1 1040 Henry Nsma May 2008 V3

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 [email_address]

Underutilized Spectrum Can ‘white space’ spectrum be successfully managed ?

UHF TV Whitespace ,[object Object],[object Object],[object Object],[object Object],Channel 54 in the Eastern US (graphic courtesy of Shared Spectrum Co. from a contribution to IEEE 802.18 SG1) Unlicensed operation Allowed Not allowed ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Available Spectrum (after Digital TV transition in Feb 2009) *6 MHz/channel

Wireless Residential Multimedia Networking Broadband Access Media & Communications Server White space (cog radio) modem PDA Remote ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Typ path loss ~75dB

Protecting TV Users ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],TV Service Area Residential white space network

Radius of Destruction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],TV transmitter White space device DTV receiver sensitivity: -84 dBm DTV Interference tolerance: -104 dBm R d

Spectrum Sensing --The Hidden Node Problem TV transmitter DTV sensitivity -84dBm White space device Shadow ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DTV spectrum

Wireless Microphone ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],WSD Mic Rcvr Protective Bubble Beacon

Field of Battle Opposed Cox communications Nat Assn Broadcasters NFL NASCAR ● ● ● In Favor Dell Google Microsoft Philips ● ● ● FCC Docket ET 04-186 ,[object Object],[object Object],Mobility UVerse

FCC Field Tests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Breaking the Logjam --Motorola and Google Proposals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Takeaways ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

1 1040 Henry Nsma May 2008 V3

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