This tutorial contains instructions for running the openairinterface eNB and UE on various platforms. == Prerequisites == 1. Two nodes, with appropriate hardware, within RF range 1. Currently supported: USRP x310, USRP 2974, USRP b210 1. Load the image {{{omf-baseline-oai-1804.ndz}}} onto both nodes 1. Turn the nodes on 1. 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 1. edit the file /opt/oaiscripts/run_enb.sh for the SDR in use, for example, set SDR IP addr and max gain 1. run /opt/oaiscripts/run_enb.sh == On Node 2 == 1. run /opt/oaiscripts/build_oai.sh to build for the current hardware and kernel 1. edit the file /opt/oaiscripts/run_ue.sh for the SDR in use, for example, set SDR IP addr and max gain 1. 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 == * physical attenuation * received signal at UE * received signal at eNB * pdsch constellation at UE * pdsch constellation at eNB == Expected Performance == This depends on a number of factors, including: * the total bandwidth (number of resource blocks) * 5mhz:25prb * 10mhz:50prb * 20mhz:100prb * p(d/u)sch modulation: * qpsk * 16qam * 64qam * 256qam * FDD vs TDD * number of MIMO channels * control vs data channel split For the default config file in this tutorial, it's: * 1/1 non-mimo * FDD band 7 * 5mhz/25PRB * up to 256qam, depending on signal * control / data split of (0.25/0.75?) * so you can expect up to 19mbps downlink at 64qam, and 25mbps downlink at 256qam == Specifics per domain == === sb2.cosmos-lab.org === 1. set usrp address to "type=x3xx,resource=rio0" 1. on eNB, set att_tx=70, att_rx=10 1. 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" 1. 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" 1. configure RF matrix for 60db of attenuation between eNB and UE node chosen