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» Cover Set Problem in Directional Sensor Networks
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COMCOM
2006
150views more  COMCOM 2006»
14 years 9 months ago
Energy-efficient coverage problems in wireless ad-hoc sensor networks
Wireless sensor networks constitute the platform of a broad range of applications related to national security, surveillance, military, health care, and environmental monitoring. ...
Mihaela Cardei, Jie Wu
SECON
2010
IEEE
14 years 7 months ago
Two-Tiered Constrained Relay Node Placement in Wireless Sensor Networks: Efficient Approximations
In a wireless sensor network, short range multihop transmissions are preferred to prolong the network lifetime due to super-linear nature of energy consumption with communication d...
Dejun Yang, Satyajayant Misra, Xi Fang, Guoliang X...
PEWASUN
2005
ACM
15 years 3 months ago
Efficient deafness avoidance in wireless ad hoc and sensor networks with directional antennas
Using directional antennas in wireless ad hoc networks can significantly improve network performance. However, the deafness problem greatly limits the network performance. This pa...
Yihu Li, Ahmed M. Safwat
DCOSS
2008
Springer
14 years 11 months ago
Local PTAS for Independent Set and Vertex Cover in Location Aware Unit Disk Graphs
We present the first local approximation schemes for maximum independent set and minimum vertex cover in unit disk graphs. In the graph model we assume that each node knows its geo...
Andreas Wiese, Evangelos Kranakis
ICASSP
2010
IEEE
14 years 8 months ago
Unidirectional graph-based wavelet transforms for efficient data gathering in sensor networks
We design lifting-based wavelet transforms for any arbitrary communication graph in a wireless sensor network (WSN). Since transmitting raw data bits along the routing trees in WS...
Sunil K. Narang, Godwin Shen, Antonio Ortega