Affiliations: Department of Informational Society Studies, Saitama
Institute of Technology, Fukaya, Japan | TAC Engineering Co.,LTD.,
Tsushidanishi, Morioka, Iwate, Japan | Faculty of Software and Information Science, Iwate
Prefectural University, Iwate, Japan
Note: [] Corresponding author: Noriki Uchida, Department of Informational
Society Studies, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama
369-2093, Japan. E-mail: uchida@sit.ac.jp
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.
Keywords: Disaster information system, delay tolerant network, QoS
