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UL/DL TBF establishment failures_Radio_

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  • #65301 Reply
    IAn
    Guest

    Dear Experts,

    We are in ALU B10, and experiencing a lot of
    NB_DL_TBF_EST_FAIL_RADIO_PB_PMMFS 
    +

    NB_UL_TBF_EST_FAIL_RADIO_PB_PMMFS

    Anybody would give me an idea why we are experiencing high values within this counters when Circuit switch CSSR is 99% and UL TBF establishment rate is as low as 85%.

    Thanks
    Ian

    #65302 Reply
    pix
    Guest

    hi,

    first of all, check that your init CS and init MCS are not set too high. try to decrease them to CS-2 and MCS-6, or even CS-1 and MCS-1.

    second thing : did you activate the NC2 reselection / redirection ? If yes, then try to disable it, just to see.

    If it doesn’t change anything, then it’s perhaps a system failure. try to restart/reset your GPRS in the GPU… (or ask advice to your TAC about this, it’s not my field of expertise !)

    cheers
    pix

    #65303 Reply
    Ian
    Guest

    Hi Pix,

    Thanks for comments; Init MCS are low, MCS3 for UL, MCS6 for DL; CS2 for UL/DL;

    NC2 is not activate;

    Have you heard about solving this problem by a reset ?

    BR
    Yann

    #65304 Reply
    pix
    Guest

    hi,

    such poor qos is usually linked to a soft-problem that can be fixed by a reset of some sort. But I don’t know for sure what should be reset.

    regards
    pix

    #65305 Reply
    Ian
    Guest

    Hi Pix,

    Apparently they installed a new MFS around this time, and TBF failures started..reset already been performed with no success.

    BR
    Ian

    #65306 Reply
    pix
    Guest

    ian,

    usually the MFS’s are installed by ALU team, so ask them to fix the problem. it is clearly a misbehaviour of this particular MFS. Can you isolate a GPU on which the cells are more faulty than elsewhere ? or maybe an AterPS link ?

    Cheers
    pix

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