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Viewing 6 posts - 1 through 6 (of 6 total)
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  • 26th November 2009 at 08:40 #59778
    sushi
    Guest

    hi.. what is the advantage of using 32 kbps over 16 kbps radio signaling in abis interface?

    26th November 2009 at 17:20 #59779
    Pix
    Guest

    More throughput, in order to carry more signalling. This is useful when the TRX is carrying a lot of HR calls and/or a lot of SDCCH timeslots.

    Cheers,
    pix

    27th November 2009 at 01:26 #59780
    sushi
    Guest

    can this be congested? what is the indication in KPI stats? will this be reflected in sdcch blocking? tnx pix..

    27th November 2009 at 04:07 #59781
    Pix
    Guest

    Sushi,

    Yes, the RSL (radio signalling link on abis) can be congested. This is very bad for QoS because it will slow down all main procedures on SDCCH (call estab, SMS, LU). I would say that due to “cumulative” effect of the congestion (snowball), the procedures could even fail.
    To avoid RSL congestion, you must monitor the counter called “LapD Congestion”. On which system are you working ? ALU ?

    BR,
    pix

    27th November 2009 at 05:11 #59782
    sushi
    Guest

    thanks pix, im working on nokia system. what is the equivalent of “LapD congestion” counter to nsn?

    28th November 2009 at 06:22 #59783
    Bijoy
    Guest

    For NOKIA,use “ZDMF” command to see the LAPD statistical meters

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