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SDCCH ACCESS FAIL 100%

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #36825 Reply
    Erick
    Guest

    I work for an operator whose vendor is Alcatel and we are on BSS release B6. I have noted several cases of sudden increase in SDCCH ACCESS failure of 100% in quite a number of cells in the Network. In this situation, the SDCCH Success traffic is zero but supprisingly, i have got a very good call success and call setup rate. This could indicate that most calls are getting to TCH phase. Could anyone who has noted this situation assist me in solving it. NB: Results observed from the NPA.

    #36826 Reply
    Momu
    Guest

    Call set up success rate is a function of SDCCH drop and TCH assignment unsuccess rate. Since no calls are being established on the cell with 100% SDCCH ACCESS failure, SDCCH Drop = 0. The only unsuccess on TCH stage is during HO. The traffic being seen on the cell is only HO traffic. The only solution to this kind of problem, is either sector recreation or BTS recretion – srart with sector recreation at the OMCR – if not solved, recreate the BTS.

    #36827 Reply
    artiste
    Guest

    salut ERICK,
    pour bien comprendre ton problème, il faut savoir ton SDCCH ACCESS failure est radio ou BSS.
    si c’est un problème radio il faut vérifier:
    1.RX cables de la BTS
    2.Interferences on SDCCH
    3.unbalanced power budget
    4.mauvaise vouverture
    and after you can see creation on OMCR.

    #36828 Reply
    optim
    Guest

    how can I sol a sdcch congestion

    #36829 Reply
    Vanderley
    Guest

    Add additional SDCCH’s, or mixed TCH/SDCCH. Optimize location area borders. Change the behaviour in idle mode.

    #36830 Reply
    mohsen
    Guest

    Hi ,
    I just want to know how can i improve SDCCH ACCESS rate in NOKIA BSC ?

    #36831 Reply
    imqureshi
    Guest

    erick

    main vendors never include sdcch
    access in cssr formula thats why
    you have excellec cssr this is the rason you need to monitor
    sdcch access phase 100% fail might be due to faulty hardware or interference issue
    peace! 😀

    #36832 Reply
    optima
    Guest

    Hi ,
    I just want to know how can i improve SDCCH ACCESS rate in NOKIA BSC ?

    #36833 Reply
    appu
    Guest

    how to improve SASR of ALU ZTE border cell.

Viewing 9 posts - 1 through 9 (of 9 total)
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