MotionBandspeed doc.: IEEE /512r1 Slide 1 November, 2001 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Why Use of Bad Channels Should Be Optional Date Submitted: 12 November 2001 Source: Greg Ellard, Vitaliy Sapozhnykov, HongBing Gan, Bijan Treister, Efstratios Skafidas Bandspeed Inc. Address Level 9, 500 Collins St., Melbourne 3000, Victoria, Australia Voice: FAX: {v.sapozhnykov, h.gan, b.treister, Re: [] Abstract:Motion to make use of bad channels optional and supporting reasons why bad channels should not be present in the adapted hop sequence are provided Purpose:Provide the motion and for presentation. 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

MotionBandspeed doc.: IEEE /512r1 Slide 2 November, 2001 Why Intelligent Use of Bad Channels (Partition Sequence Generator) should be Optional

MotionBandspeed doc.: IEEE /512r1 Slide 3 November, 2001 AFH Proposal Structure Legacy Hop Selection Kernel Master’s CLK Master’s Address Frequency Re-Mapper (AFH Post Processing) Channel Condition (Good, Bad) Partition Sequence Generator If there are Kept Bad Channels (B K ) Optional

MotionBandspeed doc.: IEEE /512r1 Slide 4 November, 2001 Why Partition Sequence should be Optional (1) FCC NPRM and world wide regulations permit use as less as 15 channels. Bad channel usage applies when the number of good channel N G is less than 15. Very rare scenarios If N G < 15, theoretical benefits of intelligent use of bad channels is trivial. But in practice, if N G < 15, making a connection is extremely difficult, let alone implementing AFH.

MotionBandspeed doc.: IEEE /512r1 Slide 5 November, 2001 Why Partition Sequence should be Optional (2) Not compatible with Bluetooth SIG AFH mechanism. Not compatible with legacy devices. Not beneficial for broadcast, Piconet synchronization, park mode, sniff mode, etc. Not supporting mixed data and voice link (ACL+SCO). Extra gates, extra time, minimal benefits

MotionBandspeed doc.: IEEE /512r1 Slide 6 November, 2001 Making ‘Intelligent Use of Bad channels_ (Partition Sequence Generator)’ OPTIONAL Benefits Bluetooth SIG, IEEE and Industry