1. 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:[ ], FAX: [ ],
Re: [ a-mb-ofdm-updates.pdf, ]
Abstract: [A reasonable compromise proposal for consideration by TG3a in order to allow the IEEE a 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 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

2. 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

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

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

5. 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 FFI OFDM at 55.3 Mbps for beacons and commands
TDMA nature of MAC allows any optional mode to be used in designated CTAs for devices that have equivalent modes

6. 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)

7. 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