Annual Conference of ITA ACITA 2009 Soon Y. Oh and Mario Gerla, Computer Science Department, University of California, Los Angeles Motivation: Jamming Attack in Tactical Field • Jamming Attack via shared medium • Emitting radio signal • Disturbing wireless communication • Existing solutions • Channel switching Î Require a special radio system • Detouring Î Require knowledge of the topology • Our Solution • Injecting packet redundancy using network coding Dynamic Forwarding Rate Control in Network Coding • Random linear network coding • Forwarding rate control at intermediate nodes • Based on channel condition • Using a passive ACK to detect channel condition • Recording rank at the packet header • Indicating the number of received packets • Adjusting the forwarding rate based on the received rank from down-stream nodes • Linearly increase and decrease Simulation Results Future Work Forwarding rate (the number of forwarded packet) changing under random jamming. We choose 2 nodes in the network (near jamming area) and grey area is jamming period. Packet delivery ratio of adaptive forwarding and fixed forwarding rate of network coding in random topology under random jamming. One source with ten receivers and 20m/s maximum node speed. • Developing an algorithm distinguishing jamming attack and congestion • Implementation and experiments • Application development Adaptive Forwarding Rate Control For Network Coding in the Tactical MANET

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Annual Conference of ITAACITA 2009

Soon Y. Oh and Mario Gerla, Computer Science Department, University of California, Los Angeles

Motivation: Jamming Attack in Tactical Field

• Jamming Attack via shared medium• Emitting radio signal• Disturbing wireless communication

• Existing solutions• Channel switching

Require a special radio system• Detouring

Require knowledge of the topology

• Our Solution• Injecting packet redundancy using network coding

Dynamic Forwarding Rate Control in Network Coding

• Random linear network coding• Forwarding rate control at intermediate nodes

• Based on channel condition• Using a passive ACK to detect channel condition

• Recording rank at the packet header• Indicating the number of received packets

• Adjusting the forwarding rate based on the received rank from down-stream nodes

• Linearly increase and decrease

Simulation Results Future Work

Forwarding rate (the number of forwarded packet) changing under random jamming. We choose 2 nodes in the network (near jamming area) and grey area is jamming period.

Packet delivery ratio of adaptive forwarding and fixed forwarding rate of network coding in random topology under random jamming. One source with ten receivers and 20m/s maximum node speed.

• Developing an algorithm distinguishing jamming attack and congestion

• Implementation and experiments

• Application development

Adaptive Forwarding Rate Control For Network Coding in the Tactical MANET