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Half/Full Rate TCH

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  • #66808 Reply
    N.Selvakumar
    Guest

    Can anyone tell, In what basis n/w Half/Full rate TCH to MS in IMMEDIATE ASSIGNMENT COMMAND

    Regards,
    selva n

    #66809 Reply
    Pix
    Guest

    hi,

    it is only based on what the BSC decides to do. and the BSC itself bases its decision on the outputs from the TCH allocation algorithm.
    Usually, under a specific load threshol, the TCH is allocated in FR. Above this threhsold, the TCH is allocated in HR.
    The load = the TCH load in that cell.

    regards
    pix

    #66810 Reply
    N.Selvakumar
    Guest

    Hi Pix,

    What is the need of Network setting “IMSI attach flag” (0 or 1) in system information.

    I know if the IMSI attach flag is set to 1, MS will do IMSI attach or else It will do location update.

    But what condition Network will set it to 1 or 0.

    Thanks & Regards,
    selva n

    #66811 Reply
    pritam
    Guest

    hi pix,other than quality wat disadvantage we have with half rate?

    #66812 Reply
    telecominfo
    Guest

    There is no disadvantage in using hald rate…infact if you activate AMR in the network than half rate call will as capable as Mon-AMR full rate.

    #66813 Reply
    Pix
    Guest

    hi,

    impacts other than voice quality:

    – increase of traffic on AterMux and A interfaces
    – increase of traffic load in the BSC (might impact the BSC dimensioning)
    – need to tune HR and AMR-R thresholds
    – need to buy HR licenses in order to declare TRXs as HR-capable (same goes for AMR-HR)

    Those are not disadvantages… just “constraints”.

    Cheers,
    pix

Viewing 6 posts - 1 through 6 (of 6 total)
Reply To: Half/Full Rate TCH
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