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© 2008 AT&T Knowledge Ventures. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Knowledge Ventures. UHF TV White Space --A New Challenge for Spectrum Managers Annual Meeting, National Spectrum Managers Association Arlington, VA May 20-21, 2008 Paul Henry AT&T Labs – Research Middletown, NJ
© 2008 AT&T Knowledge Ventures. All rights reserved. Underutilized Spectrum Can white space spectrum be successfully managed ?
© 2008 AT&T Knowledge Ventures. All rights reserved. UHF TV Whitespace Channel 54 in the Eastern US (graphic courtesy of Shared Spectrum Co. from a contribution to IEEE SG1) May 2004: FCC proposes to allow unlicensed use of TV whitespace Primarily UHF ~ MHz (chan 21-51) -- Desirable propagation characteristics Must protect TV and wireless microphone Smart (cognitive) radio may be needed Unlicensed operation Allowed Not allowed Nov 2004: IEEE formed to explore WRAN (~33 km nominal range) Oct 2006: FCC allows low-power fixed use; regulations TBD Continues inquiry re portable use; regulations 1H08 3Q08 Dec 2007: OFCOM (UK) Report 112 MHz to be allocated for unlicensed use after Digital Switchover (2012) Feb 2009: US DTV transition (2012 in UK)
© 2008 AT&T Knowledge Ventures. All rights reserved. Available Spectrum (after Digital TV transition in Feb 2009) *6 MHz/channel
© 2008 AT&T Knowledge Ventures. All rights reserved. Wireless Residential Multimedia Networking Broadband Access Media & Communications Server White space (cog radio) modem PDA Remote Capability 19Mbps per 6 MHz TV channel Multimedia with QoS (incl HDTV), Internet, VoIP Portability Modest power: ~10mW Technical challenge: protect incumbent users Typ path loss ~75dB
© 2008 AT&T Knowledge Ventures. All rights reserved. Keep white space devices outside of TV service area. Geolocation -- GPS Authoritative database – central control Unreliable indoors Increased device cost Spectrum sensing White space users scan for vacant channels Hidden-node problem What is radius of destruction for white space device? Protecting TV Users TV Service Area Residential white space network
© 2008 AT&T Knowledge Ventures. All rights reserved. Radius of Destruction To avoid interference to DTV: Air path loss > Pt – DTV tolerance – penetration loss + TV antenna gain = +10dBm – = 112 dB Propagation loss (Longley-Rice model): 112 dB implies R d ~ 2 km – Faster decay than inverse-square Note: Outdoor WRAN (802.22): 4 watt transmitter implies Rd ~ 15 km! Must inhibit transmission whenever within ~2 km of viewable DTV signal – Can white space device sniff for TV signal and then make reliable decision? TV transmitter White space device DTV receiver sensitivity: -84 dBm DTV Interference tolerance: -104 dBm RdRd
© 2008 AT&T Knowledge Ventures. All rights reserved. Spectrum Sensing --The Hidden Node Problem TV transmitter DTV sensitivity -84dBm White space device Shadow Device sensitivity margin = shadow fading + penetration loss + antenna gain difference Shadow fading in 90% of locations < 15dB* Typical penetration loss ~10dB** Antenna gain difference ~ 8dB* Required device margin ~ = 33 dB (~ 90% successful detection) Device sensitivity = -84 dBm -33 dB = -117 dBm Demonstrated device sensitivity: -115 to -120 dBm *R.A.OConnor, IEEE Trans Broadcasting, Sept 2001 **M.A.Sturza, Working Paper #16, New America Foundation, Jan DTV spectrum
© 2008 AT&T Knowledge Ventures. All rights reserved. Wireless Microphone Low power (working range < 100m) No standard signature like DTV; therefore very hard to detect Solution – Easily recognized beacon; protective bubble Problems – Abuse of protection – Unlicensed users (e.g. schools, churches); squatters rights WSD Mic Rcvr Protective Bubble Beacon
© 2008 AT&T Knowledge Ventures. All rights reserved. Field of Battle Opposed Cox communications Nat Assn Broadcasters NFL NASCAR In Favor Dell Google Microsoft Philips FCC Docket ET Mobility UVerse Radio science lost in political shouting match FCC labs conducting independent evaluation
© 2008 AT&T Knowledge Ventures. All rights reserved. FCC Field Tests Initial tests summer 2007 DTV detection: Philips -115dBm; Microsoft device failed Wireless mic detection (no beacon): Many false positives Technology not good enough for definitive field tests Recent activity Google laboratory: -120dBm sensitivity Ongoing tests: Philips, Microsoft, Motorola, Adaptrum No abatement of political posturing
© 2008 AT&T Knowledge Ventures. All rights reserved. Breaking the Logjam --Motorola and Google Proposals Goal: Get past the squabbles over spectrum sensing Dec. 07: In FCC filing Motorola proposes 2 classes of white space devices – <10mW (e.g. WLAN): spectrum sensing only – >10mW (e.g WRAN): Geolocation with spectrum sensing backup – Minimal public reaction March 08: Google proposes geolocation for all white space operation – Calls press conference WiFi on steroids Gigabit rates – Lots of headlines – Mission Accomplished – Probably consistent with Googles aspirations, but unacceptable to proponents of bluetooth-like applications Intense lobbying continues
© 2008 AT&T Knowledge Ventures. All rights reserved. Takeaways UHF TV white space Opportunity to use sparsely occupied, attractive spectrum Must protect digital TV and wireless microphone Technologies: Spectrum sensing, geolocation, beacon Protection achievable in lab setting; field tests to come Intense political posturing; logjam at FCC DTV transition Feb 2009 less than a year away; stay tuned…..
© 2008 AT&T Knowledge Ventures. All rights reserved. Thank you!
Doc.: IEEE Submission January 2004 Bill Byrnes, Shared Spectrum Co. Frequency Agile Spectrum Access Technologies This Presentation.
Cognitive Radio: Opportunities and Challenges Dr Ying-Chang Liang Senior Scientist & Project Manager Institute for Infocomm Research (I 2 R) Singapore.
Utilizing White Spaces for broadband access Where do we go from here? Fanny Mlinarsky octoScope.
Introduction to TV White Spaces In Ecma International TC48-TG1TC48-TG1 Ecma/TC48-TG1/2009/017.
All Rights Reserved © Alcatel-Lucent 2006, ##### Design Issues for Wireless Networks Across Diverse and Fragmented Spectrum Collaborators: Bell Labs India:
White Spaces Update NSMA Spectrum Management 2012 May 2012 H. Mark Gibson Director, Business Development.
Interference Analysis of TV-Band Whitespace G. Stuber, S. Almalfouh, D. Sale Alexandra Oborina, S Fundamentals of Cognitive Radio Systems.
Using License Exempt Spectrum for Wireless Broadband Ronald Repasi, Deputy Chief Office of Engineering and Technology Regional Educational Workshop On.
Sg-whitespace-09/0019r0 Submission January 2009 Steve Shellhammer, QualcommSlide 1 Impact of FCC R&O on IEEE 802 Date: Authors: Notice: This.
Tutorial on the P PAR for: Recommended Practice for the Installation and Deployment of IEEE Systems Carl R. Stevenson, WK3C Wireless LLC.
ITU-R SG8 Seminar on Tomorrows Technological Innovations Geneva, Switzerland September 9, 2004 Carl R. Stevenson, Agere SystemsSlide 1 Exploring the Feasibility.
Doc.: IEEE /0024r0 Submission FCC Report on Sensing of TV Channels IEEE P Wireless RANs Date: January 2009 Victor TawilSlide.
A View from the FCC’s Office of Engineering & Technology NSMA Spectrum 2008 May 21, 2008 Julius P. Knapp Chief Office of Engineering and Technology Federal.
Report on IEEE , IEEE J-SAC, and IEEE DySPAN 2007 tutorials Carlos Cordeiro Philips Research North America TCCN meeting.
Cognitive Radio: Next Generation Communication System By V.ALAGU ABINAYA 11MCO02.
Speaker: You-Min Lin Advisor: Dr. Kai-Wei Ke Date: 2011/04/25 Cognitive Radio Networks (CRN) 1.
SSC Page 1 Frequency Agile Spectrum Access Technologies Presentation to FCC Workshop on Cognitive Radios May 19, 2003 Mark McHenry Shared Spectrum Company.
White Space Spectrum Presented by: Chris Whiteley, Director of Business Development xG Technology, Inc. Jan. 22, 2010 Potential to Deliver Broadband Wireless.
A Vehicle-based Measurement Framework for Enhancing Whitespace Spectrum Databases Tan Zhang, Ning Leng, Suman Banerjee University of Wisconsin Madison.
Office of Engineering and Technology Agenda Meeting January 15, 2004.
Doc.: IEEE Submission November 2004 Gerald Chouinard, CRCSlide 1 Project: IEEE P Working Group for Wireless Regional Area.
Doc.: IEEE /0006r0 Submission January 2006 Gerald Chouinard, CRCSlide 1 TV bands White Spaces and DTV receiver RF front-end performance and protection.
Dr. Apurva N. Mody Chairman, WhiteSpace Alliance™ Standards Update: Using Standards.
Cognitive Radio Communications and Networks: Principles and Practice By A. M. Wyglinski, M. Nekovee, Y. T. Hou (Elsevier, December 2009) 1 Chapter 2 Radio.
Amer Hassan, Jan Kruys, Jim Raab, Stefan MangoldSlide 1Submission May 2004doc.: IEEE Spectrum Etiquette Rules for Shared and Unlicensed.
National Science Foundation Symposium Ed Thomas Chief, Office of Engineering and Technology Federal Communications Commission.
Doc.: IEEE /1254r0 Submission November 2008 Peter Ecclesine, Cisco SystemsSlide 1 TV white space FCC action Date: Authors:
Doc.: IEEE /0010r0 Submission January 2013 Gerald ChouinardSlide 1 Overview of the Beacon Standard IEEE Wireless RANs Date:
White Spaces Access to the Future November “The bottom line is that we have a potentially game changing technology in our sights... ” Senator John.
Doc: CRpNL-10/0012d0 Summary of White Space ruling in the USA Vic Hayes, TUDelft 06-Oct-10Submission by Vic Hayes, TUDelft1.
White Space Networking: The Road Ahead Ranveer Chandra Microsoft Research.
July 2011doc.: IEEE tv SubmissionSoo-Young Chang, CSUS Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Ashwini Kumar Kang Shin University of Michigan Aug , ICCCN 2009, San Francisco A Case Study of QoS Provisioning in TV-band Cognitive Radio Networks.
A Survey of Spectrum Sensing Algorithm for Cognitive Radio Applications YaGun Wu netlab 1.
Project: IEEE P Working Group for Wireless Personal Area Networks(WPANs) Submission Title: Link Budget for m Date Submitted: 5 March 2012.
Doc.: IEEE /1421r1 Submission November 2012 Rich Kennedy, Research In MotionSlide 1 TGaf Response to CA Comments Date: Authors:
Reliable Telemetry in White Spaces using Remote Attestation Omid Fatemieh, Michael D. LeMay, Carl A. Gunter University of Illinois at Urbana-Champaign.
Doc.: sg-whitespace r2 Submission March 2009 Gerald Chouinard, CRCSlide Presentation to the ECSG on White Space Author: Notice: This document.
Slide 0 National Spectrum Managers Association Unlicensed Devices – An Update Mitchell Lazarus May 22, |
Doc.: IEEE /180r2 Submission Mar04 Reed Fisher OkiSlide 1 Project: IEEE Working Group for Wireless Personal Area Networks (WPANs) Submission.
Doc.: IEEE Submission July 2003 Andy Gowans (UK RA) UK Ultra Wide Band (UWB) Compatibility Study Andy Gowans & Bharat Dudhia UK.
NSMA Conference Interference Temperature Round Table May 18, 2004 Les Wilding Cingular Wireless 5565 Glenridge Connector Atlanta, GA
Xuhang Ying, Jincheng Zhang, Lichao Yan Guanglin Zhang, Minghua Chen Ranveer Chandra Exploring Indoor White Spaces in Metropolises.
Fostering worldwide interoperabilityGeneva, July 2009 IEEE IP over Broadband Access in Support of Convergence Dr. W. Charlton Adams, President, IEEE.
FCC Actions To Support Development of WISPS Julius P. Knapp Deputy Chief Office of Engineering and Technology Federal Communications Commission.
1 System Design for Cognitive Radio Communications Mustafa Emin Şahin Hüseyin Arslan ELECTRICAL ENGINEERING DEPARTMENT UNIVERSITY OF SOUTH FLORIDA TAMPA,
m Soo-Young Chang, et al, CSUS November 2011 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission.
Doc.: IEEE /0803 Submission July 12-16, 2004 Barry (Intel) Slide 1 Wireless network operation in the TV Bands Update Barry O’Mahony
Bluetooth / IEEE Coexistence Reliability of IEEE WLANs in Presence of Bluetooth Radios Jim Zyren
White Spaces Trial Networks: Results and Next Steps Results and Next Steps.
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