172 search results - page 28 / 35 » Improved Approximation Algorithms for Maximum Lifetime Probl... |
INFOCOM
2007
IEEE
14 years 1 months ago
2007
IEEE
— Existing work on placing additional relay nodes in wireless sensor networks to improve network connectivity typically assumes homogeneous wireless sensor nodes with an identica...
MOBIHOC
2009
ACM
14 years 8 months ago
2009
ACM
Cognitive radio networks are emerging as a promising technology for the efficient use of radio spectrum. In these networks, there are two categories of networks on different chann...
VTC
2008
IEEE
14 years 1 months ago
2008
IEEE
This paper considers the problem of selecting a subset of nodes in a two-hop wireless network to act as relays in aiding the communication between the source-destination pair. Opt...
MASS
2010
13 years 5 months ago
2010
Cognitive radio, which enables dynamic access of under-utilized licensed spectrums, is a promising technology for more efficient spectrum utilization. Since cognitive radio enables...
INFOCOM
2009
IEEE
14 years 2 months ago
2009
IEEE
—The emerging wireless relay networks (WRNs) are expected to provide significant improvement on throughput and extension of coverage area for next-generation wireless systems. W...