IEEE%20802.15%20<subject>

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Project IEEE P802.19 Coexistence TAG Submission
Title Initial coexistence observations on
802.15.3a proposals Date Submitted 15 May,
2003 Source Jim Lansford, Company Mobilian
Corporation Address 7431 NW Evergreen Pkwy,
Hillsboro, OR 97124 Voice1 405 377 6170, FAX
1 425 671 6099, E-Mail jim.lansford_at_mobilian.com
Re Abstract 802.15.3a 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 Thi
s document has been prepared to assist the IEEE
P802.19. 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 P802.19.
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Some initial coexistence observations on
802.15.3a proposals

• Jim Lansford, Chair
• 802.19 Coexistence TAG
• Jim.lansford_at_ieee.org
• Chief Technical Officer, Mobilian Corporation
• 1 405 377 6170

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Status

• Most presentations have at least a brief section
  on coexistence
• Thank you!
• Companies began teaming up before initial
  proposals
• Thank you!
• 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
• 802.19 has not done a detailed review of the
  proposals yet
• Completing Coexistence Guideline document that
  describes process
• This presentation is just some initial
  observations

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802.15.3a 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!
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Summary Intel, et al
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

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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

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Summary - TI

• Only OFDM proposal
• NB interference performance well documented
• Needs more backup, but in general OFDM spectrum
  is tighter than UWB

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Other proposals

• 802.19 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
• 802.19 will continue to work with 802.15.3a to
  complete the review as you move toward
  downselection

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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!