Preliminary Results of IEEE 802.11-19/0728r1 11ax Evaluation on Mobility in Dense Urban eMBB Scenario
Presenting the initial outcomes of simulations on mobility in a Dense Urban enhanced Mobile Broadband (eMBB) scenario using IEEE 802.11-19/0728r1 standard. Results indicate compliance with ITU requirements for IMT-2020 RAT. Simulation parameters, configurations, assumptions, and analysis of mobility interruption time and control plane latency are included.
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July 2019 doc.: IEEE 802.11-19/0728r1 11ax Evaluation Mobility Date: 2019-07-15 Authors: Name Liang Yu Affiliations Address Nufront Phone 8610- 82150688 email Liang.yu@nufront.com Tsinghua Science Park, 100084, Beijing, China Tsinghua Science Park, 100084, Beijing, China Tsinghua Science Park, 100084, Beijing, China Tsinghua Science Park, 100084, Beijing, China Jun.lei@nufront.com Jun Lei Nufront 8610- 82150688 Shenfa.liu@nufront.com Shenfa Liu Nufront 8610- 82150688 Ted.lei@nufront.com Fei Liu Nufront 8610- 82150688 Submission Slide 1 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Abstract In this contribution, we present the preliminary results of 11ax simulations on mobility in Dense Urban eMBB scenario. The simulations adhere to the methodology specified by ITU-R for self-evaluating a RAT for IMT-2020 [1]. The preliminary results show that 11ax can meet the ITU requirements on mobility in Dense Urban eMBB scenario[2]. Submission Slide 2 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Abbreviation RIT ( Radio Interface Technology) URLLC Ultra-Reliable and Low Latency Communications eMBB enhanced Mobile Broadband mMTC (massive Machine Type Communication) NSA Non-Standalone Submission Slide 3 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Outline Objective Simulation Configuration Simulation Assumption Mobility Simulation Results Mobility Interruption Time Analysis Control Plane Latency Analysis Conclusion Next Step References 1. 2. 3. 4. 5. 6. 7. 8. 9. Submission Slide 4 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Configuration 1. 2. 3. 4. 5. 6. Simulation bandwidth : 20 MHz Carrier Frequency: 4GHz BS Tx power : 49 dBm, UE Tx power: 23 dBm BS Antenna gain: 8 dBi, UE antenna gain: 0 dBi BS noise figure: 5 dB, UE noise figure : 7 dB BS antenna configuration : dual polarization 8Rx with 8 dBi gain in intended direction. UE antenna configuration : 1Tx with with 0 dBi gain. The complete configuration is specified in the ITU-R guidelines for self-evaluating a RAT ([2]). 7. 8. Submission Slide 5 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Assumptions 1. TCH Payload : 1500 Byte 2. BPSK, QPSK, 16QAM, 64QAM 3. LDPC, 1/2, 2/3, 3/4, 5/6 code rate 4. single spatial stream 5. Midamble periodicity in number of OFDM symbols is 10/20 6. Channel estimation based on L-MMSE channel estimation 7. Maximum Ratio Combining 8. LDPC decoding Submission Slide 6 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Minimum Requirements The minimum requirements of mobility in [3] are quoted as follows Submission Slide 7 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Procedure (1) The mobility simulation procedure is quoted as follows [2] Step 1: Run uplink system-level simulations, identical to those for average spectral efficiency, and 5th percentile user spectral efficiency except for speeds taken from Table 4 of Report ITU-R M.2410-0, using link-level simulations and a link-to-system interface appropriate for these speed values, for the set of selected test environment(s) associated with the candidate RITs/SRITs and collect overall statistics for uplink SINR values, and construct CDF over these values for each test environment. Step 2: Use the CDF for the test environment(s) to save the respective 50th-percentile SINR value. Submission Slide 8 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Procedure (2) Step 3: Run new uplink link-level simulations for the selected test environment(s) for either NLOS or LOS channel conditions using the associated speeds in Table 4 of Report ITU-R M.2410-0, as input parameters, to obtain link data rate and residual packet error ratio as a function of SINR. The link-level simulation shall use air interface configuration(s) supported by the proposal and take into account retransmission, channel estimation and phase noise impact. Step 4: Compare the uplink spectral efficiency values (link data rate normalized by channel bandwidth) obtained from Step 3 using the associated SINR value obtained from Step 2 for selected test environments, with the corresponding threshold values in the Table 4 of Report ITU-R M.2410-0. Step 5: The proposal fulfils the mobility requirement if the spectral efficiency value is larger than or equal to the corresponding threshold value and if also the residual decoded packet error ratio is less than 1%, for all selected test environments. For the selected test environment it is sufficient if one of the spectral efficiency values Submission (using either NLOS or LOS channel conditions) fulfils the threshold. Slide 9 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Results channel estimation MCS1: QPSK,1/2 code rate Midamble periodicity:20 channel estimation: L-MMSE VS linear interpolation Submission Slide 10 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Results 30 km/h Midamble periodicity: 10/20 Median SINR: 5.65dB@30km/h Spectral Efficiency at 2.9dB is 1.71/1.92 bit/s/Hz > 1.12 bit/s/Hz Submission Slide 11 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Simulation Results 120 km/h Midamble periodicity: 10/20 Median SINR: 4.6dB@120km/h Spectral Efficiency at 2.9dB is 1.17/1.35 bit/s/Hz > 0.8 bit/s/Hz Slide 12 Submission Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Conclusion The evaluation results show that 11ax can meet the requirements of mobility in Dense Urban eMBB scenario of IMT-2020 Submission Slide 13 Liang Yu, Nufront
July 2019 doc.: IEEE 802.11-19/0728r1 Reference [1] Report ITU-R M.2412-0 (10/2017), Guidelines for evaluation of radio interface technologies for IMT-2020 [2] Report ITU-R M.2410-0 (11/2017), Minimum requirements related to technical performance for IMT-2020 radio interface(s) [3] Report ITU-R M.2411-0 (11/2017) , Requirements, evaluation criteria and submission templates for the development of IMT-2020 Submission Slide 14 Liang Yu, Nufront
