Wide area sensor network for disaster prevention and monitoring: Concept and service coverage

2014 ◽  
Author(s):  
Yongnu Jin ◽  
Kyung Sup Kwak ◽  
Masakazu Sengoku ◽  
Shoji Shinoda
Keyword(s):  
Sensor Network ◽  
Wide Area ◽  
Disaster Prevention ◽  
Service Coverage

scholarly journals Optimized Gateway Placement for Interference Cancellation in Transmit-Only LPWA Networks

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3884 ◽  
Author(s):  
Hongxian Tian ◽  
Mary Weitnauer ◽  
Gedeon Nyengele
Keyword(s):  
Low Power ◽  
Sensor Network ◽  
Interference Cancellation ◽  
Greedy Algorithms ◽  
Sensor Nodes ◽  
Wide Area ◽  
Delivery Ratio ◽  
Large Network ◽  
Packet Delivery ◽  
Simulation Results

We study the placement of gateways in a low-power wide-area sensor network, when the gateways perform interference cancellation and when the model of the residual error of interference cancellation is proportional to the power of the packet being canceled. For the case of two sensor nodes sending packets that collide, by which we mean overlap in time, we deduce a symmetric two-crescent region wherein a gateway can decode both collided packets. For a large network of many sensors and multiple gateways, we propose two greedy algorithms to optimize the locations of the gateways. Simulation results show that the gateway placements by our algorithms achieve lower average contention, which means higher packet delivery ratio in the same conditions, than when gateways are naively placed, for several area distributions of sensors.

Wide area ubiquitous network: the network operator's view of a sensor network

2008 ◽  
Vol 46 (12) ◽  
pp. 112-120 ◽  
Author(s):  
Hiroshi Saito ◽  
Osamu Kagami ◽  
Masahiro Umehira ◽  
Yuichi Kado
Keyword(s):  
Sensor Network ◽  
Wide Area ◽  
Ubiquitous Network

A Wide-Area Sensor Network Based on Fiber Optic Power Supply

2011 ◽  
Vol 50 (11R) ◽  
pp. 112501 ◽  
Author(s):  
Yosuke Tanaka ◽  
Masahiro Kinoshita ◽  
Akiko Takahashi ◽  
Takashi Kurokawa
Keyword(s):  
Sensor Network ◽  
Power Supply ◽  
Fiber Optic ◽  
Wide Area

Development of the Wide-Area Earthquake Damage Estimation System and Mashup of Disaster Prevention Information

2017 ◽  
Vol 12 (1) ◽  
pp. 118-130
Author(s):  
Masafumi Hosokawa ◽  
◽  
Ken-ichi Takanashi ◽  
Shoji Doshida ◽  
Makoto Endo ◽  
...  
Keyword(s):  
Disaster Response ◽  
Initial Response ◽  
Earthquake Damage ◽  
Wide Area ◽  
Disaster Prevention ◽  
Damage Estimation ◽  
Web Based ◽  
Management Personnel ◽  
Estimation System ◽  
Communication Lines

Immediately following an earthquake or other disaster, the crisis management personnel of the national or local government must determine the location of the disaster and its status and quickly carry out response actions such as rescue or fire-fighting operations. However, the congestion of communication lines and shortage of disaster response personnel make it impossible to collate the damage information in the initial response mobilization period immediately following an earthquake, making it difficult to make proper decisions. To assist the decision-making immediately following an earthquake, we developed a Wide-area Earthquake Damage Estimation System, which estimates the earthquake damage based on information from the Meteorological Agency and other agencies and shares the results via email and WebGIS (Web-based Geographic Information System) portal functions. In this paper, we introduce this system and discuss the results of the trial operation.

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