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Reason for not taking traffic

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  • #55837 Reply

    Hi everybody,
    I have a problem :
    In a Nokia ultrasite 1800 band with 4+4+4 configuration, TRX 7&8 don’t take traffic at all for some time.
    We did some swaps in TRXs,BB2Fs,Duplexers and even cables but nothing changed and still no traffic.What is the reason and what should we do?

    #55838 Reply

    is there congestion in the cell ?

    if no:
    Perhaps TRX from 1 to 6 are taking all the traffic already, and Nokia TRX allocation algorithm prefers to “reserve” those TRX only if there is more traffic.

    if yes:
    did you block access to these TRX (preference mark ?) perhaps only PS traffic can be allocated there ?
    if you lock other TRX 1…6, can the TRX 7 and 8 carry traffic?
    this is a strange case, sorry i can’t help more…

    when you say 4/4/4 configuration… what do you mean by TRX 7 and TRX 8 ?? Which cell do they belong to?

    #55839 Reply

    Can you pleaseCheck the report 196 & 208 for these TRXs also.

    #55840 Reply

    Thank you PIx and Ajay,

    Pix,by 4/4/4 I mean there are totally 12 TRXs and 4 TRX per each cell so TRX 7&8 belong to second sector (cell) and yes by blocking the other 2 TRX in that cell(5&6) these 2 TRX took traffic!
    May be there is really no traffic to take!! how can I find out this?


    #55841 Reply

    Well, what is the current traffic_erlang of this cell ?

    if it’s less than 8 erlangs, then it’s normal that trx 7 and 8 don’t take traffic.

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