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High TCH Drop due to Bad Quality Uplink

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  • #66408 Reply
    wirahadi
    Guest

    Hello there…

    i have a problem in GSM900 system,one cell that i try to optimize have a problem with TCH drop Bad Quality uplink.

    in my opinion there is possibility external interference, and i try with change the BCCH.

    But there is no impact with change BCCH. Can any body help me to solve this problem.

    We use Ericsson system

    #66409 Reply
    pix
    Guest

    hi,

    have you tried changing the other frequencies ?
    if there is interference on bcch, the you would see bad call setup, sdcch drop, sdcch assignment failure and tch drop.
    if there is interference on non-bcch trx, then you’d see mostly tch drop, except if sdcch ts is also located on this trx. In which case you’d see call setup failures/sd drop/sd assign fail as well.

    #66410 Reply
    wirahadi
    Guest

    hi pix

    thank you for suggestion

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