[srslte-users] NAS Authentication Failure with COTS UE & B210

Thu Jul 8 09:40:52 UTC 2021

Hey,

Can you share the logs of the enb and epc please?

Regards,
Justin
Justin Tallon

Senior Engineer

Software Radio Systems Ltd.
+353860670753
justin at srs.io
www.srs.io
Barcelona, Spain
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On Thu, Jul 8, 2021 at 11:37 AM So Randomem <sorandomem at gmail.com> wrote:

> Dear srsRAN Support Team,
>
> I am following the srsRAN official guideline, COTS UE Application Note (
> https://docs.srsran.com/en/latest/app_notes/source/cots_ue/source/index.html#cots-ue-application-note),
> in order to connect my phone (UE) to my PC (srsEPC & srsENB). However, it
> seems like my phone is failing to respond to the NAS Authentication request
> sent by MME as the log shows that srsEPC releases UE after sending the NAS
> Authentication request. Following is some information that might be useful
> for you to understand my setup.
>
> 1. UE / phone: LG X4 w/ a programmable sim card written with following
> parameters-ue1,mil,901700000020936,4933f9c5a83e5718c52e54066dc78dcf,opc,fc632f97bd249ce0d16ba79e6505d300,9000,000000000000,9,dynamic
>
> 2. srsENB: USRP B210 w/ four VERT 2450 antennas
> 3. srsEPC: PC w/ Ubuntu 20.04
>
> 4. log from srsEPC:
> Built in Release mode using commit 89f16eed2 on branch master.
>
>
> ---  Software Radio Systems EPC  ---
>
> Reading configuration file /root/.config/srsran/epc.conf...
> HSS Initialized.
> MME S11 Initialized
> MME GTP-C Initialized
> MME Initialized. MCC: 0xf901, MNC: 0xff70
> SPGW GTP-U Initialized.
> SPGW S11 Initialized.
> SP-GW Initialized.
> Received S1 Setup Request.
> S1 Setup Request - eNB Name: srsenb01, eNB id: 0x19b
> S1 Setup Request - MCC:901, MNC:70
> S1 Setup Request - TAC 7, B-PLMN 0x9f107
> S1 Setup Request - Paging DRX v128
> Sending S1 Setup Response
> Initial UE message: LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST
> Received Initial UE message -- Attach Request
> Attach request -- IMSI: 901700000020936
> Attach request -- eNB-UE S1AP Id: 1
> Attach request -- Attach type: 2
> Attach Request -- UE Network Capabilities EEA: 11100000
> Attach Request -- UE Network Capabilities EIA: 01100000
> Attach Request -- MS Network Capabilities Present: true
> PDN Connectivity Request -- EPS Bearer Identity requested: 0
> PDN Connectivity Request -- Procedure Transaction Id: 1
> PDN Connectivity Request -- ESM Information Transfer requested: false
> Downlink NAS: Sending Authentication Request
> Initial UE message: LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST
> Received Initial UE message -- Attach Request
> Attach request -- IMSI: 901700000020936
> Attach request -- eNB-UE S1AP Id: 2
> Attach request -- Attach type: 2
> Attach Request -- UE Network Capabilities EEA: 11100000
> Attach Request -- UE Network Capabilities EIA: 01100000
> Attach Request -- MS Network Capabilities Present: true
> PDN Connectivity Request -- EPS Bearer Identity requested: 0
> PDN Connectivity Request -- Procedure Transaction Id: 2
> PDN Connectivity Request -- ESM Information Transfer requested: false
> Attach Request -- Found previously attach UE.
> Downlink NAS: Sending Authentication Request
> ^CStopping ..
> Deleting eNB context. eNB Id: 0x19b
> Deleting UE EMM context. IMSI: 901700000020936
>
> 5. log from srsENB:
> ---  Software Radio Systems LTE eNodeB  ---
>
> Reading configuration file /root/.config/srsran/enb.conf...
> WARNING: cpu0 scaling governor is not set to performance mode. Realtime
> processing could be compromised. Consider setting it to performance mode
> before running the application.
>
> Built in Release mode using commit 89f16eed2 on branch master.
>
> Opening 1 channels in RF device=default with args=default
> [INFO] [UHD] linux; GNU C++ version 9.3.0; Boost_107100;
> UHD_3.15.0.0-release
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
> Opening USRP channels=1, args: type=b200,master_clock_rate=23.04e6
> [INFO] [UHD RF] RF UHD Generic instance constructed
> [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.
> Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz for cc_idx=0 nof_prb=50
>
> ==== eNodeB started ===
> Type <t> to view trace
> RACH:  tti=1131, cc=0, preamble=35, offset=1, temp_crnti=0x46
> RACH:  tti=671, cc=0, preamble=41, offset=1, temp_crnti=0x47
>
>
> Any insight would be greatly appreciated! If any of you had the same issue
> before, please let me know how you dealt with this problem. Thanks a lot in
> advance for your assistance.
>
> Best,
> So
>
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