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SDCCH/8 on BCCH TRX

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  • #66576 Reply
    alphachild
    Guest

    Hello all. Please what is best if you have 4 TRXs, with 4 SDCCH/8. Should all SDs be configured on the BCCH TRX? What is the benefit of this? What happens if this BCCH TRX go down or is unavailable will the SDs be shifted automatically?

    I work on ALCATEL EQUIPEMENT

    #66577 Reply
    pix
    Guest

    hi,

    if bcch trx goes down, then its logical configuration (all the 8 TS) are shifted to another TRX.
    So my recommendation is to have 2 SDCCH on the BCCH TRX, and then 1 SDCCH on 2 other TRXs.
    The last TRX will have no SDCCH, in order to favour it for PDCH Allocation (the idea is to have 8 consecutive TCH/PDCH on the same TRX)

    cheers
    pix

    #66578 Reply
    Optim
    Guest

    Hi PIx,

    Is there any Parameter (switch) to control this reconfiguration when BCCH TRx goes down? or its a default by standard?

    Thanks,

    #66579 Reply
    pix
    Guest

    hi,

    i think there is no parameter to tune this. What would you like to tune actually ? Because shifting the BCCH to a trx that’s “up” is definitely something you want enabled !

    regards
    pix

    #66580 Reply
    Optim
    Guest

    Hi Pix,

    Thanks mate.

    I don’t actually want to tune anything, but just wanted to know if this can be disabled by any parameter, so that one can have this in mind if in the event that logical channels don’t move to the other TRx somehow.

    regards,

    #66581 Reply
    pix
    Guest

    but if the bcch doesn’t shift to another trx, then the cell is down.
    That’s ugly.

    Are you thinking about another scenario ?

    #66582 Reply
    Ali
    Guest

    Hi,

    Kindly let me know if this is necessary to not assign any SD in last TRX ?? and what about the Packet Data.. how we normally assign it to BCCH and Hopping TRX in 4/4/4 configuration ?? please help

    #66583 Reply
    Lemaure
    Guest

    Hi!

    to avoid having CCH failures or drops it’s recommanded to have your SD channels on the BCCH assuming that you have a very clean BCCH plan

    #66584 Reply
    JAGGU
    Guest

    hI ALL WHAT IS THE BEST ASSIGNMENT OF bcch AND SDCCH IN 3:3:3 CONFIGURATION

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Reply To: SDCCH/8 on BCCH TRX
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