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Paging failure

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  • #42635 Reply

    Hi all!

    We have problem of high rate of unsucceful paging in our GSM network. SDCCH load is within limits, MSC sends pagings when needed, but subcribers often don’t recieve them. Does anybody have any idea?

    #42636 Reply


    are u using combined channel configuration

    ie bcch+sdcch in ts0 …

    #42637 Reply


    Paging is on control channels (BCCH or CCCH). If you do not use combined BCCH you have 9 CCCH blocks (1 block = 1 paging message to 1..4 subscribers). Volume of paging is related to the Location area size. Check how many pagings you have per hour (140000 CCCH blocks per hour for MainBCCH); how many blocks you have reserved for access grant channel.
    Also check if you use IMSI or TMSI (2 TMSI = 1 IMSI)… and paging groups (multiframes between paging) smaller value -> earlier paging congestion.

    #42638 Reply

    Thank you for answers! Well, we began with dividing territory to smaller LAC…

    #42639 Reply
    Manoj Agarwal

    Hi I have very poor paging success rate in the netwok can any body tell propable reasons for low paging success rate.

    #42640 Reply

    Dear Boko,
    can u plz more explain the below mentioned case:
    If i am using 1 non combined BCCH(9 CCCH blocks) now how many blocks used for PCH and AGCH and paging group will be identified from “Paging multiframes”?

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