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Authentication–MOS call

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #57079 Reply
    Rizwan
    Guest

    Hi,

    Do we require Authentication every time call is originated from Mobile and if it is not required in which cases does Authentication is to be done?

    Also if we do selective Authentication,how does it will impact call set-up time & is it a considerable one?

    #57080 Reply
    Pix
    Guest

    Authentication is quite fast, I’m not sure it is something that will greatly improve your call setup duration.

    You should be able to measure the duration thx to a drive test.

    About the other questions, I leave it to NSS gurus 🙂

    #57081 Reply
    paraHO
    Guest

    Very mature networks not run Authentication per every call but for speed rely on previous TMSI so long mobile remains in LAC same.

    #57082 Reply
    pix
    Guest

    hello paraho,

    so … for those networks, authentication is done during the location update only, but not during call setup ?

    is it really to gain few ms in the setup duration, or rather, unload the AuC / HLR ?

    #57083 Reply
    paraHO
    Guest

    hello pix

    authentication is not just at location update and during call setup call but also in cases of errors….etc

    Using TMSI help with internal processing. Some networks using TMSI for 24-hours where MS not move outside LAC area.

    It can be used where there is high load/processing issues.

    #57084 Reply
    Rizwan
    Guest

    Tnx Pix n ParaHO

    As per my knowledge, Auth is done for just for securing user info..ciphering etc

    If Auth is not done even when MS moves to other LAC. Does it impact? n if it will, how?

    #57085 Reply
    Rizwan
    Guest

    Kindly help ……

    Tnx Pix n ParaHO

    As per my knowledge, Auth is done for just for securing user info..ciphering etc

    If Auth is not done even when MS moves to other LAC. Does it impact? n if it will, how?

    #57086 Reply
    Pix
    Guest

    Hi,

    it’s up to the network to require authentication. If the MSC doesn’t ask the authentication request, then the MS won’t get authentified.

    In this case (that’s a strategy chosen by operator), the procedure will continue as if the MS was succesfully authentified.

    The ciphering is done few messages after : ciphering mode command, ciphering mode confirm, where the MS and the NSS exchange cipher key.

    Regards
    pix

    #57087 Reply
    paraHO
    Guest

    Pix you said

    – it’s up to the network to require authentication. If the MSC doesn’t ask the authentication request, then the MS won’t get authentified.

    – The ciphering is done few messages after : ciphering mode command, ciphering mode confirm, where the MS and the NSS exchange cipher key.

    That is fine provided network operator uses ciphering. What about countries where ciphering not implemented… Would auth be required each time or if not are you saying operator solely rely on IMSI request per call?

Viewing 9 posts - 1 through 9 (of 9 total)
Reply To: Authentication–MOS call
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