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

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.

Wireless access system for Wide Area Ubiquitous Network

2009 ◽  
Author(s):  
Yoshitaka Shimizu ◽  
Daisei Uchida ◽  
Fusao Nuno ◽  
Shigeru Kuwano ◽  
Shinya Ishihara ◽  
...  
Keyword(s):  
Wireless Access ◽  
Wide Area ◽  
Access System ◽  
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
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