Submission doc.: IEEE 802.11-15/0050r0 January 2015 Yu Wang et al., EricssonSlide 1 Modeling components impacting throughput gain from CCAT adjustment.

Slides:



Advertisements
Similar presentations
Submission doc.: IEEE 11-14/0868r0 July 2014 Johan Söder, Ericsson ABSlide 1 UL & DL DSC and TPC MAC simulations Date: Authors:
Advertisements

Dynamic Sensitivity Control V2
Submission doc.: IEEE 11-14/1426r1 November 2014 Gustav Wikström et al., EricssonSlide 1 DSC and legacy coexistence Date: Authors:
Doc.: IEEE /0116r1 SubmissionYakun Sun, et. al. (Marvell)Slide 1 Long-Term SINR Calibration for System Simulation Date: Authors: NameAffiliationsAddressPhone .
Submission doc.: IEEE /1225r1 Considerations on CCA for OBSS Opearation in ax Date: Slide 1Huawei Authors:
Discussion on The Receiver Behavior for DSC/CCAC with BSS Color
Submission doc.: IEEE 11-15/613r0 May 2015 Chinghwa Yu et al, MediaTek Inc.Slide 1 Box 5 Calibration Result Date: Authors:
Doc.: IEEE /0551r1 SubmissionSuhwook Kim, LG ElectronicsSlide 1 OBSS Preamble Detection Evaluation Date: Authors: NameAffiliationsAddressPhone .
Doc.: IEEE Amin Jafarian, Newracom 1 CCA Regime Evaluation Revisited March 2015 NameAffiliationsAddressPhone Amin
Submission doc.: IEEE /0383r0 Impact of number of sub-channels in OFDMA Date: Slide 1Leif Wilhelmsson, Ericsson March 2015 Authors:
Submission doc.: IEEE 11-14/1148r1 Consideration of asynchronous interference in OBSS environment Date: Authors: September 2014 Slide 1Koichi.
Doc.: IEEE /0861r0 SubmissionSayantan Choudhury Impact of CCA adaptation on spatial reuse in dense residential scenario Date: Authors:
Doc.: IEEE /1207r1 Submission Imad Jamil (Orange)Slide 1 OBSS reuse mechanism which preserves fairness Date: Authors: September 2014.
Submission doc.: IEEE /0085r1 Jan 2015 John Son, WILUS InstituteSlide 1 Legacy Fairness Issues of Enhanced CCA Date: Authors:
Doc.: IEEE /1443r0 SubmissionEsa Tuomaala Adapting CCA and Receiver Sensitivity Date: Authors: Slide 1 November 2014.
Doc.: IEEE /1420r1Nov 2014 Submission Po-Kai Huang (Intel) Slide 1 The Impact of Preamble Error on MAC System Performance Date: NameAffiliationsAddressPhone .
Doc.: IEEE /1187r1Sep 2014 Submission Po-Kai Huang (Intel) Slide 1 The Effect of Preamble Error Model on MAC Simulator Date: NameAffiliationsAddressPhone .
Doc.: IEEE /1227r3 SubmissionSlide 1 OFDMA Performance Analysis Date: Authors: Tianyu Wu etc. MediaTek Sept 2014 NameAffiliationsAddressPhone .
Submission doc.: IEEE /1452r0 November 2014 Leif Wilhelmsson, EricssonSlide 1 Frequency selective scheduling in OFDMA Date: Authors:
Submission doc.: IEEE /0336r1 March 2015 Xiaofei Wang (InterDigital)Slide 1 MAC Overhead Analysis of MU Transmissions Date: Authors:
Impact of LTE in Unlicensed Spectrum on Wi-Fi
Doc.: IEEE /0116r0 SubmissionYakun Sun, et. Al.Slide 1 Long-Term SINR Calibration for System Simulation Date: Authors: NameAffiliationsAddressPhone .
Submission doc.: IEEE /0374r1 Mar 2015 John Son, WILUS InstituteSlide 1 Further Considerations on Legacy Fairness with Enhanced CCA Date:
Submission doc.: IEEE /0868r0 July 2015 Hakan Persson, Ericsson ABSlide 1 Impact of Frequency Selective Scheduling Feedback for OFDMA Date:
Doc.: IEEE /1081r0 SubmissionSayantan Choudhury HEW Simulation Methodology Date: Sep 16, 2013 Authors: Slide 1.
Doc.: ax Submission Sept 2014 Slide 1 Effect of CCA in residential scenario part 2 Date: Authors:
Doc.: IEEE /0648r0 Submission May 2014 Chinghwa Yu et. al., MediaTekSlide 1 Performance Observation of a Dense Campus Network Date:
Submission doc.: IEEE /0578r0 May 2014 Frank LaSita, InterDigitalSlide 1 Residential Scenario CCA/TPC Simulation Discussion Date: Authors:
Submission doc.: IEEE /1108r0 Technical Feasibility for LRLP September 2015 Chittabrata Ghosh, IntelSlide 1 Date: Authors:
Doc.: IEEE /0804r0 Submission July 2015 TG ax Outdoor Enterprise Scenario and DSC Date: Authors: Graham Smith, SR TechnologiesSlide 1.
Submission doc.: IEEE /0869r0 July 2015 Hakan Persson, Ericsson ABSlide 1 OFDMA and VoIP Capacity Date: Authors:
Doc.: ax Submission July 2014 Slide 1 Proposed Calibration For MAC simulator Date: Authors:
Doc.: IEEE /1207r0 Submission Imad Jamil (Orange)Slide 1 OBSS reuse mechanism which preserves fairness Date: Authors: September 2014.
Doc.: IEEE /0889r0 Submission June 2014 Nihar Jindal, Broadcom Performance Gains from CCA Optimization Date: Authors: Slide 1.
Doc.: IEEE /0637r0 Submission May 2014 James Wang et. al., MediaTekSlide 1 Spatial Reuse and Coexistence with Legacy Devices Date:
Doc.: IEEE /1441r0 Submission Simulation Setting of Box5 Calibration Date: Authors: Slide 1Jiyong Pang (Huawei Technologies) Nov 2014.
Doc.: IEEE /0523r0 Submission April 2014 Imad Jamil (Orange)Slide 1 MAC simulation results for Dynamic sensitivity control (DSC - CCA adaptation)
Submission doc.: IEEE 11-15/1138r1 Month Year Filip Mestanov (Ericsson)Slide 1 To DSC or not to DSC Date: Authors:
Doc.: IEEE /0680r1 SubmissionJiyong Pang, Huawei TechnologiesSlide 1 Reference Box5 Calibration Assumptions and Parameters Date: Authors:
Doc.: IEEE / ax Submission Eduard Garcia-Villegas Drivers of the dynamic CCA adaptation Authors: Nov Date:
Doc.: IEEE /0814r0 Submission July 2015 Simulation Results for Box5 Calibration Ke Yao, et, al. (ZTE) Slide 1 Date: Authors: NameAffiliationAddress .
Doc.: IEEE /0307r0 Submission January 2014 Nihar Jindal, Broadcom PHY Calibration Results Date: Authors: Slide 1.
Investigation on 1024 QAM feasibility in 11ax
Submission doc.: IEEE /1373r1 November 2015 Narendar Madhavan, ToshibaSlide 1 Updated Box 5 Calibration Results Date: Authors:
Doc.: IEEE /0212r3 Submission Feb 2016 TG ax Enterprise Scenario, Color and DSC Date: Authors: Graham Smith, SR TechnologiesSlide 1.
Doc.: IEEE /0635r1 Submission May 2014 Dynamic Sensitivity Control Implementation Date: 2014-May Authors: Graham Smith, DSP GroupSlide 1.
Submission doc.: IEEE /0871r1 Jul Jiyong Pang, et. al. Huawei Further Calibration Results towards Integrated System Level Simulation Date:
Verifying 11ax’s PAR by UL MU-MIMO
TG ax Indoor Enterprise Scenarios, Color, DSC and TPC
Preliminary 11ax PAR Verification
Performance Evaluation of OBSS Densification
Preliminary 11ax PAR Verification
SLS Box5 Calibration Results and Discussions
OFDMA Performance Analysis
OFDMA Performance Analysis
The Effect of Preamble Error Model on MAC Simulator
Preliminary 11ax PAR Verification
OBSS Preamble Detection
Simulation Results for Box5
Considerations on CCA for OBSS Opearation in ax
AP Coordination in EHT Date: Authors: Name Affiliations
May 2016 doc.: IEEE /584r1 May 2016 Need of SDU Fragmentation to Reduce Padding Ratio in UL-OFDMA Transmission Date: Authors: Yu Wang.
Box 5 Calibration Result
OFDMA Performance Analysis
Month Year doc.: IEEE /0578r0 May 2016
Potential of Modified Signal Detection Thresholds
Coex Simulation and Analysis
AP Coordination in EHT Date: Authors: Name Affiliations
DSC Calibration Result
Consideration on System Level Simulation
Presentation transcript:

Submission doc.: IEEE /0050r0 January 2015 Yu Wang et al., EricssonSlide 1 Modeling components impacting throughput gain from CCAT adjustment Date: Authors:

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 2 Background Some contributions show moderate gains from Clear Channel Assessment Threshold (CCAT) adjustment “DSC performance” [1] shows < 50% in both average and 5 th percentile Other contributions show much higher gains “Performance Gains from CCA Optimization” [2] indicates ~200% gain in average throughput Question to answer: What are the important modelling components needed to get a more realistic estimation of the gain by adjusting CCAT?

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 3 Background Simplified traffic modeling used Full buffer DL only Compare the effect of the following modeling components ComponentSimplifiedRealistic Spatial streams1 (SISO)1 to 2 (MIMO) Link adaptation“Ideal”ACK-based Preamble receptionAlways received and decoded In some cases not received or decoded

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 4 Simulation scenario 2 “Enterprise Scenario” as defined in [3] 8 offices, 64 cubicles per office, 2 STAs per cubicle (8 × 64 × 2) / 32 = 32 STA/AP 4 × 80MHz channels (8 APs on the same channel) 32 × 8 = 256 STAs on the same channel P2P links are not included in the simulation DL full buffer traffic

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 5 Simplified modelling components SISO ‘Ideal’ link adaptation before transmission used to set MCS Preamble Reception Ideal PLCP preamble decoding When two preambles arrive at the same time, both can be decoded OFDM signal always identified Even if PLCP has already been transmitted when the sensing starts In the simplified modeling CCA-SD (preamble detection) threshold is always used, although CCA-ED threshold should be used in case the preamble is not decoded AP A AP B PayloadPreamble SensingPayloadPreamble AP A AP B Preamble Payload

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 6 More realistic modelling components MIMO Link adaptation Adaptive auto-rate fallback Preamble Reception: PLCP preamble decoding When two preambles arrive at the same time, both can be decoded only if SINR is sufficiently high signal may not be identified If a preamble can not be detected, CCA-ED will be used AP A AP B PayloadPreamble SensingPayloadPreamble AP A AP B Preamble Payload

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 7 Average throughput gain Figure shows gain in average throughput for different CCAT compared to -82 dBm Large gains with simplified modeling Very small gains with more realistic modeling

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 8 Modeling impact on throughput -82 vs. -50 dBm CCAT: gain in average user throughput varies from 6% to 137% Model analysis for gain from reduced CCAT: MIMO: high SINR with -82 dBm can not be fully utilized by SISO transmission,  higher user -82 dBm LA: lower user -50 dBm due to larger variations in interference PR: higher user -82 dBm since the ED threshold (-62 dBm) is applied when an interferer’s preamble is not correctly decoded Moving from simplified to more realistic modeling: Higher -82 dBm and lower -50 dBm The gain between -82 dBm and -50 dBm is reduced, compared to the simplified modeling gain -82 dBm-50 dBm Average user throughput (Mb/s) LA: link adaptation PR: preamble reception (detection & decoding) MIMO PR LA Ideal,SISO Ideal,MIMO Non-ideal LA,MIMO Non-ideal PR,MIMO Non-ideal LA+PR,MIMO

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 9 Simplified models Ideal LA & PR, SISO Gain in average user throughput: 137% Gain in spatial reuse measured by AP transmitting time: 242% Loss in transmission rate: 21% Loss due to increased packet loss: 5% -82 dBm-70 dBm-50 dBm AP state ratio Defer Receive Transmit -82 dBm-70 dBm-50 dBm Average MCS rate (bits/symbol) Relative value:

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 10 More realistic models Non-ideal LA & PR, MIMO Gain in average user throughput: 6% Gain in spatial reuse measured by AP transmitting time: 178% Loss in transmission rate: 40% Loss due to increased packet loss : 40% -82 dBm-70 dBm-50 dBm AP state ratio Defer Receive Transmit -82 dBm-70 dBm-50 dBm Average MCS rate (bits/symbol) Relative value:

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 11 Summary Factors limiting user throughput gain with CCAT adjustment are identified With SISO and ideal modeling assumptions, high gain has been shown The gain in average user throughput of adjusted CCAT is reduced significantly after adding: MIMO transmission (improves baseline) Adaptive auto rate fallback link adaptation Realistic preamble detection and decoding Analysis was done for full buffer DL-only traffic, for realistic gain estimation realistic traffic model with mix of DL and UL traffic should be considered Adjusted CCAT or DSC provides system improvements [1] but more realistic modeling is important to avoid overestimation of gains

Submission doc.: IEEE /0050r0January 2015 Yu Wang et. al., EricssonSlide 12 References [1] 11-14/1427r2, “DSC Performance” [2] 11-14/0889r3, “Performance Gains from CCA Optimization” [3] 11-14/0980r5, “TGax Simulation Scenarios”