doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 1 Wireless Microphone Sensing IEEE P Wireless RANs Date: Authors: Notice: This document has been prepared to assist IEEE 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 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 Chairhttp://standards.ieee.org/guides/bylaws/sb-bylaws.pdf Carl R. StevensonCarl 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 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at >

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 2 Time to validate Operational channel: 2 s Backup channels: 6 s Channel availability Check Time: –A candidate channel needs to have been available for 30 seconds before becoming a backup channel Detection and confirmation of incumbent –If presence of incumbent is detected by BS or CPEs and confirmed by the BS, the entire cell moves to the first backup channel or the CPEs where it was detected are dissallowed from the network –In the case of a backup channel, this channel is returned to the “null” set unless the CPEs where incumbents were detected are to be dissallowed from the use of this channel when it becomes the operating channel.

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 3 Operational channel availability check Co-channel validation (N) –Wireless microphone protection level: Functional Requirement Document: 20 dB(uV/m) (equivalent to the field strength produced by a CPE at 10 m with an emission level of 4.8 uV/m at 3 m in 120 kHz) Calculations: 32.7 dB(uV/m) (see next slide) Functional Requirement Document is too restrictive by 12.7 dB

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 4 Maximum field strength allowed before interference to wireless microphones

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 5 WRAN coverage and co-channel operation with wireless microphones R1 R2 Minimum WRAN field strength: 28.8 dB(uV/m) Δ att_1.5m/10m dB(uV/m) Area where, if wireless microphones are present, the BS cannot operate on the same TV channel Area where, if wireless microphones are present, the nearby CPEs need to either change frequency or reduce their transmit power Edge of coverage of the WRAN BS (e.g., 17 km for 4 W EIRP, 31 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 R1 R2 F(50, 99.9) F(50, 10)

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 6 Operational channel availability check Co-channel validation (N) 1.Co-channel sensing needs to be done during quiet periods on channel N, and possibly on channels N+/-1 if WRAN operation exists (see leakage from WRAN out-of-band emission on adjacent channels in next slides) 2.Where do we consider the effect of poor channel selectivity on the RF sensing path that would mask incumbent on channel N because of IF filter leakage from N+\-1? 3.Base station cannot operate co-channel if there is a wireless microphone operation within R 1 from the BS 4.For distance larger than R 1 from the base station, CPEs need to reduce power or change frequency if they are within R 2 from a wireless microphone operation to protect it 5.For smaller distances from a wireless microphone operation, CPEs cannot reduce power sufficiently to keep contact with the base station and need to change frequency

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 7 Operational channel availability check Adjacent channel validation (N+\-1) –Interference can be generated from WRAN signal emission in the adjacent channels –Extent of interference will depend on the allowed WRAN out-of-band emission in the adjacent channels –WRAN RF Mask considerations =>

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 8 WRAN RF Mask

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 9 WRAN RF Mask

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 10 WRAN RF Mask

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 11 WRAN RF Mask

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 12 WRAN RF Mask

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 13 WRAN coverage and adjacent-channel operation with wireless microphones 28.8 dB(uV/m) Δ att _1.5m/10m dB(uV/m) Area where, if wireless microphones are detected, the BS cannot operate on the adjacent TV channel Area where, if wireless microphones are detected, the nearby CPEs need to either change frequency or reduce their transmit power Edge of coverage edge of the WRAN BS (e.g., 17 km for 4 W EIRP, 31 km for 100 W EIRP) Area where CPEs need to reduce their transmit power as a function of their distance to the wireless microphone operation or change frequency Wireless microphone operation Assuming 33 dB as for the FCC Mask R4 R3

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 14 Operational channel availability check Adjacent channel validation (N+\-1) 1.Adjacent channel sensing for TG1 beacon and wireless microphone is needed to protect incumbent operation from WRAN out-of-band emission in adjacent channels 2.Sensing needs to be done during quiet periods on channel N, and possibly on channels N+/-2 if WRAN operation exists to avoid incumbents being masked by WRAN signal spill-over from either side [Is there a place where N+2 can still operate without interfering with incumbent on N+1but would mask this operation where the CPE on N is located?] 3.Where do we consider the effect of poor channel selectivity on the RF sensing path that would mask incumbent on channel K because of IF filter leakage from signal on K+\-1?

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 15 Operational channel availability check Adjacent channel validation (N+\-1) 4.Base station cannot operate on N if there is wireless microphone operation on N+/-1 within R 3 from the BS 5.For distances larger than R 3 from the BS, CPEs need to reduce power or change frequency if it is within R 4 from wireless microphone operation to protect it from CPE spill-over 6.For smaller distances from wireless microphone operation, CPEs cannot reduce power sufficiently to keep contact with the base station and need to change frequency

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 16 Backup channels availability check Co-channel validation (K) 1.Co-channel sensing needs to be done during quiet periods on channel K, and possibly on channels K+/-1 if WRAN operation exists (see leakage from WRAN out-of-band emission on adjacent channels in previous slides) 2.Where do we consider the effect of poor channel selectivity on the RF sensing path that would mask incumbent on channel K because of IF filter leakage from K+\-1? 3.Base station will not be able to operate co-channel if a wireless microphone operation is within R 1 from the BS 4.For distances larger than R 1 from the base station, CPEs will need to reduce power or change frequency if they are within R 2 from wireless microphone operation to protect it 5.For smaller distance from wireless microphone operation, CPE cannot reduce power sufficiently to keep contact with the base station and will need to change frequency

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 17 Backup channel availability check Adjacent channel validation (K+\-1) 1.Adjacent channel sensing for TG1 beacon and wireless microphone is needed to protect incumbent operation from eventual WRAN out-of-band emission in adjacent channels 2.Sensing needs to be done during quiet periods on channel K, and possibly on channels K+/-2 if WRAN operation exists to avoid incumbents being masked by WRAN signal spill-over from either side [Is there a place where K+2 can still operate without interfering with incumbent on K+1but would mask this operation where the CPE on K is located?] 3.Where do we consider the effect of poor channel selectivity on the RF sensing path that would mask incumbent on channel K because of IF filter leakage from signal on K+\-1?

doc.: IEEE /0530r1 Submission November 2007 Gerald Chouinard, CRCSlide 18 Backup channel availability check Adjacent channel validation (K+\-1) 4.Base station will not be able to operate on K if there is wireless microphone operation on K+/-1 within R 3 from the BS 5.For distances larger than R 3 from the BS, CPEs will need to reduce power or change frequency if they are within R 4 from a wireless microphone operation to protect it from CPE spill- over 6.For smaller distances from wireless microphone operation, CPEs cannot reduce power sufficiently to keep contact with the base station and will need to change frequency