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SDCCH ON 1800 Band Ericsson

  • This topic has 8 replies, 1 voice, and was last updated 10 years ago by SHELDON.
Viewing 9 posts - 1 through 9 (of 9 total)
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  • #66102 Reply
    NJ
    Guest

    Hi all,

    Why SDCCH channels in 1800 band on cell MBC(900-1800) doesn’t take any traffic? CHGR=0 900, CHGR=1 1800.

    NJ

    #66103 Reply
    SHELDON
    Guest

    Hi NJ

    Does the problem occur on all your cells or only a few?

    Rgds

    #66104 Reply
    NJ
    Guest

    Hi Sheldon,

    It happens for all sites MBC,
    My Command is:
    RLACC:CELL=xxx,CHGR=1,incl,sdcch=x;
    CHGR1 :1800.

    BR.

    #66105 Reply
    SHELDON
    Guest

    Hi NJ,

    If it’s happening on all MBC sites, then it’s definitely a problem with your MBC parameters. Which band is UL and which is OL?

    Check and make sure that BCCD is set to yes on the 1800 channel group (use RLCHP).

    Also check your channel allocation profile (CHAP) to make sure you have not excluded any of the subcells from Immediate assignment. (CHAP 5,11 or 12).

    Regards,
    SHELDON

    #66106 Reply
    NJ
    Guest

    Hi Sheldon,
    I ve changed to YES the BCCD on CHGR1 (OL,1800).
    The CHAP for all MBC sites =10, Could you tell me the right value?

    Thanks and regards

    #66107 Reply
    NJ
    Guest

    Hiall,

    Does anyone know which CHAP to use on E// MBC cells?

    BR,

    NJ

    #66108 Reply
    SHELDON
    Guest

    Hi NJ,

    Sorry for my delayed response.

    Apparently, immediate assignment can only be done in the BCCH frequency band in a multiband cell (according to ericsson).

    This probably accounts for your problem.

    Contact ericsson support and see if they can help you out.

    Regards,
    SHELDON

    #66109 Reply
    Mania
    Guest

    @ SHELDON: Normally this is the case with other vendors as concentric cells only SDCCH is defined on BCCH band as that defines the coverage? however in Erricson there is a stat as well as allowance for SDCCH_Congestin (UL/OL) what does this signify?

    #66110 Reply
    SHELDON
    Guest

    Mania,

    Yes, it makes sense to put your SDCCH on the BCCH band. However, I find it difficult to understand why there should be a restriction.

    I think the stats you mentioned only apply in the cases where you have ONLY UL/OL subcells, but not a multiband structure(remember UL/OL cells does not necessarily mean multiband cells).

    BRs

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Reply To: SDCCH ON 1800 Band Ericsson
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