wiki:Tutorials/k0SDR/Tutorial12

MacSwitch (Obsolete)

Table of Contents

  1. SDR Tutorials
    1. Working with USRP2 - Universal Software Radio Peripheral
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Usage
      5. Capture waveform and record to file & add time-domain plot of waveform
      6. Troubleshooting
    1. Simple radio example with GNURADIO benchmark scripts
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Running GNU Radio benchmark scripts
      5. Outputs from transmitter and receiver
      6. Troubleshooting
    1. Simple radio example with GNURADIO benchmark scripts (OEDL)
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Running OEDL script and viewing results
      5. OEDL script
    1. OFDM radio example with GNURADIO benchmark scripts
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Running OEDL script
    1. Spectrum sensing with USRP2 and wiserd
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Generate signal source file using octave
      5. Set up transmitting node
      6. Set up receiving node(s)
    1. Spectrum sensing with USRP2 and wiserd (OEDL and OML)
      1. Description
      2. Hardware / Software Resources utilized
      3. Transmit predefined tone
      4. Record spectrum data to an OML file
      5. Performing the experiment using OEDL
    1. Transmitting wideband signals using USRP X310 and wiserd
      1. Description
      2. Transmitting a signal using wiserd
      3. Creating the signal
    1. Running DSC match script from the grid console
    1. Working with GNURadio and Nutaq ZeptoSDR
      1. Description
      2. Set up
      3. Run the GRC scripts
    1. Realtek 2832 EZCap - A Frugal SDR
      1. Prereqs
      2. A cheap spectrum analyzer
    1. MacSwitch (Obsolete)
      1. Prerequisites
      2. Start Mac Switch
    1. Zynq-based WISER platform - Start-up test
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Loading the Zedboard
      5. Running a start up test
    1. Zynq-based WISER platform - Spectrum Sensing
      1. Description
      2. Hardware / Software Resources utilized
      3. Set up
      4. Start spectrum sensing
    1. Zynq-based WISER platform - Spectrum sensing with multiple nodes (OEDL)
      1. Description
      2. Hardware / Software Resources utilized
      3. Spectrum sensing with an OEDL script
    1. Zynq-based WISER platform - Building the Firmware
      1. Description
      2. Getting the FPGA source code
      3. Building the FPGA design
      4. Building ARM core software
    1. Nutaq - PicoSDR start-up and configuration
      1. Description
      2. Set up
      3. Launch demo scripts
    1. Multi channel sample collection with x310
      1. Description
      2. Set up
      3. Collect samples
    1. Getting started with RFNoC X310
      1. Description
      2. Set up
      3. Find USRP X310s
      4. Program the FPGA
    1. Multi Channel Sample Processing & Visualization
      1. Hardware / software resources utilized
      2. Receive multi channel signal for processing and plotting
      3. Transmit a signal using a single usrp
    2. Plot the IQ Constellation of received signal
      1. Multi-channel Uhd STreamer (MUST)
      2. Description
      3. How it works (without going into the source-code :-D
      4. Source code & compilation
      5. Hardware interface application
      6. XML file
      7. Command server
      8. Usage Example
      9. Signal handler applications
      10. Tutorials
    1. Using two RFNoC streams simultaneously on a single USRP device
      1. Description
      2. Set Up
      3. Running the Simulation
    1. Using 2 transmit or 2 receive antennas simultaneously
      1. Description
      2. Set Up
      3. Running the Experiment
    1. Generate random transmissions emulating Primary Transmitters
      1. Description
      2. Set Up
      3. Running the Experiment

This tutorial is to show an interesting application on GNU Radio in Orbit Testbed. The considerable flexibility provided by GNU Radio gives us an idea to implement the MAC protocols adaption — TDMA/CSMA Switch. With dual-radio structure of each Orbit node, we implement control channel on WiFi? radio to distribute control messages and data channel on GNU Radio to transmit data packets only.

Prerequisites

Before you jump into this tutorial, you should have a clear picture on what GNU Radio is and how Orbit testbed works. A recommended document is GNU Radio Document in Orbit http://www.orbit-lab.org/wiki/Documentation/GNURadio. Besides, GNU Radio nodes in Orbit have different types of daughter boards which operate at different frequency ranges. Be aware of the nodes' configurations (http://www.winlab.rutgers.edu/~therom/research.htm) before starting your experiments.

Start Mac Switch

Step 1: Image the nodes

imageNodes [[1,19],[1,2],[20,19],[20,2],[10,11]] therom_gnu_demo3.ndz

Step 2: Power up and log in to the nodes

Step 3: Setup control channel wireless interface

If Atheros wireless card:

                              wlanconfig athx destroy (Destroy the VAP, athx)

                              wlanconfig athx create wlandev wifi0 wlanmode adhoc (Create an adhoc VAP)

                              iwconfig athx essid test

                              iwconfig athx freq 2.412G rate 11M

                              ifconfig athx 192.168.200.x

If Intel wireless card:

                              iwconfig ethx mode ad-hoc
                             
                              iwconfig ethx essid test

                              iwconfig athx freq 2.412G rate 11M

                              ifconfig athx 192.168.200.x

Make sure the control interfaces are setting up correctly by pinging each other

Step 4: Setup TDMA time synchronization server at node (10,11) by executing

 python TDMA_server.py

Step 5: Execute the file

python ctrlplane_switch3_UDP_pkt500.py

(1). Please Input Network Interface:

Please enter the related control wireless interface to this node

(2). If join the network, please press 1:

If you want to let this node join the network, press 1 and then the node will start to send beacons

(3). If sending packet, please press 1: (Define the transmitter by pressing 1)

Please Input destination address: (Define the receiver's control plane IP address)

The data transmission starts and the transmitter will do MAC switch if the throughput drops 20% in the 3 seconds interval.

Last modified 2 years ago Last modified on 06/12/15 12:39:30