This tutorial contains instructions for running the openairinterface eNB and UE on various platforms.

Prerequisites

1. Two nodes, with appropriate hardware, within RF range
2. Currently supported: USRP x310, USRP 2974, USRP b210
3. Load the image omf-baseline-oai-1804.ndz onto both nodes
4. Turn the nodes on
5. If graphical display is desired, enable x11 tunneling to console and then to nodes

On node 1

1. run /opt/oaiscripts/build_oai.sh to build for the current hardware and kernel
2. edit the file /opt/oaiscripts/run_enb.sh for the SDR in use, for example, set SDR IP addr and max gain
3. run /opt/oaiscripts/run_enb.sh

On Node 2

1. run /opt/oaiscripts/build_oai.sh to build for the current hardware and kernel
2. edit the file /opt/oaiscripts/run_ue.sh for the SDR in use, for example, set SDR IP addr and max gain
3. run /opt/oaiscripts/run_ue.sh

Understanding xforms terms and plots

• Explanations from:
  • ​https://www.mathworks.com/help/lte/physical-channels.html

• PBCH: physical broadcast channel
  • The PBCH carries part of the system information required for terminals to access the network
• PUSCH: physical uplink control channel
• PDCCH: physical downlink control channel
  • The PDCCH conveys control information, scheduling decisions for PDSCH reception, and for scheduling grants enabling transmission on the PUSCH.
• PUSCH: physical uplink shared channel
• PDSCH: physical downlink shared channel
  • The PDSCH carries user data and paging information to the terminal.

Calibration

Specifics per domain

sb2.cosmos-lab.org

1. set usrp address to "type=x3xx,resource=rio0"
2. on eNB, set att_tx=70, att_rx=10
3. use RFSWITCH service to set all switches to port 1 for antenna

sb2.orbit-lab.org

1. set usrp address to "type=x3xx,addr=192.168.40.2"
2. bring up usrp ethernet interface, set ip to 192.168.40.1/16

sb1.orbit-lab.org

1. set usrp address to "type=b210"

sb4.orbit-lab.org

1. set usrp address to "type=b210"
2. configure RF matrix for 60db of attenuation between eNB and UE node chosen