doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> March 27 2001 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@bandspeed.com.au, b.treister@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. Hong Bing Gan, Bijan Treister et al <author>, <company>

1. Channel assessment / categorisation March 27 2001 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; Hong Bing Gan, Bijan Treister et al

2. Reliable exchange of channel categorisation March 27 2001 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; Hong Bing Gan, Bijan Treister et al

3. Mechanism of adaptively hopping March 27 2001 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/change 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; Hong Bing Gan, Bijan Treister et al