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Uplink quality poor

Viewing 11 posts - 1 through 11 (of 11 total)
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  • #48890 Reply
    Ajay
    Guest

    Hi to all,
    In our network(GSM 900), we are facing lots of problem in uplink quality in one sector. Despite the Uplink quality is worst, Downlink quality is excellent. What could be the probable reason for this.
    Thanks.

    #48891 Reply
    pix
    Guest

    have you checked the path balance of the cell ? (=low ul level and good dl level)

    i can see two possible reasons for a poor ul quality :
    1. problem in the hardware, and especially in the TRE or the combiner/duplexer
    2. ul interference coming from another cell

    you can try to isolate the cause by checking the UL quality TRX per TRX, and by changing the frequencies.

    #48892 Reply
    Tomar
    Guest

    Hi Ajay,
    check UL Idle band Interference meas. If it is posible on each TRX.

    The 3. case could be also disturbance from other sources. We have problem on the cell, which cover jail.

    BR
    Tomar

    #48893 Reply
    Ranjan
    Guest

    How can we check the path balance in ericsson systems?

    #48894 Reply
    mannu
    Guest

    Dear Pix,

    I am also facing the same problem uplink quality is very bad but downlink quality is good i am working on ALU bts.

    #48895 Reply
    mm
    Guest

    IN FOUR OF MY BSCs THE TCH BLOCKING % ARE AS UNDER –
    BSC1-9.95%
    BSC2-1.72%
    BSC3-12.57%
    BSC4-20.60%
    CAN THERE BE ANY PARTICULAR REASON AT THE BSC LEVEL FOR THIS HIGH TCH BLOCKING RATE ??
    WILL ANYONE HELP PLEASE ?
    Mr.PIX,PLEASE EXPLAIN

    #48896 Reply
    Eng Solomon
    Guest

    In the UP link, UE Sends MSGs to Node B, which is capable of Detecting the UE for paging/Signaling puposes. However, the problem arises if hardware is Not functioning well, i.e TRXs or Combiner/Duplexer, Also check that the power is surficient enough in the system…BADICM(Cause effect) can also be one though brought by the Power incerficiency.

    I hope that will help. thanks.

    #48897 Reply
    Yann3112
    Guest

    Uplink quality is too bad.How to fix it??

    #48898 Reply
    LEMAURE
    Guest

    check BADICM stats and UL RXLEV distribution.
    you might be facing HW issues, interferences or coverage issues)

    #48899 Reply
    opti_baby
    Guest

    as usual, if that is FDD system, uplink interference cause the problem, use a full band scanner to check the whole band’s floor noise (uplink), if that is a TDD system (LTE), you may use the time slot scanning funtion to scan all the symbol and RE.

    #48900 Reply
    Parsa48
    Guest

    I have a lot uplink rx quality in 3G ran Ericsson please someone guide me to solve this problem

Viewing 11 posts - 1 through 11 (of 11 total)
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