submission of a Letter of Assurance. In order for IEEE’s patent policy to function efficiently, individuals participating in the standards development process: (a) shall inform the IEEE (or cause the IEEE to be informed) of the holder of any potential Essential Patent Claims of which they are personally aware and that are not already the subject of an existing Letter of Assurance, owned or controlled by the participant or the entity the participant is from, employed by, or otherwise represents; and (b) should inform the IEEE (or cause the IEEE to be informed) of any other holders of such potential Essential Patent Claims that are not already the subject of an existing Letter of Assurance. 4 Eldad Perahia (Intel) Eldad Perahia (Intel)

Other Guidelines for IEEE WG Meetings July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Other Guidelines for IEEE WG Meetings All IEEE-SA standards meetings shall be conducted in compliance with all applicable laws, including antitrust and competition laws. Don’t discuss the interpretation, validity, or essentiality of patents/patent claims. Don’t discuss specific license rates, terms, or conditions. Relative costs, including licensing costs of essential patent claims, of different technical approaches may be discussed in standards development meetings. Technical considerations remain primary focus Don’t discuss fixing product prices, allocation of customers, or dividing sales markets. Don’t discuss the status or substance of ongoing or threatened litigation. Don’t be silent if inappropriate topics are discussed… do formally object. --------------------------------------------------------------- If you have questions, contact the IEEE-SA Standards Board Patent Committee Administrator at patcom@ieee.org or visit http://standards.ieee.org/board/pat/index.html See IEEE-SA Standards Board Operations Manual, clause 5.3.10 and “Promoting Competition and Innovation: What You Need to Know about the IEEE Standards Association's Antitrust and Competition Policy” for more details. This slide set is available at http://standards.ieee.org/board/pat/pat-slideset.ppt 5 Eldad Perahia (Intel) Eldad Perahia (Intel)

Further Information July 2007 July 2007 doc.: IEEE 802.11-07/2090r0 IEEE Code of Ethics http://www.ieee.org/web/membership/ethics/code_ethics.html IEEE-SA Affiliation FAQ http://standards.ieee.org/faqs/affiliationFAQ.html IEEE-SA Antitrust & Competition Policy http://standards.ieee.org/resources/antitrust-guidelines.pdf IEEE-SA LETTER OF ASSURANCE (LOA) FORM http://standards.ieee.org/board/pat/loa.pdf IEEE-SA STANDARDS BOARD PATENT COMMITTEE (PATCOM) INFORMATION http://standards.ieee.org/board/pat/index.html IEEE-SA PATENT FAQ http://standards.ieee.org/board/pat/faq.pdf IEEE 802 LAN / MAN STANDARDS COMMITTEE (LMSC) POLICIES & PROCEDURES http://grouper.ieee.org/groups/802/policies-and-procedures.pdf IEEE 802.11 WLANS WORKING GROUP POLICIES & PROCEDURES http://www.ieee802.org/11/DocFiles/06/11-06-0812-03-0000-802-11-policies-and-proceedures.htm Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Rules / Procedure As a general rule, we will NOT be reviewing CIDs on a one by one basis Resolution of comments will in most cases be based on submissions Coex Ad Hoc chair will bring resolutions which passed by 75% or more for motion in TGn, with affirmation of Ad Hoc Votes between 50% - 75% may be brought to TGn for further discussion and votes to break deadlock Eldad Perahia (Intel) Eldad Perahia (Intel)

Subgroups (1/2) July 2007 July 2007 doc.: IEEE 802.11-07/2090r0 40-20 in 2.4GHz 243 comments 9.20.4 Matt F. PCO 31 comments 11.16 Tomo L-SIG TXOP 26 comments 9.13.4, 9.13.5 Yuichi ECSA Clause 7 1 comment Bjorn DFS & channel selection 14 comments 11.9.7, 11.9.8 Bjorn & Solomon & Matt F. Eldad Perahia (Intel) Eldad Perahia (Intel)

Subgroups (2/2) July 2007 July 2007 doc.: IEEE 802.11-07/2090r0 Channel switching 36 comments 9.20.4 (not include 2.4 GHz) Solomon CCA sensing 5 comments 9.20.2, 9.20.3 Assaf 40/20 24 comments Miscellaneous 40/20 CIDs in 7.3.2.50, 9.20 Vinko Protection mechanisms 69 comments 7.3.2.50, 9.13 Bjorn DSSS-CCK 9 comments 11.15 Need new volunteer Eldad Perahia (Intel) Eldad Perahia (Intel)

Submissions Related to Comment Resolution July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Submissions Related to Comment Resolution Matt F. 11-07-2020-04-000n-lb97-cid-2582-bss-width-switching.doc 11-07-0614-07-000n-lb97-cid-75-20-40-coex.doc 11-07-2021-01-000n-lb97-20-40-coex-2-4ghz.ppt 11-07-0591-07-000n-LB97-CID-1832-Operating-Mode-Bits.doc Vinko 11-07-611 Solomon 11-07-2054-00-000n-tgn-lb97-coex-dfs-ch-sel.doc 11-07-2055-00-000n-tgn-lb97-coex-ch-switching.doc Yuichi Continuation of 11-07-734 (half done) Tomoko Bjorn 07/2098r0: 5 remaining comments from 07/560r1 & EMR Assaf Richard 07/2100 (L-Length error) Red indicates completed submissions Eldad Perahia (Intel) Eldad Perahia (Intel)

EMRs CID 1737 CID 43 July 2007 July 2007 doc.: IEEE 802.11-07/2090r0 Eldad Perahia (Intel) Eldad Perahia (Intel)

Wed July 11 Agenda Submissions EMR doc.: IEEE 802.11-07/2090r0 July 2007 Wed July 11 Agenda Submissions 11-07-0591-07-000n-LB97-CID-1832-Operating-Mode-Bits.doc 11-07/0734r2 EMR CID 1737 to be handled by Yuichi as part of 07/734 Eldad Perahia (Intel) Eldad Perahia (Intel)

Minutes for Wed July 11 11-07-0591-07 doc.: IEEE 802.11-07/2090r0 July 2007 Minutes for Wed July 11 11-07-0591-07 Set to 0: no non-HT STAs detected; Pure HT BSS (all are 20/40, or BSS is 20) Set to 1: OBSS non-HT STA detected; all members of BSS are HT STAs Set to 2: no non-HT STAs detected; 20/40 BSS w/ 20 HT-STA members Set to 3: There are members of BSS that are non-HT STA Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 11-07-734r2 CID 2250: in proposed resolution mention normative vs informative. CID 2251: counter with “The TXOP holder should transmit a CF_End frame in a basic rate non-HT PPDU starting a SIFS after the L-SIG TXOP protected period, except during the 40 MHz phase of PCO operation (see 11.16).” CID 2252: reject, context sensitive, different cases of CF-ED, A-MPDU vs L-SIG TXOP CID 3322: counter, align text (including timing requirement) with 9.13.6.2 CID 2254: proposed change wants reference RXVECTOR. Currently there is no indication in RXVECTOR of a validity of L-SIG. Needs to be added to RXVECTOR, and the CID counter with modified resolution. Make as a separate submission. CID 2256: reassign to Protection Mechanism group CID 2259: change resolution to: Counter, resolved by CID 1852 per text in D2.04 Stopped at CID 2259 Eldad Perahia (Intel) Eldad Perahia (Intel)

Thursday July 12 Agenda Submissions doc.: IEEE 802.11-07/2090r0 July 2007 Thursday July 12 Agenda Submissions 11-07-0614-07-000n-lb97-cid-75-20-40-coex.doc 11-07-2021-01-000n-lb97-20-40-coex-2-4ghz.ppt Eldad Perahia (Intel) Eldad Perahia (Intel)

Minutes for Thursday July 12 doc.: IEEE 802.11-07/2090r0 July 2007 Minutes for Thursday July 12 11-07-2021-01-000n-lb97-20-40-coex-2-4ghz.ppt Overview of 07/614 Specific definitions moved from clause 3 to clause 9.20.1 New “public” action frame, force Class 1 Discussion of data scanning (versus beacon scanning) Data scanning allows for use of 40MHz if there is a legacy beacon but no data; beacon scanning is much more conservative in terms of not using 40MHz Data scanning covers potential overlap of STA with OBSS STA where beacons are not heard will have side discussion Discussion on active scan dwell time Dwell time allows for receipt of multiple responses Eldad Perahia (Intel) Eldad Perahia (Intel)

11-07-614r7 Need to update resolutions in CID list July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 11-07-614r7 Need to update resolutions in CID list No interest in individualized STA OBSS scanning per control of the AP Discussion on OBSS Scan RSSI Threshold Need for threshold? Range of MIB? Intention was to ignore 1 or 2 Mbps beacons which have much further range than actual BSS Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 11-07-614r7, continued Strawpoll Do you support the inclusion of an RSSI Threshold for OBSS Scan operations? Y:11 N:6 A:4 Reasons for no vote Too many thresholds If detected should be reported, threshold can be abused Threshold range is too wide In STA 19 definition, do we need restriction to 25 & 40 channel width? There are only 25 & 40 channel in 2.4 GHz in Annex J. Why 1 TU for the resolution for countdown timer? Needs to be less than scan interval 40 MHz affected channel range equation No objection to 25 MHz span on either side; allows 40 on channel 1&5 and legacy on 9,10,or 11 Eldad Perahia (Intel) Eldad Perahia (Intel)

11-07-614r7, continued MIB attributes July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 11-07-614r7, continued MIB attributes Scan interval (dot11BSSWidthTriggerScanInterval) Maximum of 60 min, default of 30 min in r7 Change maximum value to 30 min Change default value to 3 min (straw poll between 3min and 5min, 8 for 3min, 1 for 5min) dot11BSSWidthChannelTransitionDelayFactor Changed min to 5 Changed default 5 dot11OBSSScanActivityThreshold strawpoll 5%: 5 3%: 6 Lots of debate on the percentage, not resolved Eldad Perahia (Intel) Eldad Perahia (Intel)

Friday July 13 Agenda 07/2110r1 (L-Length error) doc.: IEEE 802.11-07/2090r0 July 2007 Friday July 13 Agenda 07/2110r1 (L-Length error) 11-07-0591-07-000n-LB97-CID-1832-Operating-Mode-Bits.doc 11-07-734r3 Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 07/2110 L-Length fixed (and CID 402 resolved) by 07/2110 with no objections No objections to bringing to motion Eldad Perahia (Intel) Eldad Perahia (Intel)

07-0591r8 No objections to resolve CIDs July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 07-0591r8 No objections to resolve CIDs No objections to bringing to motion Eldad Perahia (Intel) Eldad Perahia (Intel)

11-07-734 July 2007 Grey: deferred from Montreal doc.: IEEE 802.11-07/2090r0 July 2007 11-07-734 Grey: deferred from Montreal New resolution is the upper text Blue: agreed on resolution on Wed Pink: modified resolution No objection to new resolutions for CID 39, 2250, 2252, 3322, 2256, 2259 (in red font) 2251 New Resolution: Counter w/ “The TXOP holder should transmit a CF_End frame in a basic rate non-HT PPDU, including non-HT duplicate PPDU, starting a SIFS after the L-SIG TXOP protected period, except during the 40 MHz phase of PCO operation (see 11.16).” 1524 Issue with proposed resolution is that NAV reset is no longer restricted to RTS Alternate solution is to restrict the LSIG TXOP initiation to RTS/CTS Issue with control wrapped RTS frame No objection to transfer to MAC 174 Strawpoll Do you support limiting MF HT-Length to value equivalent to duration of (4095/6Mbps)? Y 2+18 N 1 A 0 Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Monday July 16 (5-6pm) 11-07-614r8 Green highlight shows difference between r7 and r8 Data scanning would require Scanning period on the order of secs to not disturb OBSS traffic (like TCP flows) Passive scanning May need 10s of msec dwell Scan multiple channels RSSI Threshold Comments: Max of 0dBm allows for override of CCA mechanism, perhaps to change max to CCA threshold Perhaps compromise is to report RSSI value and move decision to AP Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Strawpoll Do you support the inclusion of an RSSI Threshold for OBSS Scan operations? Y:2 N:53 Eldad Perahia (Intel) Eldad Perahia (Intel)

11-07-614r8 continued Issues with 07/614 which would lead to no vote July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 11-07-614r8 continued Issues with 07/614 which would lead to no vote Activity threshold 100 – 400 Data traffic scanning Against 40 MHz in 2.4 GHz Clean up of resolution column Eldad Perahia (Intel) Eldad Perahia (Intel)

Motions July 2007 July 2007 doc.: IEEE 802.11-07/2090r0 Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Motion # Moved: Approve resolution of comments found on the tab labeled “coex pending motion set 1” in document 11-07/0339rY. Based on resolution for L-Length in 07/2110r2 Resolves 1 comment with C Passed by unanimous consent Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Motion # Moved: Approve resolution of comments found on the tab labeled “coex pending motion set 2” in document 11-07/0339rY. Based on resolutions for the Operating Mode Bits in 07-0591r8 Resolves 16 comments with As and Cs Passed by unanimous consent Eldad Perahia (Intel) Eldad Perahia (Intel)

July 2007 doc.: IEEE 802.11-07/2090r0 July 2007 Motion # Moved: Approve resolution of comments found on the tab labeled “coex pending motion set X” in document 11-07/0339rY. Based on resolutions for the ???? group Resolves YYY comments with As, Cs, and Rs Passed by unanimous consent Eldad Perahia (Intel) Eldad Perahia (Intel)