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Doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 1 802.22 Presentation to the ECSG on White Space Author: Notice: This document.

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Presentation on theme: "Doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 1 802.22 Presentation to the ECSG on White Space Author: Notice: This document."— Presentation transcript:

1 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 1 802.22 Presentation to the ECSG on White Space Author: 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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.http://standards.ieee.org/guides/bylaws/sb-bylaws.pdfCarl R. Stevensonpatcom@ieee.org 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.

2 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 2 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

3 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 3 IEEE 802.22 RAN Regional Area Network IEEE Standards 30 km 54 - 862 MHz Multipath absorption Window (Cyclic prefix ) 0.25 2.2 μsec 0.8 37 μsec 23 Mbit/s BW= 6,7,8 MHz

4 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 4 Rural Broadband: - Cable-modem / ADSL - WiFi hot-spots in ISM bands - Higher power, lower frequency broadband access system 30 km 23 km 16 km MAC Long round-trip delays QPSK 16-QAM 64-QAM PHY Adaptive modulation - Medium power wireless systems 5 km

5 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 5 Typical CPE installation (Fixed) Sensing antenna GPS antenna TX/RX WRAN Antenna

6 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 6 802.22 Frame Structure Superframe = 160 ms Frame = 10 ms Superframe =16 frames

7 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 7 802.22 Reference Architecture

8 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 8 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

9 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 9 Coexistence among communications systems in TV White Space Self- coexistence

10 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 10 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

11 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 11 WRAN CPE and DTV protection DTV WRAN

12 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 12 DTV TX (1 MW ERP, 300 m) 118 km 41 dB(uV/m) F(50, 90) 4 W WRAN Base Station 16.8 km 16.2 km 4 W WRAN base station keep-out distance 36.3 dB(uV/m) WRAN keep-out distance: Minimum field strength: 41 dB(uV/m) Protection ratio: 23 dB CPE antenna front-to-back: 14 dB Interfering field strength: 32 dB(uV/m) Co-channel keep-out distance between DTV and 802.22 WRAN Geolocation & Database 134.2 km

13 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 13 TV sensing techniques studied by 802.22 Blind –Energy detection –Eigenvalue sensing (I2R) Multi-resolution (MRSS) Spectral correlation –Sensing for one TV band –Sensing procedure for TV signals –Sensing for multiple TV channel band Selection of frequency components: emphasizing near Parts with abrupt changes ATSC cyclostationary sensing technique Signal specific – ATSC Sequence correlation sensing ATSC signature Pilot recovery Single ATSC data field Multiple ATSC data fields Sync segment – ATSC FFT-based Pilot sensing (Philips) – ATSC Pilot sensing technique using high order statistics – ATSC PLL-based Pilot sensing technique Dual FPLL pilot sensing – ATSC Pilot covariance sensing technique Covariance based sensing – Higher order statistics based pilot detection

14 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 14 DTV Broadcast Incumbent Sensing ATSC FFT-based Pilot Sensing Technique (Philips) 1 ms sensing window will allow a 32-point FFT while a 5 ms window will allow a 256-point FFT FFT applied around the pilot carrier

15 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 15 DTV Broadcast Incumbent Sensing Sensing techniques performance comparison

16 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 16 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

17 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 17 WRAN coverage and co-channel operation with wireless microphones R1 R2 Minimum WRAN field strength: 29 dB(uV/m) Edge of coverage of the WRAN BS (e.g., 17 km for 4 W EIRP, 30 km for 100 W EIRP) Area where CPEs need to change frequency Area where CPEs need to reduce their transmit power as a function of their distance to the wireless microphone operation Wireless microphone operation R2 F(50, 99.9) F(50, 10)

18 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 18 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

19 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 19 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

20 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 20 802.22.1 Beacon Design Inter-beacon networking period I-channel Q-channel 3.33 ms 98 ms - Source address - Location - subchannel map - signature - certificate 101 ms frame

21 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 21 802.22.1 Beacon Design PPDU (101 octets) Location Signature Certificate

22 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 22 Detection of the 802.22.1 beacon -114 dBm

23 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 23 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

24 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 24 802.22 Frame Structure Superframe = 160 ms Frame = 10 ms Superframe =16 frames

25 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 25 802.22 Frame Structure Frame quiet period: 5.1 ms Superframe = 160 ms Frame = 10 ms Superframe =16 frames

26 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 26 802.22 Superframe Structure Multi-frame quiet periods

27 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 27 802.22 Superframe Structure Superframe quiet period: up to 158 ms

28 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 28 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

29 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 29 WRAN Self-coexistence considerations Different TV channel selection for operational channel and first backup channel Frame allocation signalled by the superframe control header (SCH) MAC self-coexistence schemes PHY coexistence mechanisms

30 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 30 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

31 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 31 Inter-WRAN Communications Scenarios (Require Neighbor-cell CPEs to exist) The face-to-face CPEs case: The back-to-back CPEs case:

32 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 32 Outline 1.The IEEE 802.22 WRAN Standard 2.Coexistence among communication systems in TV White Space a)Protection of TV broadcasting b)Protection of Part 74 wireless microphones c)802.22.1 wireless microphone beacon d)Quiet periods for sensing e)Self-coexistence among WRAN systems 3.Further observations a)DTV coverage protection b)RF mask

33 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 33 DTV Coverage: Athen, GA News Corporations Fox Technology Groups propagation prediction software: 22-05-0083-00-0000-tv-simulation-results.doc Noise Limited Contour DTV Coverage: Athen, GA

34 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 34 802.22 RF Mask 1 dB DTV RX desensitization 4 Watt EIRP Rejection if microphones in 1st adjacent channel 33 dB

35 doc.: sg-whitespace 09-0058r2 Submission March 2009 Gerald Chouinard, CRCSlide 35 References 1.IEEE P802.22/ DRAFTv1.0 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 2.FCC R&O 08-260

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