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Thread: Primary CPICH Power

  1. #1
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    Post Primary CPICH Power

    Parameter Name: primaryCpichPower

    Description: Primary CPICH Power is the power to be used for transmitting the PCPICH

    Managed Object: UtranCell, ExternalUtranCell

    Element Manager Window: Radio Network/RBSs/IubLink/UtranCell/Properties/Common channel

    Element Manager Parameter Name: P-CPICH power (dBm)

    Unit: 0.1 dBm

    Range: -100 to 500

    Default: 270

    Recommended: Variable - Depends on Operator

    Syntax: -100 : -10 dBm, -99 : -9.9 dBm, -98 : -9.8 dBm ,…, 330 : 33 dBm ,…, 500 : 50 dBm

    Resolution: 1(= 0.1 dBm).

    RANOS Reference: RANOS Explorer/RNC/RBS_Group/UtranCell/Cell-Channel... (Cell and channel management)/Cells

    Function: Utran Cell

    Dependencies:Effect of Change: Change of this parameter effects pilot coverage e.r. handover areas, interference areas, traffic coverage areas. Too low value can lead to appearance of “coverage holes”. Too high value can lead to “near–far” effect or that cell is taking too much traffic. In the loaded co-sited network it can be that some problems we will be solving changing this parameter.

    Troubleshooting:
    This parameter should be investigated when the following problems are observed :
    Pilot Channel failure due to high downlink interference ( Possible causes: No dominant cell, Dominant interferer, Low best serving EcIo);
    Pilot Channel failure – out of pilot coverage (Possible causes:Low pilot channel power);
    Pilot pollution (Possible causes: No dominant cell);
    Uplink and Coverage pilot imbalance ( Possible causes: Large pilot power, UE in compressed mode);
    Uneven load distribution (Possible cause: Homogenous pilot setting in an irregular network),
    Random access procedure problem (Possible cause: PRACH and Pilot coverage imbalance) Handover

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  3. #2
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    good info cpich levels are critical for good coverage


  4. #3
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    Thank you. I'm studying about some parameters. It's so useful




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