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No response to immediate assignment

Viewing 15 posts - 16 through 30 (of 44 total)
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  • #58793 Reply
    Aash
    Guest

    Hi,
    RACH ACCESS MIN too much as I saw -110 even the BTS dose not support weaker than … depend on RX_lev_access min as well; and don’t forget the phantom rach that will be arrive to the bts, with that you can check the T200, N200 with that is better if you check the Uplink\downlink balance,

    good luck

    #58794 Reply
    Krishka
    Guest

    ACCMIN set to 104 – no changes in any statistics. From my point of view it can be problem with timers or with MS…

    #58795 Reply
    Bijoy
    Guest

    Hi Kryshka
    Have you checked that whether this is happening for any particular type of CM_Service_Req(like MOC,MTC,etc), or for all types

    #58796 Reply
    Kryshka
    Guest

    From my log, I found the only CM_req type:
    “Meaning of establishment cause: Answer to paging TCH/F in dual rate”. Immediate assignment messages for “good” assignment and bad do not have any differences.

    #58797 Reply
    Bijoy
    Guest

    Hi Kryshka
    Have you checked all the paging related parameters?
    You can also check from MSC side why the paging response is so poor.

    #58798 Reply
    Kryshka
    Guest

    I checked MSC parameters, – paging strategy – 1 page – TMSI, second after 6s – IMSI. In MSC there are only two timers for paging control – T3113 – 6s, T3101 – 4s. So MS should try to send any message but he don’t. Now checking Abis and TRH devices loads…

    #58799 Reply
    hiya
    Guest

    Hi,
    put the RACh Access min to -105 as recommended before if you are using the access min -104,
    Change T200 but first inform us the existing value then we decide,
    did you checked the uplink\downlink balance?
    regards

    #58800 Reply
    Samuel
    Guest

    yes very simple and nice recommended points; thanks,
    please inform us the value of T200, result of Uplink\downlink balance then we see the result

    #58801 Reply
    Kryshka
    Guest

    Hi Hiya,
    In ericsson I didn’t find how to set RACH access min, – there is only accmin… The balance from MRR shows only few dB difference to stronger DL side. Where can I find T200 timer settings, BSC?

    #58802 Reply
    Bijoy
    Guest

    Hi Kryshka
    Is this happening only in some particular cell or for all cells in the BSC.
    Also please tell me the value of
    1.CCONGS
    2.CESTCHACTIV
    3.CESTIMMASS

    #58803 Reply
    Kryshka
    Guest

    Timer T200 settings are 240ms and the K value (window size) to 1 for OML link and 2 for RSL link.
    Day
    CCONGS=54, CESTCHACTIV=54,
    CESTIMASS=1001

    #58804 Reply
    Bijoy
    Guest

    Hi Kryshka.
    Is it happening in all cells of the BSC?
    Have you tried the follwing:
    1.Have you shifted SDCCH in a different CHGR.
    2Is SDCCH HO enabled in your BSC.

    #58805 Reply
    Kryshka
    Guest

    It happens in whole network. SDCCH HO was active, but disabled in the weekend – still any visible improvement. SDCCH shift to other CHGROUP still didn’t implemented – I will check in the next steps.

    #58806 Reply
    Kryshka
    Guest

    It’s really interesting that the same thing happens not in system BH but also at the night time when all traffic is really low. As example phone didn’t answer to immediate assignemnt in 03:05 am. It’s eliminate all issues that rise from resources congestion. Still any answer…

    #58807 Reply
    Pix
    Guest

    Kryshka,

    There are a lot of support already, I don’t want to add any confusion. Just, I read that you have done a drivetest with NEMO, and the NEMO phone itself doesn’t answer to the immediate assgn.

    That’s great 🙂

    Could you copy the trace (all the layer 3 messages content + timestamp) here ?

    According to your description, I expect the following messages:
    1/ CHANNEL REQUEST
    2/ IMM. ASSG.
    3/ PAGING
    4/ …

    But perhaps I am missing out some of them. Please list all of them 🙂

    Best Regards,
    pix

Viewing 15 posts - 16 through 30 (of 44 total)
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