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Thread: inter-layer handover

  1. #1
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    Default inter-layer handover

    dears,
    i have a confusion about inter-layer HO,
    if we have a normal cell (not concentric) and this cell suffers from TCH and SDCCH congestion on GSM on this cell, we increase or decrease inter-layer HO threshold on DCS to solve GSM congestion ?

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    Default Re: inter-layer handover

    that works, inter-ho layer HO threshold change in DCS cell can effects HO Probability from GSM900-DCS1800.

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    Default Re: inter-layer handover

    Quote Originally Posted by jayk View Post
    that works, inter-ho layer HO threshold change in DCS cell can effects HO Probability from GSM900-DCS1800.
    YES , i know that changing on it will make effect, i need to know i will increase or decrease inter-layer HO threshold on DCS ?

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    Default Re: inter-layer handover

    When the downlink level of a cell is lower than this threshold, the cell takes low priority in handover algorithm. If you increase it, traffic as well as congestion may decrease. This is valid only The layer or level of target cell is lower than that of the service cel

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    Default Re: inter-layer handover

    Quote Originally Posted by dgk82 View Post
    When the downlink level of a cell is lower than this threshold, the cell takes low priority in handover algorithm. If you increase it, traffic as well as congestion may decrease. This is valid only The layer or level of target cell is lower than that of the service cel
    ok if we have an example here,GSM higher layer is congested and i need to push traffic on lower layer DCS,i will increase inter-layer HO threshold on GSM to push traffic on DCS ?

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    Default Re: inter-layer handover

    Quote Originally Posted by eng.akhalifa View Post
    ok if we have an example here,GSM higher layer is congested and i need to push traffic on lower layer DCS,i will increase inter-layer HO threshold on GSM to push traffic on DCS ?
    can u plz mention the vendor

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    Default Re: inter-layer handover

    Quote Originally Posted by ventinel View Post
    can u plz mention the vendor
    the vendor is Huawei.

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    Default Re: inter-layer handover

    The equation for inter-layer HO is

    Filtered downlink RX level of the target cell ≥ Inter-layer HO Threshold + Adjacent Cell Inter-layer HO Hysteresis - 64

    Where "Inter-layer HO Threshold" is cell level parameter and "Adjacent Cell Inter-layer HO Hysteresis" is per relation parameter. So if you want to prefer a specific cell i.e., push traffic from 900 to 1800 of the same site than you should tune "Adjacent Cell Inter-layer HO Hysteresis" instead of "Inter-layer HO Threshold".

    Lowering the value of these parameters will cause shift in traffic from source cell to the target cell.

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    Default Re: inter-layer handover

    Quote Originally Posted by eng.akhalifa View Post
    YES , i know that changing on it will make effect, i need to know i will increase or decrease inter-layer HO threshold on DCS ?
    Increase in GSM900 and decrease in DCS 1800, will shift traffic to DCS1800 cells.

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    Default Re: inter-layer handover

    Quote Originally Posted by maahsan View Post
    The equation for inter-layer HO is

    Filtered downlink RX level of the target cell ≥ Inter-layer HO Threshold + Adjacent Cell Inter-layer HO Hysteresis - 64

    Where "Inter-layer HO Threshold" is cell level parameter and "Adjacent Cell Inter-layer HO Hysteresis" is per relation parameter. So if you want to prefer a specific cell i.e., push traffic from 900 to 1800 of the same site than you should tune "Adjacent Cell Inter-layer HO Hysteresis" instead of "Inter-layer HO Threshold".

    Lowering the value of these parameters will cause shift in traffic from source cell to the target cell.
    thanks, i think it will help

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