1. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 1 IEEE 802.19 Wireless Coexistence TAG Steve Shellhammer shellhammer@ieee.org What is a Coexistence Assurance Document?

2. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 2 Proposed 802 Rules The 802.19 Coexistence TAG is proposing changes to the 802 Policies and Procedures to address coexistence –IEEE 802.19-04/0010r6 The new rules would require that the working group produce a coexistence assurance (CA) document and supply the document with the draft at letter and sponsor ballot.

3. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 3 Purpose of a CA Document A CA document is intended to demonstrate that the proposed standard coexists with current 802 wireless standards in unlicensed. –The two wireless standards continue to operate acceptably. –Current 802 wireless standards are those that have been ratified, not drafts.

4. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 4 Two way Street Coexistence needs to be considered from two perspectives –How the new standard would impact the performance of the current standard –How the current standard would impact the performance of the proposed standard.

5. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 5 Coexistence Assurance Methodology IEEE 802.19 Coexistence TAG is developing a Coexistence Assurance Methodology document to give guidance to the working groups on what is to be included in a coexistence assurance document. This presentation gives a brief overview of what would be required.

6. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 6 Technical Argument in CA Document A coexistence assurance document makes technical arguments that the proposed standard coexists with other standards. This is done by giving technical arguments that the performance of the wireless networks is not significantly degraded in the presence of interference from the other wireless network.

7. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 7 Interference Model One method of making these technical arguments is to build an interference model The WG has a choice between different levels of effort and model accuracy in developing this model –Analytical –Simulation –Combination

8. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 8 List of Wireless Networks Considered List of all other unlicensed 802 wireless standards considered in the CA document Optional list of other wireless systems to be considered (if the WG chooses to consider systems other than 802 systems)

9. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 9 Performance Metrics Depending on the applications running on each wireless network several performance metrics should be considered –Throughput –Latency (VoIP) –Frame Loss Rate –Etc.

10. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 10 Relative Performance Highly accurate absolute performance is not the issue. The CA document should show the relative performance of the wireless networks, with and without interference.

11. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 11 Physical Topology Specify the number of nodes in each network Specify the location of the devices –Vary d and look at network performance d Network 1 Network 2

12. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 12 Results The CA documents could plot performance metrics as a function network separation The performance metrics could then be plotted with and without interference This information would give an indication of the coexistence of the two wireless networks

13. doc.: IEEE 802.19-04/0025r0 Submission July 2004 Steve Shellhammer, Intel CorporationSlide 13 Conclusions We would encourage members of the wireless working groups to join 802.19 in developing the CA methodology document Comments?