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LAPD Overload

Viewing 12 posts - 1 through 12 (of 12 total)
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  • #45396 Reply
    ahmed
    Guest

    We are facing the problem with BTS Overload and some of them with reason LAPD overload. The TRX which configured in the site are untill 14 TRXs using 1 PCMB with 1 LPDLM. As we know that the Required LAPD capacity depends on the number of TRx per site and the number of measurement reports (MR)transmitted from the BTSs to the BSC and we also know that the LAPD signalling overload can be also caused by excessive signalling traffic volume or/and frequent retransmission on the LAPD links ( bad tranmission quality of the PCM lines or microwave links ).
    For anticipating this problems, What is the recomendation from Siemens about number of TRXs can be handled within 1 LPDLM so we can avoid the overload problem due to LAPD Overload?

    #45397 Reply
    Majid
    Guest

    please check your GPRS load,maybe it ‘s using your resourses.

    #45398 Reply
    TNT
    Guest

    Hi,
    What is LAPD PAGING OVERLOAD.

    #45399 Reply
    pix
    Guest

    hi,

    it means there are too many paging sent by the BSC to the BTS.
    I’m not familiar with your “alarm”, so either the LapD (on the Abis) is congested due to paging, or the PCH (on the air interface) is congested due to paging.

    You could try to investigate further, but a solution that would work in both case :
    step 1/ ensure that one LAC is handled only by one BSC (one BSC can have many LAC’s, but one LAC should not be handled by several BSC)
    step 2/ reduce the number of cells per LAC.

    cheers
    pix

    #45400 Reply
    Tanuj
    Guest

    Hi Ahmed

    Plz check the no. of resource LAPD cards present in the BSC, it seems that the no. of TRX have increased too much in the BSC, plz specify the equipment as we have faced such problem in ZTE iBSC

    Regards
    Tanuj

    #45401 Reply
    Chou
    Guest

    In technologies that use dynamic Abis and TRX signaling by a common Lapd, this can become congested if it exceeds a certain number of TRX. With a number of 12 TRX is better the creation of a second Lapd and sharing TRX load between them. The maximum number of TRX by Lapd depends on the traffic and signaling load in the air interface, that is on the coverage area that is serving the cell.

    #45402 Reply
    Israel Choque
    Guest

    Hi,

    anyone have any document for LAPD link Measurement on TRH devices in for Ericsson?

    Also require different counter description used for measurement of link i.e. CLONKFAIL, COVERLOAD, CBADFRAME..etc

    #45403 Reply
    pix
    Guest

    hi,

    all those info are in the cpi library, do you have access to it ?
    it’s located in the OSS.

    regards

    #45404 Reply
    jason
    Guest

    hi!
    How do I get to clear the LAPD PAGING overload alarm

    #45405 Reply
    Hospice
    Guest

    Dear please, I have the same issue. We have upgrad the frequence and have LAPD PAGING OVERLOAD on several node. plaese, help us solve this issue

    #45406 Reply
    seph chibanhila
    Guest

    LAPD Link Congestion what does it mean?how to clear this alarm

    #45407 Reply
    Faryad Mughal
    Guest

    Dear all
    plz share you experience that

    DCR can effect on LAPD???

Viewing 12 posts - 1 through 12 (of 12 total)
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