Multiple UEs with ZMQ Example

This example uses a gnuradio flowgraph (broker) to establish the connection between 5 UEs.

Below is a flowgraph for gnuradio that makes the connection among the uplink and downlink channels for each UE. You will need the free and open source software Gnu Radio which can be obtained on Ubuntu by running:

sudo apt install gnuradio

Please download this file to be run later in the example: https://github.com/openaicellular/main-file-repo/blob/master/OAIC_FIVE_UEs.grc

Setup

edit user_db.csv in /rrot/.config/srsran, with the following:

ue2,xor,001010123456780,00112233445566778899aabbccddeeff,opc,63bfa50ee6523365ff14c1f45f88737d,8000,000000001590,7,dynamic
ue3,xor,001010123456781,00112233445566778899aabbccddeeff,opc,63bfa50ee6523365ff14c1f45f88737d,8002,000000001488,7,dynamic
ue4,xor,001010123456782,00112233445566778899aabbccddeeff,opc,63bfa50ee6523365ff14c1f45f88737d,8003,000000001446,7,dynamic
ue5,xor,001010123456783,00112233445566778899aabbccddeeff,opc,63bfa50ee6523365ff14c1f45f88737d,8004,000000001467,7,dynamic
ue1,xor,001010123456789,00112233445566778899aabbccddeeff,opc,63bfa50ee6523365ff14c1f45f88737d,9001,000000001656,7,dynamic

In a terminal run the following commands for each UE

sudo ip netns add ue1
sudo ip netns add ue2
sudo ip netns add ue3
sudo ip netns add ue4
sudo ip netns add ue5

Set the environment variables

export E2NODE_IP=`hostname  -I | cut -f1 -d' '`
export E2NODE_PORT=5006
export E2TERM_IP=`sudo kubectl get svc -n ricplt --field-selector metadata.name=service-ricplt-e2term-sctp-alpha -o jsonpath='{.items[0].spec.clusterIP}'`

Running the example

Terminal 1

sudo srsepc

Terminal 2

sudo srsenb --enb.n_prb=50 --enb.name=enb1 --enb.enb_id=0x19B --rf.device_name=zmq --rf.device_args="fail_on_disconnect=true,tx_port0=tcp://*:2000,rx_port0=tcp://localhost:2009,tx_port1=tcp://*:2200,rx_port1=tcp://localhost:2201,id=enb,base_srate=23.04e6" --ric.agent.remote_ipv4_addr=${E2TERM_IP} --log.all_level=warn --ric.agent.log_level=debug --log.filename=stdout --ric.agent.local_ipv4_addr=${E2NODE_IP} --ric.agent.local_port=${E2NODE_PORT}

Terminal 3

sudo srsue --rf.device_name=zmq --rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2010,rx_port=tcp://localhost:2008,id=ue1,base_srate=23.04e6" --gw.netns=ue1 --usim.algo=xor --usim.imsi=001010123456789

Terminal 4

sudo srsue --rf.device_name=zmq --rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2007,rx_port=tcp://localhost:2006,id=ue2,base_srate=23.04e6" --gw.netns=ue2 --usim.algo=xor --usim.imsi=001010123456780

Terminal 5

sudo srsue --rf.device_name=zmq --rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2301,rx_port=tcp://localhost:2300,id=ue3,base_srate=23.04e6" --gw.netns=ue3 --usim.algo=xor --usim.imsi=001010123456781

Terminal 6

sudo srsue --rf.device_name=zmq --rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2401,rx_port=tcp://localhost:2400,id=ue4,base_srate=23.04e6" --gw.netns=ue4 --usim.algo=xor --usim.imsi=001010123456782

Terminal 7

sudo srsue --rf.device_name=zmq --rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2501,rx_port=tcp://localhost:2500,id=ue5,base_srate=23.04e6" --gw.netns=ue5 --usim.algo=xor --usim.imsi=001010123456783

Open gnuradio companion and run the provided grc file by opening the file and pressing the play button.

Ping and Iperf test can now be performed to measure performance or generate traffic to each connected UE.