1. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 1 Harry Worstell AT&T Research Vice-Chair IEEE 802.11 WG Chair – WNM Study Group IEEE 802.11 Study Group Overview - 2004

2. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 2 6. Patents 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. This assurance shall be provided without coercion and prior to approval of the standard (or reaffirmation when a patent becomes known after initial approval of the standard). This assurance shall be a letter that is in the form of either a) A general disclaimer to the effect that the patentee will not enforce any of its present or future patent(s) whose use would be required to implement the proposed IEEE standard against any person or entity using the patent(s) to comply with the standard or b) A statement that a license will be made available without compensation or under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair discrimination This assurance shall apply, at a minimum, from the date of the standard's approval to the date of the standard's withdrawal and is irrevocable during that period. IEEE-SA Standards Board Bylaws on Patents in Standards Approved by IEEE-SA Standards Board – December 2002

3. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 3 Inappropriate Topics for IEEE WG/TG/SG Meetings Don’t discuss licensing terms or conditions Don’t discuss product pricing, territorial restrictions or market share Don’t discuss ongoing litigation or threatened litigation Don’t be silent if inappropriate topics are discussed… do formally object. If you have questions, contact the IEEE Patent Committee Administrator at patcom@ieee.org Approved by IEEE-SA Standards Board – December 2002

4. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 4 4 Study Groups 4.1 Function The function of a Study Group (SG) is to complete a defined task with specific output and in a specific time frame. Once this task is complete, the function of the SG is complete and its charter expires. The normal function of a SG is to draft a complete PAR and five criteria (see subclause 9.2) and to gain approval for them at WG 802.11, 802 EC, IEEE New Standards Committee (NesCom) and the IEEE Standards Board. The decision of whether to utilize the 802.11 WG or to establish a new WG or TAG to carry out work items recommended by a SG is made by the 802 EC with advice from the 802.11 WG. 4.2 Formation A SG is formed when sufficient interest has been identified for a particular area of study within the scope of WG 802.11. The first step in the process is a call for interest. Any WG member or observer can make this at the WG 802.11 opening plenary. An 802.11 SG can then be initiated by 75% approval of the 802.11 WG and must be approved by the 802 EC. During this approval process the 802 EC decides whether a SG is within the scope of WG 802.11, should be moved to another WG or should be set up as an Executive Committee Study Group.

5. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 5 4.4 Study Group Operation SG follow the operating procedures for TG specified above with the following exceptions detailed below. 4.4.1 Study Group Meetings SG meetings held adjunct to 802.11 WG Plenary or Interim sessions count towards 802.11 WG voting rights 4.4.2 Voting at Study Group Meetings Any person attending a SG meeting may participate in SG discussions, make motions and vote on all motions (including recommending approval of a PAR and five criteria). 4.4.3 Attendance List Since SGs may have members who are not part of the parent WG, a separate attendance list must be maintained for the meetings of the SG and will be submitted as a document to the WG Vice-Chair. 4.3 Continuation A SG exists for up to 6 months. If it has not completed its work within that time, a request must be made to the WG for an extension for up to additional 6 months. Any request for SG extension will be voted upon at the WG 802.11 closing plenary.

6. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 6 1940: Spread spectrum technology first used by the military 1980: Limited applications using narrowband technology 1989: FCC assigns frequency for commercial use. ISM bands authorized (900 MHz, 2.4 GHz, 5 GHz) 1990: 900 MHz products begin shipping –IEEE begins work on industry standard 1994: 2.4 GHz products begin shipping 1997: IEEE 802.11 standard approved. –2.4 GHz products begin dominating the scene 1998: FCC authorizes the UNII Band 1999: IEEE 802.11a&b standard ratified. –WECA formed for interoperability testing –Wide Band Frequency Hopping NPRM Released by FCC –“Enhanced MAC - QoS and Security” Task Group chartered 2001 QoS/Security enhancements Task Groups begin 2003 FCC Expands the UNII Band by 255 MHZ 802.11: WLAN History

7. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 7 ISO/OSI Reference Model Physical Data Link Network Transport Session Presentation Application Area of Focus } Physical Layer Medium Access Control Sub Layer LLC (802.2) and Bridging (802.1) 802.11: Which Layers are Standardized?

8. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 8  Peer/Peer and Client/Server  Small User Population  Isolated "Cells" and User Groups  Non-Contiguous Coverage  Indoor Operation  Limited Mobility  Mostly Asynchronous Traffic  Slower than Ethernet First Generation Wireless LANs  InterNet/IntraNet  Ethernet-Compatible Speeds  Multiple RF Bands to operate Second-Generation Wireless LANs  Larger User Population  Full Roaming/Handoff Capability  Contiguous Coverage in Dense Areas  Wider Area Coverage for Community LANs  Mobility (Follow-Me Service)  Mix of Async and Isochronous Traffic  Higher System Utilization  Enhanced Security IEEE 802.11 Fourth-Generation of Wireless Communications Third-Generation Wireless Communications TDMA EDGE Wideband CDMA 802.11: Indoor Wireless LAN Migration

9. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 9 TGk: The First Step in Managing the Radio Resource Standardized RF Measurements and Methods Basic measurements available to upper layers from AP and Client -Neighbor lists for AP’s -Client association to AP lists -Noise histograms -Accurate power level measurements in dBm referenced at the antenna Better diagnostics -Obtaining information in a standard form from all equipment Enable better frequency planning and network optimization and performance -Automated signal/interference surveys Enable new services -Location awareness capabilities for AP’s and Clients 802.11 –Configuration for STA and very limited proprietary RF measurements –Widely implemented in APs, but not standardized –Very simple monitoring of global AP statistics (proprietary implementations only) 802.1x –Detailed auth state for individual 1x ports –Also some per port statistics –Not widely implemented in access points today Bridge MIB –Possible to get some info on which STAs are associated with an AP –Implemented in some APs –Not 802.11 specific, little MAC, and no PHY statistics Migrating Current MIBs… To… NETWORK LINK/MAC PHY

10. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 10 Porting Management Fundamentals to 802.11 Migrating Present Mechanisms… Radio Resource Management via CSMA and backoff Disorganized Reuse No Coordination (except proprietary methods) Interference growing Channels likely to be too noisy for QoS Disciplined Radio Resource Management Reuse via space, time, frequency AP’s syncronized from common backbone AP’s/Clients communicate across RF channel Discovery process, followed by self-organizing Enable Auto-configuration Processes Enable Cognitive Radio interference avoidance Disciplined Radio Resource Management Reuse via space, time, frequency AP’s syncronized from common backbone AP’s/Clients communicate across RF channel Discovery process, followed by self-organizing Enable Auto-configuration Processes Enable Cognitive Radio interference avoidance NETWORK LINK/MAC PHY To…

11. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 11 Graph-Coloring Algorithm -6 -5 -6 F1 F2 F3 F4 F5 F6 Channel/Time Assignment Optimized for Minimum Co-Channel Interference B C D E F G A H Automatic Reciprocity Measurements Benefits: Reduced Installation Planning Improved Coverage Modular Capacity Additions Self-Healing Capability Trends: Automatic Frequency/Time Assignment

12. doc.: IEEE 802.11-04/538r0 Submission May 2004 Harry Worstell, AT&TSlide 12 Trends: Increase Reuse Factor with Space, Frequency, Time