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Inter-cell HO Hys.

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  • #50357 Reply
    Rack
    Guest

    Hi Pix
    Can you tell us the benefit of Inter-cell HO Hys. parameter & with which parameter have to change with the condition please?

    Thanks

    #50358 Reply
    pix
    Guest

    Hello Rack,

    Intercell HO Hys. parameter ? what is it ?
    Is it the Hysteresis ? Are you talking about the HO MARGIN (from cause “better cell handover”) ?

    #50359 Reply
    amkam
    Guest

    inter-cell HO Hysteresis :
    has a defualt value : 4 for urban areas
    and value of 8 : in suburban or rural areas
    we use this hysteresis to avoid the ping pong handover when we dealing with no server dominant in a giving area .

    #50360 Reply
    speedy
    Guest

    hi pix !
    Can you tell us the benefit of Inter-cell HO Hys. parameter & with which parameter have to change with the condition please
    regards,

    #50361 Reply
    Abdel
    Guest

    Inter cell HO hystersis is a parameter which tries to make less handovers between cells with different Location areas to avoid to many signalling and location updates.

    #50362 Reply
    pix
    Guest

    i’m confused about this parameter, i don’t know its exact definition.
    Is it about Better cell Handover between two cells that belong to different LACs or between cells ?

    This is anyway a very simple parameter, isn’t it ? Try different settings, and do a drive test, you’ll certainly find the best value by yourself ?

    #50363 Reply
    Bilal
    Guest

    Abdel,

    You are mixing up HO_Hysteresis with “Cell Reselect Hysteresis”.

    HO Hysteresis is applied to every neighbor relation regardless of their LA and it is used in dedicated mode. Cell Reselect Hysteresis is used in idle mode re-selection only when the target and source belong to different LAs

    #50364 Reply
    sam
    Guest

    hi all,

    i had read that HO margin is being mixed up with HO hys, but this is not so. HO margin is basically the difference in values of serving and neighbour cell after which HO takes place. HO hys is basically the area where the serving and neighbour has approximately same values, and HO generally takes place beyond this area.

    #50365 Reply
    pix
    Guest

    sam,

    your definition of ho hyst is not very clear. “ho hyst is an area…” ?

    if HO Hyst is a parameter, and if it coexists with HO margin, then it must have a proper definition that differentiates it.

    #50366 Reply
    sam
    Guest

    pix,

    i mean to say that HO hys is a parameter which defines an area.

    now i think its clear whats HO margin and whats HO hys

    #50367 Reply
    pix
    Guest

    sam,

    it’s still not clear to me at all.. can you give me a typical value for ho hyst ?

    ho hyst = 1 square kilometer ?

    if ho hyst is an area, the unit must be in square kilometers.

    #50368 Reply
    sam
    Guest

    pix,

    i said its a parameter which defines an area….

    it has a step size of 2, by which you can increase or decrease its value.

    #50369 Reply
    Bilal
    Guest

    HO hysteresis is the value by which a neighbor cell’s Signal Strenght must exceed the serving cell’s Signal strength to make a handover. It does create a Hysteresis corridor around the nominal cell border to avoid the ping pong handovers.

    #50370 Reply
    Pix
    Guest

    Bilal,

    so that’s like the HO Margin, isn’t it ?

    #50371 Reply
    Bilal
    Guest

    Haven’t seen HO margin in Ericsson. Has it got the same function as Hysteresis?

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