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Improve Call Setup Succes Rate

Viewing 15 posts - 1 through 15 (of 33 total)
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  • #46263 Reply
    Mahesh Galhena
    Guest

    Hi all,

    I have a problem of improving “Call Setup Success Rate (CSSR)” in Ericsson system.
    Please suggest me which parameters can be used to imprve CSSR.

    I also have a problem with the definition of CSSR. Is it SDCCH establishment success rate or TCH establishment success rate?

    Best Regards,

    #46264 Reply
    Celltel
    Guest

    Hi Mahesh,

    I think CSSR is TCH establishment success rate. When you consider SDCCH establishment success rate, then you consider SMS & GPRS attempts too.

    #46265 Reply
    Mahesh
    Guest

    Hi Celltel,

    Thanks for your comment. Anyway do you have any idea how to improve CSSR in Ericsson system, what parameters can be used?

    Best Regards,

    #46266 Reply
    pix
    Guest

    you have to isolate different possibilities.. the CSSR is highly dependant on the formula defined by the vendor.. i’m not familiar with the Ericsson one, but there are at least those possibilities :

    1. TCH CONGESTION
    2. TCH RADIO FAILURE (interference, low coverage)
    3. HARDWARE ISSUES (TRX, ANC, TCU)

    The CSSR is a very vast indicator, a grouping of different indicators, you have to dig in further to really understand where your issue is, and what action can be taken to reduce it..

    #46267 Reply
    Alan
    Guest

    Hi Gurus,
    Can some one direct me toward definitions of GSM KPIs?

    #46268 Reply
    Mahesh
    Guest

    Hi Pix,

    Thanks very much for your idea.
    I will go through it and try to improve CSSR in our network.

    Best Regards,

    #46269 Reply
    Alan
    Guest

    Hi All,
    In nokia 2G EDGE network: IF I get TCH Channel failure rate above defined threshold at 50% of the slots of all TRXs in a sector: what could be the probable causes of it?

    #46270 Reply
    JR
    Guest

    Hi Alan,

    Sound like a broken TRX to me. have it replaced and check the performance after…
    cheers

    #46271 Reply
    Tufail
    Guest

    Hi Guys

    I am confused..

    wat is the differnce b/w TCH conjection and TCH blocking.

    Regards
    Tufail

    #46272 Reply
    JR
    Guest

    It’s just a different name for the same thing…
    TCH congestion = TCH blocking
    cheers,
    JR

    #46273 Reply
    Tomar
    Guest

    Hi Tufail,
    TCH Congestion means, that all channels are busy.
    TCH Blocking means, that all channels are busy and the next call can’t to be satisfy.
    In some statistical cases TCH Congestion doesn’t mean TCH Blocking. In reality, if you have high TCH Congestion, than you have TCH Blocking (72 second means 2% blocking probability)

    Best Regards

    #46274 Reply
    Euge
    Guest

    Hi Guyz, CSSR also depends on the SDCCH available coz wen a call is being setup the system sends signals to search for the intended mobile. This signaling requires SDCCH. so if u have few SDCCH & are all occupied @ that time then no signaling takes place for that call. Since signalling comes b4 TCH assignment the call will not be successiful.

    #46275 Reply
    Alan
    Guest

    can someone guide me toward some documents explaining the in depth meanings of KPI, like cogestion blocking etc…..will be appreciative….thanks…

    #46276 Reply
    RF
    Guest

    Dear

    TCH congestion mean there is no free TCH to make call or request handoff , and the blocking mean you have no channel to make call then you can’t access to the system which mean blocking

    Best Regards

    #46277 Reply
    Tufail
    Guest

    Hi Guys

    Thank you very much to all of you.

    Rgds
    Tufail

Viewing 15 posts - 1 through 15 (of 33 total)
Reply To: Improve Call Setup Succes Rate
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