[srslte-users] srsepc and srsenb started correctly but the phone can not search the base station

Sun Jul 14 23:27:39 UTC 2019

Hi Wang,
in this case you should check the antenna and the environment noise. sdr output power is very low if your antenna do not support the band then the output signal will be even lower. so check the antenna band and you can try modify frequency band. the cellphone should be very close to the sdr antenna. and as i know b205mini TX and RX antenna port is very close, did you try to keep your tx and rx antenna away from each other? the distance of rx and tx should be at least 30cm.

www.zhixun-wireless.top<http://www.zhixun-wireless.top/>
provide SDR PA LNA duplexer

Best Regards

________________________________
From: srslte-users <srslte-users-bounces at lists.softwareradiosystems.com> on behalf of 王 奭 <iooi at live.com>
Sent: Saturday, July 13, 2019 17:31
To: srslte-users at lists.softwareradiosystems.com
Subject: [srslte-users] srsepc and srsenb started correctly but the phone can not search the base station

hello every,
I am trying to install srslte with Ettus USRP B205mini-i. Everything runs fine without errors, but the phone can not detect the eNB, and the interface of  srsGUI is static with a flat line and a single dot. I use the default configuration and try to modify some parameters, but the results have not changed.
Could someone help me, why srsGUI does not work properly and how to connect the phone to the base station?
The following are the output of the terminal and the log files.

Thanks for every help!
SWang

$ sudo srsepc

Built in Release mode using commit 5343b33 on branch master.

---  Software Radio Systems EPC  ---

Reading configuration file /home/seu/.config/srslte/epc.conf...
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, PLMN: 61712
S1 Setup Request - TAC 7, B-PLMN 0
S1 Setup Request - Paging DRX 2
Sending S1 Setup Response

$ sudo srsenb
linux; GNU C++ version 5.4.0 20160609; Boost_105800; UHD_003.009.003-0-gf0720677

Built in Release mode using commit 5343b33 on branch master.

---  Software Radio Systems LTE eNodeB  ---

Reading configuration file /home/seu/.config/srslte/enb.conf...
Opening USRP with args: type=b200,master_clock_rate=30.72e6
-- Detected Device: B205mini
-- Operating over USB 3.
-- Initialize CODEC control...
-- Initialize Radio control...
-- Performing register loopback test... pass
-- Performing CODEC loopback test... pass
-- Asking for clock rate 30.720000 MHz...
-- Actually got clock rate 30.720000 MHz.
-- Performing timer loopback test... pass
Setting frequency: DL=2625.0 Mhz, UL=2505.0 MHz
Starting plot for worker_id=0
Setting Sampling frequency 11.52 MHz

==== eNodeB started ===
Type <t> to view trace

enb.log

Built in Release mode using commit 5343b33 on branch master.
17:25:40.386556 [RF  ] [W] Underflow
17:25:40.435863 [RRC ] [W] Discarding PDU for removed rnti=0x0
Closing log

epc.log

Built in Release mode using commit 5343b33 on branch master.

---  Software Radio Systems EPC log ---

17:25:19.206773 [HSS ] [I] Opened DB file: /home/seu/.config/srslte/user_db.csv
17:25:19.206866 [HSS ] [I] HSS Initialized. DB file /home/seu/.config/srslte/user_db.csv, MCC: 61441, MNC: 65281
17:25:19.236162 [S1AP] [I] S1-MME Initializing
17:25:19.236207 [S1AP] [I] S1AP Initialized
17:25:19.236212 [MME GTPC] [I] Initializing MME S11 interface.
17:25:19.236221 [MME GTPC] [I] MME S11 Initialized
17:25:19.236229 [MME GTPC] [I] MME GTP-C Initialized
17:25:19.236235 [S1AP] [I] MME Initialized. MCC: 0xf001, MNC: 0xff01
17:25:19.236248 [GTPU] [I] TUN file descriptor = 6
17:25:19.236799 [GTPU] [I] Initialized SGi interface
17:25:19.236813 [GTPU] [I] S1-U socket = 7
17:25:19.236820 [GTPU] [I] S1-U IP = 127.0.1.100, Port = 2152
17:25:19.236822 [GTPU] [I] Initialized S1-U interface
17:25:19.236825 [GTPU] [I] SPGW GTP-U Initialized.
17:25:19.236830 [SPGW GTPC] [I] Initializing SPGW S11 interface.
17:25:19.236930 [SPGW GTPC] [I] SPGW S11 Initialized.
17:25:19.236936 [SPGW] [I] SP-GW Initialized.
17:25:19.238156 [GTPU] [W] IPv6 not supported yet.
17:25:23.233889 [GTPU] [W] IPv6 not supported yet.
17:25:29.390267 [S1AP] [I] Received S1AP msg. Size: 49
17:25:29.390335 [S1AP] [I] Received initiating PDU
17:25:29.390341 [S1AP] [I] Received S1 Setup Request.
17:25:29.390367 [S1AP] [I] S1 Setup Request - eNB Name: srsenb01, eNB id: 0x19b
17:25:29.390371 [S1AP] [I] S1 Setup Request - MCC:001, MNC:01, PLMN: 61712
17:25:29.390402 [S1AP] [I] S1 Setup Request - TAC 7, B-PLMN 0
17:25:29.390431 [S1AP] [I] Adding new eNB context. eNB ID 411
17:25:29.390789 [S1AP] [I] Sending S1 Setup Response
17:25:31.425799 [GTPU] [W] IPv6 not supported yet.
17:25:39.391348 [S1AP] [I] SCTP Association Shutdown. Association: 22
17:25:39.391374 [S1AP] [I] Deleting eNB context. eNB Id: 0x19b
17:25:41.961867 [HSS ] [I] Opened DB file: /home/seu/.config/srslte/user_db.csv
17:25:41.961976 [HSS ] [I] Deleting UE context in HSS. IMSI: 001010123456780
17:25:41.962005 [HSS ] [I] Deleting UE context in HSS. IMSI: 001010123456789
Closing log

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