Optimal Wireless Network Restoration under Jamming Attack

Built upon a shared wireless medium, wireless network is particularly vulnerable to jamming attacks. The ability to recover from attacks and maintain an acceptable level of service degradation is a crucial aspect in the design of a wireless network. This paper investigates the network restoration solutions via joint traffic rerouting and channel re-assignment. In particular, we consider two strategies, namely global restoration and local restoration, which can support a range of tradeoffs between the restoration latency and network throughput after restoration. To quantitatively evaluate the impact of jamming attacks during and after restoration, we define two performance degradation indices, transient disruption index (TDI) and throughput degradation index (THI). We formulate the optimal network restoration schemes under these two strategies as linear programming problems and perform extensive performance evaluations to study the impact of various jamming scenarios in a multi-hop multi-channel wireless network.