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Fast passive scan for FILS

Fast passive scan for FILS. Authors:. Date: 2012-04-21. Abstract. This proposal aims to reduce the time used for passive scan in FILS scenario. Conformance w / Tgai PAR & 5C. Problem of passive scan. T1. Monitoring window. CH1. T2. CH2. T3. CH3. The problem

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Fast passive scan for FILS

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  1. Fast passive scan for FILS Authors: Date: 2012-04-21 Dapeng Liu

  2. Abstract This proposal aims to reduce the time used for passive scan in FILS scenario. Dapeng Liu

  3. Conformance w/ Tgai PAR & 5C Dapeng Liu

  4. Problem of passive scan T1 Monitoring window CH1 T2 CH2 T3 CH3 The problem STA need to switch to different channels and stay on that channel monitoring for a period of time. In the above example, the scanning time would be: T1+T2+T3, where T1 and T2 is wasted. Dapeng Liu

  5. Possible solution Beacon 2: AP2 use channel 2 for transmission Beacon 1: AP1 use channel 1 for transmission CHx • APs send beacons use a pre-configured channel. • The beacons should contain more information than regular ones: • E.g.: The channel that it really used for data transmission. • STA monitoring that particular channel instead of scanning all the channels. • Scanning time is reduced since not necessary to change channels and wait. Solution : 802.11ai can use a pre-configured/dedicated channel for passive scan Dapeng Liu

  6. Problems need be solved • How does the STA and AP know which is the channel for beacon scanning and monitoring? • 11ai can specify a default channel for passive scan • How to avoid the confliction of the beacons sent by different APs? • Need further study Dapeng Liu

  7. Questions? Dapeng Liu

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