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rach rejection

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #59729 Reply
    zzz
    Guest

    hi.. need your help on how to resolve high rach rejection. what are the parameters(nokia) involved? tnx.

    #59730 Reply
    Ayat
    Guest

    hellooooooooooooooo

    you have to analysis , why reject different reasons for rach reject ,

    we face the same problem in our network

    some cells have small TA , so tru to expand the converage of these cells and moniter it and the neighber cells from the traffic and congestion .

    #59731 Reply
    zzz
    Guest

    thanks ayat for sharing ur experience.. but can you explain how did expanding your coverage solve the high rach rejection?

    #59732 Reply
    Ayat
    Guest

    in the configuration system

    there are some paramters , related to TA one of them TA allowed ,we use this parmter to control in cell coverage .

    TA range from 0 to 63
    0.67 km to 36 km

    if Cell TA =5 ,that means this cell will reject all access request after TA =5

    so we can test this cell and expand TA=63 , we expect high congestion , so we have to mintor this cell

    in our network , after test we found some cells not congested .

    #59733 Reply
    Bijoy
    Guest

    ZZZ
    If the RACH rejection is high only for a few cells,you can take care of High LU,excessive TA,UL interfernce etc etc.

    If it is high for entire BSC(all cells),you need to check the BSC RACH Load,processor card loads,SW incompatibilty etc.

    Br\\
    Bijoy

    #59734 Reply
    zzz
    Guest

    thanks bijoy & ayat..

Viewing 6 posts - 1 through 6 (of 6 total)
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