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GPRS Gs interface & paging

Viewing 15 posts - 16 through 30 (of 59 total)
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  • #54863 Reply
    Pix
    Guest

    Safar,

    Class B will be able to hear the CS-Paging over the PACCH, suspend their data connection, answer the voice call, and then automatically resume their data transfer at the end of the call.

    Second question : yes, it could help.

    regards
    pix

    #54864 Reply
    Peter
    Guest

    i have just a question for Gs implementation, what is the main indicators to decide implementing Gs or not: DATA session average duration per user, Signalling on CS Core:? thresholds?

    #54865 Reply
    pix
    Guest

    peter

    Gs interface is mostly used to allow CS Paging to get through to the subscriber when it is in gprs transfer mode.

    So the main KPI to decide Gs interface implementation is the paging success rate : if it is a bit low at some points in the day, when the eGPRS traffic is high, then the Gs interface is probably useful.

    Regards
    pix

    #54866 Reply
    Peter
    Guest

    Thanks pix, what about the threshold of paging Success rate%, when it is considered low?

    #54867 Reply
    Pix
    Guest

    I have no idea, sorry…

    Anything below 99% would be a disappointment (IMO), but I’ve no experience about that.

    #54868 Reply
    Peter
    Guest

    Anyway, actually we are over 93%, anyone has idea about thresolds?

    #54869 Reply
    Rex
    Guest

    Hi,
    In order to have Gs Interface, what’s needed for enabling(activating) it? Additional HW/SW? Can anybody explain which are procedures to create Gs Interface?
    Regards,
    Rex

    #54870 Reply
    Peter
    Guest

    normally u must purchase a licence on SGSN and MSC or MSS (it depends on vendor), Cabling, configuring the signaling between MSC and SGSN, configuration @ SGSN and MSC level and modifying NMO to 1 @ BSS side, i think thats all.

    #54871 Reply
    Pix
    Guest

    Peter,

    The thing is there is no way to know whether the 7% of failures are due to MS being blinded by GPRS activity or not.

    Can you match the hourly PSR, against the hourly activity of data transfers ? Is there a correlation ?

    Other probable causes of poor PSR are:
    – radio PCH congestion
    – poor coverage or bad interference areas
    – boards processing overload (MSC / BSC / BTS)

    What I am trying to say is that Gs interface is just a way to improve the customer “experience” (receiving calls while browsing). It s a good value added service, it will improve your image, blablabla.. On the other hand, knowing that your CS pagings will *all* go through your SGSN (and not through the A interface anymore) + there will be LA/RA combined update + IMSI/GPRS combined attach, there is a high risk that it will introduce some weird bugs.

    (this is based on what I’ve read about Gs inteface so far on this forum and what customers have shared with me)

    I don’t know with which system you are working with, but most vendors are know proposing Paging synchronisation inside the BSC itself. In few months, there will be no need for Gs interface anymore (if you keep your radio release up to date)

    Regards
    pix

    #54872 Reply
    safar
    Guest

    hi pix,

    In gs interface all paging will go thr gs interface?if gs is activated and my mobile is not attached to gprs and if call comes on my cell then paging will come thr A interface or it will come thr gs ?

    #54873 Reply
    Pix
    Guest

    Hi Safar,

    The rule is so simple… when you install Gs interface:
    ALL cs paging go from MSC to SGSN.
    ZERO cs paging go from MSC to BSC.

    Whatever the MS, whatever its state.
    , whatever whatever 🙂

    The thing is that it is only the PCU (=MFS in alcatel) that can process & redirect the cs pagings. It will send CS paging through PACCH, and other CS paging to the BSC (so they will later be send through PCH)
    Well, i’m sure yo understand my point 🙂

    Regards,
    pix

    #54874 Reply
    kamal k
    Guest

    Hi Pix,

    R u sure that after GS implementation,all paging msgs goes to BSC to SGSN & SGSN to msc?

    If ph is not having GPRS/DATA facility then?

    If i’m not in alwasy online mode then?

    Plz confirm..!

    #54875 Reply
    pix
    Guest

    CS Pagings goes from MSC to SGSN (Gs interface), then from SGSN to MFS(PCU) (Gb interface), then from here:
    – either MS is in PTM : CS Paging is sent on PACCH
    – or MS is not in PTM : CS Paging is sent to the BSC (which will send it to the PCH)

    It is done this way because the BSC doesn’t know which ms is in ptm, and which one is not.

    If the BSC knows, then this is called the “BSC Paging coordination”, and here there is no need of gs interface anymore.

    pix

    #54876 Reply
    jack
    Guest

    hi Pix.
    i doubt that BSC doesn’t know which ms is in ptm, and which one is not.
    every MS that have TFI allocated to it is in ptm mode and the rest is not.
    therefore there is no need in gs interface at all.
    please give me more detail about
    “BSC Paging coordination”
    and how i know that my BSC(NOKIA)has this feature?in documents nothing exists.

    #54877 Reply
    Dinesh Kumar Hassija
    Guest

    What are the threshold for KPI parameters for Packet data. Please give in detail as per std.recommendation.

Viewing 15 posts - 16 through 30 (of 59 total)
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