[srslte-users] srsUE show "Waring: Detect Radio link failure" after RRC Connect

Wed May 5 09:44:28 UTC 2021

Sorry I'm not sure that whether this is the correct approach to ask or not.
I have problem of "Waring: Detect Radio link failure", and I have checked
other people's message, still can't solve the problem.

I'm using two USRP B210 to run srsLTE. All of them are Ubuntu 20.04, UHD
3.15.0.0, and srsLTE on the master branch. After srsepc and srsenb work
normally, srsue will keep connect/disconnect with srsenb.

It's a config problem or hardware issue(antenna, board)?
Thanks for any help that provided.

Under is the log I got:
---  Software Radio Systems EPC  ---

Reading configuration file /home/ubuntu/srsLTE/srsepc/epc.conf.example...
HSS Initialized.
MME S11 Initialized
MME GTP-C Initialized
MME Initialized. MCC: 0xf001, MNC: 0xff01
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:001, MNC:01
S1 Setup Request - TAC 7, B-PLMN 0xf110
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 -- M-TMSI: 0x18da1cca
Attach request -- eNB-UE S1AP Id: 1
Attach request -- Attach type: 1
Attach Request -- UE Network Capabilities EEA: 11110000
Attach Request -- UE Network Capabilities EIA: 01110000
Attach Request -- MS Network Capabilities Present: false
PDN Connectivity Request -- EPS Bearer Identity requested: 0
PDN Connectivity Request -- Procedure Transaction Id: 1
PDN Connectivity Request -- ESM Information Transfer requested: false
Initial UE message: LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST
Received Initial UE message -- Attach Request
Attach request -- M-TMSI: 0x18da1cca
Attach request -- eNB-UE S1AP Id: 2
Attach request -- Attach type: 1
Attach Request -- UE Network Capabilities EEA: 11110000
Attach Request -- UE Network Capabilities EIA: 01110000
Attach Request -- MS Network Capabilities Present: false
PDN Connectivity Request -- EPS Bearer Identity requested: 0
PDN Connectivity Request -- Procedure Transaction Id: 1
PDN Connectivity Request -- ESM Information Transfer requested: false
UL NAS: Received Identity Response
ID Response -- IMSI: 001010123456789
Downlink NAS: Sent Authentication Request
UL NAS: Received Authentication Response
Authentication Response -- IMSI 001010123456789
UE Authentication Accepted.
Generating KeNB with UL NAS COUNT: 0
Downlink NAS: Sending NAS Security Mode Command.
UL NAS: Received Security Mode Complete
Security Mode Command Complete -- IMSI: 001010123456789
Getting subscription information -- QCI 7
Sending Create Session Request.
Creating Session Response -- IMSI: 1010123456789
Creating Session Response -- MME control TEID: 1
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_CREATE_SESSION_REQUEST
SPGW: Allocated Ctrl TEID 1
SPGW: Allocated User TEID 1
SPGW: Allocate UE IP 172.16.0.2
Received Create Session Response
Create Session Response -- SPGW control TEID 1
Create Session Response -- SPGW S1-U Address: 127.0.1.100
SPGW Allocated IP 172.16.0.2 to IMSI 001010123456789
Adding attach accept to Initial Context Setup Request
Sent Initial Context Setup Request. E-RAB id 5
Received Initial Context Setup Response
E-RAB Context Setup. E-RAB id 5
E-RAB Context -- eNB TEID 0x1; eNB GTP-U Address 127.0.1.1
UL NAS: Received Attach Complete
Unpacked Attached Complete Message. IMSI 1010123456789
Unpacked Activate Default EPS Bearer message. EPS Bearer id 5
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_MODIFY_BEARER_REQUEST
Sending EMM Information
UL NAS: Detach Request
Detach request -- IMSI 001010123456789
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_DELETE_SESSION_REQUEST
Received UE Context Release Complete. MME-UE S1AP Id 2
UE Context Release Completed.
Stopping ..
Deleting eNB context. eNB Id: 0x19b
Deleting UE EMM context. IMSI: 001010123456789

Built in Release mode using commit 45486b6e2 on branch master.

/home/ubuntu/srsLTE/srsenb/src/enb_cfg_parser.cc.890: Force DL EARFCN for
cell PCI=1 to 3400

Opening 1 channels in RF device=UHD with args=default
[INFO] [UHD] linux; GNU C++ version 9.2.1 20200228; Boost_107100;
UHD_3.15.0.0-2build5
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP channels=1, 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.
Setting frequency: DL=2685.0 Mhz, UL=2565.0 MHz for cc_idx=0

==== eNodeB started ===
Type <t> to view trace
RACH:  tti=4021, cc=0, preamble=49, offset=3, temp_crnti=0x46
RACH:  tti=6741, cc=0, preamble=0, offset=3, temp_crnti=0x47
User 0x47 connected
RACH:  tti=7621, cc=0, preamble=17, offset=3, temp_crnti=0x48
RACH:  tti=7621, cc=0, preamble=20, offset=9, temp_crnti=0x49
SCHED: Could not transmit RAR within the window (RA=7621,
Window=[7624..7634], RAR=7636)
Disconnecting rnti=0x47.
Disconnecting rnti=0x49.
User 0x48 connected
RACH:  tti=8151, cc=0, preamble=33, offset=3, temp_crnti=0x4a
RACH:  tti=8151, cc=0, preamble=36, offset=9, temp_crnti=0x4b
Disconnecting rnti=0x48.
User 0x4a connected
Disconnecting rnti=0x4b.
Disconnecting rnti=0x4a.
Stopping ..
SCTP Association Shutdown. Association: 0
connect(): Connection refused
Failed to initiate SCTP socket. Attempting reconnection in 10 seconds
---  exiting  ---

---------------srsUE--------------------
Built in Release mode using commit 45486b6e2 on branch master.

Opening 1 channels in RF device=UHD with args=default
[INFO] [UHD] linux; GNU C++ version 9.2.1 20200304; Boost_107100;
UHD_3.15.0.0-2build5
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP channels=1, args: type=b200,master_clock_rate=23.04e6
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 2.
[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...
.
Found Cell:  Mode=FDD, PCI=1, PRB=15, Ports=1, CFO=-2.1 KHz
Found PLMN:  Id=00101, TAC=7
Random Access Transmission: seq=49, ra-rnti=0x2
Random Access Complete.     c-rnti=0x46, ta=3
RRC Connected
Warning: Detected Radio-Link Failure
RF status: O=0, U=1, L=0
RRC IDLE
RF status: O=0, U=4, L=2
RF status: O=0, U=34, L=35
.
Found Cell:  Mode=FDD, PCI=1, PRB=15, Ports=1, CFO=-2.2 KHz
Found PLMN:  Id=00101, TAC=7
Random Access Transmission: seq=0, ra-rnti=0x2
Random Access Complete.     c-rnti=0x47, ta=3
RRC Connected
Network attach successful. IP: 172.16.0.2
Software Radio Systems LTE (srsLTE) 5/5/2021 9:24:20 TZ:0
RF status: O=0, U=4, L=0
RF status: O=0, U=3, L=6
RF status: O=0, U=2, L=7
Warning: Detected Radio-Link Failure
RRC Connection Reestablishment to PCI=1, EARFCN=3400 (Cause: "otherFailure")
Random Access Transmission: seq=17, ra-rnti=0x2
Random Access Complete.     c-rnti=0x48, ta=3
Reestablishment OK
RRC Connected
Warning: Detected Radio-Link Failure
RF status: O=0, U=2, L=3
RRC Connection Reestablishment to PCI=1, EARFCN=3400 (Cause: "otherFailure")
Random Access Transmission: seq=33, ra-rnti=0x2
Random Access Complete.     c-rnti=0x4a, ta=3
Reestablishment OK
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