annual conference of ita - university of california, los...
TRANSCRIPT
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