[srslte-users] M_TMSI keeps fail to attach when UE connects to EPC

[Andre Puschmann]

On 18/4/20 12:27, HONG-SIOU Wei wrote:
> Hi all,
> 
> When I try to connect to EPC, I always get stuck in *_InitialUEMessage, Attach request, PDN connectivity request_*.
> 
> I check the mme_gid,mme_code to help me solve this problem but M_TMSI still cannot determine whether it is correct.
> 
> How can I confirm that the M_TMSI transmitted by ENB is correct in EPC?

You have to consult the EPC logs for this. On the UE you can look at the
PCAP to see if it's transmitting what it is supposed to do.

Cheers
Andre

> 
> srsUE :
> 
> Reading configuration file ue.conf...
> 
> Built in Release mode using commit 0e89fa9 on branch master.
> 
> Opening 1 RF devices with 1 RF channels...
> [INFO] [UHD] linux; GNU C++ version 5.4.0 20160609; Boost_105800;
> UHD_3.14.0.0-release
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
> Opening USRP with args: type=b200,master_clock_rate=23.04e6
> [INFO] [B200] Detected Device: B210
> [INFO] [B200] Operating over USB 3.
> [INFO] [B200] Initialize CODEC control...
> [INFO] [B200] Initialize Radio control...
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [B200] Asking for clock rate 23.040000 MHz...
> [INFO] [B200] Actually got clock rate 23.040000 MHz.
> Waiting PHY to initialize ... done!
> Attaching UE...
> Searching cell in DL EARFCN=3400, f_dl=2685.0 MHz, f_ul=2565.0 MHz
> .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-3.1 KHz
> Found PLMN:  Id=20893, TAC=1
> Random Access Transmission: seq=44, ra-rnti=0x2
> Random Access Complete.     c-rnti=0x46, ta=1
> RRC Connected
> Failed to Attach
> .
> Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-3.0 KHz
> Found PLMN:  Id=20893, TAC=1
> 
> Thanks,
> WEI,HONG-SIOU
> 
> 
> 
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