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periodic location update

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #55292 Reply
    RL
    Guest

    Dear all,

    Could you please share for the periodic location update period that we should set in the network.

    In my network we set 10 hour. Is it too much???

    Thank you very much.

    #55293 Reply
    riz
    Guest

    hi RL,

    yeah i think 10 hour is very high, in our network its 6 hours which is a standard value as far as networks in our country are concerned 🙂

    #55294 Reply
    Pix
    Guest

    Hello,

    The value of T3212 sets the duration between two periodic location update. Typical value is 3 or 4 hours.
    If too short, then resources are occupied too much with signalling (SDCCH, BTS processor, MSC processor, VLR, etc.)

    If too long, then it can happen that MS are not accessible anymore (battery died, for example) but the MSC still believe they can be paged.

    The drawbacks of a longer value are rather inconsequential … It looks like it’s better to have a value too long than too short 🙂

    Now, be careful than the implicit detach timer “t” set in the MSC/VLR is longer than the T3212. Because if it’s shorter, then it means that “t” expires before T3212: the IMSI is detached by the VLR, but the MS is not aware of that…

    #55295 Reply
    hihi
    Guest

    where is the timer?in VLR OR
    MS

    #55296 Reply
    Bijoy
    Guest

    T3212 is a cell Timer.

    Br\\
    Bijoy

    #55297 Reply
    Tanuj
    Guest

    typically we are using 4 hours as std. value in our nw, the value is gioven as 40 (1=6 minutes so 40*6=240 mins.

    #55298 Reply
    AYAT
    Guest

    Pix

    is (‘t’ detach timer

    the the timer that network will purge the sub

    in our network T3212=2.9 H

    and network will delete the subscriber after 24 H

    is that time thesame for (‘t’ detach timer ??

    #55299 Reply
    ayat
    Guest

    hi pix

    1. T3213(periodical timer in Radio) = 174min
    2. t(periodical timer in VLR) = 240min (large than T3213, so it is available if the T3213 is not successful)
    3. purge timer = 24Hours

    but ,we have a problem with high nmber of absent subscriber

    #55300 Reply
    ffflyer
    Guest

    T3212 value varies significantly between networks, I’ve seen values as long as 12 hours and as short as 2 hours. It really depends on a strategy, LA shapes and sizes and signaling transport capacity. Have in mind that short T3213 value also affect battery life time for MS, especially for low consuming customers.

    #55301 Reply
    SKCG
    Guest

    I think 4 hours is fine at most cases.

    #55302 Reply
    AK
    Guest

    I guess 3 hrs for T3212 is widely accepted in the world. But it depends on various parameters.

    #55303 Reply
    Ayat
    Guest

    Hi pix
    Thanks for your support
    but i am afraid i did not umderstand why do we redude the VLR time (purge time)??
    could you explain
    boz as i said we have high map error absent sb.

    i think it will increase this error

    #55304 Reply
    pix
    Guest

    Ayat,

    you said:
    ———————–

    1. T3213(periodical timer in Radio) = 174min
    2. t(periodical timer in VLR) = 240min (large than T3213, so it is available if the T3213 is not successful)
    3. purge timer = 24Hours

    ————————

    the t(periodical timer in VLR) is at a good value, so IMO it means that the MS which are no more “available” are quickly marked as “detached” by the VLR.
    So my previous recommendation is actually already done in your network 🙂
    the purge timer would not influence your KPI (afaik).

    i can’t help more…
    pix

    #71214 Reply
    Ahmed
    Guest

    the Timer was set to one hour in our NW so i have changed it to 4 Hours on 2G and 3G w, what are the expected KPI’s that could improve , any idea ??

Viewing 14 posts - 1 through 14 (of 14 total)
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