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Doc.: IEEE 802.11-15/0801r0 Submission July 2015 Masahito Mori, Sony CorporationSlide 1 DCCA/DSC Reference Simulation Results Date: 2015/07/12 Authors:

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Presentation on theme: "Doc.: IEEE 802.11-15/0801r0 Submission July 2015 Masahito Mori, Sony CorporationSlide 1 DCCA/DSC Reference Simulation Results Date: 2015/07/12 Authors:"— Presentation transcript:

1 doc.: IEEE 802.11-15/0801r0 Submission July 2015 Masahito Mori, Sony CorporationSlide 1 DCCA/DSC Reference Simulation Results Date: 2015/07/12 Authors:

2 doc.: IEEE 802.11-15/0801r0 Submission July 2015 Masahito Mori, Sony CorporationSlide 2 Authors (cont’d):

3 doc.: IEEE 802.11-15/0801r0 Submission Abstract DCCA/DSC reference simulation results (based on 15/0652r1) collected from multiple contributors all show that the system throughput is significantly improved by changing the CCA-SD threshold. As next steps, we will continue the efforts to further align the reference simulation results, and also run the simulation in more practical scenarios defined in TGax Simulation Scenarios document, 14/0980r12 July 2015 Masahito Mori, Sony CorporationSlide 3

4 doc.: IEEE 802.11-15/0801r0 Submission DCCA/DSC Reference Scenario from 15/0652r1 July 2015 Masahito Mori, Sony CorporationSlide 4 30m 3m AP1AP2 STA2 STA4 STA1 STA3 CCA-SD threshold is altered between -76, -66, and -56 dBm and throughput is measured at each APs/STAs

5 doc.: IEEE 802.11-15/0801r0 Submission DCCA/DSC Reference Simulation Results July 2015 Masahito Mori, Sony CorporationSlide 5 CCA-SD Sony*WILUS*NTT*SRTech*BCM*LGE*MTK*Nokia* -76 BSS1 STA151.0654.0948.7043.3067.5967.8149.1853.76 STA251.7453.0048.8047.0066.4268.9949.5353.29 Total102.80107.0997.5090.30134.01136.8098.71107.05 BSS2 STA350.5354.5147.8043.3066.5368.4652.0154.63 STA451.4054.3648.2043.1068.1968.2253.8254.12 Total101.93108.8796.0086.40134.72136.68105.83108.75 BSS1 + BSS2204.73215.96193.50176.70268.73273.48204.54215.79 -66 BSS1 STA193.2495.2293.00 85.2293.99100.1394.67 STA294.2896.3193.5094.0084.3392.27100.5195.22 Total187.52191.53186.50187.00169.55186.26200.64189.89 BSS2 STA393.0395.1293.6094.4084.7792.83100.7595.19 STA493.9395.9393.1092.7085.0091.98100.2095.00 Total186.96191.05186.70187.10169.77184.81200.95190.19 BSS1 + BSS2374.48382.58373.20374.10339.32371.07401.59380.08 Gain1.831.771.932.121.261.361.961.76 -56 BSS1 STA195.2695.7093.00 87.8094.58100.7994.82 STA296.1395.4393.4094.0086.3392.20100.7695.39 Total193.22191.13186.40187.00174.13186.78201.55190.21 BSS2 STA395.6295.5193.6094.4087.0193.10101.1295.17 STA495.5496.7193.1092.7087.3792.33100.6894.97 Total191.16192.22186.70187.10174.38185.43201.80190.14 BSS1 + BSS2384.38383.35373.10374.10348.51372.21403.35380.35 Gain1.881.781.932.121.301.361.971.76 26-112% gain by changing the CCA-SD! * The simulation results are from individual contributors, company names are used only for convenience

6 doc.: IEEE 802.11-15/0801r0 Submission DSC Calibration Next Steps Efforts for alignment of baseline simulation –To add metrics (PER, …) –To check the backoff timer countdown procedure, the behavior when a collision happens, the behavior for CCA-SD, … Simulation with practical scenario –To run the simulation with TGax Simulation Scenario 1 (residential scenario) and 2 (enterprise scenario) at least –Many companies ran the simulation with the both scenarios but different assumptions. Better to run with common assumptions Combinations of HEW and Non HEW devices Various traffic models (UL only, DL only, UL+DL) July 2015 Masahito Mori, Sony CorporationSlide 6

7 doc.: IEEE 802.11-15/0801r0 Submission Conclusion This joint submission provided simulation results for DCCA/DSC calibration (15/0652r1) of each members –The results show that the system throughput is significantly improved by changing the CCA-SD threshold Next steps of the DCCA/DSC calibration were presented –Efforts for alignment of baseline simulation –Simulation with practical scenarios July 2015 Masahito Mori, Sony CorporationSlide 7

8 doc.: IEEE 802.11-15/0801r0 Submission References 14/0571r9 “11ax Evaluation Methodology” 14/0980r12 “TGax Simulation Scenarios” 15/0652r1 “Reference Simulation Model for Dynamic CCA / DSC Calibration” July 2015 Masahito Mori, Sony CorporationSlide 8

9 doc.: IEEE 802.11-15/0801r0 Submission Appendix July 2015 Masahito Mori, Sony CorporationSlide 9

10 doc.: IEEE 802.11-15/0801r0 Submission Checkpoint 1 PPDU Duration PPDU Duration = 1,732 [us] Detail –MPDU Length = 1,472 (App) + 28 (UDP/IP) + 8 (LLC) + 30 (MAC+FCS) + 4 (Delimiter) + 2 (Pad) = 1,544 [bytes] –PSDU Length = MPDU Length * 32 = 49,408 [bytes] = 395,264 [bits] –Data Length = Service + PSDU Length + Tail = 16 + 395,264 + 6 = 395,286 [bits] –Data Symbols (MCS5) = CEILING (395,286 / 936) = 423 [symbols] –Data Duration = 423 * 4 = 1,692 [us] –VHT Preamble Duration (L-STF+L-LTF+L-SIG+VHT-SIG-A+VHT-STF+VHT- LTF+VHT-SIG-B) = 40 [us] –PPDU Duration = 1,692 + 40 = 1,732 [us] July 2015 Masahito Mori, Sony CorporationSlide 10

11 doc.: IEEE 802.11-15/0801r0 Submission Checkpoint 2 RSSI Rx AP1AP2STA1STA2STA3STA4 Tx AP1--63.42-39.23 -65.49 AP2-63.42--65.49 -39.23 STA1-44.23-70.49--51.29-72.42-72.72 STA2-44.23-70.49-51.29--72.72-72.42 STA3-70.49-44.23-72.42-72.72--51.29 STA4-70.49-44.23-72.72-72.42-51.29- July 2015 Masahito Mori, Sony CorporationSlide 11

12 doc.: IEEE 802.11-15/0801r0 Submission Checkpoint 3 Theoretical System Throughput Theoretical MSDU throughput calculation for MCS 5 (234Mbps), Aggregation size = 32: Packet time = VHT preamble time + CEILING ((PPDU size x Aggregation size X 8 + service/tail bits)) / date rate, 4) = 1732 us Average packet time = Average medium waiting time + Packet time + SIFS + ACK time = SIFS + AIFSN x slot time + CW/2 x slot time + Packet time + SIFS + ACK time = 1926.5 us Theoretical MSDU throughput = (MSDU size – MAC header) x 8 x Aggregation size / Average packet time ~= 202 Mbps July 2015 Masahito Mori, Sony CorporationSlide 12

13 doc.: IEEE 802.11-15/0801r0 Submission Reference Traffic Model / MCS Selection July 2015 Masahito Mori, Sony CorporationSlide 13 Changes from 15/0652r1 A description of “start time” added in Traffic type (copied from Box5 scenario, 1 July 2015) The description of MPDU size changed (copied from Box5 scenario, 9 July 2015)

14 doc.: IEEE 802.11-15/0801r0 Submission Reference Operational Parameters July 2015 Masahito Mori, Sony CorporationSlide 14 Changes from 15/0652r1 The description of Guard Interval changed (copied from Box5 scenario, 9 July 2015)

15 doc.: IEEE 802.11-15/0801r0 Submission Reference Operational Parameters (cont’d) July 2015 Masahito Mori, Sony CorporationSlide 15 Output Changes from 15/0652r1 “Running time” added (copied from Box5 scenario, 1 July 2015) “# Test Run” added (1 July 2015) “PER” and “#transmitted frames” added as an output metric (1 July 2015)

16 doc.: IEEE 802.11-15/0801r0 Submission CCA level and Receiver State Machine for calibration Apply CCA-SD threshold of -76, -66, and -56 dBm to draw throughput graphs “Packet reception and preamble detection procedure” shall –Follow Appendix 4 of Evaluation Methodology document [3] –Set “PPDU capture window” to 0 ns –Set “preemption window” to 0 ns July 2015 Masahito Mori, Sony CorporationSlide 16

17 doc.: IEEE 802.11-15/0801r0 Submission CCA level and Receiver State Machine for calibration (Cont.) Confirmation about Rx Sensitivity –Sony assumes “Rx Sensitivity = CCA-SD” in this calibration In this calibration scenario, it means that Rx Sensitivity also varies to - 76dBm/-66dBm/-56dBm The signal that has rx power below CCA-SD simply drops and doesn’t affect receiver state. Confirmation about the condition of Rx termination –Sony assumes that the condition for early Rx termination is only for occurring preamble error. –Except above condition, once signal detected, reception continues to the end of PPDU. July 2015 Masahito Mori, Sony CorporationSlide 17 Let us confirm the implementation of each simulator. PLCP PSDU Arrived PPDU Detect/Not detect depend on Rx sensitivity=CCA-SD Rx is terminated only if preamble error occurs. Otherwise, Rx continues to end of PPDU

18 doc.: IEEE 802.11-15/0801r0 Submission TGax SS1 Related Contributions DCNTitleAuthor (Affiliation) 14/0578r0Residential Scenario CCA/TPC Simulation DiscussionJoseph Levy (InterDigital) 14/0832r0Performance Evaluation of OBSS DensificationPo-Kai Huang (Intel) 14/0833r0 Residential Scenario Sensitivity and Transmit Power Control Simulation Results Ron Murias (InterDigital) 14/0846r1CCA Study in Residential ScenarioGwen Barriac (Qualcomm) 14/0861r0Impact of CCA adaptation on spatial reuse in dense residential scenarioSayantan Choudhury (Nokia) 14/0889r3Performance Gains from CCA OptimiationNihar Jindal (Broadcom) 14/1199r1CCA Study in Residential Scenario - Part 2Gwen Barriac (Qualcomm) 14/1225r1Considerations on CCA for OBSS Opearation in 802.11axJun Luo (Huawei) 14/1427r2DSC PerformanceGustav Wikstrom et al. (Ericsson) 14/1443r0Adapting CCA and Receiver SensitivityEsa Tuomaala (Nokia) 15/0027r1Simulation Based Evaluation DSC in residential scenarioM. Shahwaiz Afaqui (UPC) 15/0085r1Legacy Fairness Issues of Enhanced CCAJohn Son (WILUS Institute) 15/0357r4Scenario 1 CCA Simulation Knut Odman (Broadcom Corporation) 15/0371r2Proposal and simulatin based evaluation of DSC-AP AlgorithmEduard Garcia-Villegas (UPC) 15/0374r1Further Considerations on Legacy Fairness with Enhanced CCAJohn Son (WILUS Institute) 15/0543r3Simulation Scanario changes for Frequency Re-useGraham Smith (SR Technologies) 15/0544r0Proposed text addityions to 14/980 for frequency re-useGraham Smith (SR Technologies) July 2015 Masahito Mori, Sony CorporationSlide 18

19 doc.: IEEE 802.11-15/0801r0 Submission TGax SS2 Related Contributions DCNTitleAuthor (Affiliation) 14/0832r0Performance Evaluation of OBSS DensificationPo-Kai Huang (Intel) 14/0868r1UL & DL DSC and TPC MAC simulationsJohan Soder (Ericsson) 14/0889r3Performance Gains from CCA OptimiationNihar Jindal (Broadcom) 14/1426r2DSC and legacy coexistenceGustav Wikstrom et al. (Ericsson) 14/1427r2DSC PerformanceGustav Wikstrom et al. (Ericsson) 15/0050r0 Modeling components impacting throughput gain from CCAT adjustment Yu Wang (Ericsson AB) 15/0300r0Potential of Modified Signal Detection ThresholdsGustav Wikstrom (Ericsson AB) 15/0543r3Simulation Scanario changes for Frequency Re-useGraham Smith (SR Technologies) 15/0544r0Proposed text addityions to 14/980 for frequency re-useGraham Smith (SR Technologies) 15/0548r0Enterprise Scenario and DSCGraham Smith (SR Technologies) July 2015 Masahito Mori, Sony CorporationSlide 19

20 doc.: IEEE 802.11-15/0801r0 Submission TGax SS3 Related Contributions DCNTitleAuthor (Affiliation) 14/0523r0MAC simulation results for DSC and TPCLaurent Cariou (Orange) 14/0779r2DSC Practical UsageGraham Smith (DSP Group) 14/0832r0Performance Evaluation of OBSS DensificationPo-Kai Huang (Intel) 14/0889r3Performance Gains from CCA OptimiationNihar Jindal (Broadcom) 14/1171r1DSC Simulation Results for Scenario 3Masahito Mori (Sony) 14/1207r1OBSS Reuse mechanism which preserves fairnesslaurent cariou (Orange) 14/1403r0Performance Analysis of BSS Color and DSCMasahito Mori (Sony) 14/1427r2DSC PerformanceGustav Wikstrom et al. (Ericsson) 14/1448r2Considerations for Adaptive CCAReza Hedayat (Newracom) 15/0045r0Performance Analysis of BSS Color and DSCMasahito Mori (Sony) 15/0319r1Impact of TPC coupled to DSC for legacy unfairness issueMasahito Mori (Sony) 15/0543r3Simulation Scanario changes for Frequency Re-useGraham Smith (SR Technologies) 15/0544r0Proposed text addityions to 14/980 for frequency re-useGraham Smith (SR Technologies) July 2015 Masahito Mori, Sony CorporationSlide 20

21 doc.: IEEE 802.11-15/0801r0 Submission TGax SS4 Related Contributions DCNTitleAuthor (Affiliation) 14/1427r2DSC PerformanceGustav Wikstrom et al. (Ericsson) 14/1448r2Considerations for Adaptive CCAReza Hedayat (Newracom) 15/0543r3Simulation Scanario changes for Frequency Re-useGraham Smith (SR Technologies) 15/0544r0Proposed text addityions to 14/980 for frequency re-useGraham Smith (SR Technologies) July 2015 Masahito Mori, Sony CorporationSlide 21

22 doc.: IEEE 802.11-15/0801r0 Submission Other DCCA/DSC Contributions DCNTitleAuthor (Affiliation) 14/0628r0Measurements on CCA Thresholds in OBSS Environments John Son (WILUS Institute), Young Doo Kim (SK Telecom) 14/0635r1DSC ImplementationGraham Smith (DSP Group) 14/0637r0Spatial Reuse and Coexistence with Legacy DevicesJames Wang (mediaTek) 14/0847r1Further Considerations on Enhanced CCA for 11axJohn Son (WILUS Institute) 14/0854r0DSC and Legacy CoexistenceWilliam Carney (SONY) 14/0856r1Evaluating Dynamic CCA/Receiver Sensitivity AlgorithmsBrian Hart (Cisco Systems) 14/872r0A Protocol Framework for Dynamic CCASean Coffey (Realtek) 14/0880r1 Increased Network Throughput with TX Channel Width Related CCA and Rules James Wang (Mediatek) 14/1106r1WLAN Frame Collision Information Peng Shao (NEC Communication Systems) 14/1224r0Link Aware CCABrian Hart (Cisco Systems) 14/1233r2Adaptive CCA for 11axReza Hedayat (Newracom) July 2015 Masahito Mori, Sony CorporationSlide 22

23 doc.: IEEE 802.11-15/0801r0 Submission Other DCCA/DSC Contributions (Cont’d) DCNTitleAuthor (Affiliation) 14/1416r1Observed Protocol Violations Caused by DSC for Roaming STAs Chuck Lukaszewski (Aruba Networks) 14/1435r0Considerations on OBSS Spatial ReuseJianhan Liu (Mediatek Inc.) 14/1580r0Perspectives on Spatial Reuse in 11axReza Hedayat (Newracom) 15/0025r0DSC and RoamingGraham Smith (SR Technologies) 15/0105r0Dynamic CCA ManagementSean Coffey (Realtek) 15/0318r1CCA Regime Evaluation RevisitedAmin Jafarian (Newracom Inc.) 15/0338r1ssions on the Definition of CCA ThresholdAkira Kishida (NTT) 15/0588r0CCA revisit IIAmin Jafarian (Newracom) 15/0595r2Discussion on the Receiver Behavior for CCAC DSC with BSS ColorYasuhiko Inoue (NTT) 15/0652r1Reference Simulation Model for Dynamic CCA / DSC CalibrationMasahito Mori (Sony) July 2015 Masahito Mori, Sony CorporationSlide 23

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