UE attach in TDD mode. #28
Replies: 15 comments 33 replies
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Better to create a new conversation, thanks. Can you attach logs with |
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gnb.log The gnB config that I am using: |
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Another gNB log: For all these tests above, internal clock is selected for gNB(x310) |
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With Telit 5G modem also, network scan lists the cell but attach not happening, |
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Thanks @andrepuschmann . I will try with the current main. |
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Hi @andrepuschmann , I tried with the current main, now I see error while starting gNB. `cci-nuc13@ccinuc13-NUC12DCMi9:~/github/srsRAN_Project/configs$ sudo gnb -c gnb_rf_b200_tdd_n78_20mhz.yml --== srsRAN gNB (commit fbe73a4) ==-- Connecting to AMF on 127.0.0.5:38412 03/21 12:43:07.790: [app] INFO: UDR initialize...done (../src/udr/app.c:31) |
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Can you remove the sc12 in the config and try again? |
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I tried after commenting out: #otw_format: sc12 In the gNB logs, I see late messages as earlier: |
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Hi @andrepuschmann , any suggestion on how to make attach work? |
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Hi @asheeshtripathi , it looks you are having some RT issues in your run:
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Also @asheeshtripathi, can you see if this command reduces the number of lates: |
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@ismagom , yes NUC has WiFi card. I have disabled it via network manager. Do you want me to disable it in BIOS? |
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I think I have more and less the same problem as you, @asheeshtripathi, when testing with USRP B210. The COTS UE does not seem to attach when testing with N78 and SCS 30KHz. I have tested both 10MHz and 20MHz bandwidth. I have set the governor to performance mode and checked no processes are running in the background. I am getting no overflows or underflows. I tried disabling wifi and also tried echo N | sudo tee /sys/module/drm_kms_helper/parameters/poll , and I am still getting some L2 lates (I find it strange that the amount of L2 lates do not appear in the gNB console under "lates," but only in the logs). Here are my gNB logs gnb.log |
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No, disabling in network manger should be enough. |
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No. It didn't help. I still see the late messages in gNB.
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Hi @mubk00 and @asheeshtripathi, I think there has been a slight diversion of the topic of the thread. Just to be clear, those L2 lates are not the cause that prevents the UE from being attached. As @andrepuschmann commented above: We are working on this issue and expect to provide a fix this week. Regarding the L2 lates, if you only seen them once every ~2-3 seconds, they are not harmful. It's not ideal, but is not the issue preventing the UE to attach in band n78. |
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Hey @ismagom. Thanks for the clarification! 👍 I did not see his message, sorry! |
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I still see these messages in the gNB logs:
Any solution for this. I am not able to attach UE to the gNB yet. |
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After configuring the bandwidth to 20 MHz:
logs: @ismagom @andrepuschmann any idea what is the issue here. |
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Besides the lates, as I said above, I don't think y are the cause that prevent the UE from attaching |
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I have been using the performance script since beginning. |
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For time_alignment_calibration Parameter, I need to first receive below prints in the gNB logs as per document:
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Can you verify again you're using the latest commit on |
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Hi @andrepuschmann , I am using the |
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After configuring the PLMN to 00101 I see these messages in the gNB logs. I never saw them with PLMN 99970. 2023-04-05T20:59:43.797783 [DL-PHY ] [I] [ 160.0] Ignored SSB: pci=1 ssb_idx=0 L_max=8 common_scs=30 sc_offset=14 offset_PointA=24 pattern=C beta_pss=+0.0dB slot=160.0 ports=0 |
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Hi @andrepuschmann and @ismagom, I tried with plmn 00101, band n41-20MHz, and used B210 (instead of x310): I see some progress, UE attempted attach and PRACH arrived properly at gNB but there was issue with Open5GS core UE DB config.
gNB config and log console terminal print: However when I am trying again with same config, I don't see the PRACH. |
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Hi @andrepuschmann and @ismagom , I am finally able to attach to the network with the COTS UE. Below are the configurations tried: I faced issue mentioned in #11 but resolved it. However UE gets disconnected with in 10-15 seconds. In NGAP pcap , Sometimes I see gNB stdout: `[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping. ==== gNodeB started === pci rnti cqi mcs brate ok nok (%) | pusch mcs brate ok nok (%) bsr pci rnti cqi mcs brate ok nok (%) | pusch mcs brate ok nok (%) bsr Open5GS stdout: logs and config: |
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Hi @andrepuschmann, @ismagom, Thank you for all the help. I was able to attach and test throughput with the COTS UE. Config: band 78, BW 20 MHz, TDD mode, gNB and open5GS PLMN 90170, IMSI: 00101(SysmoCom SJA2)
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That's great. Glad you got it working. |
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Hello @asheeshtripathi How did you solve Internet Access from your cost ue? 04/18 16:24:58.035: [smf] INFO: [Added] Number of SMF-UEs is now 1 (../src/smf/context.c:1019) That is the IP created for the UE. I tested the ping successfully, but I can't connect to the internet. |
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Did you enable IP forwarding and added NAT rule (for masquerading)? |
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Hi @Erick5G , you need to enable IP forwarding and add the NAT rule. I run a script every time I reboot my core machine/VM. This creates the tunnel, enables IP forwarding and adds NAT rule. You should get Internet access when you run following: you can make a script with these commands and use it whenever required. |
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Thank you, so much @asheeshtripathi :D for the NAT rules. Here is the command sudo ip addr add 10.45.0.1/16 dev ogstun |
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Hello Everyone, I am not getting any data while running 'test mode' in srsRAN. I was wondering what the issue could be? sudo gnb -c srsRAN_main/uhd/build/gnb_b210_20MHz_oneplus_8t.yml --== srsRAN gNB (commit ee1d86c) ==-- The PRACH detector will not meet the performance requirements with the configuration {Format B4, ZCZ 0, SCS 30kHz, Rx ports 1}. N2: Connection to AMF on 127.0.1.100:38412 completed Available commands: Config File This configuration file example shows how to configure the srsRAN Project gNB to connect to a COTS UE. As with the associated tutorial, this config has been tested with a OnePlus 8T. A B210 USRP is used as the RF-frontend.This config creates a TDD cell with 20 MHz bandwidth in band 78.To run the srsRAN Project gNB with this config, use the following command:sudo ./gnb -c gnb_b210_20MHz_oneplus_8t.yamlcu_cp: ru_sdr: cell_cfg: common_scs: 30 # Subcarrier spacing in kHz used for data. test_mode: test_ue: pcap: |
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Hi Everyone, I am trying with x310 as srsRAN project gnB, I am able to get gNB up with band 78 in TDD mode with SCS 30 KHz and BW 10 MHz. I modified the DL ARFCN to 639000 to transmit in 3580 to 3590 MHz. I first tried with srsUE on n310 but later found out that its not compatible. I then, programmed a SIM card and tried with Telit fn980 5G kit, there I can see the PLMN (99970, that I configured) but not able to attach to the network, Similarly I tried with, OnePlus 8T, I see 99970 5G in manual network search but can not connect to it.
In gNB console, I see only a few underflows. I am using open5GS core and it is co-located with gNB in Intel NUC 12. I see communication between gNB and core when I start gNB:
gNB prints:
cci-nuc13@ccinuc13-NUC12DCMi9:~/github/srsRAN_Project/configs$ sudo gnb -c gnb_rf_b200_tdd_n78_10mhz.yml
Available radio types: uhd.
--== srsRAN gNB (commit 77be7d3) ==--
[INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_4.1.0.5-3
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Making USRP object with args 'type=x300,addr=192.168.40.2,master_clock_rate=184.32e6,send_frame_size=8000,recv_frame_size=8000'
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
Cell pci=1, bw=10 MHz, dl_arfcn=639000 (n78), dl_freq=3585.0 MHz, dl_ssb_arfcn=638976, ul_freq=3585.0 MHz
==== gNodeB started ===
Type to view trace
tLate: 0; Underflow: 1; Overflow: 0;
Core prints:
03/09 15:34:16.211: [smf] WARNING: PFCP[REQ] has already been associated [127.0.0.7]:8805 (../src/smf/pfcp-sm.c:218)
03/09 15:34:16.211: [upf] WARNING: PFCP[RSP] has already been associated [127.0.0.4]:8805 (../src/upf/pfcp-sm.c:213)
03/09 15:34:20.160: [amf] INFO: gNB-N2 accepted[127.0.0.1]:56318 in ng-path module (../src/amf/ngap-sctp.c:113)
03/09 15:34:20.160: [amf] INFO: gNB-N2 accepted[127.0.0.1] in master_sm module (../src/amf/amf-sm.c:706)
03/09 15:34:20.160: [amf] INFO: [Added] Number of gNBs is now 1 (../src/amf/context.c:1034)
03/09 15:34:20.160: [amf] INFO: gNB-N2[127.0.0.1] max_num_of_ostreams : 30 (../src/amf/amf-sm.c:745)
Please let me know if anyone is able to connect UE in TDD mode. Any document or suggestions.
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