OAI 5G configuration files
CU/DU configuration
1. Configure the values from the TAC and PLMN inside the CU and DU files(/path/to/oai/targets/PROJECTS/GENERIC-NR-5GC/CONF/) (Fig. 1).
Important: These values are contained in the container OAI-AMF configuration (/path/to/oai-cn5g-fed/docker-compose/docker-compose-nrf.yaml).
Figure 1 - PLMN and TAC
2. Configure the interface N2 to connect CU with 5G Core (/path/to/oai/targets/PROJECTS/GENERIC-NR-5GC/CONF/cu) (Fig. 2)
a. You can find the OAI-AMF address inside /path/to/oai-cn5g-fed/docker-compose/docker-compose-nrf.yaml.
b. When installing Core a virtual interface(demo-oai) is created, this interface serves to connect the respective computer with OAI 5G Core. 
Figure 2 - N2 Interface
UE configuration
1. Configure the values of: imsi, key, opc, dnn, nssai_sst, nssai_sd.
a. Inside the file /path/to/oai-cn5g-fed/docker-compose/database/oai_db.sql, you can find the values of: imsi, key, opc.
i. You can modify the SQL file changing the file name inside /path/to/oai-cn5g-fed/docker-compose/docker-compose-nrf.yaml.
b. Inside the container OAI-AMF configuration (/path/to/oai-cn5g-fed/docker-compose/docker-compose-nrf.yaml), you can find the values: dnn, nssai_sst, nssai_sd.
NR Softmodem configuration
To run the configuration CU/DU with FlexRIC, it is necessary to fix the NodeB ID in the source code.
1. Add "nb_id = rrc->configuration.cell_identity;" in both "else if" (Fig. 3).
Figure 3 - NR source code
Script to run
1. The script "run_SIMU_oai_ran.sh" runs the OAI CU/DU simulation with FlexRIC.
i. You can check if the CU is well connected with the command: "docker logs oai-amf".
2. The script "run_SIMU_oai_ran_w_UE.sh" runs the simulation of OAI CU/DU,FlexRIC connected with UE.
3. The script "run_USRP_oai_UE.sh" runs the OAI UE on the USRP.
4. The script "run_USRP_oai_ran.sh" runs the OAI CU/DU with FlexRIC on the USRP.