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Call get missed

Viewing 8 posts - 1 through 8 (of 8 total)
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  • 20th January 2010 at 20:25 #60806
    HuNi
    Guest

    Hi All

    we are facing an issue ,when we called a user,and if the user is in a active data session,voice call get missed.
    It says user phone is switch off.
    this happens in 2G only,when the Phone is 3G it is okay.

    Any one has any idea on this issue.

    Thanks
    HuNi

    20th January 2010 at 22:08 #60807
    Pix
    Guest

    Hello,

    You cannot page a MS in a data session, unless :
    1. the phone is able to listen to the PCH while in transfer mode
    or
    2. the Gs interface (MSC – SGSN) is implemented
    or
    3. your BSS is able to coordinate the CS Paging towards MS in transfer mode.

    For 3G, there is no such problem because data and voice are handled by the same network. In 2G, the voice is handled by MSC, the data by SGSN.

    -pix

    24th January 2010 at 05:18 #60808
    HuNi
    Guest

    Thank you PIX for your prompt reply.

    can you please tell me what is the primary function of the Gs Interface.

    Thanks
    HuNi

    25th January 2010 at 10:28 #60809
    kamal
    Guest

    GS is interface bet’n MSC & SGSN..
    In this case,LU will be done by SGSN for MS having active PDP content or in GMM idle mode(always online mode)..
    For rest of the cases,MSC will do..

    25th January 2010 at 11:56 #60810
    HuNi
    Guest

    Hi Kamal

    At the moment our network does not have this link.
    if we put in this link will this help on CS paging while in a PS session.

    Thanks
    HuNi

    26th January 2010 at 05:48 #60811
    Pix
    Guest

    Huni,

    The Gs is used to forward the CS Paging to a MS in GMM Ready State.

    It is “NMO I”, but I don’t know if you are familiar with this term.

    So yes, that will do exactly what you want to do. However many vendors are now implementing the CS Paging coordination inside the BSC itself, without the need of the Gs interface.

    Cheers,
    Pix

    27th January 2010 at 06:53 #60812
    MF
    Guest

    DEAR HUNI,
    PLS CHECK FOR PS PAGING, i.e CHECK MPDCH(MASTER PACKCET DATA CHANNEL FOR ALL CELLS , IF IT IS OFF, PLS ACTIVATE IT FOR A SINGLE CELL OR A SITE, IT CAN HELP FOR PAGING IN PS MODE.

    27th January 2010 at 08:42 #60813
    Pix
    Guest

    Master Channel is not understood by MS, do not activate it.

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