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Minimize interference using power contro

Viewing 12 posts - 1 through 12 (of 12 total)
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  • #66930 Reply
    TD
    Guest

    Hi All,
    Please help by as how can i Minimize interference by using power control. Place is hilly terrain with low inter site distance. Varies from 300 mts to 700 mts with tight BCCH planning. Window size is 6 with avg period 2(UL/DL).UL/DL level increase 22 and decrease 30.UL/DL Quality increase 2 and decrease 0. Px 3 Nx 4.

    Please help as I am waiting for your eagar suggestion.

    #66931 Reply
    pix
    Guest

    hi TD,

    could list all your parameters related to power control, in a neat way ?

    please search for other posts related to power control, you’ll find good info.

    #66932 Reply
    TD
    Guest

    Hi Pix,
    Thanks for replying.UL Power control and DL power control is enabled.
    POC Sampling,

    PcUlLevWindow:6,Weight value:2,
    PcDlLevWindow:6,Weight value:2,
    PcUlQualWindow:6,Weight value:2,
    PcDlQualWindow:6,Weight value:2,
    Min interval of power control:2,2,2,2

    POC Table:
    Increase/Decrease Step size:0,
    MsTxPwrMax:5,MsTxPwrMin:16,BsTxPwrMin:10,Increase uplink level:22,Decrease uplink level:30,Increase uplink quality:2,Decrease uplink quality:1,Increase downlink level:25,Decrease downlink level:35,Increase downlink quality:2,Decrease downlink quality:1,Px:3,Nx:4.

    #66933 Reply
    TD
    Guest

    Hi Pix,
    Also Preprocess value is 2. Is that any effect on it…Vendor is ZTE.

    Thanks.

    #66934 Reply
    pix
    Guest

    hi,

    i’m not familiar with zte algo, so i’m just gonna comment on the very basic stuff:

    POC Table:
    Increase/Decrease Step size:0,

    MsTxPwrMax:5,MsTxPwrMin:16 –> could you translate this in dBm ? 5 –> 33dBm ?? 16 –> ??? there is probably room for improvement here, so it is important we work on those.

    BsTxPwrMin:10 –> how much power is it ? 10dB less than the max power ? or Tx power = 10dBm ?

    Increase uplink level:22,Decrease uplink level:30 –> there is something to improve here. Try inc level = 25 and dec level = 15

    Increase uplink quality:2,Decrease uplink quality:1 — try inc qual = 3, dec qual = 1
    Increase downlink level:25, – ok
    Decrease downlink level:35, – ok
    Increase downlink quality:2, – try 3
    Decrease downlink quality:1,
    Px:3,Nx:4 – ok (i’m not familiar with those)

    regards
    pix

    #66935 Reply
    TD
    Guest

    Hi Pix,

    MsTxPwrMin:16 is 11 dBm.
    BsTxPwrMin:10 is 20 dBm.

    P and N value is 3 highest sample value out of 4 values.

    Can You please help me ?

    #66936 Reply
    pix
    Guest

    hi,
    ok
    so the previous recommendations are still valid, and on top of them you can do:
    MsTxPwrMin = 5dB or less (choose the minimum value)

    The step size = 0 is very surprising. It should be 2dB… but this is strongly algo dependent, so maybe 0 is fine. Could you please explain this one for me ?

    regards
    pix

    #66937 Reply
    TD
    Guest

    Hi Pix,
    Thanks for your reply.
    Step size 0 means 2 db.

    Aside to that is there any change i can do with Ho Parameter.

    Rxlevmin 15 for all cells.
    Uplink receive level 15.
    Downlink receive level 15.

    Please suggest.

    #66938 Reply
    pix
    Guest

    TD,

    I gave you a list of changes to do… Have you applied them ? what’s the result ?

    #66939 Reply
    TD
    Guest

    Hi pix,
    I Will Make this changes for 5 cells. But Need to Wait for 48 Hrs. Will Join you and share the results.Thanks and will be back soon.

    #66940 Reply
    mannu
    Guest

    it cause uplink handover also

    #66941 Reply
    TAD
    Guest

    HI ALL ,
    I AM NOT WELL EQUIPPED IN GSM, PLEASE EXPLAIN THE MEANING OF THE FOLLOWING REPORTS –
    AMR Full Rate Speech Algo Fall Back_v1
    AMR_Full_Rate_Traffic_Carried
    AMR_Full_Rate_Traffic_Ratio
    AMR_Half_Rate_Traffic_Carried
    AMR_Half_Rate_Traffic_Ratio
    AMR_Traffic_Carried
    AMR_Traffic_Ratio
    EFR_Traffic_Carried
    Total Traffic
    THANKS IN ADVANCE

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