Abstract
When Disaster Information Network System is considered in local areas that were heavy damaged by the East Japan Great Earthquake in 2011, the resiliency of the network system is one of significant subjects for the restoration of the areas. DTN (Delay Tolerant Network) has been focused for the effective methods for such inoperable network circumstances. However, when DTN is applied for the local areas, there are some problems such as message delivery rate and latency because there are fewer roads, cars, and pedestrians than in urban areas. In this paper, we propose the Enhanced Media Coordinate System for its architecture, and Data Triage method by emergent user policies is introduced to improve the QoS in Disaster Information Network System in local areas. In the proposed method, every message is tagged with the priority levels by data types with considering emergent user policies, and the high priority messages are firstly duplicated to transmittable nodes. Then, the experimental results by the GIS map of a Japanese coastal town and the future studies are discussed.
Highlights
Over two years have already passed since the East Japan Great Earthquake in 2011, many damaged Japanese coastal cities still have many problems for the restoration
The results show that the Data Triage Method is effective than other Delay Tolerant Networking (DTN) protocols in local areas, and it is discussed for the future studies of DTN usages for Disaster Information Network System in local areas
When Disaster Information Network System is considered in local areas that were heavy damaged by the East Japan Great Earthquake, the resiliency of the network system became one of significant subjects for the restoration of the areas
Summary
Over two years have already passed since the East Japan Great Earthquake in 2011, many damaged Japanese coastal cities still have many problems for the restoration. Since the Satellite and the amateur radio networks have the QoS (Quality of Service) problems such as throughput or jitter, NDN cognitively selects the proper wireless links and routes by the extend AHP (Analytic Hierarchy Process) method and the AODV (Ad hoc On-Demand Distance Vector) with Min-Max AHP values This method is suitable for the fixed station such as disaster headquarters or evacuation shelters. The previous papers [3,4,5] pointed out the data transmission efficiency about DTN, and they proposed different types of DTN protocols such as the Spray and Wait, MaxProp, and PROPHET in order to improve the delivery rate and latency of transmission data When it is considered DTN in local cities that are severely damaged by the East Japan Great Earthquake, the efficiency of DTN is supposed to be worse than that of the urban area because the transmittable nodes such as cars or pedestrians are fewer. The results show that the Data Triage Method is effective than other DTN protocols in local areas, and it is discussed for the future studies of DTN usages for Disaster Information Network System in local areas
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