| 21 | | Example script, change parameters as needed: |
| 22 | | * run_enb.sh: |
| 23 | | {{{#!shell |
| 24 | | #! /bin/bash |
| 25 | | #sdr_addrs takes standard uhd arguments, such as: |
| 26 | | #"type=x300,addr=192.168.40.2" #x310 over direct network |
| 27 | | #"type=x300,resource=rio0" #x310 over pcie |
| 28 | | #"type=b210" #b210 over usb |
| 29 | | #values for RUs.[0] override config file, must be set per usrp type |
| 30 | | # -d enables xforms charts |
| 31 | | |
| 32 | | cd /opt/openairinterface5g |
| 33 | | source oaienv |
| 34 | | cd ./cmake_targets |
| 35 | | ./lte_build_oai/build/lte-softmodem \ |
| 36 | | -O $OPENAIR_HOME/ci-scripts/conf_files/enb.band7.tm1.25PRB.usrpb210.conf \ |
| 37 | | --nokrnmod 1 --noS1 --eNBs.[0].rrc_inactivity_threshold 0 \ |
| 38 | | --RUs.[0].att_tx 40 --RUs.[0].att_rx 0 \ |
| 39 | | --usrp-args "type=b200" \ |
| 40 | | -d |
| 41 | | }}} |
| | 18 | For further configuration details, please consult the official srsLTE webpage and documentation. |
| 48 | | Example script, change parameters as needed: |
| 49 | | * run_ue.sh: |
| 50 | | {{{#!shell |
| 51 | | #! /bin/bash |
| 52 | | #sdr_addrs takes standard uhd arguments, such as: |
| 53 | | #"type=x300,addr=192.168.40.2" #x310 over direct network |
| 54 | | #"type=x300,resource=rio0" #x310 over pcie |
| 55 | | #"type=b210" #b210 over usb |
| 56 | | #values for RUs.[0] override config file, must be set per usrp type |
| 57 | | # -d enables xforms charts |
| 58 | | |
| 59 | | cd /opt/openairinterface5g |
| 60 | | source oaienv |
| 61 | | cd ./cmake_targets/lte_build_oai/build |
| 62 | | ./lte-uesoftmodem \ |
| 63 | | -C 2680000000 -r 25 \ |
| 64 | | --ue-scan-carrier --nokrnmod 1 --noS1 \ |
| 65 | | --ue-rxgain 120 --ue-txgain 30 --ue-max-power 0 \ |
| 66 | | --ue-nb-ant-tx 1 --ue-nb-ant-rx 1 \ |
| 67 | | --usrp-args "type=b200" \ |
| 68 | | -d |
| 69 | | }}} |
| 76 | | |
| 77 | | |
| 78 | | == Understanding xforms terms and plots == |
| 79 | | * Explanations from: |
| 80 | | * https://www.mathworks.com/help/lte/physical-channels.html |
| 81 | | |
| 82 | | * PBCH: physical broadcast channel |
| 83 | | * The PBCH carries part of the system information required for terminals to access the network |
| 84 | | * PUSCH: physical uplink control channel |
| 85 | | * PDCCH: physical downlink control channel |
| 86 | | * The PDCCH conveys control information, scheduling decisions for PDSCH reception, and for scheduling grants enabling transmission on the PUSCH. |
| 87 | | * PUSCH: physical uplink shared channel |
| 88 | | * PDSCH: physical downlink shared channel |
| 89 | | * The PDSCH carries user data and paging information to the terminal. |
| 90 | | |
| 91 | | == Calibration == |
| 92 | | * physical attenuation |
| 93 | | * received signal at UE |
| 94 | | * received signal at eNB |
| 95 | | * pdsch constellation at UE |
| 96 | | * pdsch constellation at eNB |
| 97 | | |
| 98 | | == Expected Performance == |
| 99 | | This depends on a number of factors, including: |
| 100 | | * the total bandwidth (number of resource blocks) |
| 101 | | * 5mhz:25prb |
| 102 | | * 10mhz:50prb |
| 103 | | * 20mhz:100prb |
| 104 | | * p(d/u)sch modulation: |
| 105 | | * qpsk |
| 106 | | * 16qam |
| 107 | | * 64qam |
| 108 | | * 256qam |
| 109 | | * FDD vs TDD |
| 110 | | * number of MIMO channels |
| 111 | | * control vs data channel split |
| 112 | | |
| 113 | | For the default config file in this tutorial, it's: |
| 114 | | * 1/1 non-mimo |
| 115 | | * FDD band 7 |
| 116 | | * 5mhz/25PRB |
| 117 | | * up to 256qam, depending on signal |
| 118 | | * control / data split of (0.25/0.75?) |
| 119 | | * so you can expect up to 19mbps downlink at 64qam, and 25mbps downlink at 256qam |
