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Abis Optimization

Viewing 15 posts - 1 through 15 (of 15 total)
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  • 4th May 2011 at 04:59 #66266
    sds
    Guest

    in our network, we were using only 1 E1 for even upto 24 TRX using IPoE1.PS performance is very poor in such sites.

    Now though there are 2E1s, PS performance is still poor. Do you have any idea?

    Vendor is ZTE.

    4th May 2011 at 09:14 #66267
    Smart
    Guest

    Were do u see the PS performance?

    5th May 2011 at 07:49 #66268
    Smart
    Guest

    You should check how many idle timeslots you have.
    You can add as many E1 as you want but without configuring E1 channels they are worthless. Check your BSC and ask the BSC engineer to add 45 ore more idle timeslots

    5th May 2011 at 14:51 #66269
    Pix
    Guest

    Hi sds,

    yes, you should explicitely add more Abis-timeslots for EGPRS traffic. In ALU, we call them “extra timeslots”.

    Regards
    pix

    6th May 2011 at 09:14 #66270
    sds
    Guest

    where to configure these extra 45 idle timeslots,

    6th May 2011 at 09:24 #66271
    Smart
    Guest

    I’m sorry I dont know ZTE equipment. Ask your BSC engineer, he should know that.

    6th May 2011 at 20:41 #66272
    Tanuj
    Guest

    you must be using ZTE iBSC, in iBSC although the allocation is dynamic so we can configure many PDTCH without getting errors unlike in ZTE V2 where we used to get BIECOM errors, but this won’t increase the throughput as the bandwidth of the E1 is still the bottleneck and in iBSC there is no option to give TS on E1 for the configured PDTCH, so calculate the available idle TS left on E1 and configure that many PD channels.

    Regards

    10th May 2011 at 12:03 #66273
    Zabi
    Guest

    Hi SDS

    check UPPB DSP distribution

    it should be not more then 40 PDTCH channel when activite EDGE and for GPRS it should be not more then 80 PDTCH in one DSP

    14th April 2013 at 16:43 #66274
    XiaoMu
    Guest

    in ZTE SDR, 24TRX —> 1E1 (IPoE1) is true only when we consider voice, without any GPRS or EDGE PDCH ( I assume ur GUP/UPPB capacity in iBSC well dimensioned)….As I rememebr for one GPRS PDCH —> 16Kbps in Abis and EDGE PDCH —> 32Kbps in Abis…these PDCH must be considererd aside from Voice…so in this case 1E1 will give far less then 24TRX, if not more then 4PDCH/Cell just consider 22TRX/E1 or even less…..Hope this helps

    14th April 2013 at 19:29 #66275
    pix
    Guest

    Hi Xiao,

    Actually the PDCH is not statistically mapped on an Abis capacity.

    So if the voice is not too high on the Abis, the remaining capacity will be used by the GPRS, in order to give higher radio throughputs.

    However, if the voice is highly loaded, in this case the GPRS will be strongly limited, as you stated.

    Regards
    pix

    15th April 2013 at 16:01 #66276
    XiaoMu
    Guest

    Hi Pix
    right….even though PDCH not statically mapped but we still estemate the total needed capacity in Abis the way I described….I’m aware of ur point that for IPoE1 we can’t even know which TCH/PDCH going on which TSL(E1)….but I gave the way ZTE dimension globally the Abis ….I was expecting u tell me that ur PDCH r mostly dynamic in that case its hard to estemate the transmission…but still u can try to afford the max u get from estimation

    19th April 2013 at 21:25 #66277
    pix
    Guest

    hi,

    Oh, sure, an estimation is always necessary, to know what to expect from a given capacity. I was just building on your previous post, not contradicting 🙂 Sorry if I make a wrong impression.

    Regards
    pix

    20th April 2013 at 15:58 #66278
    XiaoMu
    Guest

    Hi Pix

    No offense my dear…I only wanted to to heat the point and make it clear as much as I could….tnx

    26th September 2013 at 22:49 #66279
    Ram
    Guest

    Hi,
    what is is the abbreviation of dsp,uppb,usf and please explain briefly about DSP n no of dsp count

    26th November 2013 at 22:56 #66280
    NPOC
    Guest

    Hi,
    what is the abbreviation of FNI

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