November 1999

Steve Shellhammer, Symbol TechnologiesSlide 1

doc.: IEEE 802.15-99/121r2

Submission

IEEE P802.15 Working Group for Wireless Personal Area Networks

Coexistence Study Group Report #2

Hyatt Regency

Kauai, HI

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 2

doc.: IEEE 802.15-99/121r2

Submission

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

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 3

doc.: IEEE 802.15-99/121r2

Submission

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

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 4

doc.: IEEE 802.15-99/121r2

Submission

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.

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 5

doc.: IEEE 802.15-99/121r2

Submission

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).

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 6

doc.: IEEE 802.15-99/121r2

Submission

• 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.

Coexistence Task Group Charter

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 7

doc.: IEEE 802.15-99/121r2

Submission

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

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 8

doc.: IEEE 802.15-99/121r2

Submission

Coexistence Model

PHY Layer Models

MAC Layer Models Data Traffic Models

RF Propagation Models

Coexistence Model

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 9

doc.: IEEE 802.15-99/121r2

Submission

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

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 10

doc.: IEEE 802.15-99/121r2

Submission

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

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 11

doc.: IEEE 802.15-99/121r2

Submission

• 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.

Proposal for Task Group Operation

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 12

doc.: IEEE 802.15-99/121r2

Submission

• Anyone attending a Coexistence Task group session would be given attendance credit, for that time, in either 802.11 or 802.15.

Proposal for Task Group Operation

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 13

doc.: IEEE 802.15-99/121r2

Submission

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)

November 1999

Steve Shellhammer, Symbol TechnologiesSlide 14

doc.: IEEE 802.15-99/121r2

Submission

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)