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Location Area Update Failure

Viewing 11 posts - 1 through 11 (of 11 total)
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  • #55401 Reply
    Baig
    Guest

    hi
    What is the reason for the Location Area update failure. Sites have been rehomed to new BSC. All the parameter definations are correct in BSC and sites are in the same BSC as well but there are continues LAC update failures in the region.

    #55402 Reply
    adcguy
    Guest

    Is the new BSC under a different LAC? If so, they hv to be redefined in the MSC(fairly obvious, but its easy to forget such stuff!! :))

    #55403 Reply
    subarn
    Guest

    There are some cells in location area borders with high failure. when i reduced TA and change the ARFCN , failure reduced but still the failure is around 8000 in whole day. when i again reduced CRO and CRH of 1800 cell then failure increased upto 10000. please suggest what could be the reason for this and how to solve this types of problems.

    #55404 Reply
    Agha
    Guest

    Subarn,
    what abt SD drops?

    #55405 Reply
    subarn
    Guest

    There is SD assgnment failures somehow but no significant SD drops and congestion exist.

    #55406 Reply
    kammaz
    Guest

    Hi it seams to be a HW pb. did you try to restart the worst cell? is this a Alcatel BSC’s?

    #55407 Reply
    Gaurab
    Guest

    Hi guys, i have faced an issue of Data Working while mobile in no service mode and post analysis of log a Location Area Update fails Post Authentication failure has been noticed. Suggesting a resolution to this issue would be of great help.

    #55408 Reply
    LEMAURE
    Guest

    which technology is that?
    has routing area update when through normally?

    #55409 Reply
    Gaurab
    Guest

    This is happening in vodafone in a specific msc..but during DT lig analysis it has been seen that Loc update fails mostly after authentication failure..which seems to be an authentication failure of TMSI.Plz suggest how far i am correct

    #55410 Reply
    LEMAURE
    Guest

    Trace should provide more detail on LU failure reason. It may be TMSI allocation or not…
    Also check on the timers T3250,3260,3270 and make sure they are set to 5 sec

    #55411 Reply
    Ayat
    Guest

    Hi
    How to control “Unknown subscriber” in LOC Up errors by delete huge inactive SIM from HLR

Viewing 11 posts - 1 through 11 (of 11 total)
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