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Fast Active Scan Proposals. Moo Ryong Jeong, Fujio Watanabe, Toshiro Kawahara DoCoMo USA Labs [email protected] Zhun Zhong Philips [email protected] What the proposal is about?. NOT about whether to use active scanning NOT about when to use active scanning

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Fast active scan proposals

Fast Active Scan Proposals

Moo Ryong Jeong, Fujio Watanabe, Toshiro Kawahara

DoCoMo USA Labs

[email protected]

Zhun Zhong

Philips

[email protected]

Moo Ryong Jeong, DoCoMo USA Labs.


What the proposal is about
What the proposal is about?

  • NOT about whether to use active scanning

  • NOT about when to use active scanning

  • It is about, if active scanning is used, how the process can be improved.

Moo Ryong Jeong, DoCoMo USA Labs.


Proposed changes
Proposed changes

  • Allow STA to send directed probe request

  • AP shall reply with ACK and send the probe response later, or if capable, may reply with probe response within SIFS (similar to PS-Poll)

  • If AP opts to response the probe response later, it may send the probe response after the medium is idle for PIFS.

Moo Ryong Jeong, DoCoMo USA Labs.


Benefit
Benefit

  • When the AP of interest is reachable, get the probe response faster.

  • When AP of interest is not reachable, learn this fact faster.

  • Eliminate unnecessary probe responses from APs not of interest.

Moo Ryong Jeong, DoCoMo USA Labs.


Motion
Motion

  • To instruct the editor to incorporate the text from document 03/0623r3 into the next TGk draft.

Moo Ryong Jeong, DoCoMo USA Labs.


Backup slides

Backup slides

Moo Ryong Jeong, DoCoMo USA Labs.


Current standard does not allow directed probe request
Current standard does not allow directed Probe Request

  • Definitions

    • 3.16 directed address: See:unicast frame.

    • 3.48 unicast frame: A frame that is addressed to a single recipient, not a broadcast or multicast frame. Syn:directed address.

  • Active scanning

    • 11.1.3.2.2 Active scanning procedure

      c) Send a probe with the broadcast destination, SSID, and broadcast BSSID;

    • Annex C.3 State machines for MAC stations

      • See page 380 of 802.11/1999 on Service Synchronization_Sta

Moo Ryong Jeong, DoCoMo USA Labs.


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