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The key features of computer networks available for a disaster situation are reliable, fault tolerance, and self-configurable. Therefore, using a wireless mesh network for disaster prevention and recovery system has gained much attention from the research community in the last decades. In addition, from the practical aspects of the network infrastructures of the disaster system, we should assume the core capabilities such as wireless connectivity in a wide range, ease of use, and low cost so on. In this paper, we propose an interface mode assignment method for reconstructing a route from an isolated router to a gateway (GW) router in a wireless mesh network based on IEEE 802.11 infrastructure mode after a disaster occurrence. The proposed method assigns an adequate mode to each interface in an isolated router to recover the network reachability in a distributed manner. Simulation results show the effectiveness of the proposed method via two different scenarios.

Computer networks comprise essential infrastructure in modern society and must function even in a disaster situation. Therefore, fault-tolerant networks are being actively studied. Disaster information systems, however, suffer from two main issues: lack of their utilization in peacetime and the difficulty for a non-expert to manage them should a disaster strike. Therefore, we place special emphasis on the development of a reliable network infrastructure that can function during both normal and disaster times, using a Wi-Fi-based wireless mesh network. In a large-scale disaster situation, our goal is to identify a way to reconstruct the mesh network by adding the minimum number of spare access points (APs) to ensure the reachability of all mesh routers to the backbone network. Furthermore, we consider that only public workers without any experience with wireless communication technologies must decide upon the adequate locations for spare APs and install them. Both of simulation experiments and field trial prove the effectiveness of the proposed methods.

Computer networks comprise essential infrastructure in modern society and must function even in a disaster situation. Therefore, fault-tolerant networks are being actively studied. Disaster information systems, however, suffer from two main issues: lack of their utilization in peacetime and the difficulty for a non-expert to manage them should a disaster strike. Therefore, we place special emphasis on the development of a reliable network infrastructure that can function during both normal and disaster times, using a Wi-Fi-based wireless mesh network. In a large-scale disaster situation, our goal is to identify a way to reconstruct the mesh network by adding the minimum number of spare access points (APs) to ensure the reachability of all mesh routers to the backbone network. Furthermore, we consider that only public workers without any experience with wireless communication technologies must decide upon the adequate locations for spare APs and install them. Both of simulation experiments and field trial prove the effectiveness of the proposed methods.