Problem with SGSN Location Update Reject during UE attach

Lam Ngoc Tuan tuanln at vnpt-technology.vn
Tue Oct 16 03:50:33 UTC 2018


Dear all

 

We are facing the following problem and hope you can help us:

-          We use OSMO as UMTS core emulation, working with our real NodeB

-          During UE attach procedure we see from SGSN "Location Update
Reject"

and afterthat UE is released.

-          We do the comparison test with real UMTS core and our real NodeB,
here 

it works properly, UE can attach successful.

 

We assume there is some Osmo configuration problem but we have not 

found the root cause, we very appreciate if you can take a look and give us
some advice.

 

Here is the current message flow of UE attach

 

     10.2.9.200    10.2.9.139    RANAP    170    (RUA) InitialUE-Message
(DTAP) (MM) Location Updating Request 

     10.2.9.139    10.2.9.200    RANAP    158    SACK (RUA) DirectTransfer
(DTAP) (MM) Authentication Request 

     10.2.9.200    10.2.9.139    RANAP    222    SACK (RUA)
InitialUE-Message (DTAP) (GMM) Attach Request 

     10.2.9.139    10.2.9.200    RANAP    122    SACK (RUA) DirectTransfer
(DTAP) (GMM) Identity Request 

     10.2.9.200    10.2.9.139    RANAP    118    (RUA) DirectTransfer (DTAP)
(MM) Authentication Failure 

     10.2.9.139    10.2.9.200    RANAP    158    SACK (RUA) DirectTransfer
(DTAP) (MM) Authentication Request 

     10.2.9.200    10.2.9.139    RANAP    154    SACK (RUA) DirectTransfer
(DTAP) (GMM) Identity Response 

     10.2.9.139    10.2.9.200    RANAP    162    SACK (RUA) DirectTransfer
(DTAP) (GMM) Authentication and Ciphering Req 

     10.2.9.200    10.2.9.139    RANAP    110    (RUA) DirectTransfer (DTAP)
(MM) Authentication Response 

     10.2.9.139    10.2.9.200    RANAP    138    SACK (RUA)
SecurityModeCommand 

     10.2.9.200    10.2.9.139    RANAP    98     (RUA) SecurityModeComplete 

     10.2.9.139    10.2.9.200    RANAP    122    SACK (RUA) CommonID 

     10.2.9.200    10.2.9.139    RANAP    166    SACK (RUA) DirectTransfer
(DTAP) (GMM) Authentication and Ciphering Resp 

     10.2.9.139    10.2.9.200    RANAP    134    SACK (RUA) DirectTransfer
(DTAP) (MM) Location Updating Accept 

     10.2.9.139    10.2.9.200    RANAP    122    (RUA) SecurityModeCommand 

-->  10.2.9.139    10.2.9.200    RANAP    106    (RUA) DirectTransfer (DTAP)
(MM) Location Updating Reject 

     10.2.9.139    10.2.9.200    RANAP    102    (RUA) Iu-ReleaseCommand 

     10.2.9.200    10.2.9.139    RANAP    114    SACK (RUA)
Iu-ReleaseComplete 

     10.2.9.200    10.2.9.139    RANAP    102    (RUA) SecurityModeReject 

     10.2.9.200    10.2.9.139    RANAP    102    (RUA) Iu-ReleaseRequest 

     10.2.9.139    10.2.9.200    RANAP    118    SACK (RUA)
Iu-ReleaseCommand 

                      10.2.9.200    10.2.9.139    RANAP    114    SACK (RUA)
Iu-ReleaseComplete

 

Thanks and regards

Tuan Lam

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