Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Energy-Efficient Communication Protocol for Wireless Microsensor Networks
HICSS '00 Proceedings of the 33rd Hawaii International Conference on System Sciences-Volume 8 - Volume 8
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
Optimal relay assignment for cooperative communications
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
INFOCOM'10 Proceedings of the 29th conference on Information communications
Optimal relay assignment for fairness in wireless cooperative networks
International Journal of Ad Hoc and Ubiquitous Computing
MIMO communications in ad hoc networks
IEEE Transactions on Signal Processing
Semi-Distributed User Relaying Algorithm for Amplify-and-Forward Wireless Relay Networks
IEEE Transactions on Wireless Communications
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
Joint optimization of relay strategies and resource allocations in cooperative cellular networks
IEEE Journal on Selected Areas in Communications
Studying the stochastic capturing of moving intruders by mobile sensors
Computers & Mathematics with Applications
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Cooperative communication has become an efficient technology to improve the spatial diversity. Among this, relay assignment significantly affects power consumption of the entire network. This paper first analyses the relationship between power consumption and the number of relay nodes. Then, we define the relay assignment k-RA problem where k is the maximum number of relay nodes participating into each cooperative transmission pair, and k = 1 or 2. We design an optimal algorithm ESRA to solve the 1-RA problem. The proposed algorithm transforms this problem into bipartite matching, and assigns relay nodes to transmission pairs based on the matching result. Next, a heuristic algorithm ETRA is presented for the 2-RA problem. The theoretical analyses show that ETRA can provide a good approximation of the optimal one. The simulation results show that ESRA and ETRA will decrease the power consumptions about 45.8% and 51.7% compared with direct transmission scheme under many situations.