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UL+DL TBF Drop

Viewing 15 posts - 1 through 15 (of 15 total)
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  • #56902 Reply
    Jacky
    Guest

    Hi all,

    Since an inter BSC site mutation, we observed that the UL and DL TBF Drop rate increased in the BSC source with MSC9 usage increase and GCH Load decrease. I assume that this behaviour is normal since MCS9 usage induces more TBF retransmission and therefore more TBF Drop. any comment about this behaviour plz?

    Thanks

    #56903 Reply
    Rex
    Guest

    Hi Jacky,
    I think until the TBF_Establishment_Failure (UL/DL)is low, there is no wory about that.
    Regards,

    #56904 Reply
    Jacky
    Guest

    Thanks Rex, can i have a threshold for TBF_Establishment_Failure(UL/DL), otherwise how explain the TBF drop increase?

    #56905 Reply
    Rex
    Guest

    Hi Jacky,
    the threshold for tbf_est_failure in our net is 5%. About TBF drop increase, I’m not sure. Maybe redeclaring NSVCs on SGSN side will improve (decrease) tbf drop, once we tried and there were improvements.
    Regards,

    #56906 Reply
    Jacky
    Guest

    Thanks Rex for the tbf_est_failure we have the same values as yours.

    #56907 Reply
    Anis Zayani
    Guest

    hello
    with drive test tool as TEMS Investigation where can I locate the TBF DROP rate and the TBF Establishement succes rate

    thanks

    #56908 Reply
    Mac
    Guest

    Hi Jacky,
    Can u pl tel what exactly do u mean by redeclaring NSVCs on SGSN side?
    And I too am interested to know answer to Anis’s querry.
    Thnx in advance!!

    #56909 Reply
    Mac
    Guest

    Hi Jacky,
    INIT MCS parameters are recommended fir TBF drop improvement. Just to share with you, I changed the INIT MCS (DL/UL) from 6/5 to 2/1 & I got good improvement in the Attach Success rate!!! But there was no impact on TBF drop. Perhaps u may try & share the results.
    Thanks.

    #56910 Reply
    Hamza
    Guest

    any chance of improving UL TBF Est. Success Rate?

    what parameters to hit?!

    all this data for 2.5G is meaningless

    #56911 Reply
    Pix
    Guest

    Hello,

    Wrong thread… try this one :
    http://www.erlang.com/forum/erlang/thread.htx?thread=3476

    cheers
    pix

    #56912 Reply
    VIKAS
    Guest

    WAT IS THE RLTIMEOUT IN GPRS?

    #56913 Reply
    pix
    Guest

    Vikkas,

    the equivalent for “TBF drop” is called N3101 and N3103.
    Cheers
    pix

    #56914 Reply
    van_guen
    Guest

    Hi Pix,
    could you please, give me more information about drops due to N3101,N3103 and Npolling, because I have problems with high level of TBF Drops in UL. The N3101,N3103 and Npolling drop causes are so high…
    Is it possible to adjust some parameter related to N3101 and N3103?
    The problems with TBF_Drop_UL comes after Extended_TBF_UL activation.
    Thank you in advance and wish you Happy Easter holiday :))
    Rado_bg

    #56915 Reply
    Debashis
    Guest

    What is explain more on RLTIMEOUT and INIT MCS (DL/UL) from 6/5 to 2/1.

    Reragds,

    Debashis

    #56916 Reply
    Sergio
    Guest

    In the formula we have the accessibility seguintres plots: SDCCH Blocking, Fall and Fail SDCCH channel traffic. I wonder what the relationship between them for this indicator.

Viewing 15 posts - 1 through 15 (of 15 total)
Reply To: UL+DL TBF Drop
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