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