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Call drop in 3G -UMTS

Viewing 15 posts - 16 through 30 (of 34 total)
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  • #57266 Reply
    pix
    Guest

    hi Nios

    To reduce or increase the coverage of a cell, you may (primarily) tune the CPICH power :
    primaryCpichPower
    Amos: get utranCell primaryCpichPower
    By default, use 330 (ie. 33dBm)
    Dependencies: primaryCpichPower less than maximumTransmissionPower

    Decreasing the cpich will reduce the cell coverage, but also decrease the Ec/No of the users inside the cell. They will “hear” more interferences.

    A good way to check the coverage distance of a cell is to extract the counter “pmPropagationDelay”, at RBS level (class prach)
    Amos : pmx prach pmPropagationDelay -m 3 -a
    Within one sector, only analyse cells with highest amount of samples (ie. where the UE are camping).

    Regards,
    pix

    #57267 Reply
    Parsa48
    Guest

    I have a lot of cs drop calls in Ericsson baseband 5216 for u900 technology please help me

    #57268 Reply
    pix
    Guest

    hi,

    Many call drops in U900 is usually caused by users getting too low coverage of u900, without possibility of handover to another cell.

    check the neighbour relation with GSM cells, check the event 2d thresholds, the 3a threshold.

    Also check 3G neighbours…

    but really, the first step would be to investigate the kpis and the topology, and understand what is causing the drops.

    Cheers
    pix

    #57269 Reply
    Pawan Sharma
    Guest

    Hi,

    as per the Huawei please check the given switch for CDR improvement.
    OptimizationSwitch(BSC6900,BSC6910): SRB_RESET_RL_SETUP_SWITCH
    OptimizationSwitch(BSC6900,BSC6910): MC_RL_RESET_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): RB_SETUP_RL_REEST_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): RB_SETUP_ENHANCE_RL_REEST_SWITCH
    OptimizationSwitch(BSC6900,BSC6910): ASU_RL_RESET_SWITCH
    OptimizationSwitch(BSC6900,BSC6910): RB_RECFG_RL_REEST_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): RBRECFG_ENH_RL_REEST_SWITCH
    ImprovementSwitch(BSC6900,BSC6910): NON_DCCC_RBRECFG_RL_REEST_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): TRB_RESET_RL_REEST_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): RB_REL_RL_REEST_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): PHY_RECFG_REEST_SWITCH
    PROCESSSWITCH4(BSC6910,BSC6900): PHYCHRECFG_ENH_RL_REEST_SWITCH
    OptimizationSwitch(BSC6900,BSC6910): CS_RL_SETUP_SWITCH
    OptimizationSwitch(BSC6900,BSC6910): PS_RL_SETUP_SWITCH
    OptimizationSwitch4(BSC6900,BSC6910): RB_RLREEST_AM_TRB_RLC_REEST_SWITCH
    OptimizationSwitch4(BSC6900,BSC6910): RB_SETUP_UM_TRB_RLREEST_ADJUD_OPT_SWITCH

    #57270 Reply
    Parsa48
    Guest

    I am working in Ericsson 3g and 4g networks. There’s a problem in 3G network(u900 with baseband 5216) .the uplink quality is very bad and in road area the subscribe could not use 3g data and in most times they have edge. Please guide me to know the reason and how to solve the problem

    #57271 Reply
    LEMAURE
    Guest

    Dear PARSA
    make sure the neighboring GSM cells are well refarmed. Did you perform SSV on those sites?

    #57272 Reply
    hungryforknowledge247
    Guest

    Hi Parsa48,
    Poor uplink quality on U900 could be due to many reasons.
    Have you checked dominance in the area.
    Is it just one site or cluster of sites.
    Check for Scrambling code clashes.
    Get it drive tested and analyse log files.
    Check if there is external interference.
    What is the value of Prx Noise you are getting.
    Check 3G-2G and 3G-3G neighbours.

    #57273 Reply
    Parsa48
    Guest

    Hi to all dear
    What is the fast dormancy feature?
    How can iI check and adjust in Ericsson ran?

    #57274 Reply
    Parsa48
    Guest

    Kindly anyone help me for increasing wcdma voice traffic than gsm voice traffic in Ericsson network

    #57275 Reply
    hungryforknowledge247
    Guest

    Hi Parsa48,
    Fast dormany is something which try and save mobiles battery consumption when link between mobile and network is idle

    #57276 Reply
    hungryforknowledge247
    Guest

    Hi Parsa48,
    To increase traffic on 3G you can make reselection from 2G to 3G easier by changing reselection criteria. Make it reselect to 3G quicker and on lower thresholds.
    And once this is done you can make calls to be more stickier to 3G. This can be done by chaning 3G to 2G handover criteria. Hope this helps.

    #57277 Reply
    hicham27
    Guest

    could you please help me to kown the reasons of drop (speach , HS,R99 …..)

    #57278 Reply
    Parsa48
    Guest

    Hi dear all
    Kindly please help me about iub frame loss in Ericsson Baseband 5216 and solutions for it.

    #57279 Reply
    Parsa48
    Guest

    Iub frame loss issues
    In one of site with Ericsson baseband 5216 node there is huge of iub frame loss. Please help me to solve it.

    #57280 Reply
    Parsa48
    Guest

    Hi all dear friends
    I am facing with decreasing of wcdma cell availability in some Ericsson nodeb site. I, m be so happy if anyone help me to solve this issue.

Viewing 15 posts - 16 through 30 (of 34 total)
Reply To: Call drop in 3G -UMTS
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