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Original question:

CC3135MOD: The chip would not start after programming "00" as a country code

CC3135MOD: Some Country Code Supports 5GHz STA mode but Not for AP mode

Luke Peng
Prodigy 170 points
Part Number: CC3135MOD
Other Parts Discussed in Thread: CC3135

Tool/software:

Dear Sir,

    The valid channels are listed in the table below.

https://www.ti.com/document-viewer/lit/html/SWRU455M/GUID-C873E0E5-CB0B-400F-9D02-DAF0D0DE19D1#T4344877-67

    Why some 5GHz channels are only supported for the STA mode and are not supported in the AP mode for some countries?

These country code are:
"BD", "BO", "BZ", "ID", "IR", "NG", "PK", "QA"

Thanks for your time.

Best Regards,

Luke

  • 0
    Expert 1331 points

    Channels subject to DFS restrictions can only be used when under control of a master device that has and implements radar detection capability. An AP is a master device by definition. If a device does not support radar detection, it cannot operate in AP mode in these channels.

    DFS channels are typically those in the UNII-2A and UNII-2C bands, channels 52-144. But it varies per country.

  • 0 in reply to Dean Ramsier
    Prodigy 170 points

    Dear Dean,

        For example, country code "BO" supports 5 GHz 149,153,157,161,165 in STA mode.  It also supports 5 GHz DFS 52,56,60,64 in STA mode.  However, neither 149,153,157,161,165 nor 52,56,60,64 are supported in AP mode.

        Can AP mode use 5 GHz channels 149,153,157,161,165 when the country code is set to "BO"? 

        If it cannot, why?

    Thanks for your time.

    Best Regards,

    Luke

  • 0 in reply to Luke Peng
    Expert 1331 points

    Ah, now I see your question. If it can support 149-165 in STA mode, and those channels aren't subject to DFS restrictions, why can they not be supported in AP mode?

    I don't know the answer (I'm not TI and I don't have experience with this specific device). But it looks to me like the common factor is the use of the JP region underlying those country codes. Must be something about the regulatory architecture on this particular device that causes these channels to be limited if that country utilize the JP region. Might have something to do with the fact those channels aren't supported at all in Japan.

  • 0 in reply to Dean Ramsier
    TI__Guru 64455 points

    Hi,

    At least for the high band of channels 149,153,157,161,165, these are not supported in Japan.

    The certification reports on the cc3135 don't least those channels either.

    you can download the reports from ti website.

    Regards,

    Shlomi

  • 0 in reply to Shlomi Itzhak
    Prodigy 170 points

    Dear Shlomi,

        Since the high band of channels 149,153,157,161,165 are not supported in Japan, why the region of these country code "BD", "BO", "BZ", "ID", "IR", PK", "QA", are set to "JP"?

    The following is from Wiki: en.wikipedia.org/.../List_of_WLAN_channels

    Indonesia

    Indonesia allows use of the band 5150–5350 MHz with maximum EIRP of 200 mW (23 dBm) and maximum bandwidth of 160 MHz, and the band 5725–5825 MHz with the same maximum EIRP and maximum bandwidth of 80 MHz for indoor use. Outdoors, use of the band 5725–5825 MHz with maximum EIRP of 4 W (36 dBm) is allowed, with a maximum bandwidth of 20 MHz.

    I cannot see any reason to set the region to "JP".

    Furthermore, since the region of "NG" is "ETSI", why channels 149,153,157,161,165 are listed in the STA mode but not listed in the AP mode?

    Thank you for the time.

    Best Regards,

    Luke

  • +1 in reply to Luke Peng
    TI__Guru 64455 points

    Hi,

    I am less familiar with how they divide the regions and countries within the region but JP as Japan restrict the use of these channels.

    Other countries that are under the region of Japan may use these channels as seen in the document and in WiKi.

    I don't have an explanation why it is this way.

    Shlomi