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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
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[srsenb] throws "get_npucch(): Invalid parameters" #415

Closed Lightchaos closed 4 years ago

Lightchaos commented 4 years ago

Before filing an issue, search for solutions here:

Issue Description

As soon as I connect with my sysmocom custom SIM(using an iPhone SE), srsenb establishes a connection. Instead it throws the error "get_npucch(): Invalid parameters". After ~3-5 minutes srsenb just stops/crashes. I used the current master branch tag/release_19_09.

Setup Details

[Specify details of the test setup. This would help us reproduce the problem reliably] The setup is as follows: Running srsenb over Ettus Research B210 (driver: UHD_3.14.1.HEAD-0-g98c7c986) OS: Ubuntu 18.04.3 LTS UE is an iPhone SE with a programmable SIM from sysmocom I use ip-forwarding and nat to connect the connected phone to the internet.

Expected Behavior

[What you expect to happen] No get_npucch(): Invalid parameters exception in the console.

Actual Behaviour

[What happens instead e.g. error message] Spamming "get_npucch(): Invalid parameters" in the terminal I run srsenb from and srsenb stops/crashes after 3-5 minutes of spamming.

Steps to reproduce the problem

[Tell us how to reproduce this issue e.g. RF setup, application config files] Configs: I added the SIM entry of my sysmocom SIM in user_db.csv. I changed the in the mme section of enb.conf and epc.conf the values of mcc to 901 and the value of mnc to 70. I also changed the value of dl_earfcn in enb.conf to 1300.

Steps:

  1. start sudo srsepc
  2. start sudo srsenb
  3. switch phone either on/off or turn flight mode on/off so your phone looks for a network
  4. as soon as the phone connects to the enb, the terminal throws "get_npucch(): Invalid parameters" multiple times.

Additional Information

[Any additional information, configuration or data that might be necessary to reproduce the issue] To verify I didn't do anything wrong, I used the tag/release_19_06 to check if it works. It works fine there, with no "get_npucch(): Invalid parameters" exception thrown. The outputs of the terminal, log as well as pcap are attached.

Outputs.zip

xavierarteaga commented 4 years ago

Thanks, this issue should have been fixed for next release.