Proposal for TGad Evaluation Methodology

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Proposal for TGad Evaluation Methodology April 2007 doc.: IEEE 802.11-07/0570r0 January 2009 Proposal for TGad Evaluation Methodology Date: 2009-01-19 Authors: Eldad Perahia, Intel Corporation Eldad Perahia, Intel Corporation

January 2009 Background 11n wanted to be sure that the technical solution satisfied typical usage models and objective comparison criteria 11n usage model document defined environments, applications, uses cases, usage models, all distilled into simulation scenarios There were 9 environments, 21 applications, 39 use cases, 17 usage models, 11 simulation scenarios Simulations were important in quantifying the amount of improvement of a feature But in the end the task group focused on only three simulation scenarios And it was necessary by those performing the simulations to modify the applications to saturate the system 11n comparison criteria document included many categories requiring extensive documentation by the proposal teams Categories include marketability, backward compatibility and coexistence with legacy devices, performance measurements at the MAC SAP, MAC changes, PHY rates and preambles, channelization, spectral efficiency, PHY performance, PHY changes In the end the task group focused mainly on throughput simulations Physical layer impairments definitions were very useful in adding realism to PHY simulations Eldad Perahia, Intel Corporation

Proposal for TGad Evaluation Methodology document January 2009 Proposal for TGad Evaluation Methodology document Combines the useful elements from both 11n usage models and comparison criteria documents Defines conditions for functional requirements compliance Limited set of simulations scenarios Limited set of comparison criteria Eldad Perahia, Intel Corporation

Conditions for Functional Requirement Compliance January 2009 Conditions for Functional Requirement Compliance Point-to-point link test Source and sink UDP traffic, with infinite offered load select PHY channel model for each system performance functional requirement Define link budget for range functional requirement Tx power Antenna gain Path loss Noise figure … Eldad Perahia, Intel Corporation

PHY Simulation Conditions January 2009 PHY Simulation Conditions PHY channel impulse response model Model for each simulation scenario environments include antenna Random orientation of antenna PHY path loss model Path loss model for LOS and NLOS Differentiate between NLOS in a room/cubicle and between rooms/cubicles Hardware impairments phase noise PA non-linearity carrier frequency offset and symbol clock Eldad Perahia, Intel Corporation

System Simulation Scenarios Evaluation January 2009 System Simulation Scenarios Evaluation Intent of the simulation scenarios is to quantify the benefit of new features introduced to the standard in typical usages Minimize the simulation scenarios to those absolutely necessary to cover a diverse set of applications, environments, and channels Minimize comparison criteria to quantitative metrics (e.g. throughput) Simulation Scenario 1: Home living room Application 1: Uncompressed video between set top box and TV Simulation Scenario 2: Office conference room Application 1: Laptop transmitting lightly compressed video to projector Application 2: Laptops connected to AP for local file transfer and web browsing Application 3: Mobile device connected to laptop for sync-and-go Simulation Scenario 3: Enterprise cubicle Multiple cubicles with devices operating on same channel In each cubicle Application 1: Laptop transmitting lightly compressed video to display Application 2: Laptop connected to AP for local file transfer and web browsing Application 3: Laptop connected to hard drive Eldad Perahia, Intel Corporation