May 2007 doc.: IEEE 802.15-07-0623-00-003c doc.: IEEE 802.15-07/0783r0 July 2007 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Liaison Report – 802.11 WNG San Francisco. Date Submitted: 18 July,. 2007, Michael D. McInnis, The Boeing Company P.O. Box 3707, M/S 7M-CA Seattle, WA, USA, 98124 Voice: 206-290-7758, E-Mail: michael.d.mcinnis@boeing.com Abstract:.This document is a subset of document 11-07-2147-00-0wng for the purpose of explaining the status of that group. Purpose: Update the 802.15 WG on the 802.11 WNG status. Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. Slide 1 Mike McInnis, The Boeing Company Page 1 <author>, <company> Mike McInnis, The Boeing Company

Some Information in this document was respectfully copied from: May 2007 doc.: IEEE 802.15-07/0783r0 July 2007 Some Information in this document was respectfully copied from: Presentation Slides and Minutes of IEEE 802.11 WNG SC July 2007 Session Mike McInnis, The Boeing Company Mike McInnis, The Boeing Company

May 2007 doc.: IEEE 802.15-07/0783r0 July 2007 Tuesday 17 July 2007, 08:00 – 10:00 WNG Opening Report, IEEE P802.11-07/2147r0 Presentations Segregated Data Services in 802.11, 11-07/2161r1 Rotated and Scaled Alamouti Coding, 11-07/2114r0. WPAN-WLAN-WWAN Multi-Radio Coexistence, 11-07/2117r0. Attendance was approximately 50 people. Mike McInnis, The Boeing Company Mike McInnis, The Boeing Company

Segregated Data Services in 802.11 IEEE P802.11-07/2161r1 July 2007 Segregated Data Services in 802.11 IEEE P802.11-07/2161r1 Abstract Scenarios and requirements for adding segregated services / VLANs to IEEE 802.11 are presented along with some comments on existing or prospective mechanisms. Motivation Segregating traffic for “visitors” who should only have access to the Internet and limited facilities, from “insider” traffic. Provision of different services for free and subscriptions services in Hot Zone or Municipal systems. (May also segregate subscription service through different carriers.) In mesh environments, ability to safely forward data through nodes with limited trust. To enable aggregation of traffic over a single infrastructure for efficient deployment. Dedicated traffic segregation by type, such as VoIP Straw Poll Results Should the 802.11 WNG SC proceed at this time to vote on a motion to set up a Study Group? Yes: 6 No: 27 Abstain: 18 Should 802.11 receive further presentations on the topic of segregated data services? Yes: 46 No: 0 Abstain: 1 Mike McInnis, The Boeing Company

Rotated and Scaled Alamouti Coding 11-07/2114r0 July 2007 Rotated and Scaled Alamouti Coding 11-07/2114r0 Abstract This presentation introduces a new space-time coding scheme for 2 transmit antenna systems to the 802.11 community. Alamouti-coding [1998] used in 11n for 2x2 MIMO systems is based on repetition- retransmission. Shown to be suboptimum for multiple receive antennas (Diversity-Multiplexing Tradeoff) [Tse-2004] We propose to use instead of ordinary repetition so-called "scaled repetition" together with rotation. Motivation Is there any better space-time block code for 2x2 MIMO systems? Golden codes [Belfiore-2005] Tilted QAM [Wornell-2003] What about decoding complexity? Exhaustive ML search Is there any better space-time block code for 2x2 MIMO systems with low decoding complexity? Conclusion ROTATED and SCALED ALAMOUTI CODING PROVIDES Better Message-Error-Rate performance than the ALAMOUTI CODE for systems with multiple receive antennas. Good Message-Error-Rate performance close to the GOLDEN CODE. Mike McInnis, The Boeing Company

WPAN/WLAN/WWAN Multi-Radio Coexistence 11-07/2117r0 July 2007 WPAN/WLAN/WWAN Multi-Radio Coexistence 11-07/2117r0 Abstract This presentation gives an overview on multi-radio coexistence, covering usage model, problem, analysis, and solution. It shows that coexistence has to consider both proximity and collocation. Collocation imposes big challenges due to limited isolation and various interference sources. Today’s solutions are neither effective , nor scalable with number of radios and number of vendors. Standardization efforts are needed to provide information service, command, and air-interface support necessary for addressing coexistence issues. Conclusion Multi-radio simultaneous operation is becoming the norm, and coexistence interference is the limiting factor Proximity & collocation Existing approaches are ineffective lack of standard support in information service, commands, air-interface, etc. , and often less optimal use of resources or spectrum solutions forced to be pair-wise, vendor-specific, component-specific and NOT scale with number of radios, and number of vendors (inter-op) Call-for-discussion Mike McInnis, The Boeing Company