doc sg-whitespace 09 -0058 r 2 March

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Presentation to the ECSG on White Space Author: Abstract This contribution illustrates the work carried out by the 802. 22 WG over the last 5 years in developing the Wireless Regional Area Network standard to be used in TV White Space. Notice: This document has been prepared to assist IEEE 802. 22. 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 grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802. 11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures , including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard. " Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair Carl R. Stevenson as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802. 11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at . Submission 1 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 2 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 IEEE Standards RAN “Regional Area Network” IEEE 802. 22 30 km ec μs ow 37 d in n. W 2. 2 ptio ) ix r so pref b 5 0. 2 a lic th yc. 8 ltipa (C 0 Mu 23 Mbit/s BW= 6, 7, 8 MHz 54 - 862 MHz Submission 3 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 - Cable-modem / ADSL - Wi. Fi hot-spots in ISM bands - Medium power wireless systems - Higher power, lower frequency broadband access system Rural Broadband: MAC Long round-trip delays 5 km 16 km 64 -QAM 23 km 30 km 16 -QAM QPSK PHY Adaptive modulation Submission 4 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Typical CPE installation (Fixed) Sensing antenna GPS antenna TX/RX WRAN Antenna Submission 5 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Frame Structure Superframe = 160 ms Frame = 10 ms Superframe =16 frames Submission 6 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Reference Architecture Submission 7 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 8 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Coexistence among communications systems in TV White Space Selfcoexistence Submission 9 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 10 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 WRAN CPE and DTV protection DTV Submission WRAN 11 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Co-channel keep-out distance between DTV and 802. 22 WRAN keep-out distance: Minimum field strength: Protection ratio: CPE antenna front-to-back: Interfering field strength: 41 d. B(u. V/m) 23 d. B 14 d. B 32 d. B(u. V/m) 118 km 16. 2 km DTV TX (1 MW ERP, 300 m) 4 W WRAN base station keep-out distance 134. 2 km Geolocation & Database 41 d. B(u. V/m) F(50, 90) 16. 8 km 4 W WRAN Base Station 36. 3 d. B(u. V/m) Submission 12 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 TV sensing techniques studied by 802. 22 Signal specific • Blind – ATSC Sequence correlation sensing – Energy detection – Eigenvalue sensing (I 2 R) • ATSC signature • Pilot recovery • Single ATSC data field • Multiple ATSC data fields • Sync segment • Multi-resolution (MRSS) • Spectral correlation – Sensing for one TV band – Sensing procedure for TV signals – Sensing for multiple TV channel band – ATSC FFT-based Pilot sensing (Philips) – ATSC Pilot sensing technique using high order statistics – ATSC PLL-based Pilot sensing technique • Selection of frequency components: emphasizing near Parts with abrupt changes • ATSC cyclostationary sensing technique Submission • Dual FPLL pilot sensing – ATSC Pilot covariance sensing technique • Covariance based sensing – Higher order statistics based pilot detection 13 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 DTV Broadcast Incumbent Sensing ATSC FFT-based Pilot Sensing Technique (Philips) FFT applied around the pilot carrier 1 ms sensing window will allow a 32 -point FFT while a 5 ms window will allow a 256 -point FFT Submission 14 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 DTV Broadcast Incumbent Sensing techniques performance comparison Submission 15 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 16 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 WRAN coverage and co-channel operation with wireless microphones F(50, 99. 9) F(50, 10) Wireless microphone operation Area where CPEs need to change frequency Minimum WRAN field strength: 29 d. B(u. V/m) R 2 R 1 Area where CPEs need to reduce their transmit power as a function of their distance to the wireless microphone operation Edge of coverage of the WRAN BS (e. g. , 17 km for 4 W EIRP, 30 km for 100 W EIRP) Submission 17 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Wireless microphone sensing techniques studied by 802. 22 • Signal specific • Wireless microphone covariance sensing technique – Covariance based sensing – Covariance absolute value detection – Covariance Frobenius norm detection • Spectral correlation sensing technique • Sensing for one TV band – Sensing Procedure for wireless microphone signals Submission 18 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 19 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22. 1 Beacon Design 3. 33 ms I-channel Q-channel 98 ms Inter-beacon networking period - Source address - Location - subchannel map - signature - certificate 101 ms frame Submission 20 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22. 1 Beacon Design Signature Location Certificate PPDU (101 octets) Submission 21 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Detection of the 802. 22. 1 beacon -114 d. Bm Submission 22 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 23 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Frame Structure Superframe = 160 ms Frame = 10 ms Superframe =16 frames Submission 24 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Frame Structure Superframe = 160 ms Frame = 10 ms Superframe =16 frames Submission Frame quiet period: 5. 1 ms 25 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Superframe Structure Multi-frame quiet periods Submission 26 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 Superframe Structure Superframe quiet period: up to 158 ms Submission 27 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 28 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 WRAN Self-coexistence considerations MAC self-coexistence schemes PHY coexistence mechanisms Different TV channel selection for operational channel and first backup channel Frame allocation signalled by the superframe control header (SCH) Submission 29 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Coexistence Beacons for Inter-WRAN Communications • Inter-cell communication mechanism to keep BSs aware of the other nearby WRAN cell operation: – Coexistence beacon • Transmitted during the self-coexistence windows at the end of some frames by the BS and/or some designated CPEs • Monitored by BSs and other CPEs from same and different cells on same channel or different channel for future channel switching • Signals IP address of BS and CPE every 15 min. as asked by R&O Coexistence Beacon Protocol (CBP) burst Submission 30 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Inter-WRAN Communications Scenarios (Require Neighbor-cell CPEs to exist) • The “face-to-face CPEs” case: Submission • The “back-to-back CPEs” case: 31 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 Outline 1. The IEEE 802. 22 WRAN Standard 2. Coexistence among communication systems in TV White Space a) b) c) d) e) 3. Protection of TV broadcasting Protection of Part 74 wireless microphones 802. 22. 1 wireless microphone beacon Quiet periods for sensing Self-coexistence among WRAN systems Further observations a) b) Submission DTV coverage protection RF mask 32 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 DTV Coverage: Athen, GA Noise Limited Contour News Corporation’s Fox Technology Group’s propagation prediction software: 22 -05 -0083 -00 -0000 -tv-simulation-results. doc Submission 33 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 802. 22 RF Mask 4 Watt EIRP 33 d. B Rejection if microphones in 1 st adjacent channel 1 d. B DTV RX desensitization Submission 34 Gerald Chouinard, CRC

doc. : sg-whitespace 09 -0058 r 2 March 2009 References 1. 2. IEEE P 802. 22™/ DRAFTv 1. 0 Draft Standard for Wireless Regional Area Networks Part 22: Cognitive Wireless RAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Policies and procedures for operation in the TV Bands, April 2008 FCC R&O 08 -260 Submission 35 Gerald Chouinard, CRC