doc.: IEEE /0489r0 Submission March 2011 Steve Shellhammer, Qualcomm Inc.Slide 1 Wideband PHY Channel Availability Date: Authors:

doc.: IEEE /0489r0 SubmissionSteve Shellhammer, Qualcomm Inc.Slide 2 Abstract There are several methods to obtain wideband PHY operation in the TVWS: wideband PHY and multicarrier PHY. This presentation provides a study of how many wideband WLAN channels are available in the TVWS using each of these two approaches March 2011

doc.: IEEE /0489r0 Submission Comment IDs CIDCID13, CID14, CID18, CID76, CID80, CID89, CID103, CID154, CID235, CID239, CID240, CID263, CID264, CID266, CID334, CID478, CID479, CID480, CID481, CID523, CID526, CID548, CID575, CID621, CID629, CID637, CID649, CID652, CID681, CID733, CID738, CID748, CID754, CID797, CID806, CID810, CID832, CID870, CID885, CID921, CID976, CID1003, CID1005, CID1193, CID1197, CID1198, CID1199, CID1291, CID1292, CID1295, CID1296, CID1300, CID1302 CommentComments about 5/10/20 MHz PHY Design March 2011 Slide 3Steve Shellhammer, Qualcomm Inc.

doc.: IEEE /0489r0 Submission Goal It may be reasonable to restrict BW operation to only 5MHz in af For use cases that require higher throughput, higher levels of BW may be required How best to achieve these higher BW modes? Need also to consider carrier sense of wideband PHY modes for coexistence between different BW PHYs March 2011 Steve Shellhammer, Qualcomm Inc.Slide 4

doc.: IEEE /0489r0 Submission Outline Options for 10 MHz and 20 MHz WLAN channels White space availability for 10 MHz and 20 MHz channels – Study across all zip codes in the United States –Portable Networks –Fixed/Portable Networks Conclusions Annex –Study for 50 largest cities in the United States White space availability for 10 MHz and 20 MHz channels Study for both Portable and Fixed/Portable Networks March 2011 Steve Shellhammer, Qualcomm Inc.Slide 5

doc.: IEEE /0489r0 Submission Options for 10 MHz WLAN Channels Option #1Option #2 Label105+5 WLAN PHY10 MHz PHY Approach used in Current Draft Multicarrier PHY Use two non-adjacent 5 MHz carriers Similar to in ac TV Channel Usage Requires two adjacent TV channelsRequires two non-adjacent TV channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 6

doc.: IEEE /0489r0 Submission Options for 20 MHz WLAN Channels Option #1Option #2Option #3 Label WLAN PHY 20 MHz PHY Approach used in Current Draft Multicarrier PHY Use two non-adjacent 10MHz carriers Similar to in ac Multicarrier PHY Use four non-adjacent 5MHz carriers TV Channel Usage Requires four adjacent TV channels Requires two pairs of two adjacent TV channels Requires four non-adjacent TV channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 7

doc.: IEEE /0489r0 Submission Wideband Channel Availability Study Obtained FCC standard power TV database Obtained low-power TV database (by zip code) Calculated which TV channels are available for each zip code in the United States –Networks of portable devices –Networks of fixed/portable devices Our analysis agrees well with UC Berkeley analysis [1] – Our analysis has been updated based on the final FCC R&O Calculated the number of WLAN channels for each of the options, for a typical user This number is a random variable Plotted the CDF of the number of available WLAN channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 8

doc.: IEEE /0489r0 Submission Number of 10 MHz WLAN Channels Calculate the population that has N 10 MHz channels –Perform calculation for both Option #1 and #2 The probability that a user has N 10MHz WLAN channels is that population divided by the total US population –By calculating for each value of n we can obtain the probability mass function for N – P N (n) –Convert from probability mass function (PMF) into the cumulative distribution function (CDF) and plot Same approach for 20 MHz WLAN Channels –Consider Options #1, #2, #3 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 9

doc.: IEEE /0489r0 Submission Portable Networks – Number of 10 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 10

doc.: IEEE /0489r0 Submission Portable Networks – Number of 20 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 11

doc.: IEEE /0489r0 Submission Portable Networks – Average Number of WLAN Channels Average (Mean) number of 10/20 MHz WLAN Channels PHYMean Number of 10 MHz WLAN Channels PHYMean Number of 20 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 12

doc.: IEEE /0489r0 Submission Fixed/Portable Nets – Number of 10 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 13

doc.: IEEE /0489r0 Submission Fixed/Portable Nets – Number of 20 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 14

doc.: IEEE /0489r0 Submission Fixed/Portable Nets – Average Number of WLAN Channels Average (Mean) number of 10/20 MHz WLAN Channels PHYMean Number of 10 MHz WLAN Channels PHYMean Number of 20 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 15

doc.: IEEE /0489r0 Submission Conclusions 20 MHz WLAN Channels –Very unlikely to have 20 MHz continuous –Must use either PHY or PHY –10+10 PHY will have carrier sense coexistence problems with 5MHz PHY –5+5 PHY will not have carrier sense coexistence problem with 5MHz PHY 10 MHz WLAN Channels –Reasonable number of 10 MHz channels using adjacent channels –10 MHz PHY will have carrier sense coexistence problem with 5MHz PHY –If we use 5+5 PHY there are about 50% more 10MHz channels, on the average –5+5 PHY will not have carrier sense coexistence problem with 5MHz PHY March 2011 Steve Shellhammer, Qualcomm Inc.Slide 16

doc.: IEEE /0489r0 Submission References 1.Mubaraq Mishra and Anant Sahai, “How much white space is there?” EECS Department, University of California, Berkeley, Technical Report No. UCB/EECS , January 11, 2009 (available at 3.html) 3.html Steve Shellhammer, Qualcomm Inc.Slide 17 March 2011

doc.: IEEE /0489r0 Submission Annex Study of 50 Largest Cities in the US March 2011 Steve Shellhammer, Qualcomm Inc.Slide 18

doc.: IEEE /0489r0 Submission Portable 10 MHz Channel Results – Cities 1-20 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) New York Los Angeles Chicago Houston Phoenix Philadelphia San Antonio San Diego Dallas San Jose Detroit San Francisco Jacksonville Indianapolis Austin Columbus Fort Worth Charlotte Memphis Boston March 2011 Steve Shellhammer, Qualcomm Inc.Slide 19

doc.: IEEE /0489r0 Submission Portable 10 MHz Channel Results – Cities CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Baltimore El Paso Seattle Denver Nashville Milwaukee Washington Las Vegas Louisville Portland Oklahoma City Tucson Atlanta Albuquerque Kansas City Fresno Mesa Sacramento Long Beach Omaha March 2011 Steve Shellhammer, Qualcomm Inc.Slide 20

doc.: IEEE /0489r0 Submission Portable 10 MHz Channel Results – Cities CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Virginia Beach Miami Cleveland Oakland Raleigh Colorado Springs Tulsa Minneapolis Arlington Honolulu March 2011 Steve Shellhammer, Qualcomm Inc.Slide 21

doc.: IEEE /0489r0 Submission Portable 20 MHz Channel Results – Cities 1-20 CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels ( ) New York Los Angeles Chicago Houston Phoenix Philadelphia San Antonio San Diego Dallas San Jose Detroit San Francisco Jacksonville Indianapolis Austin Columbus Fort Worth Charlotte Memphis Boston March 2011 Steve Shellhammer, Qualcomm Inc.Slide 22

doc.: IEEE /0489r0 Submission Portable 20 MHz Channel Results – Cities CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels ( ) Baltimore El Paso Seattle Denver Nashville Milwaukee Washington Las Vegas Louisville Portland Oklahoma City Tucson Atlanta Albuquerque Kansas City Fresno Mesa Sacramento Long Beach Omaha March 2011 Steve Shellhammer, Qualcomm Inc.Slide 23

doc.: IEEE /0489r0 Submission Portable 20 MHz Channel Results – Cities CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels ( ) Virginia Beach Miami Cleveland Oakland Raleigh Colorado Springs Tulsa Minneapolis Arlington Honolulu March 2011 Steve Shellhammer, Qualcomm Inc.Slide 24

doc.: IEEE /0489r0 Submission Fixed/Portable 10 MHz Channel Results – Cities 1-20 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) New York Los Angeles Chicago Houston Phoenix Philadelphia San Antonio San Diego Dallas San Jose Detroit San Francisco Jacksonville Indianapolis Austin Columbus Fort Worth Charlotte Memphis Boston March 2011 Steve Shellhammer, Qualcomm Inc.Slide 25

doc.: IEEE /0489r0 Submission Fixed/Portable 10 MHz Channel Results – Cities CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Baltimore El Paso Seattle Denver Nashville Milwaukee Washington Las Vegas Louisville Portland Oklahoma City Tucson Atlanta Albuquerque Kansas City Fresno Mesa Sacramento Long Beach Omaha March 2011 Steve Shellhammer, Qualcomm Inc.Slide 26

doc.: IEEE /0489r0 Submission Fixed/Portable 10 MHz Channel Results – Cities CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Virginia Beach Miami Cleveland Oakland Raleigh Colorado Springs Tulsa Minneapolis Arlington Honolulu March 2011 Steve Shellhammer, Qualcomm Inc.Slide 27

doc.: IEEE /0489r0 Submission Fixed/Portable 20 MHz Channel Results – Cities 1-20 CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels ( ) New York Los Angeles Chicago Houston Phoenix Philadelphia San Antonio San Diego Dallas San Jose Detroit San Francisco Jacksonville Indianapolis Austin Columbus Fort Worth Charlotte Memphis Boston March 2011 Steve Shellhammer, Qualcomm Inc.Slide 28

doc.: IEEE /0489r0 Submission Fixed/Portable 20 MHz Channel Results – Cities CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels ( ) Baltimore El Paso Seattle Denver Nashville Milwaukee Washington Las Vegas Louisville Portland Oklahoma City Tucson Atlanta Albuquerque Kansas City Fresno Mesa Sacramento Long Beach Omaha March 2011 Steve Shellhammer, Qualcomm Inc.Slide 29

doc.: IEEE /0489r0 Submission Fixed/Portable 20 MHz Channel Results – Cities CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels ( ) Virginia Beach Miami Cleveland Oakland Raleigh Colorado Springs Tulsa Minneapolis Arlington Honolulu March 2011 Steve Shellhammer, Qualcomm Inc.Slide 30