IEEE 802 Wireless Coexistence Study Group Update

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IEEE 802 Wireless Coexistence Study Group Update
Jim Lansford Jim.Lansford_at_mobilian.com (405)
377-6170
Sydney Interim Meeting Monday evening
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Update for Sydney meeting

• SEC conference calls held between meetings
• Refine mission statement
• Discussion of goals for anticipated TAG
• Definition of Coexistence
• Goals for Sydney meeting
• Broader feedback
• Further refinement of mission statement and goals
• Finalize mission statement and charter
• Proposed definition of coexistence
• Start work on organization and voting rules
• Prep for Vancouver plenary
• Meets Monday PM _at_ 630 (w/TG2), Wed _at_1-3

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Tasks the SG/TAG needs to accomplish

• Develop Mission Statement (SG ongoing)
• Statement of purpose (Recommend to ExCom how IEEE
  802 should address coexistence in existing and
  future specs) (SG ongoing)
• Definition of coexistence (TAG)
• Summary of current standards where coexistence is
  an issue (TAG)
• Recommendations to SEC (SG July Plenary)
• Summary and report (SG July Plenary)

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Mission Statement
(Based on feedback from 1 May conference call)

• The IEEE 802 Coexistence Technical Advisory Group
  (TAG) has the following missions
• The COEX TAG develops and maintains the IEEE 802
  policy for establishing coexistence between
  Standards.
• The COEX TAG develops and maintains guidelines
  for the communications industry to foster
  coexistence.
• The COEX TAG evaluates the coexistence issues
  between IEEE 802 PARs and Draft Standards, and
  makes recommendations to the IEEE 802 Executive
  Committee.

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Coexistence Definition

• Coexistence The ability of one system to
  perform a task in a given shared environment
  where other systems have an ability to perform
  their tasks and may or may not be using the same
  set of rules.
• Coexistence is quantified by degradation
  (simulated or measured) under a set of usage
  model assumptions, which must be defined for
  coexisting systems

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QA 1

• Will this group try to quantify coexistence?
• Not likely coexistence depends on so many
  variables (geometry, power, etc.) that defining a
  number that says whether you have achieved it or
  not isnt practical.
• What will this group do then?
• We currently dont have a policy for addressing
  coexistence thats first. This policy will
  address the ground rules for analyzing the
  degradation two systems cause to each other (or
  pairs of systems for multiple standards).

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QA 2

• How would this work?
• The TAG first defines policy. For example, the
  policy might be to say a WG needs to pick five
  usage models and determine the degradation due to
  a set of other approved standards, pairwise. We
  want to examine most likely scenarios, not corner
  cases, which may give pathological results.
• So how would you know if two systems coexist?
• The TAG is an advisory group to SEC analysis
  using the usage models would be used by WGs and
  SEC to make informed decisions. This is a
  similar concept to the FCCs OET. So the answer
  is that the TAG procedures will either convince
  voters that a Recommended Practice is needed, or
  that a draft has no coexistence issues and can
  proceed to further balloting.

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QA 3

• Does the TAG play a role other than formulating
  policy?
• Possibly. The current thinking is that the COEX
  TAG develops a definition of coexistence and a
  policy to guide WGs analysis of coexistence.
  Beyond that, the TAG may be called upon to help
  resolve coexistence conflicts by writing an
  independent report when a draft is submitted to
  SEC, but this has not been agreed upon.
• What about participation and voting?
• A TAG is governed by the same attendance and
  voting rules as WGs, but the specifics are not
  finalized.

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Proposed Operation

• The Coexistence TAG is responsible for defining
  the meaning of coexistence within the IEEE 802
  context.
• The Coexistence TAG will develop the guidelines
  by which WGs establish whether a given TG
  coexists.
• Uses official definition
• Uses usage models
• Uses modeling and/or measurements
• Recommends creation of a TG to develop a
  Recommended Practice, if needed (a la 802.15.2)
• The Coexistence TAG will publish guidelines by
  which the industry can evaluate coexistence.
• The Coexistence TAG is responsible for reviewing
  all proposed wireless PARs
• Like FCC/OET, evaluates PARs and highlights those
  that may require a Recommended Practice
• Summary report to be voted on by TAG
• Summary report presented to SEC
• SEC members take this summary under advisement
• This TAG is responsible for generating a final
  review report of the Draft Standard prior to
  Sponsor Ballot
• TAG should begin work when the first WG ballot is
  published
• Preliminary report should be issued to SEC within
  40 days
• Must be voted on by TAG
• Must be ratified by SEC
• SEC can require creation of a TG to write
  Recommended Practice