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Application SCAN when 802.11d is enabled

Feb66288
Intellectual 300 points
Other Parts Discussed in Thread: WL1271

Hi All,

When it is enabling a function of 802.11d and country IE was not yet
found, SCAN from application is not performed. I think that it should
perform passive scan in that case.

I checked a source code of WL1271 driver. In the function called
scanCncnOsSm_ActionStartGScan or scanCncnOsSm_ActionStartAScan,
scan type is SCAN_TYPE_TRIGGERED_PASSIVE if 802.11d is enabled and
country IE was not yet found.
Next, available channels are searched with active SCAN when scan type
is SCAN_TYPE_TRIGGERED_PASSIVE. So, no available channels are found.
I think that it should set SCAN_TYPE_NORMAL_PASSIVE to scan type.

Please teach me the difference between NormalSCAN and TriggerSCAN.

Best regards,

  • 0
    TI__Genius 9240 points

    Hi,

    we will investigate that and get back in the e2e

    Thanks,

    Eyal

  • 0 in reply to Eyal a
    TI__Mastermind 35795 points

    Triggered scan is associated to specific access category. It is mainly used in voice scenarios where station cannot be off channel for longer duration ( due to 20ms constraint with voice traffic). In trigger scan, one channel is scanned at one time. It is triggered when specific AC packet is transmitted successfully or otherwise.In the scenario mentioned above, SCAN_TYPE_TRIGGERED_PASSIVE and SCAN_TYPE_TRIGGERED_ACTIVE need to be changed to SCAN_TYPE_NORMAL_PASSIVE and SCAN_TYPE_NORMAL_ACTIVE respectively. Thanks,

    Saurabh

  • 0 in reply to Eyal a
    TI__Genius 9240 points

    There was in technical issue with the answer, so i copy here  Saurabh's response

    Triggered scan is associated to specific access category. It is mainly used in voice scenarios where station cannot be off channel for longer duration ( due to 20ms constraint with voice traffic). In trigger scan, one channel is scanned at one time. It is triggered when specific AC packet is transmitted successfully or otherwise.In the scenario mentioned above, SCAN_TYPE_TRIGGERED_PASSIVE and SCAN_TYPE_TRIGGERED_ACTIVE need to be changed to SCAN_TYPE_NORMAL_PASSIVE and SCAN_TYPE_NORMAL_ACTIVE respectively. Thanks,

    Saurabh

  • 0 in reply to Eyal a
    Prodigy 30 points

    Hello!

      Is there answer for this 802.11d? I have the same problem. (When 802.11d enable by ini, my device can't connect with AP at power on)

    Best Regards.

    Wenson 2011/5/25