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SDCCH handover

Viewing 7 posts - 1 through 7 (of 7 total)
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  • #46763 Reply
    Pavel
    Guest

    Hi people!

    Do snyone have expirience with SDCCH handover? I am interested in feasibility. And how it can be tested. Thanks.

    #46764 Reply
    Pix
    Guest

    Hi Pavel,

    It is quite hard to test SDCCH handover, you’ll mostly have to follow-up the QoS stats… it’s gonna hard to reproduce it during a drive-test.
    The only way I can imagine : write a long SMS (n x 160 char) it should give you time to force a HO.
    Or naturally cross a HO border.

    I always disable the SDCCH ho, because it doesn’t enhance the network in the end…

    Regards,
    pix

    #46765 Reply
    Tufail
    Guest

    Hi Pavel,

    SDCCH HO takes place when using DR/CLS(directed retry(nokia)/cell load sharing(ericsson)).

    Here wat happns, the call HOs to other cell due to congestion in the serving cell.

    Hope u can work on it.

    Rgds

    Tufail

    #46766 Reply
    pix
    Guest

    hello tufail,

    in alcatel systems, directed retry and sdcch handovers are different. i believe it is the same in other systems .. a sdcch ho goes from a sdcch from cell A to a sdcch from cell B..

    whereas a DR is from a sdcch of cell A to a TCH of cell B.

    #46767 Reply
    Tufail
    Guest

    Thanks Pix,

    I have read in Nokia and Ericsson manual wer thy call it SDCCH HO.

    I thank you for your comment, wat you are talking may also be correct but i dont abt it..

    Wat excalty SDCCH HO is?
    Wat is its significance?

    thanks for sharing ur comments.

    regards

    Tufail

    #46768 Reply
    Pix
    Guest

    SDCCH HO : it occurs during a SDCCH communication (or SDCCH phase). When the BSC detects a HO (PBGT or EMERGENCY), it triggers a HO to establish a SDCCH on a neighbor cell.

    DIRECTED RETRY : the SDCCH phase has ended and the call is in the Queue. If while in the queue, a HO is detected, the TCH ill be establish in a neighbor cell.

    FORCED DIRECTED RETRY : While in the queue, if RXLEV “capture” conditions are met on a neighbor cell, the TCH qill be establish on the neighbor cell.

    #46769 Reply
    RE
    Guest

    Hi all.

    Thanks for your ideas.
    Does SDCCH Handover any influence or efficacy on SDCCH Drop?

    Regards

Viewing 7 posts - 1 through 7 (of 7 total)
Reply To: SDCCH handover
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