Doc.: IEEE 802.11-08/0362r0 Submission March 2008 Hanbyeog Cho (ETRI)Slide 1 Spectrum Mask in IEEE802.11p Date: 2008-03-18 Authors:

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Presentation transcript:

doc.: IEEE /0362r0 Submission March 2008 Hanbyeog Cho (ETRI)Slide 1 Spectrum Mask in IEEE802.11p Date: Authors:

doc.: IEEE /0362r0 SubmissionHanbyeog Cho (ETRI)Slide 2 Abstract We present the spectrum mask based on the FCC rule. WAVE system specification has mismatched spectrum masks. It means that PER(packet error rates) will be increased due to channel interference between adjacent channels. This presentation is a following work to the presentation by Vinuth Rai &John Kenny last San Fransisco meeting (17 July, 2008) The main focus is on the spectrum mask related FCC rule and the spectrum mask should fulfill [55+10log(P)], -25dBm criteria Then proposed spectrum mask will decrease the interference between adjacent channels March 2008

doc.: IEEE /0362r0 Submission March 2008 Hanbyeog Cho (ETRI)Slide 3 Contents Introduction Cross-Channel Interference Wave Regulation Spectrum Mask

doc.: IEEE /0362r0 Submission Introduction This presentation is relating to the presentation by Vinuth Rai &John Kenny last San Fransisco meeting(17 July, 2008)This presentation is relating to the presentation by Vinuth Rai &John Kenny last San Fransisco meeting(17 July, 2008) – p-cross-channel-interference-test-results-a-report-from- the-vsc-a-project.ppt Main focus : Interference adjacent channelMain focus : Interference adjacent channel –Spectrum Mask to fulfill [55+10log(P)], -25dBm criteria March 2008 Slide 4Hanbyeog Cho (ETRI)

doc.: IEEE /0362r0 Submission March 2008 Slide 5Hanbyeog Cho (ETRI) Cross-Channel Interference Effect of cross-channel interferenceEffect of cross-channel interference - Transmit power & channel allocation  cross-channel interference - Increasing PER - Solution  Need sharp spectrum mask Ce = Co – CiCe = Co – Ci - Ce : Total available channel - Co : Original channel - Ci : Channel interference Channel 2 CeCe CiCi CiCi CiCi CiCi Channel 1 Channel 3 Interference

doc.: IEEE /0362r0 Submission March 2008 Slide 6Hanbyeog Cho (ETRI) Cross-Channel Interference : Example – Using WAVE Toyota ITC test Result : Adjacent interference - Tx Channel : Interferer Channel: 174 RX-Interferer Distance (meters) 600% 400%10% 300%1%80% 250.5%80%99% 2040%90%100% 150%1%40%92%95%100% %1.50%70%98%100% %35%99%100% 7.515%95%100% 555%98%100% 2.595%100% Legend: PER > 10% RX-TX Distance (meters) □Toyota ITC test Result : Non-adjacent interfer - Tx Channel : Control Channel: 178 □Cross-channel interference test results - Adjacent channel interference. Packet Error: [Tx-Rx distance] / [Int-Rx distance] > 10 if [P Tx =P Rx ] - Non-adjacent channel interference. Less importance

doc.: IEEE /0362r0 Submission March 2008 Slide 7Hanbyeog Cho (ETRI) Wave Regulation Device classMaximum device output power Class A0 (dBm)1mW Class B10 (dBm)10mW Class C20 (dBm)100mW Class D28.8 (dBm)750mW Device class Reduction in Power Spectral Density, dBr  4.5MHz Offset  5.0Mhz Offset  5.5MHz Offset  10MHz Offset  15MHz Offset Class A Class B Class C Class D □Device classes and Tx power levels □Wave spectrum mask

doc.: IEEE /0362r0 Submission March 2008 Slide 8Hanbyeog Cho (ETRI) IEEE p Spectrum Mask IEEE p/D1.1 Class  4.5M Hz Offset  5.0M hz Offset  5.5MHz Offset  10MHz Offset  15MHz Offset Class A Class B Class C Class D □Spectrum Mask using 55+10log(P), -25dBm

doc.: IEEE /0362r0 Submission Spectrum Mask Offset Frequency(MHz) Power Attenuation(dBr) Class A Offset Frequency(MHz) Power Attenuation(dBr) Class B Class C Offset Frequency(MHz) Power Attenuation(dBr) Class D Offset Frequency(MHz) Power Attenuation(dBr) □IEEE p vs IEEE p/D1.1 March 2008 Slide 9Hanbyeog Cho (ETRI)

doc.: IEEE /0362r0 Submission March 2008 Hanbyeog Cho (ETRI)Slide 10 Conclusions We proposed basic spectrum masks to fulfill the FCC regulation rule. A present WAVE system specification has mismatched spectrum masks. It means that PER(packet error rates) will be increased due to channel interference between adjacent channels. This presentation is a following work to the presentation by Vinuth Rai &John Kenny last San Francisco meeting (17 July, 2008) The proposed spectrum mask will decrease the interference between adjacent channels Then the main focus is on the spectrum mask related FCC rule and the spectrum mask should be modified to fulfill [55+10log(P)], -25dBm criteria.