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Training sequence codes

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  • #41984 Reply
    jack
    Guest

    hi MR.pix
    please send me this resource (“how to build a Mobile Station, Layer 1” and the DVD’s of “Biography of a GSM burst, Complete Seasons 1 to 10”.)
    i really need this resources.
    please help me.
    jack_erlang@hotmail.com

    #41985 Reply
    Pix
    Guest

    I can see you need resources.

    Do not panic : it was just a joke.
    And as usual, a terribly bad one.

    #41986 Reply
    jack
    Guest

    hi
    please dont kidding with me.
    my job is really in dangerous.
    i need to update my information about GSM.
    you can help me,why dont do this???

    #41987 Reply
    Pix
    Guest

    If you have any question, I’d be happy to help you.
    I don’t have any document that I can share though.

    All books about GSM are the same. You read one and that’s enough… What is more important is
    1. to get technical docs from the vendors
    2. practise on live network.

    cheers
    pix

    #41988 Reply
    jack
    Guest

    thanx pix.
    i understand you.
    i have one question.
    i my network in every cell i have a lot of SDDCH release due to this abnormal release:
    SDCCH failure due to an Abis interface failure in call set-up.

    the interesting thing is:
    for this links i have call duration varies b/w 1 to 10s.
    of course a lot of them0s.
    of course a lot of them is 0s.

    how i can decrease it??

    #41989 Reply
    Mania
    Guest

    Like the “On which burst is broadcasted the BSIC” part to put things in prespective.
    So I think we can safely close this thread as a lot has been said on TSC.
    By the way who, how and when closes the threads.
    Just saw one in red closed the other day.

    #41990 Reply
    Pix
    Guest

    Mania : i don’t know about this. I think it is the webmaster.

    Jack : abis problem means that the link that joins the BSC and this BTS is bad. Check the transmission equipment (microwave ?), if there are alarms or poor BER, etc.

    pix

    #41991 Reply
    Paul
    Guest

    Dear Pix,

    Thanks for your explanation, it’s helpful.

    Br,

    #41992 Reply
    South africa
    Guest

    Hi Guys

    Wonder if you can help with some suggestion .

    I have lost some EXT Hand Over attempts and since then the DCR has deterioted more than 1 % on the BSC level.

    No Changes on the database was done at any of these cells that has just stoped EXT Hand Overs.

    #41993 Reply
    Pix
    Guest

    Hello south africa.

    are you working at bss side, or at nss side ?

    this kind of problems is exclusively due to nss misconfigurations. And if they tell you they didn’t change anything, then you can be certain they DID.

    In some rare cases, it could be due to faults in the BSS database (which is “corrupted”). You can try to do a database cleanup, or delete/recreate the cell.
    But if it is still not working, then quit trying and focus on NSS !!

    regards
    pix

    #41994 Reply
    South africa
    Guest

    Thanks Pix,I.m working on the BSS Side .I will try to do just that.

    Just one more consern about this Issue of TSC actualy i also want to re-plan my TSC.
    Will it be a good idea to make co-located cells the different TSC?

    Thanks in advance.

    #41995 Reply
    pix
    Guest

    hi

    TSC should be equal to BSIC.
    so plan your BSIC, and then just apply this rule…

    BSIC can be the same, as long as the BCCH frequency is different. It doesn’t matter if you’re colocated or not.

    regards
    pix

    #41996 Reply
    makarand
    Guest

    What will be the effect when surrounding cells having same BCC ?

    #41997 Reply
    pix
    Guest

    no effect, except if they are using one or many identical frequencies (be it BCCH or non-BCCH)

    #41998 Reply
    Vicky
    Guest

    Working For ZTE system. Is it true to use the TSC=BCC on each TRX or it may be TRX Wise, i.e.
    1st TRX TSC= BCC;
    2nd TRX TSC= BCC+1;
    3rd TRX TSC= BCC+2;
    4th TRX TSC= BCC+3;

    pls suggest.

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