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handvover delay_ zte bss

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  • 5th November 2007 at 14:30 #49358
    deep_k
    Guest

    can u pls read into the lines ??

    5th November 2007 at 15:52 #49359
    pix
    Guest

    deep k,

    samples count for PC : you can put it to “2”
    samples count for HO : should be > or = 4

    now let me translate your thresholds settings in a more “readable” way :

    in UL :
    HO LEV = -110 + 22 = -88dBm
    PC LEV = -86dBm to -76dBm
    HO QUAL = 3
    PC QUAL : 1 to 3

    in DL :
    HO LEV = -110 + 25 = -85dBm
    PC LEV = -82dBm to -72dBm
    HO QUAL = 3
    PC QUAL : 1 to 3

    Ok.
    You are triggering your HO way too fast !!
    These are my recommendations :
    Samples count for PC = 2

    HO QUAL (UL or DL) = 4
    UL/DL PC QUAL = 1 to 3 (good, don’t change it)

    DL HO LEV = -90dBm (20)
    UL HO LEV = -96dBm (14)

    DL PC LEV = -80 to -70 (20 to 30)
    UL PC LEV = -86 to -76 (24 to 34)

    Keep at least 10dB between your lower PC thresholds and your HO thresholds. And speed up the PC averagings.
    Check also your “step size” (incremental and decremental steps of power control. they should allow about 12dB increments in extreme situations).

    Regards,

    6th March 2008 at 11:16 #49360
    amkam
    Guest

    PBGT HO : it’s a HO algorithm based in the path loss , so it starts to search in real time for cell that meet the requirments of minimum path loss .
    PBGT HO its only triggered in the TCH channel and used to avoid ping pong HO in a non- dominant server , decrease over cell coverage and also it decrease the co-channel interference

    PBGT HO only triggered when the path loss of adjacent cell – the path loss of serving cell > PBGT HO thrsh .

    PBGT HO thrsh it’s a vender dependent but in my case
    it’s take a value 4dB for urban areas
    and a value of 8 dB for suburban

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