1. March, 2003 Tutorial 1 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Coexistence of Multiple UWB PHY Layers] Date Submitted: [March 12, 2003] Source: [John Santhoff] Company [Pulse~LINK] Address: [9155 Brown Deer Rd. Suite 8, San Diego, CA 92121] Voice:[(858) 587-9001], FAX: [(858) 587-8799], E-Mail:[jsanthoff@pulselink.net] Re: [Tutorial to IEEE 802.19] Abstract:[This presentation provides an overview on coexistence of multiple UWB PHY layers ] Purpose:[To focus attention & start discussion on issues effecting Coexistence of multiple UWB PHY layers] 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.

2. March, 2003 Tutorial 2 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Coexistence of Multiple UWB Physical Layers

3. March, 2003 Tutorial 3 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Outline Traditional Coexistence Why address UWB Coexistence? How to address UWB Coexistence? Features of a Common Discovery Protocol Why is it important to address these issues now?

4. March, 2003 Tutorial 4 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Coexistence UWB coexistence traditionally is concerned with UWB Tx to Narrow- Band Rx. Coexistence is defined as “the ability of one system to perform a task in a given shared environment where other systems may or may not be using the same set of rules”.[1] What about coexistence of multiple UWB Air Interfaces? –We need some form of “Etiquette” to manage peaceful UWB coexistence of different UWB PHY layers –What we do today could potentially set the path for UWB evolution for decades to come. Lets not have our rush to market force us into compromises or positions we will regret later. –A framework that addresses guidelines on “what spectrum” is accessed and “when”. A common discovery protocol can act as the arbitrator that insures this happens in a manner that minimizes interference and interaction at the PHY layer.

5. March, 2003 Tutorial 5 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Why a Common Discovery Protocol? We have a Once-in-a lifetime opportunity to define an emerging wireless standard on a potential global scale. Let’s use this opportunity to address coexistence and interoperability as a part of the standard instead of as an after thought. As an example, the unlicensed ISM bands have experienced explosive growth with multiple PHY layer interfaces being defined. In the ISM 2.4 GHz band, there are no less than five different PHY standards competing for coexistence in the same spectrum. (802.11b, 802.15.3, 802.15.4, Bluetooth and Cordless Phones) UWB is gaining momentum and it is likely that multiple UWB based PHY layers will come into usage. Already 802.15.3a and 802.15.4 are looking at UWB based PHY’s.

6. March, 2003 Tutorial 6 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers What is a Common Discovery Protocol? A “lowest common denominator” UWB operational mode common to ALL UWB air interfaces A methodology for allowing multiple different UWB PHY layers to coexist in the same coverage areas through cooperative management of the allocated PHY resources of time and frequency.

7. March, 2003 Tutorial 7 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Design Philosophy of a Common Discovery Protocol for UWB A common MAC mechanism that is “pro-active” instead of “reactive” through the use of a pre-defined framework outlining how UWB PHY layer resources are allocated. Collaborative: –Collaborated TDMA /FDMA techniques to allow for alternate transmissions among different UWB standards –Collaborated techniques for managing packet transmission based on channel monitoring Non- Collaborative: –Adaptive packet (time/frequency) selection and scheduling

8. March, 2003 Tutorial 8 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Possible Candidate Framework for Coexisting UWB PHY Layers Assign spectrum based on PAN or LAN 3.1 - 4.9GHz for LAN (longer ranges) Avoid 4.9 - 5.9 GHz 802.11a entirely 6 - 8 GHz for Multi-Band PAN 8 - 10.6 GHz for Ad-Hoc PAN Channel Access managed through allocation of TDMA\FDMA resources

9. March, 2003 Tutorial 9 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers References [1] IEEE 802.15.2 definition of coexistence, http://grouper.ieee.org/groups/802/15/pub/2000/Sep00/99134r2P802-15_TG2- CoexistenceInteroperabilityandOtherTerms.ppt

10. March, 2003 Tutorial 10 Pulse~LINK Inc. Doc: 03008r0P802-19_Coexistence of Multiple UWB PHY Layers Questions? Comments? Suggestions?