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NSEI and site GPRS Dimensioning ..

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  • 4th December 2013 at 06:13 #69378
    Pritam
    Guest

    Hi PIX & Bijoy…
    Can u please share me how many site we can attach to one nesi(we are using 1 logical pcu2_D).Here we have to config one site with max 9 number of GTRX and EDAP for 3 channel.CDED 17%,CDEF 34%,CMAX 100%.NSEI bandwidth 640 kbps.Please teach for the calculation detail.

    4th December 2013 at 18:52 #69379
    RNO
    Guest

    as you know that PCU2_d can handle 256 channels (16kbps) the utilization should be 70% that means 180 channels so your calculation as:
    =no of sites *no. of cells *CDEF*(channels support GPRS in TRXs)+EDAP channels (16kbps)

    for example in your case
    S3/3/3 :all TRXs enabled GPRS and channels =3*8-BCCH-2SDCCH=24-1-2=21
    so we have 21 channels in TRXs enabled GPRS per cell and we have 3 EDAP timeslots (64Kbps)=4 (16kbps)*3=12

    so per site
    21*.34*3+12=33
    1 pcu can handle sites
    =180/33=5 sites

    NOTE:i recommend to increase EDAP to 6 timesloats

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