Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [A Discussion on a Hybrid Backward Compatible WLAN/PAN Concept] Date Submitted: [10 November 2003] Source:[S. David Silk] Company [Motorola] Address [1301 E. Algonquin Road, Schaumburg, IL 60196, USA] Voice:[(847) 576-0410], FAX: [(847) 538-4593], E-Mail:[Dave.Silk@motorola.com] Re: [mmW IG Call For Papers and Participation, IEEE P802.15-03/397r2] Abstract:[A discussion on a hybrid backward compatible WLAN/PAN concept utilizing 60 GHz] Purpose: [mmW IG November 2003 meeting contribution] 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. S. David Silk, Motorola

2. A Discussion on a Hybrid Backward Compatible WLAN/PAN Concept The following organizations contributed to this document: Motorola Labs – USA and FranceFrance Telecom R&D S. David Silk, Motorola

3. Motivation • Observations: • The Bluetooth, IEEE802.11b, and IEEE802.11a wireless standards demonstrate a progression in data rate capability of approximately 1 Mbps, 10 Mbps, and 100 Mbps, respectively. V-Band unlicensed spectrum provides an opportunity to continue the data rate trend to Gbps operation. • A modest degradation in spectral efficiency can be traded off for a lower system cost, given the large amount of available bandwidth • Current WLAN/PAN technologies have begun to address distribution of multimedia content in dense urban environments • 60 GHz unlicensed spectrum has already attracted the interest of other regulatory agencies • Challenges: • Identify features to provide added utility beyond existing WLAN/PAN technologies • mmW technology will impact solution cost • Exploit unlicensed bands with large amounts of available spectrum to realize higher capacity, cost-competitive solutions - “So much data, so little time” • Purpose of this presentation: • Consider using 60 GHz as an extension of existing WLAN/PAN solutions to provide nomadic terminal mobility achieving higher throughput for dense urban deployment S. David Silk, Motorola

4. application space 60GHz 1000 BroadWay: 60GHz 5GHz Ubiquitous TV PAN/LAN Convergence 100 Infotainment 2.4GHz UWB IEEE802.15.3a 802.11a/g HIPERLAN/2 IEEE802.11n (HTSG) HIPERLAN1 802.11b IEEE802.15.3 10 Video Streaming Max data rate (Mbps) Video data rate HomeRF 3GPP IEEE802.11 Still Imaging 1 High Speed Internet EDGE 80x Bluetooth Audio Streaming GPRS 0.9 - 1.8GHz 0,1 Text Messaging HSCD Voice 4 years 0,01 1996 1998 2000 2002 2004 2006 2008 2010 The Wireless Landscape Local Area WLAN Nomadic Wide Area Cellular PAN S. David Silk, Motorola

5. 60 GHz Extension of WLAN/PAN Solutions– An Example Based on Broadway • The Broadway Vision: • Extend and complement 5GHz WLAN with 60 GHz to provide a solution in dense urban environments with hot spot coverage without sacrificing throughput • Provide backward compatibility with existing 5 GHz OFDM solutions • Provide total system throughput >400 Mbps via bandwidth expansion • An Example Architecture: • Access points (AP) utilize full-time dual band operation • Mobile terminals (MT) utilize one band at a time • Employ Rx omni antenna to avoid MT pointing • Employ AP transmission from remote locations for full coverage – OFDM can tolerate multipath S. David Silk, Motorola

6. 5 GHz 5 GHz 60 GHz AP 60 GHz AP 60 GHz MT3 MT MT1 MT2 60 GHz Extension of WLAN/PAN Solutions– An Example Based on Broadway Continued • Ad-hoc clustered architecture limited to 1-2 hops to alleviate shadowing effects • Manage ad-hoc networking using TDD frame structure to preserve QoS • Using the HiperLAN/2 framework, a cluster is used for peer-to-peer communications in the 60 GHz band • The AP is responsible for the management of the system in both bands • Using a discovery and routing algorithm at 60 GHz the AP specifies clusters, cluster heads, and forward nodes • DLC/CL protocol stack has also been specified for AP and MT • Address applications for vendor hot spots, public internet access, home, enterprise, and campus environments S. David Silk, Motorola

7. Path Loss and Range Analysis for an OFDM Solution Compatible with 5 GHz Technology • Goal: maintain 5 GHz system carrier spacing • Limit channel bandwidth to multiples of 20 MHz (40 to 240 MHz) • Limit number of subcarriers from 64 to 768 for the various bandwidths • Limit sub-carrier spacing from 312.5 kHz to 625 kHz • Enable range of 2-4m using 240 MHz and 26 m using 20 MHz • System parameters for preliminary range analysis • OFDM parameters: • Carrier spacing: 625 kHz • Guard interval size: 800 ns • Oversampling rate: 0.75 • Transmit power: 10 dBm • Antenna gain: GTx =3 dBi, GRx =3 dBi • Rx noise figure: 8 dB • Hardware impairment margin: 2 dB • Conclusion: • Approximately 400 Mbps is achievable at 5m • For a given bit rate an increase in bandwidth is preferable over an increase in constellation size to realize more range S. David Silk, Motorola

8. Conclusions • Motorola is interested in contributing to the mmW Interest Group • This presentation suggests a migration to 60 GHz while maintaining backward compatibility with existing WLAN/PAN technologies – a topic area that warrants further consideration • 60 GHz should be wideband to exploit the available unlicensed spectrum; a rationale for picking the right modulation scheme must be developed • Establish features/performance/criteria for differentiation from other technologies S. David Silk, Motorola