1. Project: IEEE P802.19 Coexistence TAG
May 2003
Project: IEEE P Coexistence TAG
Submission Title: Initial coexistence observations on a proposals
Date Submitted: 15 May, 2003
Source: Jim Lansford, Company Mobilian Corporation
Address 7431 NW Evergreen Pkwy, Hillsboro, OR
Voice: , FAX: ,
Re:
Abstract: a has received a significant number of proposals for a high rate WPAN PHY; one of the criteria as part of the downselection process is coexistence. Since these systems will be sharing the spectrum with other systems based on IEEE standards, an acceptable coexistence strategy is important. This presentation offers some initial observations of the proposals that were presented in March 2003.
Purpose: For discussion
Notice: This document has been prepared to assist the IEEE P 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 P
Jim Lansford, Mobilian

2. Some initial coexistence observations on 802.15.3a proposals
May 2003
Some initial coexistence observations on a proposals
Jim Lansford, Chair
Coexistence TAG
Chief Technical Officer, Mobilian Corporation
Jim Lansford, Mobilian

3. Status Most presentations have at least a brief section on coexistence
May 2003
Status
Most presentations have at least a brief section on coexistence
Thank you!
Companies began teaming up before initial proposals
Proposals vary in their level of detail on coexistence
Some merely “check off the box”
Some have more in-depth discussion
Few offer any detailed analysis
has not done a detailed review of the proposals yet
Completing “Coexistence Guideline” document that describes process
This presentation is just some initial observations
Jim Lansford, Mobilian

4. 802.15.3a proposals teams Intel, et al (name?) Xtreme, et al (name?)
May 2003
a proposals teams
Intel, et al (name?)
Intel
Time Domain
Discrete Time
General Atomics
Wisair
Philips
FOCUS Enhancements
Samsung
Xtreme, et al (name?)
Xtreme Spectrum
Motorola TI
Others (with apologies)
This does not reflect teaming since March---please update us!
Jim Lansford, Mobilian

5. Summary – Intel, et al Multi-band approach
May 2003
Summary – Intel, et al
Unexpected
Interferer
3.1
10.6
Sacrifice 1 band for coexistence (dependent upon geographical location)
Multi-band approach
Makes setting frequency “notches” easier
Adds complexity vs single band
Time Domain presentation was good summary of interference issues
Did not see analysis of UWB as victim of 11a
Converse of laptop collocation problem
Jim Lansford, Mobilian

6. May 2003
Summary – Xtreme, et al
BPSK single channel, with variable frequency and bandwidth
Uses coding to vary data rate
Coexistence with 11a through filtering
Could use more analysis in backup
Jim Lansford, Mobilian

7. Summary - TI Only OFDM proposal
May 2003
Summary - TI
Only OFDM proposal
NB interference performance well documented
Needs more backup, but in general OFDM spectrum is “tighter” than UWB
Jim Lansford, Mobilian

8. Other proposals 802.19 has not had time to evaluate other proposals
May 2003
Other proposals
has not had time to evaluate other proposals
We will continue to review in ad hoc conference calls between meetings
Some of these are complete solutions, some are commentaries on UWB technology in general
will continue to work with a to complete the review as you move toward downselection
Jim Lansford, Mobilian

9. Summary Coexistence issues are important!
May 2003
Summary
Coexistence issues are important!
Some good work has been done on 15.3a proposal as interferer
For your own downselection process, advise you also consider proposal as victim
Collocation with 11a will occur in practice
Thanks for your continued assistance; we will need more help from you in the future!
Jim Lansford, Mobilian