uTupleSpace: A Bi-Directional Shared Data Space for Wide-Area Sensor Network

Author(s):  
Takayuki Nakamura ◽  
Motonori Nakamura ◽  
Atsushi Yamamoto ◽  
Keiichiro Kashiwagi ◽  
Yutaka Arakawa ◽  
...  
Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3884 ◽  
Author(s):  
Hongxian Tian ◽  
Mary Weitnauer ◽  
Gedeon Nyengele

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.


2008 ◽  
Vol 46 (12) ◽  
pp. 112-120 ◽  
Author(s):  
Hiroshi Saito ◽  
Osamu Kagami ◽  
Masahiro Umehira ◽  
Yuichi Kado

2011 ◽  
Vol 50 (11R) ◽  
pp. 112501 ◽  
Author(s):  
Yosuke Tanaka ◽  
Masahiro Kinoshita ◽  
Akiko Takahashi ◽  
Takashi Kurokawa

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