[srslte-users] UE not attaching

Mon Aug 26 11:39:49 UTC 2019

Hi all,
I'm a master student working with srsLTE, with limeSDR and a COTS UE. The
COTS UE was able to attach to the eNodeB and suddenly one day started to
have problems to attach. Sometimes it's attach quickly (first attempt for
example) but sometimes does not attach or takes long. What could it be the
problem?
I'm sending the log of the eNodeB and EPC.

The output of the console is this one:

Reading configuration file /root/.config/srslte/enb.conf...
[INFO] [UHD] linux; GNU C++ version 8.3.0; Boost_106700;
UHD_3.14.0.0-0-unknown
Soapy has found device #0: addr=1d50:6108, driver=lime, label=LimeSDR-USB
[USB 3.0] 9081C05C10C26, media=USB 3.0, module=FX3, name=LimeSDR-USB,
serial=0009081C05C10C26,
[INFO] Make connection: 'LimeSDR-USB [USB 3.0] 9081C05C10C26'
[INFO] Reference clock 30.72 MHz
[INFO] Device name: LimeSDR-USB
[INFO] Reference: 30.72 MHz
[INFO] LMS7002M calibration values caching Disable
Setting up Rx stream with 1 channel(s)
Setting up Tx stream with 1 channel(s)
[INFO] RX LPF configured
Set Rx bandwidth to 2.50 MHz
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 5
MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
Set Tx bandwidth to 5.00 MHz
Available device sensors:
 - clock_locked
 - lms7_temp
Available sensors for Rx channel 0:
 - lo_locked
[INFO] Tx calibration finished
[INFO] Rx calibration finished
State of gain elements for Rx channel 0 (AGC not supported):
 - TIA: 9.00 dB
 - LNA: 30.00 dB
 - PGA: -4.00 dB
State of gain elements for Tx channel 0 (AGC not supported):
 - TIA: 9.00 dB
 - LNA: 30.00 dB
 - PGA: -4.00 dB
Rx antenna set to LNAL
Tx antenna set to BAND1

Warning burst preamble is not calibrated for device lime. Set a value
manually

Setting frequency: DL=1842.1 Mhz, UL=1747.1 MHz
Set master clock rate to 23.04 MHz
Setting Sampling frequency 5.76 MHz
[INFO] RX LPF configured
Set Rx bandwidth to 4.32 MHz
[INFO] Rx calibration finished
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 5
MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
Set Tx bandwidth to 5.00 MHz
[INFO] Tx calibration finished

==== eNodeB started ===
Type <t> to view trace
RACH:  tti=8341, preamble=42, offset=1, temp_crnti=0x46
[WARNING] L
Disconnecting rnti=0x46.
RACH:  tti=9771, preamble=1, offset=1, temp_crnti=0x47
Disconnecting rnti=0x47.
RACH:  tti=9861, preamble=18, offset=1, temp_crnti=0x48
Disconnecting rnti=0x48.
RACH:  tti=9951, preamble=13, offset=1, temp_crnti=0x49
Disconnecting rnti=0x49.
RACH:  tti=10041, preamble=10, offset=1, temp_crnti=0x4a
Disconnecting rnti=0x4a.
RACH:  tti=10131, preamble=10, offset=1, temp_crnti=0x4b
Disconnecting rnti=0x4b.
RACH:  tti=10221, preamble=13, offset=1, temp_crnti=0x4c
Disconnecting rnti=0x4c.
RACH:  tti=10211, preamble=0, offset=1, temp_crnti=0x4d
Disconnecting rnti=0x4d.
RACH:  tti=1411, preamble=3, offset=1, temp_crnti=0x4e
Disconnecting rnti=0x4e.
RACH:  tti=1501, preamble=46, offset=1, temp_crnti=0x4f
Disconnecting rnti=0x4f.
RACH:  tti=1591, preamble=43, offset=1, temp_crnti=0x50
Disconnecting rnti=0x50.
RACH:  tti=1681, preamble=3, offset=1, temp_crnti=0x51
Disconnecting rnti=0x51.
RACH:  tti=1771, preamble=39, offset=1, temp_crnti=0x52
Disconnecting rnti=0x52.
RACH:  tti=1761, preamble=3, offset=1, temp_crnti=0x53
Disconnecting rnti=0x53.
RACH:  tti=3191, preamble=2, offset=1, temp_crnti=0x54
Disconnecting rnti=0x54.
RACH:  tti=3281, preamble=15, offset=1, temp_crnti=0x55
Disconnecting rnti=0x55.
RACH:  tti=3371, preamble=32, offset=1, temp_crnti=0x56
Disconnecting rnti=0x56.
RACH:  tti=3461, preamble=8, offset=1, temp_crnti=0x57
Disconnecting rnti=0x57.
RACH:  tti=3551, preamble=21, offset=1, temp_crnti=0x58
Disconnecting rnti=0x58.
RACH:  tti=3531, preamble=15, offset=1, temp_crnti=0x59
Disconnecting rnti=0x59.
RACH:  tti=4971, preamble=37, offset=1, temp_crnti=0x5a
Disconnecting rnti=0x5a.
RACH:  tti=5061, preamble=45, offset=1, temp_crnti=0x5b
Disconnecting rnti=0x5b.
RACH:  tti=5151, preamble=23, offset=1, temp_crnti=0x5c
Disconnecting rnti=0x5c.
RACH:  tti=5241, preamble=20, offset=1, temp_crnti=0x5d
Disconnecting rnti=0x5d.
RACH:  tti=5331, preamble=6, offset=1, temp_crnti=0x5e
Disconnecting rnti=0x5e.
RACH:  tti=5301, preamble=45, offset=1, temp_crnti=0x5f
Disconnecting rnti=0x5f.
RACH:  tti=6731, preamble=9, offset=1, temp_crnti=0x60
Disconnecting rnti=0x60.
RACH:  tti=6821, preamble=43, offset=1, temp_crnti=0x61
RACH:  tti=6911, preamble=19, offset=1, temp_crnti=0x62
Disconnecting rnti=0x61.
Disconnecting rnti=0x62.
RACH:  tti=7001, preamble=6, offset=1, temp_crnti=0x63
Disconnecting rnti=0x63.
RACH:  tti=7091, preamble=42, offset=1, temp_crnti=0x64
Disconnecting rnti=0x64.
RACH:  tti=3591, preamble=3, offset=1, temp_crnti=0x65
Disconnecting rnti=0x65.
RACH:  tti=5011, preamble=29, offset=1, temp_crnti=0x66
Disconnecting rnti=0x66.
RACH:  tti=5101, preamble=37, offset=1, temp_crnti=0x67
Disconnecting rnti=0x67.
RACH:  tti=5191, preamble=12, offset=1, temp_crnti=0x68
Disconnecting rnti=0x68.
RACH:  tti=5391, preamble=26, offset=1, temp_crnti=0x69
Disconnecting rnti=0x69.
RACH:  tti=5481, preamble=16, offset=1, temp_crnti=0x6a
Disconnecting rnti=0x6a.
RACH:  tti=5571, preamble=23, offset=1, temp_crnti=0x6b
Disconnecting rnti=0x6b.
RACH:  tti=5661, preamble=39, offset=1, temp_crnti=0x6c
Disconnecting rnti=0x6c.
RACH:  tti=5751, preamble=11, offset=1, temp_crnti=0x6d
Disconnecting rnti=0x6d.
RACH:  tti=5841, preamble=48, offset=1, temp_crnti=0x6e
Disconnecting rnti=0x6e.
RACH:  tti=5831, preamble=0, offset=1, temp_crnti=0x6f
Disconnecting rnti=0x6f.
RACH:  tti=7251, preamble=18, offset=1, temp_crnti=0x70
Disconnecting rnti=0x70.
RACH:  tti=7341, preamble=47, offset=1, temp_crnti=0x71
Disconnecting rnti=0x71.
RACH:  tti=7431, preamble=32, offset=1, temp_crnti=0x72
Disconnecting rnti=0x72.
RACH:  tti=7521, preamble=12, offset=1, temp_crnti=0x73
Disconnecting rnti=0x73.
RACH:  tti=7611, preamble=33, offset=1, temp_crnti=0x74
Disconnecting rnti=0x74.
RACH:  tti=7801, preamble=16, offset=1, temp_crnti=0x75
Disconnecting rnti=0x75.
RACH:  tti=7891, preamble=43, offset=1, temp_crnti=0x76
Disconnecting rnti=0x76.
RACH:  tti=7981, preamble=20, offset=1, temp_crnti=0x77
Disconnecting rnti=0x77.
RACH:  tti=8071, preamble=44, offset=1, temp_crnti=0x78
Disconnecting rnti=0x78.
RACH:  tti=8161, preamble=48, offset=1, temp_crnti=0x79
Disconnecting rnti=0x79.
RACH:  tti=8131, preamble=47, offset=1, temp_crnti=0x7a
Disconnecting rnti=0x7a.
RACH:  tti=9571, preamble=30, offset=1, temp_crnti=0x7b
Disconnecting rnti=0x7b.
RACH:  tti=9661, preamble=26, offset=1, temp_crnti=0x7c
Disconnecting rnti=0x7c.
RACH:  tti=9751, preamble=37, offset=1, temp_crnti=0x7d
Disconnecting rnti=0x7d.
RACH:  tti=9841, preamble=7, offset=1, temp_crnti=0x7e
Disconnecting rnti=0x7e.
RACH:  tti=9931, preamble=13, offset=1, temp_crnti=0x7f
Disconnecting rnti=0x7f.
RACH:  tti=9901, preamble=50, offset=1, temp_crnti=0x80
Disconnecting rnti=0x80.
RACH:  tti=1091, preamble=9, offset=1, temp_crnti=0x81
Disconnecting rnti=0x81.
RACH:  tti=1181, preamble=50, offset=1, temp_crnti=0x82
Disconnecting rnti=0x82.
RACH:  tti=1271, preamble=16, offset=1, temp_crnti=0x83
Disconnecting rnti=0x83.
RACH:  tti=1361, preamble=10, offset=1, temp_crnti=0x84
Disconnecting rnti=0x84.
RACH:  tti=1451, preamble=29, offset=1, temp_crnti=0x85
Disconnecting rnti=0x85.
RACH:  tti=1421, preamble=31, offset=1, temp_crnti=0x86
Disconnecting rnti=0x86.
RACH:  tti=2851, preamble=40, offset=1, temp_crnti=0x87
Disconnecting rnti=0x87.
RACH:  tti=2941, preamble=36, offset=1, temp_crnti=0x88
Disconnecting rnti=0x88.
RACH:  tti=3031, preamble=16, offset=1, temp_crnti=0x89
Disconnecting rnti=0x89.
RACH:  tti=3121, preamble=0, offset=1, temp_crnti=0x8a
Disconnecting rnti=0x8a.
RACH:  tti=3211, preamble=21, offset=1, temp_crnti=0x8b
Disconnecting rnti=0x8b.
RACH:  tti=1651, preamble=42, offset=1, temp_crnti=0x8c
Disconnecting rnti=0x8c.
RACH:  tti=3091, preamble=7, offset=1, temp_crnti=0x8d
Disconnecting rnti=0x8d.
RACH:  tti=3181, preamble=10, offset=1, temp_crnti=0x8e
Disconnecting rnti=0x8e.
RACH:  tti=3271, preamble=37, offset=1, temp_crnti=0x8f
Disconnecting rnti=0x8f.
RACH:  tti=3361, preamble=44, offset=1, temp_crnti=0x90
Disconnecting rnti=0x90.
RACH:  tti=3451, preamble=35, offset=1, temp_crnti=0x91
Disconnecting rnti=0x91.
RACH:  tti=3421, preamble=43, offset=1, temp_crnti=0x92
Disconnecting rnti=0x92.
RACH:  tti=4831, preamble=2, offset=1, temp_crnti=0x93
Disconnecting rnti=0x93.
RACH:  tti=4921, preamble=2, offset=1, temp_crnti=0x94
Disconnecting rnti=0x94.
RACH:  tti=5011, preamble=31, offset=1, temp_crnti=0x95
Disconnecting rnti=0x95.
RACH:  tti=5101, preamble=42, offset=1, temp_crnti=0x96
Disconnecting rnti=0x96.
RACH:  tti=5191, preamble=29, offset=1, temp_crnti=0x97
Disconnecting rnti=0x97.
RACH:  tti=5281, preamble=27, offset=1, temp_crnti=0x98
Disconnecting rnti=0x98.
RACH:  tti=5261, preamble=11, offset=1, temp_crnti=0x99
Disconnecting rnti=0x99.
RACH:  tti=6671, preamble=37, offset=1, temp_crnti=0x9a
Disconnecting rnti=0x9a.
RACH:  tti=6761, preamble=37, offset=1, temp_crnti=0x9b
Disconnecting rnti=0x9b.
RACH:  tti=6851, preamble=8, offset=1, temp_crnti=0x9c
Disconnecting rnti=0x9c.
RACH:  tti=6941, preamble=1, offset=1, temp_crnti=0x9d
Disconnecting rnti=0x9d.
RACH:  tti=7031, preamble=44, offset=1, temp_crnti=0x9e
Disconnecting rnti=0x9e.
RACH:  tti=7121, preamble=1, offset=1, temp_crnti=0x9f
Disconnecting rnti=0x9f.
RACH:  tti=7111, preamble=21, offset=1, temp_crnti=0xa0
Disconnecting rnti=0xa0.
RACH:  tti=8551, preamble=12, offset=1, temp_crnti=0xa1
Disconnecting rnti=0xa1.
RACH:  tti=8641, preamble=9, offset=1, temp_crnti=0xa2
Disconnecting rnti=0xa2.
RACH:  tti=8731, preamble=24, offset=1, temp_crnti=0xa3
Disconnecting rnti=0xa3.
RACH:  tti=8821, preamble=50, offset=1, temp_crnti=0xa4
Disconnecting rnti=0xa4.
RACH:  tti=8911, preamble=32, offset=1, temp_crnti=0xa5
Disconnecting rnti=0xa5.
RACH:  tti=8871, preamble=46, offset=1, temp_crnti=0xa6
Disconnecting rnti=0xa6.
RACH:  tti=71, preamble=7, offset=1, temp_crnti=0xa7
Disconnecting rnti=0xa7.
RACH:  tti=161, preamble=24, offset=1, temp_crnti=0xa8
Disconnecting rnti=0xa8.
RACH:  tti=251, preamble=26, offset=1, temp_crnti=0xa9
Disconnecting rnti=0xa9.
RACH:  tti=341, preamble=22, offset=1, temp_crnti=0xaa
Disconnecting rnti=0xaa.
RACH:  tti=431, preamble=31, offset=1, temp_crnti=0xab
Disconnecting rnti=0xab.
RACH:  tti=9311, preamble=32, offset=1, temp_crnti=0xac
Disconnecting rnti=0xac.
RACH:  tti=491, preamble=22, offset=1, temp_crnti=0xad
Disconnecting rnti=0xad.
RACH:  tti=581, preamble=37, offset=1, temp_crnti=0xae
Disconnecting rnti=0xae.
RACH:  tti=671, preamble=41, offset=1, temp_crnti=0xaf
Disconnecting rnti=0xaf.
RACH:  tti=761, preamble=51, offset=1, temp_crnti=0xb0
Disconnecting rnti=0xb0.
RACH:  tti=851, preamble=35, offset=1, temp_crnti=0xb1
Disconnecting rnti=0xb1.
RACH:  tti=941, preamble=30, offset=1, temp_crnti=0xb2
Disconnecting rnti=0xb2.
RACH:  tti=911, preamble=6, offset=1, temp_crnti=0xb3
Disconnecting rnti=0xb3.
RACH:  tti=2331, preamble=24, offset=1, temp_crnti=0xb4
Disconnecting rnti=0xb4.
RACH:  tti=2421, preamble=49, offset=1, temp_crnti=0xb5
Disconnecting rnti=0xb5.
RACH:  tti=2511, preamble=39, offset=1, temp_crnti=0xb6
Disconnecting rnti=0xb6.
RACH:  tti=2601, preamble=32, offset=1, temp_crnti=0xb7
Disconnecting rnti=0xb7.
RACH:  tti=2691, preamble=8, offset=1, temp_crnti=0xb8
Disconnecting rnti=0xb8.
RACH:  tti=2781, preamble=39, offset=1, temp_crnti=0xb9
Disconnecting rnti=0xb9.
RACH:  tti=2761, preamble=16, offset=1, temp_crnti=0xba
Disconnecting rnti=0xba.
RACH:  tti=4171, preamble=28, offset=1, temp_crnti=0xbb
Disconnecting rnti=0xbb.
RACH:  tti=4261, preamble=48, offset=1, temp_crnti=0xbc
Disconnecting rnti=0xbc.
RACH:  tti=4351, preamble=43, offset=1, temp_crnti=0xbd
Disconnecting rnti=0xbd.
RACH:  tti=4441, preamble=34, offset=1, temp_crnti=0xbe
Disconnecting rnti=0xbe.
RACH:  tti=4531, preamble=3, offset=1, temp_crnti=0xbf
Disconnecting rnti=0xbf.
RACH:  tti=4621, preamble=28, offset=1, temp_crnti=0xc0
Disconnecting rnti=0xc0.
RACH:  tti=4611, preamble=6, offset=1, temp_crnti=0xc1
Disconnecting rnti=0xc1.
RACH:  tti=6051, preamble=26, offset=1, temp_crnti=0xc2
Disconnecting rnti=0xc2.
RACH:  tti=6141, preamble=39, offset=1, temp_crnti=0xc3
Disconnecting rnti=0xc3.
RACH:  tti=6231, preamble=15, offset=1, temp_crnti=0xc4
Disconnecting rnti=0xc4.
RACH:  tti=6321, preamble=50, offset=1, temp_crnti=0xc5
Disconnecting rnti=0xc5.
RACH:  tti=6411, preamble=30, offset=1, temp_crnti=0xc6
Disconnecting rnti=0xc6.
RACH:  tti=6381, preamble=50, offset=1, temp_crnti=0xc7
Disconnecting rnti=0xc7.
^CStopping srsENB... Press Ctrl+C 9 more times to force stop
RACH:  tti=7791, preamble=28, offset=1, temp_crnti=0xc8
Disconnecting rnti=0xc8.
RACH:  tti=7881, preamble=11, offset=1, temp_crnti=0xc9
Disconnecting rnti=0xc9.
RACH:  tti=7971, preamble=36, offset=1, temp_crnti=0xca
Disconnecting rnti=0xca.
RACH:  tti=8061, preamble=17, offset=1, temp_crnti=0xcb
Disconnecting rnti=0xcb.
RACH:  tti=8151, preamble=34, offset=1, temp_crnti=0xcc
Disconnecting rnti=0xcc.
RACH:  tti=8241, preamble=34, offset=1, temp_crnti=0xcd
Disconnecting rnti=0xcd.
[WARNING] popping from TX, samples popped 60/1020
---  exiting  ---

Thanks in advance!
Federico Quattrin
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