Proposed Rate Control For MAC & Integrated Simulator May 2013 May 2014 Proposed Rate Control For MAC & Integrated Simulator Date: 2014-07-12 Authors: Osama Aboul-Magd (Huawei Technologies)

May 2014 Context The evaluation Methodology does not specify which Rate Control Algorithm to use for the MAC simulator and the Integrated Simulator This needs to be specified so that MAC and Integrated Simulation results can be compared across companies Barriac et al. (Qualcomm)

What kind of rate prediction should we use? May 2014 What kind of rate prediction should we use? Ideally: Something simple Easily reproducible across companies Gives realistic results Barriac et al. (Qualcomm)

Proposal May 2014 We propose the following method Details: Select a single MCS per link Select MCS upfront using a training phase and then fix it for the simulation time Selected MCS should maximize goodput Details: Run the simulation with all nodes using MCS0 for a set amout of time For each link, log the SINRs for each MPDU These are the SINRs of packets at the node which is the intended recipient log SINRs for both detected as well as missed MPDUs. Given this SINR information, Post process to find the MCS that would have maximized the goodput for that node. ( note good put will depend on PER curve used) Rerun the simulation with each link using the good put maximizing MCS This method was used for resuls in 11-14-0846 “CCA study in Residential Scneario” Note: A similar method was proposed by Nihar Jindal and Ron Porat in 11-14-0083 Improved Spatial Reuse Feasibility Part II While 0083 Proposed good-put maximizing MCS selection for the PHY simulator, we are proposing a similar concept for the MAC and Integrated Simulator. Barriac et al. (Qualcomm)

Benefits of suggested Proposal May 2014 Benefits of suggested Proposal More realistic than genie aided Models steady state of dynamic rate control algorithms Simple to implement Shouldn’t bias or confuse results. i.e. no strange quirks possible in dynamic rate control algorithms. No “genie” aided information Barriac et al ( Qualcomm)

May 2014 Conclusion We suggest using the MCS selection method described in slide 5 as the Rate Control Method in the MAC and Integrated Simulators. Barriac et al. (Qualcomm)

Suggested Change to 11-14-0571-02-00ax evaluation methodology May 2014 Suggested Change to 11-14-0571-02-00ax evaluation methodology Under the Section “ Integrated System Simulation Detailed Description” Add the following text at the end of the section: MCS Selection A single MCS should be selected per link. The MCS should be selected upfront using a training phase, and then fixed for the simultion time. The MCS selection should follow this process: Run the simulation with all nodes using MCS0 for a set amout of time For each link, log the SINRs for each MPDU These are the SINRs of packets at the node which is the intended recipient log SINRs for both detected as well as missed MPDUs. Given this SINR information, Post process to find the MCS that would have maximized the goodput for that link. Barriac et al. (Qualcomm)

May 2014 Straw Poll 1 Do you support using a fixed MCS per link in the Integrated /MAC simulator? Barriac et al. (Qualcomm)

May 2014 Straw Poll 2 Do you support using a fixed MCS method suggested in slide 4 for the MAC and Integrated Simulator? Barriac et al. (Qualcomm)