1. doc.: IEEE 802.11-11/0489r0 Submission March 2011 Steve Shellhammer, Qualcomm Inc.Slide 1 Wideband PHY Channel Availability Date: 2011-03-29 Authors:

2. doc.: IEEE 802.11-11/0489r0 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

3. doc.: IEEE 802.11-11/0489r0 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.

4. doc.: IEEE 802.11-11/0489r0 Submission Goal It may be reasonable to restrict BW operation to only 5MHz in 802.11af 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

5. doc.: IEEE 802.11-11/0489r0 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

6. doc.: IEEE 802.11-11/0489r0 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 80+80 in 802.11ac TV Channel Usage Requires two adjacent TV channelsRequires two non-adjacent TV channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 6

7. doc.: IEEE 802.11-11/0489r0 Submission Options for 20 MHz WLAN Channels Option #1Option #2Option #3 Label2010+105+5+5+5 WLAN PHY 20 MHz PHY Approach used in Current Draft Multicarrier PHY Use two non-adjacent 10MHz carriers Similar to 80+80 in 802.11ac 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

8. doc.: IEEE 802.11-11/0489r0 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

9. doc.: IEEE 802.11-11/0489r0 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

10. doc.: IEEE 802.11-11/0489r0 Submission Portable Networks – Number of 10 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 10

11. doc.: IEEE 802.11-11/0489r0 Submission Portable Networks – Number of 20 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 11

12. doc.: IEEE 802.11-11/0489r0 Submission Portable Networks – Average Number of WLAN Channels Average (Mean) number of 10/20 MHz WLAN Channels PHYMean Number of 10 MHz WLAN Channels 105.4 5+58.4 PHYMean Number of 20 MHz WLAN Channels 201.4 10+102.5 5+5+5+54.0 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 12

13. doc.: IEEE 802.11-11/0489r0 Submission Fixed/Portable Nets – Number of 10 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 13

14. doc.: IEEE 802.11-11/0489r0 Submission Fixed/Portable Nets – Number of 20 MHz WLAN Channels March 2011 Steve Shellhammer, Qualcomm Inc.Slide 14

15. doc.: IEEE 802.11-11/0489r0 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 102.2 5+53.6 PHYMean Number of 20 MHz WLAN Channels 200.68 10+100.93 5+5+5+51.5 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 15

16. doc.: IEEE 802.11-11/0489r0 Submission Conclusions 20 MHz WLAN Channels –Very unlikely to have 20 MHz continuous –Must use either 10+10 PHY or 5+5+5+5 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

17. doc.: IEEE 802.11-11/0489r0 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-2009-3, January 11, 2009 (available at http://www.eecs.berkeley.edu/Pubs/TechRpts/2009/EECS-2009- 3.html) http://www.eecs.berkeley.edu/Pubs/TechRpts/2009/EECS-2009- 3.html Steve Shellhammer, Qualcomm Inc.Slide 17 March 2011

18. doc.: IEEE 802.11-11/0489r0 Submission Annex Study of 50 Largest Cities in the US March 2011 Steve Shellhammer, Qualcomm Inc.Slide 18

19. doc.: IEEE 802.11-11/0489r0 Submission Portable 10 MHz Channel Results – Cities 1-20 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) New York1000123 Los Angeles9000413 Chicago6060136 Houston7701014 Phoenix8501346 Philadelphia1910323 San Antonio7820335 San Diego9210579 Dallas7520103 San Jose9511212 Detroit4820346 San Francisco9400201 Jacksonville3220578 Indianapolis4620127 Austin7870467 Columbus4320458 Fort Worth7610503 Charlotte2820246 Memphis3810358 Boston0210825 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 19

20. doc.: IEEE 802.11-11/0489r0 Submission Portable 10 MHz Channel Results – Cities 21-40 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Baltimore2120435 El Paso79901911 Seattle9811048 Denver9810148 Nashville3720189 Milwaukee5320267 Washington2000134 Las Vegas8910314 Louisville4020259 Portland9720169 Oklahoma City7310268 Tucson8570837 Atlanta3030555 Albuquerque8710236 Kansas City6410178 Fresno9370179 Mesa8520235 Sacramento9581567 Long Beach9080225 Omaha68104810 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 20

21. doc.: IEEE 802.11-11/0489r0 Submission Portable 10 MHz Channel Results – Cities 41-50 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Virginia Beach2345159 Miami3310914 Cleveland4410258 Oakland9460101 Raleigh2760546 Colorado Springs8090425 Tulsa7410468 Minneapolis5540179 Arlington7600203 Honolulu9681347 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 21

22. doc.: IEEE 802.11-11/0489r0 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 (5+5+5+5) New York10001011 Los Angeles90004001 Chicago60601013 Houston77010002 Phoenix85013123 Philadelphia19103011 San Antonio78203012 San Diego92105234 Dallas75201001 San Jose95112001 Detroit48203123 San Francisco94002000 Jacksonville32205234 Indianapolis46201013 Austin78704133 Columbus43204124 Fort Worth76105001 Charlotte28202023 Memphis38103024 Boston2108012 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 22

23. doc.: IEEE 802.11-11/0489r0 Submission Portable 20 MHz Channel Results – Cities 21-40 CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels (5+5+5+5) Baltimore21204012 El Paso79901345 Seattle98110124 Denver98101124 Nashville37201344 Milwaukee53202133 Washington20001012 Las Vegas89103002 Louisville40202124 Portland97201134 Oklahoma City73102134 Tucson85708013 Atlanta30305122 Albuquerque87102113 Kansas City64101034 Fresno93701234 Mesa85202012 Sacramento95815233 Long Beach90802012 Omaha68104345 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 23

24. doc.: IEEE 802.11-11/0489r0 Submission Portable 20 MHz Channel Results – Cities 41-50 CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels (5+5+5+5) Virginia Beach23451124 Miami33109002 Cleveland44102124 Oakland94601000 Raleigh27605123 Colorado Springs80904012 Tulsa74104134 Minneapolis55401134 Arlington76002001 Honolulu96813023 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 24

25. doc.: IEEE 802.11-11/0489r0 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 York1000100 Los Angeles9000400 Chicago6060100 Houston7701000 Phoenix8501312 Philadelphia1910300 San Antonio7820301 San Diego9210545 Dallas7520100 San Jose9511200 Detroit4820311 San Francisco9400200 Jacksonville3220523 Indianapolis4620122 Austin7870411 Columbus4320422 Fort Worth7610500 Charlotte2820200 Memphis3810302 Boston210800 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 25

26. doc.: IEEE 802.11-11/0489r0 Submission Fixed/Portable 10 MHz Channel Results – Cities 21-40 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Baltimore2120400 El Paso7990167 Seattle9811011 Denver9810111 Nashville3720144 Milwaukee5320201 Washington2000100 Las Vegas8910300 Louisville4020244 Portland9720111 Oklahoma City7310201 Tucson8570811 Atlanta3030511 Albuquerque8710211 Kansas City6410100 Fresno9370123 Mesa8520200 Sacramento9581512 Long Beach9080200 Omaha6810445 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 26

27. doc.: IEEE 802.11-11/0489r0 Submission Fixed/Portable 10 MHz Channel Results – Cities 41-50 CityZip CodeNumber of 10 MHz Channels (10) Number of 10 MHz Channels (5+5) Virginia Beach2345112 Miami3310900 Cleveland4410200 Oakland9460100 Raleigh2760512 Colorado Springs8090400 Tulsa7410411 Minneapolis5540122 Arlington7600200 Honolulu9681301 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 27

28. doc.: IEEE 802.11-11/0489r0 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 (5+5+5+5) New York10001000 Los Angeles90004000 Chicago60601000 Houston77010000 Phoenix85013001 Philadelphia19103000 San Antonio78203000 San Diego92105122 Dallas75201000 San Jose95112000 Detroit48203000 San Francisco94002000 Jacksonville32205011 Indianapolis46201011 Austin78704000 Columbus43204111 Fort Worth76105000 Charlotte28202000 Memphis38103001 Boston2108000 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 28

29. doc.: IEEE 802.11-11/0489r0 Submission Fixed/Portable 20 MHz Channel Results – Cities 21-40 CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels (5+5+5+5) Baltimore21204000 El Paso79901333 Seattle98110000 Denver98101000 Nashville37201122 Milwaukee53202000 Washington20001000 Las Vegas89103000 Louisville40202122 Portland97201000 Oklahoma City73102000 Tucson85708000 Atlanta30305000 Albuquerque87102000 Kansas City64101000 Fresno93701111 Mesa85202000 Sacramento95815001 Long Beach90802000 Omaha68104122 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 29

30. doc.: IEEE 802.11-11/0489r0 Submission Fixed/Portable 20 MHz Channel Results – Cities 41-50 CityZip CodeNumber of 20 MHz Channels (20) Number of 20 MHz Channels (10+10) Number of 20 MHz Channels (5+5+5+5) Virginia Beach23451001 Miami33109000 Cleveland44102000 Oakland94601000 Raleigh27605001 Colorado Springs80904000 Tulsa74104000 Minneapolis55401111 Arlington76002000 Honolulu96813000 March 2011 Steve Shellhammer, Qualcomm Inc.Slide 30