1. Network Coding and Reliable Communications Group Experimental Agenda MIT jointly with UCLA and BBN Danail Traskov GEC 11, Denver July 27, 2011

2. Network Coding and Reliable Communications Group Acknowledgements MIT:Muriel Médard, Ali Parandehgheibi, Jason Cloud, Au Teerapittayanon UCLA:Mario Gerla, Giovanni Pau, and students BBN:Abhimanyu Gosain, Hamed Souroush, Harry Mussman Rutgers:Ivan Seskar GENI-PO:Aaron Falk

3. Network Coding and Reliable Communications Group Experiment 1: WiMAX – HARQ/ARQ vs. FEC WiMAX ARQ HARQ Turbo Code + CRC ED RLC MAC PHY Layer Error Control WiMAX architecture Experiment 1a) Disable ARQ and HARQ Measure loss patterns, loss rates, loss variability, link throughput, and RTT Experiment 1b) Network Coding Measure performance with network coding Experiment 1c) Extend baseline scenario to (in- band) relaying with network coding

4. Network Coding and Reliable Communications Group Experiment 2: Heterogeneous Networking General setup: IRIDIUM WiMAX WiFi 56 kbps Modem WiMAX Base Station

5. Network Coding and Reliable Communications Group Lab Vehicle 1 WiFi Mesh WiMax Iridium Vehicle 2 WiFi Vehicle 3 WiFi Vehicle 4 WiFi Example of a configuration: Vehicular network + WiMAX/ Iridium connection WiFi

6. Network Coding and Reliable Communications Group Experiments First Stage: Collect simultaneous traces over WiFi, WiMAX, and IRIDIUM networks to determine packet loss/drop patterns, packet loss rates, and achievable network throughput/transmission rates. Data Collection Method: – Transmit UDP packets from a single source through both the IRIDIUM and WiMAX networks to a single sink. – Transmit UDP packets through a WiFi network from one vehicle to another. – Use either modified iperf, or custom measurement script Second Stage: Evaluate the performance of network coding for the various scenarios – E.g. Coded-TCP (MIT work in progress), CodeTorrent (UCLA)