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gsm configurations

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  • #44203 Reply
    BlessCurlz
    Guest

    hi Im a fresh graduate engineer. I really need to know information regarding things like 8/8/8 configuration – what exactly it means and how would i know how much BCCH and TCH channel to assign?
    please help

    #44204 Reply
    SCORP
    Guest

    That is 8 TRX Per sector.
    Each TRX has 8 TS.
    So 64 TS Per Sector.

    3 Sectors-TOTAL 64*3 TS.

    Each SECTOR needs its own BCCH.
    I am not sure how many with this config.

    I am just CORE-Guy.

    1+1+1 ?

    Rgds

    #44205 Reply
    tufial
    Guest

    we need 1 BCCH for a sector and as for as singanalling is concern u need to calculate it.

    for a 444 site we take 2 TS per sector for signalling,

    it depends for on much ur signalling load is like

    (no. of call attempts*avg SDCCH holhing time)/ 3600 + (no. of LU * avg Sdcch holding time)/3600.

    n da no. of erlang u get.. look for no of channel required on Erlang table.

    that will gve u no. of channel for signalling

    regards
    tufail

    #44206 Reply
    tch
    Guest

    hello,
    easy way to find out how many sdcchs you need is (NUMBER OF TRX)/2…
    so…
    TRX SDCCH
    1 combinedBCCH
    2 1
    3 2
    4 2
    5 3
    6 3
    7 4
    8 4….

    #44207 Reply
    BlessCurlz
    Guest

    Thanks all..
    now lets say:
    i have 50 gsm channel , and im using 4/4/4 configuration. Frequency Re-use is 5.
    No of sites is 100.
    and the size of the area will be 1000 sqrkm.

    so how should i calculate the allowed BCCH and ARFCN?
    please advise.

Viewing 5 posts - 1 through 5 (of 5 total)
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