Adaptive%20Frequency%20hopping%20in%20%20a%20Bluetooth%20/%20802.15.1%20piconet

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Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANs) Submission Title
Fundamentals of Adaptive Frequency Hopping Date
Submitted 27th, March, 2001 Source Hongbing
Gan, Bijan Treister, et al. Company Bandspeed
Inc. Address 7000 West William Cannon Drive,
Austin, TX78735 Voice 512 358 9000, FAX 512
358 9001, E-Mail h.gan_at_bandspeed.com.au,
b.treister_at_bandspeed.com.au Re Fundamentals
of adaptive frequency hopping Abstract The
documentation presents the fundamentals of a
non-collaborative coexistence mechanism -
Adaptive Frequency Hopping. Purpose This is a
submission to IEEE 802.15.2 of a Recommended
Practice for a Non-collaborative Coexistence
Mechanism. Notice This document has been
prepared to assist the IEEE P802.15. 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 P802.15.
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1. Channel assessment / categorisation

• - Adaptive hopping is based on the problem
  that some channels are better than others, thus
  some method of categorising the channels needs to
  be agreed upon.
• Constraints
• Create a sound and robust method of categorising
  each channel
• Assessment must not take too long
• Re-assessment of all channels at regular
  intervals
• Categorisation of channels should be polar
  bad/good
• Strive to detect all types of interference
• Minimise additions/changes to existing standards

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2. Reliable exchange of channel categorisation

• - i.e. The new adaptive hopping sequence needs
  to be known by all supporting devices on the
  piconet.
• Constraints
• Must be a robust mechanism which ensures a safe
  transition between hopping sequences
• Bulk channel replacement, one channel at a time
  replacement optional
• Minimise changes/additions to existing standards

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3. Mechanism of adaptively hopping

• i.e. The re-mapping, re-ordering and/or changing
  of the existing hopping sequence.
• Constraints
• Mechanism needs to show some throughput
  improvement for all networks in area according to
  some measure
• All devices must know how to re-order/re-map/chang
  e the sequence in the same way
• Uniform usage of good channels
• Define minimum number of good channels allowed
• Legacy devices will inter-operate with new ones
  in same piconet
• All devices maintain clock synchronisation with
  Master
• Minimise changes/additions to existing standard
• Minimise complexity of this mechanism