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doc. : 11 -14 -1199 -00 -00 ax Sept 2014 Effect of CCA in

doc. : 11 -14 -1199 -00 -00 ax Sept 2014 Effect of CCA in residential scenario part 2 Date: 2014 -09 -15 Authors: Submission Slide 1

September 2014 doc. : 11 -14 -1199 -00 -00 ax Indroduction • Multiple IEEE

September 2014 doc. : 11 -14 -1199 -00 -00 ax Indroduction • Multiple IEEE presentations have looked at the effects of CCA levels – Several presentations have noted that higher CCAs have higher mean and 5% tputs than lower CCAs • Note: Baselines of both CCA = -82 and CCA= -92 have been used • At the June IEEE meeting, we presented results for various CCA levels using a reuse 1 residential scneario – document 11 -14 -0846 – We found that higher CCA levels were often harmful for the 5% point • In this presentation we look at the residential scenario for reuse 3 and 6 Submission Slide 2 Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Simulation Setting I •

September 2014 doc. : 11 -14 -1199 -00 -00 ax Simulation Setting I • Residential Scenario – IEEE residential scenario baseline Example of one drop • Less apartments modelled for faster run times – Expect conclusions will not change Floor 1 – 2 x 5 x 3 apartments – 30 APs • 150 STAs (5 STAs per AP) – Pathloss as specified in 11 ax Simulation Scenarios document – Reuse-3: 3 x 80 MHz channel – Reuse-6: 6 x 40 MHz channel Floor 2 • Note: all results are generated by simulating 80 MHz BSS and then are appropriately scaled – Results averaged over multiple random drops of APs and STAs locations Floor 3 Submission Slide 3 Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Simulation Setting II •

September 2014 doc. : 11 -14 -1199 -00 -00 ax Simulation Setting II • Simulation Details: – UL only Data traffic (+ DL ACKs) – Full buffer UDP – Default Tx Power: 20 d. Bm per antenna (AP), 15 d. Bm ( STA) – Antenna Gain: 0 d. Bi APs, -2 d. Bi STAs – Rate Control: • MCS per link chosen to maximize long term goodput – MAC modelling • MAC is fully modelled • Deferral according to 11 ah CCA rules – OBSS packets deferral only if RSSI > ED (assume BSS ID (color) in PPDU • ED level controls deferral on a network level • – Nodes on the same 80 MHz channel have the same primary channel PHY modelling • Pathloss, shadowing, (pathloss as in SS document, shadowning w sd 5 d. B) • no fading. • Long term PER curves based on AWGN Submission Slide 4 Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 3 (Three channels:

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 3 (Three channels: Red, Blue and Green) • Channel Coloring: – – • Red Channel – • AP = [2, 5, 8, 10, 13, 16, 19, 21, 24, 27] 25 26 27 28 29 20 21 22 23 24 15 16 17 18 19 10 11 12 13 14 5 6 7 8 9 0 1 2 3 4 Blue Channel – • No two APs that have the same channel share a floor/wall For each AP, there are no more than 3 other APs that have the same channel and are within 2 (wall/floor)s penetration. AP = [0, 3, 6, 9 , 11, 14, 17, 22, 25, 28] Green Channel – Submission AP = [1, 4, 7, 12, 15, 18, 20, 23, 26, 29] Slide 5 Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 3 results UL

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 3 results UL 5 STAs per AP • 5%ile • • 3 x improvements vs -92 d. Bm 4 x improvements vs -82 d. Bm • Mean • • CCA 5%tile 50%tile 90%tile mean -52 1. 58 35. 61 78. 82 38. 72 -62 2. 75 34. 60 74. 80 38. 52 -72 3. 88 36. 44 82. 21 39. 79 -82 0. 84 30. 09 84. 02 39. 22 -92 1. 21 18. 23 80. 03 29. 57 Submission Slide 6 30% increase vs CCA=-92 to CCA= anything higher. No gain compared to -82 d. Bm Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 6 (Six channels:

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 6 (Six channels: Red, Blue, Yellow, Purple, Green and Gray) • Channel Coloring: – • Red Channel – • AP = [2, 15, 18, 21, 24] Purple Channel – • AP = [0, 3, 16, 19, 22] Yellow Channel – • AP = [1, 4, 17, 20, 23] Green Channel – • AP = [6, 9, 10, 13, 27] Blue Channel – • No two APs that have the same channel are within two floors/walls penetration AP = [5, 8, 12, 26, 29] Gray Channel – AP = [7, 11, 14, 25, 28] Submission Slide 7 Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 6 results UL

September 2014 doc. : 11 -14 -1199 -00 -00 ax Reuse 6 results UL 5 STAs per AP • 5%ile point maximized at -82 – 4 x lower at CCA= -92 • Mean: no difference CCA 5% 50% 90% mean -52 10. 54 28. 12 50. 76 30. 03 -62 10. 34 27. 50 51. 86 29. 80 -72 11. 37 29. 56 49. 19 30. 54 -82 12. 49 29. 49 49. 25 30. 73 -92 3. 54 26. 96 56. 75 29. 67 6 40 MHz channels Submission Slide 8 Qualcomm

September 2014 doc. : 11 -14 -1199 -00 -00 ax Conclusions • For residential

September 2014 doc. : 11 -14 -1199 -00 -00 ax Conclusions • For residential scenario reuse 1: – • Increasing CCA can be harmful for the 5% throughput (from 11 -14 -0846) For residential scenario reuse 3: – Gain depends on what is assumed as baseline 5%ile 3 x improvements vs -92 d. Bm; 4 x improvements vs -82 d. Bm • Mean: 30% increase vs CCA=-92 to CCA= anything higher; No gain compared to -82 d. Bm • For residential scenario reuse 6 – Negligible to small gains by increasing CCA • All CCA levels have good reuse • Effects of changing the CCA levels is highly scenario parameters dependent Submission Slide 9 Qualcomm