Project: IEEE 802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Reasonable Compromise Proposal] Date Submitted: [15November2005] Source: [John Barr] Company [Motorola] Address [1303 E. Golf Road, Schuamburg, IL 60196] Voice:[+1 847 576-8706], FAX: [+1 847 576-6758], E-Mail:[John.Barr@Motorola.com] Re: [15-05-0648-00-003a-mb-ofdm-updates.pdf, ] Abstract: [A reasonable compromise proposal for consideration by TG3a in order to allow the IEEE 802.15.3a task group to move forward with dignity.] Purpose: [Information for TG3a members to help them make a more informed decision.] Notice: This document has been prepared to assist the IEEE 802.15. 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 802.15.

Current Situation 802.15.3a Deadlocked since July 2003 Previous approach to a compromise did not gain consensus due to lack of participation by both parties Initiated January 2004 in Vancouver Merger #1 proposal group taking their specification to ECMA to avoid deadlock Merger #2 proposal introducing products and gaining design wins internationally Recent regulatory efforts will require changes to both specifications

Spectrum Options FCC rules are not being accepted in other regulatory regions: EU 3-5 GHz only with DAA, only 6-9.25 GHz similar to FCC rules (4.2-4.8 until 2010) Japan 3.4-4.8 only with DAA, only 7.25-10.25 GHz similar to FCC rules 5-6 GHz avoided due to overlap with NII and need for DAA with radar systems

Reasonable Proposal 3.1-4.9 GHz DAA required Mandatory mode is FFI, OFDM, 4.2-4.8 at 53.3 Mbps (may allow I-only operation to reduce complexity) All other MB-OFDM and DS-UWB rates optional between devices (TDMA) 7-10.25 GHz no DAA required Mandatory mode is DS-UWB, 7-10.25 at 55 Mbps All other MB-ODFM and DS-USB rates optional between devices as long as regulatory conditions allow: Regional location detection DAA

Beacons for an OFDM Piconet Superframe Duration # 1 OFDM Beacon MB-OFDM CTA OFDM CTA DS-UWB CTA 2 OFDM Beacon MB-OFDM CTA OFDM CTA DS-UWB CTA … N OFDM Beacon DS-UWB CTA MB-OFDM CTA N+1 OFDM Beacon MB-OFDM CTA OFDM CTA MB-OFDM CTA OFDM piconet uses 4.2-4.8 FFI OFDM at 55.3 Mbps for beacons and commands TDMA nature of 802.15.3 MAC allows any optional mode to be used in designated CTAs for devices that have equivalent modes

Why this should work Both merger proposals get mandatory mode in separate spectrum All devices desiring to use OFDM would associate in low band All devices desiring to use DS-UWB would associate in high band Highly scalable implementation to satisfy broad range of applications 800 Mbps DS-OFDM option Gbps DS-UWB option 480 Mbps Certified Wireless USB option Market gets roadmap to a common standard that satisfies world wide regulatory rules Device manufacturers can chose options to meet their needs Requires updates to both proposals that will be also be required to meet regulatory approval (e.g., June 2006 EU and Japan rules)

Why we need to compromise UWB rapidly losing market momentum due to lack of industry cooperation and uncertainty due to competing solutions Need a common front to ensure reasonable completion of world wide regulations for UWB Time to move forward and stop the pain 1 Gbps WLAN coming