[srslte-users] srsUE unable to connect to srsENB

[Raghav Rathi]

Hello everyone,

I am trying to run srsLTE but for some reason the UE is unable to connect to the eNB. It seems like UE is able to fine the cell but there is not exchange of PRACH between them. Can someone please help me with this?

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sudo srsenb

Built in Release mode using commit d045213fb on branch HEAD.

---  Software Radio Systems LTE eNodeB  ---

Reading configuration file /etc/srslte/enb.conf...
Opening 1 RF devices with 1 RF channels...
[INFO] [UHD] linux; GNU C++ version 7.3.0; Boost_106501; UHD_3.15.0.0-2ubuntu1emulab1
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP with args: type=x300,master_clock_rate=184.32e6
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [X300] Radio 1x clock: 184.32 MHz
[INFO] [GPS] No GPSDO found
[INFO] [0/DmaFIFO_0] Initializing block control (NOC ID: 0xF1F0D00000000000)
[INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1304 MB/s)
[INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1316 MB/s)
[INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000000001)
[INFO] [0/Radio_1] Initializing block control (NOC ID: 0x12AD100000000001)
[INFO] [0/DDC_0] Initializing block control (NOC ID: 0xDDC0000000000000)
[INFO] [0/DDC_1] Initializing block control (NOC ID: 0xDDC0000000000000)
[INFO] [0/DUC_0] Initializing block control (NOC ID: 0xD0C0000000000000)
[INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000)
Setting frequency: DL=2625.0 Mhz, UL=2505.0 MHz
Setting Sampling frequency 5.76 MHz

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

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sudo srsue
Reading configuration file /etc/srslte/ue.conf...

Built in Release mode using commit d045213fb on branch HEAD.

Opening 1 RF devices with 1 RF channels...
[INFO] [UHD] linux; GNU C++ version 7.3.0; Boost_106501; UHD_3.15.0.0-2ubuntu1emulab1
[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=2800, f_dl=2625.0 MHz, f_ul=2505.0 MHz
.
Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-3.5 KHz
RF status: O=1, U=0, L=0
......
.
Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-4.6 KHz
.
..
.
.
Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-1.2 KHz
.
Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-2.1 KHz
....
Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-2.9 KHz
.
Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-3.4 KHz

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I even tried to run "./lib/examples/pdsch_ue -f <freq>” as mentioned in the thread "http://www.softwareradiosystems.com/pipermail/srslte-users/2019-June/002680.html”

Here is the output for it

srslte/build$ ./lib/examples/pdsch_ue -f 2625000000
Opening RF device with 1 RX antennas...
[INFO] [UHD] linux; GNU C++ version 7.3.0; Boost_106501; UHD_3.15.0.0-2ubuntu1emulab1
[INFO] [LOGGING] Fastpath logging disabled at runtime.
[INFO] [B200] Loading firmware image: /usr/share/uhd/images/usrp_b200_fw.hex...
Opening USRP with args: type=b200,master_clock_rate=23.04e6
[INFO] [B200] Detected Device: B210
[INFO] [B200] Loading FPGA image: /usr/share/uhd/images/usrp_b210_fpga.bin...
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Detecting internal GPSDO.... 
[INFO] [GPS] No GPSDO found
[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.
Starting AGC thread...
Tunning receiver to 2625.000 MHz
Searching for cell...
 Found Cell_id:   0 FDD, CP: Normal  , DetectRatio= 0% PSR=0.00, Power=-inf dBm
*Found Cell_id:   1 FDD, CP: Normal  , DetectRatio=100% PSR=3.00, Power=-42.1 dBm
 Found Cell_id:   0 FDD, CP: Normal  , DetectRatio= 0% PSR=0.00, Power=-inf dBm
Decoding PBCH for cell 1 (N_id_2=1)
Setting sampling rate 5.76 MHz
Software Radio Systems, Ltd: cannot connect to X server

Let me know if you need me to attach any additional file. 
Any help will be appreciated.


Thank you,
Raghav Rathi