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IEEE P802.15 Working Group for Wireless Personal Area Networks

This report provides an update on the progress of the Coexistence Study Group, including the development of a Coexistence Model for wireless devices in the 2.4 GHz ISM band. It also calls for submissions on the Coexistence Model and discusses collaboration between IEEE 802.11 and 802.15 on the issue of coexistence.

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IEEE P802.15 Working Group for Wireless Personal Area Networks

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  1. IEEE P802.15 Working Group for Wireless Personal Area Networks Coexistence Study Group Report #2 Hyatt Regency Kauai, HI Steve Shellhammer, Symbol Technologies

  2. Plan for the week • Coexistence SG update to ExCom • New Coexistence SG web site • Call for Submissions on Coexistence Model • David Cypher & Nada Golmie • Coexistence, Interoperability, & Other terms • MAC Performance Evaluations • Kevin Marquess • PHY Model Open Questions • ExCom vote on PAR, Thursday night Steve Shellhammer, Symbol Technologies

  3. References • Coexistence Charter 802.15-99/088r2 • PAR 802.15-99/086r3 • Five Criteria 802.15-99/096r1 • Coexistence Study Group Web Site • http://grouper.ieee.org/groups/802/15/SG Steve Shellhammer, Symbol Technologies

  4. Need for Coexistence Task Group • It is important that IEEE 802.15 WPAN devices coexist with other wireless devices in the unlicensed frequency bands. • In particular it is very important that 802.15 WPAN devices coexist with IEEE 802.11 WLAN devices. Steve Shellhammer, Symbol Technologies

  5. Scope of Coexistence Task Group • The goal will be to address coexistence of: • Any 802.15 WPAN with any 802.11 WLAN • Any 802.15 WPAN with any other 802.15 WPAN (assuming there will be more than one) • Any 802.15 WPAN with selected other devices in the same band (e.g. HomeRF). Steve Shellhammer, Symbol Technologies

  6. Coexistence Task Group Charter • Develop a Coexistence Model for the 2.4 GHz ISM band, that we can all agree to, which will help us assess the issues of Coexistence in a more quantitative way • Deliver a Recommended Practice for WPAN and WLAN devices intended to coexist in a common environment. Steve Shellhammer, Symbol Technologies

  7. Coexistence Model • The purpose of this model is: • To understand under what circumstance there is a coexistence problem and under what circumstances there is not a problem. • To develop supporting evidence to justify the recommended suggested practices Steve Shellhammer, Symbol Technologies

  8. Coexistence Model PHY Layer Models Data Traffic Models MAC Layer Models Coexistence Model RF Propagation Models Steve Shellhammer, Symbol Technologies

  9. How can 802.11 & 802.15 Collaborate on the issue of Coexistence? • We put together a proposal by talking to personnel within 802.11 and 802.15 • We discussed the proposal Tuesday within the Study Group • We then voted on the proposal in the Study Group Steve Shellhammer, Symbol Technologies

  10. Proposal for Task Group Operation • The Coexistence Study Group would become a Task Group in 802.15 • The Liaisons from 802.11 would be able to vote in the Task Group since they have voting rights in 802.15 • Progress of the group would be reported at the regularly scheduled 802.11/802.15 joint sessions Steve Shellhammer, Symbol Technologies

  11. Proposal for Task Group Operation • Once a draft Recommended Practice is ready for letter ballot it would be submitted to both the 802.15 and the 802.11 Working Groups for separate letter ballots. • In order for the Recommended Practice to be forwarded to the Executive Committee for Sponsor ballot, the letter ballot must pass in both Working Groups. Steve Shellhammer, Symbol Technologies

  12. Proposal for Task Group Operation • Anyone attending a Coexistence Task group session would be given attendance credit, for that time, in either 802.11 or 802.15. Steve Shellhammer, Symbol Technologies

  13. Study Group & 802.11 Votes • Vote to recommend to ExCom that the SG become a Task Group in 802.15 and recommend the proposed voting scheme • Yes: 21 No: 4 Abstain: 9 (SG) • Yes: 19 No: 0 Abstain: 9 (dot 11) • Should the SG become a TAG • Yes: 3 No: 21 Abstain: 11 (SG) • Yes: 0 No: 16 Abstain: 7 (dot 11) • Vote to recommend the attendance credit procedure to 802.11 & 802.15 • Yes: 31 No: 0 Abstain: 7 (SG) • Yes: 25 No: 0 Abstain: 6 (dot 11) Steve Shellhammer, Symbol Technologies

  14. Motion of Proposed Voting Rules • Motion to approve the separation of the subsequent letter ballot output from the 802.15 coexistence Task Group to both 802.11 and 802.15 voting members and for both groups to agree before sending to Excom • Yes: 21 No: 0 Abstain: 0 (.11) • Yes: 14 No: 0 Abstain: 0 (.15) Steve Shellhammer, Symbol Technologies

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