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

Wed May 5 10:01:40 UTC 2021

Hey,

all of what your doing seems correct, besides the UE using USB2 for the
USRP and thus causing many RF issues and yield RLF.

See:
[INFO] [B200] Operating over USB 2.

Make sure to use USB3

Thanks
Andre

On 5/5/21 11:44, 張柏毅 wrote:
> 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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