Power Save Calibration March 2015 Power Save Calibration Date: 2015-03-06 Authors: Name Affiliations Address Phone Email Hyeyoung Choi LG Electronics 19, Yangjea-daero 11gil, Seocho-gu, Seoul 137-130, Korea +82-2-6912-6589 hy0117.choi@lge.com Suhwook Kim suhwook.kim@lge.com Kiseon Ryu kiseon.ryu@lge.com Jeongki Kim jeongki.kim@lge.com HanGyu Cho hg.cho@lge.com Hyeyoung Choi, LG Electronics

March 2015 Abstract This submission provides results for power save calibration simulations. All test cases and parameters are defined in 11-14-0980r6 Simulation Scenarios. Hyeyoung Choi, LG Electronics

PSM Test The MSDU 1500 bytes DL traffic was transmitted every 200ms March 2015 PSM Test The MSDU 1500 bytes DL traffic was transmitted every 200ms PPDU length=2012us PSM Timer operation in current SSD When STA on PSM receives the Data and STA transmits the ACK successfully, STA starts the PSM Timer. Parameters RTS/CTS OFF AIFS= DIFS 34us MCS No A-MPDU aggregation Simulation time 300s Beacon size(Byte) 272 Hyeyoung Choi, LG Electronics

Issues of Test 5 in current SSD Month Year doc.: IEEE 802.11-yy/xxxxr0 March 2015 Issues of Test 5 in current SSD Test 5 in Current SSD is imprecise for power save calibration. In PSM Test, when STA on PSM receives a frame, STA may reset the PSM Timer. i.e., Data frame, DTIM Beacon frame In PSM/PSP Test When PS STA detects that the bit corresponding to its AID is 0 in DTIM Beacon frame whether PS STA enters the sleep state and PS STA remains the sleep state until PS STA enters the Awake state to receive the DTIM Beacon frame or not . Since the AP transmits Beacon frame in the PSM/PSP Test, the time spent in RX State of STA and TX State of AP depends on Beacon size. Hyeyoung Choi, LG Electronics John Doe, Some Company

Simulation results for PSM Test- Time(1/2) March 2015 Simulation results for PSM Test- Time(1/2) The shorter PSM Timeout is, the longer STA sleeps. If PSM Timeout is larger than DTIM Interval, the max time that STA maintains listen state is DTIM Interval. The Max value of significant PSM Timeout=DTIM interval STA(%) AP(%) Power save ON/OFF DTIM PSM Timeout Listen RX TX Sleep Active - 98.98 0.99 0.03 98.92 PSM 1 50 25.15 1.41 0.09 73.36 98.41 3 16.78 1.14 0.07 82.01 98.44 1.39 100 48.72 1.38 0.06 49.84 98.46 32.67 1.13 0.05 66.15 98.48 200 48.89 1.12 0.04 49.95 98.50 1.37 LG STA(%) AP(%) Power save ON/OFF DTIM PSM Timeout Listen RX TX Sleep Active - 98.60 1.37 0.03 0.00 PSM 1 50 20.99 1.21 0.07 77.73 98.53 1.40 3 20.98 1.12 77.83 100 33.40 1.30 65.23 33.39 65.33 200 Nokia[2] Hyeyoung Choi, LG Electronics

Simulation results for PSM Test- Time(2/2) March 2015 Simulation results for PSM Test- Time(2/2) Compared with [2] In Active Mode [3] (Nokia) suggest 80 octet for Beacon size We assume that the Size of Beacon is 272 octet(including TIM:250 octet) In PSM Mode, PSM Timeout=[200]ms We assume that PSM STA enters the sleep state during DTIM Interval when PSM STA detects that the bit corresponding to its AID is 0 in DTIM Beacon frame. Example of the frameflow in PSM scenario (DTIM=[3]/PSM Timeout=[200]ms) Slide 6 Hyeyoung Choi,, LG Electronics

Simulation results for PSM Test- Energy Month Year doc.: IEEE 802.11-yy/xxxxr0 March 2015 Simulation results for PSM Test- Energy STA(%) AP(%) Power save ON/OFF DTIM PSM Timeout Listen RX TX Sleep Active - 97.86 1.95 0.19 94.65 0.07 5.28 PSM 1 50 88.41 9.89 1.69 0.02 92.44 0.16 7.40 3 86.27 11.73 1.98 0.03 92.55 0.13 7.32 100 94.00 5.34 0.65 0.01 92.60 0.11 7.29 92.78 6.40 0.82 92.65 0.10 7.25 200 11.63 23.26 65.12 0.00 92.70 0.08 7.22 Hyeyoung Choi, LG Electronics John Doe, Some Company

Simulation results for PSM Test-EER March 2015 Simulation results for PSM Test-EER DTIM=[3], PSM Timeout=[100]ms STA AP PSM ON Energy Listen RX TX Sleep Simulation time(%) 32.67 1.13 0.05 66.15 98.48 1.38 current(mA) 50 100 280 0.003 Power(Watt) 0.001796723 0.00012386 1.58107E-05 2.18311E-07 0.005416614 5.64667E-06 0.000424013 Power (%) 92.78 6.40 0.82 0.01 92.65 0.10 7.25 Sum Power(Watt) 0.001936612 0.005846274 OFF 98.98 0.99 0.03 98.92 0.0054439 0.000108 1.05E-05 0.005440709 3.74E-06 0.000304 97.86 1.95 0.19 94.65 0.07 5.28 0.005562832 0.005748137   Energy Efficiency Ratio Hyeyoung Choi,, LG Electronics

PSP Test The MSDU 1500 bytes DL traffic was transmitted every 200ms March 2015 PSP Test The MSDU 1500 bytes DL traffic was transmitted every 200ms PPDU length=2012us Parameters RTS/CTS OFF AIFS= DIFS 34us MCS No A-MPDU aggregation Simulation time 300s Beacon size(Byte) 272 Hyeyoung Choi, LG Electronics

Simulation results for PSP Test-Time March 2015 Simulation results for PSP Test-Time STA sleeps longer than PSM Test since STA enters sleep state immediately without waiting when STA detects that the bit of MoreData is 0 in Data frame received. STA(%) AP(%) Power save ON/OFF DTIM Listen RX TX Sleep Active - 98.98 0.99 0.03 98.92 PSP 1 0.00 1.38 0.06 98.47 98.46 3 0.07 1.13 98.73 Hyeyoung Choi, LG Electronics

Simulation results for PSP Test- Energy March 2015 Simulation results for PSP Test- Energy STA(%) AP(%) Power save ON/OFF DTIM Listen RX TX Sleep Active - 97.86 1.95 0.19 94.65 0.07 5.28 PSP 1 0.03 88.98 10.80 92.60 0.11 7.29 3 2.73 84.52 12.53 0.22 Hyeyoung Choi, LG Electronics

Simulation results for PSP Test-EER March 2015 Simulation results for PSP Test-EER DTIM=[3] The PSP mechanism is more Energy efficient than the PSM. STA AP PSP ON Energy Listen RX TX Sleep Simulation time(%) 0.07 1.13 0.06 98.73 98.46 1.38 current(mA) 50 100 280 0.003 Power(Watt) 4.03427E-06 0.000125 1.85E-05 3.2582E-07 0.005415552 6.6E-06 0.000426 Power (%) 2.73 84.52 12.53 0.22 92.60 0.11 7.29 Sum Power(Watt) 0.000147507 0.005848424 OFF 98.98 0.99 0.03 98.92 0.0054439 0.000108 1.05E-05 0.005440709 3.74E-06 0.000304 97.86 1.95 0.19 94.65 5.28 0.005562832 0.005748137   Energy Efficiency Ratio cf. EER of PSM =0.3481 Hyeyoung Choi, LG Electronics

Month Year doc.: IEEE 802.11-yy/xxxxr0 March 2015 Suggested Next Step In Next Step, we clarify parameters and operation considered in simulation for aligning power saving test results. The length of frames i.e., Beacon frame, QoS Null frame, PS-Poll frame, Data, ACK The event trigger time Following event sequence is assumed: The first DL DATA arrives at 100us First DTIM Beacon is sent at 100ms The details of operation in PSP/PSM Test Hyeyoung Choi,, LG Electronics John Doe, Some Company

March 2015 Conclusion In this submission, we provide simulation results for power save calibration. Some text changes in simulation scenario are needed. Hyeyoung Choi, LG Electronics

Proposed text change in SSD[1] March 2015 Proposed text change in SSD[1] In current SSD, insert text as: In PSM Test/PSP Test When PS STA detects that the bit corresponding to its AID is 0 in DTIM Beacon frame, STA enters the sleep state and STA remains the sleep state until STA enters the Awake state to receive the next DTIM Beacon frame. MAC overhead of Beacon frame is 272 octet(including TIM:250 octet) Following event sequence is assumed: The first DL DATA arrives at 100us First DTIM Beacon is sent at 100ms Hyeyoung Choi,, LG Electronics

Reference [1] 11-14-0980-06-00ax-simulation-scenarios.docx March 2015 Reference [1] 11-14-0980-06-00ax-simulation-scenarios.docx [2] 11-15/005-00-00ax-Power Save Calibration [3]11-14-1495-00-00ax-power-save-calibration-results.pptx [4] 11-15/0072-00-00ax-U-APSD power saving calibration results Suhwook Kim, LG Electronics

March 2015 Straw poll Do you agree to include changes in document 11-15/0395r1 into the TG Simulation Scenarios document (11-14/0980r6) Y: N: A: Hyeyoung Choi,, LG Electronics