AmariSoft LTE

Prerequisites

This tutorial series assumes you have an ​ORBIT account, have ​scheduled a session on the ORBIT testbed, are familiar with ​SSH'ing into the testbed itself, and are familiar with the ​basics of running ORBIT experiments. If you have not done these things yet, you may wish to do so before taking a look at this slightly more advanced experiment. If you are unfamiliar with or are entirely new to ORBIT, you may wish to start ​here.

Imaging

The image used for this experiment is 'baseline.ndz'. In this tutorial we will use nodes equipped with Netgear AC341u LTE dongles. The basestation is Amarisoft running on Bsc03out.

During a normal experiment using OMF, the following actions are scripted and automated. This is a look at the steps involved in something as simple as starting an LTE connection behind the scenes.

You will run the following commands on node7-1.grid.orbit-lab.org

After connecting to the grid console:

1. omf load -i baseline.ndz -t node7-1.grid.orbit-lab.org
2. omf tell -a on -t node7-1.grid.orbit-lab.org
   1. It will take roughly 60 seconds to come up.
3. ssh root@node7-1.grid.orbit-lab.org

Commands on the node

By Default Orbit nodes do not configure any wireless devices. The following 2 are the drivers for the Sierra wireless Netgear LTE dongle

1. modprobe GobiSerial
2. modprobe GobiNet
3. minicom -D /dev/ttyUSB1
4. AT!ippassthrough?
   1. It should return 1
   2. If it does not, run the following commands:
      1. AT!ippassthrough=1
      2. AT!dxcfg=profile,Autoconnect,Never
      3. AT!reset
5. AT!entercnd="A710"
   1. You should see OK
6. AT!dxcfg=wwan,connect,11
   1. You should see OK then $QCRMCALL: 1, V4
7. at!gstatus?
   1. Will return a status like:

      at!gstatus?                                                                                                         
      !GSTATUS: 
      Current Time:  10049            Temperature: 42
      Bootup Time:   0                Mode:        ONLINE         
      System mode:   LTE              PS state:    Attached     
      LTE band:      B25              LTE bw:      10 MHz  
      LTE Rx chan:   8365             LTE Tx chan: 26365
      EMM state:     Registered       Normal Service 
      RRC state:     RRC Connected  
      IMS reg state: No Srv  
      
      RSSI (dBm):    -83              Tx Power:    0
      RSRP (dBm):    -117             TAC:         0001 (1)
      RSRQ (dB):     -10              Cell ID:     01A2D001 (27447297)
      SINR (dB):      1.6
      

8. Exit Minicom by PRESSING Ctrl+A followed by x, then enter to select ok.
9. dhcpcd eth2 followed by enter to get a new line.
   1. You should get an address in the 192.168.3.0/24 subnet.
10. ping 192.168.3.1
    1. You have successfully communicated with the basestation.
    2. You can cancel the ping with Ctrl+C
11. iperf -c 192.168.3.1
    1. This will report your bandwidth to the basestation.