search

srsran / srsRAN_4G

Open source SDR 4G software suite from Software Radio Systems (SRS) https://docs.srsran.com/projects/4g
https://www.srsran.com
GNU Affero General Public License v3.0
3.47k stars 1.14k forks source link

COTS UE cannot UL data communication for BW20MHz on 4G with RF board USRP #1170

Closed fj0831ec closed 1 year ago

fj0831ec commented 1 year ago

Issue Description

[Describe the issue in detail] I have verified COTS UE data communication over LTE using the combination of srsRAN 4G and USRP B200-mini shown below. I have checked Bandwidth 20MHz. COTS UE successfully LTE Attach and PDN Connect without any problem, but Reestablishment is repeated when UL data(U-plane) communication is started. and. [INFO][UHD RF] Tx while waiting for EOB, time out ... is occurs frequently. Radio will not be output from eNB and COTS UE will be out of service.

Setup Details

[Specify details of the test setup. This would help us reproduce the problem reliably] e.g. Network configuration, Operation System, Hardware, RF front-end, library and driver versions Operation System Ubuntu 22.04.02 LTS Hardware Intel® Celeron(R) N5105 @ 2.00GHz × 4 with 8 GiB of Memory RF front-end USRP B210-mini library and driver versions UHD_3.15.0.0-74-ge35f66e8

Expected Behavior

[What you expect to happen] Communication is possible without disconnection

Actual Behaviour

[What happens instead e.g. error message] $ sudo srsenb Active RF plugins: libsrsran_rf_uhd.so Inactive RF plugins: --- Software Radio Systems LTE eNodeB ---

Couldn't open , trying /root/.config/srsran/enb.conf Couldn't open /root/.config/srsran/enb.conf either, trying /etc/srsran/enb.conf Reading configuration file /etc/srsran/enb.conf... Couldn't open sib.conf, trying /root/.config/srsran/sib.conf Couldn't open /root/.config/srsran/sib.conf either, trying /etc/srsran/sib.conf Couldn't open rr.conf, trying /root/.config/srsran/rr.conf Couldn't open /root/.config/srsran/rr.conf either, trying /etc/srsran/rr.conf Couldn't open rb.conf, trying /root/.config/srsran/rb.conf Couldn't open /root/.config/srsran/rb.conf either, trying /etc/srsran/rb.conf WARNING: cpu0 scaling governor is not set to performance mode. Realtime processing could be compromised. Consider setting it to performance mode before running the application.

Built in Release mode using commit 00c972ac4 on branch master.

Opening 1 channels in RF device=default with args=default Supported RF device list: UHD file Trying to open RF device 'UHD' [INFO] [UHD] linux; GNU C++ version 11.3.0; Boost_107400; UHD_3.15.0.0-74-ge35f66e8 [INFO] [LOGGING] Fastpath logging disabled at runtime. Opening USRP channels=1, args: type=b200,master_clock_rate=23.04e6 [INFO] [UHD RF] RF UHD Generic instance constructed [INFO] [B200] Detected Device: B200mini [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] Asking for clock rate 23.040000 MHz... [INFO] [B200] Actually got clock rate 23.040000 MHz. RF device 'UHD' successfully opened

==== eNodeB started === Type to view trace Setting frequency: DL=2120.0 Mhz, UL=1930.0 MHz for cc_idx=0 nof_prb=100 RACH: tti=3151, cc=0, pci=1, preamble=32, offset=1, temp_crnti=0x46 User 0x46 connected [INFO] [UHD RF] Tx while waiting for EOB, timed out... 25.1793 >= 25.1792. Starting new burst... Disconnecting rnti=0x46. RACH: tti=5121, cc=0, pci=1, preamble=51, offset=1, temp_crnti=0x47 RRCReestablishmentReject for rnti=0x47. Cause: no context available Disconnecting rnti=0x47. RACH: tti=5251, cc=0, pci=1, preamble=31, offset=1, temp_crnti=0x48 User 0x48 connected [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.0052 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.0141 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.0232 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.033 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.047 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.062 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.0734 >= 25.1792. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 30.0828 >= 30.0828. Starting new burst... RACH: tti=9061, cc=0, pci=1, preamble=47, offset=3, temp_crnti=0x49 User 0x49 requesting RRC Reestablishment as 0x48. Cause: otherFailure Disconnecting rnti=0x48. User 0x49 connected [INFO] [UHD RF] Tx while waiting for EOB, timed out... 34.2888 >= 34.2888. Starting new burst... RACH: tti=2941, cc=0, pci=1, preamble=5, offset=1, temp_crnti=0x4a User 0x4a requesting RRC Reestablishment as 0x49. Cause: otherFailure Disconnecting rnti=0x49. User 0x4a connected [INFO] [UHD RF] Tx while waiting for EOB, timed out... 46.2616 >= 34.2888. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 46.2724 >= 34.2888. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 46.2842 >= 34.2888. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 46.2943 >= 34.2888. Starting new burst... RACH: tti=3601, cc=0, pci=1, preamble=14, offset=1, temp_crnti=0x4b User 0x4b requesting RRC Reestablishment as 0x4a. Cause: otherFailure Disconnecting rnti=0x4a. User 0x4b connected [INFO] [UHD RF] Tx while waiting for EOB, timed out... 53.49 >= 48.4071. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 53.4988 >= 48.4071. Starting new burst... RACH: tti=531, cc=0, pci=1, preamble=44, offset=1, temp_crnti=0x4c User 0x4c requesting RRC Reestablishment as 0x4b. Cause: otherFailure Disconnecting rnti=0x4b. User 0x4c connected [INFO] [UHD RF] Tx while waiting for EOB, timed out... 56.2741 >= 55.6112. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 56.286 >= 55.6112. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 56.2954 >= 55.6112. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 56.3049 >= 55.6112. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 58.3113 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.2463 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.2625 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.2645 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.2784 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.2878 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.2977 >= 58.3113. Starting new burst... [INFO] [UHD RF] Tx while waiting for EOB, timed out... 59.3072 >= 58.3113. Starting new burst... Disconnecting rnti=0x4c. ^CStopping .. --- exiting ---

Steps to reproduce the problem

[Tell us how to reproduce this issue e.g. RF setup, application config files] Change the following settings in the enb.conf n_prb = 100 dl_earfcn = 100

Additional Information

[Any additional information, configuration or data that might be necessary to reproduce the issue] No problem with Bandwidth=10MHz

nikitos1550 commented 1 year ago

In enb.conf you can find following

# For best performance in 2x2 MIMO and >= 15 MHz use the following device_args settings:
#     USRP B210: num_recv_frames=64,num_send_frames=64
#     And for 75 PRBs, also append ",master_clock_rate=15.36e6" to the device args

You can try add device_args with num_recv_frames=64,num_send_frames=64. The issue you get seems something about performance. You can try same configuration on more powerful PC and compare results.

fj0831ec commented 1 year ago

Thank you for answering. So, when I changed the specs of my PC, the problem no longer occurred. Changed PC specs： Intel(R) Core(TM) i5-8279U CPU @ 2.40GHz with 6 GiB of Memory