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3 site on same E1 with DAP

Viewing 15 posts - 1 through 15 (of 15 total)
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  • #65420 Reply
    jack
    Guest

    Hi all.
    i have one question.
    my vendor is nokia.
    i have 3 METROSITE on same E1(ET).
    i test this 2 senario for activating EDGE on these 3 sites:

    senario 1:i create 1 EDAP with 6 timeslot one same E1 And attach whole 3 sites to this EDAP.then i activate EGPRS on sectors of 3 sites(EGENA=Y),after one day i check KPI and i understand that only one site have GPRS/EGPRS traffic and other 2 sites doesnot have any GPRS/EGPRS traffic,after i disable EGPRS in this 2 sites(GPRS still active) these 2 sites captures GPRS traffic.

    senario 2:i create 3 EDAP and each of them with 2 timeslot one same E1 and attach any of 3 sites into its EDAP.then i activate EGPRS on sectors of 3 sites(EGENA=Y),also in this case only one of 3 sites have GPRS/EGPRS traffic and and other 2 sites doesnot have any GPRS/EGPRS traffic.

    i think that in nokia we cannot activate EGPRS on E1 that contains multiple sites(chained sites),CMIIW

    i cannot activate EGPRS on 3 sites at the same time,i can activate EGPRS on only one of them and the other site only can support GPRS!

    any solution?

    #65421 Reply
    Bijoy
    Guest

    Hi Jack
    Try this
    Create 3 DAP ID’s on this E1 & reserve independent TSL on it.
    Say
    DAP1=20,21
    DAP2=22,23
    DAP3=24,25

    Br\\
    Bijoy

    #65422 Reply
    jack
    Guest

    hi Bijoy
    thing that you say is senario 2.
    i try that before.
    two of 3 sites doesnot support EDGE and GPRS.
    i think that something is wrong with SMCH(syncronization Master channel).
    please give me another solution.

    #65423 Reply
    Bijoy
    Guest

    Jack
    Is there any sort of alarm on those sites where EGPRS is not working?

    Br\\
    Bijoy

    #65424 Reply
    jack
    Guest

    hi Bijoy.
    in case that 3 sites share 1 EDAP
    i have only in 1 site EDGE and GPRS support and in other 2 sites i have no EDGE and GPRS traffic.i faund this by checking KPI,from KPI i have no DL TBF assighnment and i have no DL TBF traffic at all.just a few UL TBF stablished in EDGE and GPRS mode and i have no DL traffic for them.actually i have a few UL traffic for both of EDGE and GPRS but i havenot any DL traffic for them.
    meanwile,for other 2 sites i have alarm 7725(traffic channel activation failure for PDTCH channel.

    when i split 1 EDAP to 3 EDAP,same result occure,but in this situation i have no 7725,actually in this case BSC can activate PDTCH for all of 3 sites,but KPI indicate that i have no DL TBF(DL traffic) at all.

    #65425 Reply
    Bijoy
    Guest

    Jack
    Plz check the following
    All the TRX’s connected to DAP must be connected to the same BCSU/PCU.
    Also,RAC & NSEI should also be same.

    Br\\
    Bijoy

    #65426 Reply
    jack
    Guest

    ok.
    i will check it tomarrow and reply to you the result.

    #65427 Reply
    jack
    Guest

    hi bijoy.
    i check that very soon!
    All the TRX’s connected to EDAPs
    connected to same NSEI(PCU).
    actually all 3 EDAP have Same BCSU and PCU and NSEI and PSEI!
    the only thing that is different b/w TRXs that connected to EDAPs is LAPD of these TRXs that these LAPDs arenot on same BCSU!do you think that also in this case i have must same BCSU?

    #65428 Reply
    jack
    Guest

    i am wating for your reply,Bijoy

    #65429 Reply
    Bijoy
    Guest

    Jack
    Yes,you can.& also perform a BCSU switchover activity in this BSC tonight if things are still the same.In the meantime,let me check if there is any pronto on this case.

    Can you tell me the BSC & BTS SW version.

    Br\\
    Bijoy

    #65430 Reply
    jack
    Guest

    i dont undersand BCSU switchover term.
    do you mean i make BCSU switchover in all BCSU of this BSC or just make a BCSU switchover on BCSU that carry EDAP and Gprs Of these sites(all EDAP and GPRS of these 3 sites is on BCSU=6).
    do you mean i make BCSU=6 in SP-EX state and then BCSU switchover can happen.
    my BSC software is S12.
    i will tell you tommorrow about BTS version.

    #65431 Reply
    Bold
    Guest

    I want know about some result.
    how to calculate erlang of BSC, MSC in case of BSC and MSC are to become peak traffic.

    #65432 Reply
    care11
    Guest

    Check the sites if all TRXs are EDGE capable.DAP should be defined to TRX.Also GENA-EGENA-CS34 should be enable Y state.

    Add those TRXs(that doesnt have EGPRS traffic) to DAP .

    Just a share…ope it helps.=)

    #65433 Reply
    jack
    Guest

    please someone help me.
    i do every solution that you suggest,but still same result.

    #65434 Reply
    care11
    Guest

    well jack,we need data on this=) logs,config etc.=)

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Reply To: 3 site on same E1 with DAP
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