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whats HO_SDCCH for?

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  • #50476 Reply
    Lobo
    Guest

    hi all!,,., whats the effect of this if enabled/disabled? tq

    #50477 Reply
    pix
    Guest

    enable/disable the handover while the MS is using a SDCCH.
    For example, it means the MS is on SDCCH in a cell (for any reason, call setup, LU, SMS,…) and a better neighbor cell is measured. A HO will be performed from SDCCH(cell 1) to SDCCH(cell 2).

    Other possibilities : low level ul or dl, bad quality ul or dl, etc. (all standard HO causes are verified)

    #50478 Reply
    RK
    Guest

    I also believe for directed re-try handovers you’ll need to have HO on SDCCH enabled. Directed retry is a good feature for controlling TCH resource blocking.

    RK

    #50479 Reply
    TNS
    Guest

    Hi, RK.

    The Mean Holding Time for SDCCH is 3 to 4 sec. SDCCH HO is SDCCH to SDCCH HO during this time. It’s because of the radio conditions.

    Directed Retry and Forced Directed Retry is SDCCH ( cell A ) to TCH ( cell B ) because of TCH ( cell A ) blocking. You are right – it’s powerful mechanism to fight blocking with.

    BR,
    TNS

    #50480 Reply
    Pix
    Guest

    I confirm : SDCCH HO = disable does not disable the directed retry and forced directed retry.
    This configuration :
    SDCCH HO = DISABLE
    EN DR = ENABLE
    EN FDR = ENABLE

    means :

    SDCCH to SDCCH HO is disabled, but DR and FDR are allowed without any restriction !

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Reply To: Reply #50477 in whats HO_SDCCH for?
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