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Imm. Assignment fail

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  • 8th October 2009 at 14:47 #59134
    ATTO
    Guest

    Hi Guys,

    I’m receiving too many Immediate assignment failure with TEMS Pocket while i’m in idle mode without attempting to make a call.

    Can anybody helps me understand why?

    Thanks in advance

    15th October 2009 at 20:51 #59135
    Lucas
    Guest

    Hi ATTO,

    Probably the failures are in location update procedure. The MS performs this procedure when it’s turned on/off, when it’s moving between location areas or by periodic registration.

    Maybe you are on a ping pong zone between two location areas?

    Regards,

    16th October 2009 at 13:15 #59136
    ATTO
    Guest

    Hi Lucas,

    I’ve been thinking about Location update. I’ll try further investigation to see if i’ll get LU attempt before the message ” Immediate assignment failure”.

    For ur information,the area where i’ve got the problem is only supported by one LAC, all surrounding cells are on the same LAC.

    Thanks.

    16th October 2009 at 20:34 #59137
    Pix
    Guest

    Atto,

    How amazing… it’s impossible that the MS listen to the AGCH channel if it didn’t initiate it with a Channel Request.

    (for info) Channel request is a layer 3 msg, you should see it just before the I.A. msg.

    What is the content of the I.A. message ?

    Can you check that the MS is in DRX mode while on the BCCH ? (discontinuous reception)

    19th October 2009 at 11:57 #59138
    ATTO
    Guest

    Hi Pix,

    This is the content :

    2009-10-15 12:35:02
    PLMN: xxx ( i think u understand why)
    LAC:8020 CI: 22
    T3126 timeout.
    BCCH ARFCN: 87
    BSIC: 50

    Even today , when i got the same msg. Just before i ‘ve got the msg “MM service Eq” . the content is “MM service = Registered in equivalent PLMN”

    Any idea??

    Other things: In the “time log 1.3” menu, i see : No service 00:00:13

    For the DRX,i don’t know how to check it. let me search and i’ll give u the details.

    Thanks

    19th October 2009 at 19:24 #59139
    Pix
    Guest

    This it the content of the message ?? It looks like the header only…

    MM Service Eqt…? I don’t know that.
    No Service -> MS was out of coverage.
    If it gets the network again, it will perform a location update (starting with a channel request).

    21st October 2009 at 07:51 #59140
    ATTO
    Guest

    Hi Pix,

    I gave you the content , not the header.

    Even near BTS antenna , i got this message.

    Thanks for ur help.

    22nd October 2009 at 07:39 #59141
    ATTO
    Guest

    Hi Pix, Lucas

    I just switch on TEMS pocket and got the same message 3 times after LAU procedures.

    Below are all the messages i’ve got in the log menu :

    1 : MM Service Unreg ; content = “MM service = Unregistered”
    2 : RR service GSM ; content = “Service on GSM cell”
    3 : LAU Attempt ; content = ” LAU type= IMSI Attach”
    4: LAU Success; content = “PLMN = x, LAC=y, CI=z, Previous LA=t”
    5 MM service Eq; cont = “PLMN,=x, LAC=y, CI=z; MM service =Registered in equivalent PLMN”
    6 Immediate Assign Failure; cont = “PLMN=x, LAC=y, CI=z, T3126 timeout, BCCH ARCFN= 92, BSIC = 50”

    From the previous post , i have never activate LAU attempt and succes in log menu.

    22nd October 2009 at 21:05 #59142
    pix
    Guest

    atto

    so let me be clear : you current problem is regarding the line 5 :

    MM service Eq; cont = “PLMN,=x, LAC=y, CI=z; MM service =Registered in equivalent PLMN”

    you don’t know what it means ?

    and don’t either, but i think i can find out in the 3GPP. I’ll try to have a look…

    cheers,
    pix

    6th August 2013 at 10:05 #59143
    ouchfa
    Guest

    Hi ATTO;

    Is it a VSAT Link?

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