Adaptive forwarding rate control for network coding in tactical manets

In this paper, we propose a novel packet forwarding scheme based on network coding that is resilient to jamming attack in a tactical area. Wireless communication is necessary in a battlefield, but it is fragile to jamming attacks from an adversary because of the wireless shared medium. Jamming attack is easily achieved by emitting continuous radio signals and it can interfere with other radio communications. Channel switching over multiple channels or route detouring have been proposed to restore communication from jamming attacks, but they require a special radio system or knowledge of the network topology. Our new scheme exploits packet redundancy of network coding. It dynamically changes the level of redundancy adapting to local jamming conditions and thus injects redundant encoded packets when and where a jamming attack occurs. In absence of jamming, it decreases forwarding rate to save resources so that our protocol efficiently manages the network resources. We provide performance evaluations of resiliency and efficiency of the new scheme via simulation study.