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Improve Call Setup Succes Rate

Viewing 15 posts - 1 through 15 (of 33 total)
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  • 7th December 2006 at 09:09 #46263
    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,

    8th December 2006 at 04:24 #46264
    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.

    8th December 2006 at 04:27 #46265
    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,

    10th December 2006 at 00:16 #46266
    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..

    18th December 2006 at 18:05 #46267
    Alan
    Guest

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

    19th December 2006 at 11:14 #46268
    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,

    6th January 2007 at 21:47 #46269
    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?

    18th January 2007 at 17:12 #46270
    JR
    Guest

    Hi Alan,

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

    20th January 2007 at 12:31 #46271
    Tufail
    Guest

    Hi Guys

    I am confused..

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

    Regards
    Tufail

    22nd January 2007 at 07:21 #46272
    JR
    Guest

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

    22nd January 2007 at 07:30 #46273
    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

    24th January 2007 at 07:10 #46274
    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.

    24th January 2007 at 18:44 #46275
    Alan
    Guest

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

    25th January 2007 at 08:52 #46276
    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

    26th January 2007 at 08:35 #46277
    Tufail
    Guest

    Hi Guys

    Thank you very much to all of you.

    Rgds
    Tufail

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