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SDCCH Drop

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  • #51591 Reply
    Andreas
    Guest

    i want to know the differents reason for sdcch drop and tch drop on Ericsson RBS

    #51592 Reply
    eng moreno
    Guest

    the difference is SDCCH is used before of call establish and only this channel is used for signaling. So Tch drop is when you have a call establish and a drop call can be for differents reasons (low signal of RX lev, TCH Sudden).

    #51593 Reply
    sharkie
    Guest

    what are some of the reasons of sdcch drop other than bad quality

    #51594 Reply
    pix
    Guest

    sharkie,

    you can check hardware (bts boards, bsc boards, abis link)
    check board congestion
    then perform Air or A bis interface trace in order to understand where is the actual problem. If it happens during the SDCCH phase, then it might happen during authentication, ciphering or call setup, or location update, etc. In one word, there might be a problem during the exchange of info between MS and MSC.

Viewing 4 posts - 1 through 4 (of 4 total)
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