Approximation schemes for covering and packing problems in image processing and VLSI
Journal of the ACM (JACM)
Next century challenges: scalable coordination in sensor networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
Research challenges in wireless networks of biomedical sensors
Proceedings of the 7th annual international conference on Mobile computing and networking
Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Topology control for wireless sensor networks
Proceedings of the 9th annual international conference on Mobile computing and networking
Mobile backbone networks --: construction and maintenance
Proceedings of the 7th ACM international symposium on Mobile ad hoc networking and computing
Relay Node Placement in Wireless Sensor Networks
IEEE Transactions on Computers
Relay sensor placement in wireless sensor networks
Wireless Networks
Relay node placement in large scale wireless sensor networks
Computer Communications
Constrained relay node placement in wireless sensor networks: formulation and approximations
IEEE/ACM Transactions on Networking (TON)
Fault-tolerant relay node placement in wireless sensor networks
COCOON'05 Proceedings of the 11th annual international conference on Computing and Combinatorics
IEEE Transactions on Mobile Computing
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This paper addresses the relay node placement problem in two-tiered wireless sensor networks with base stations, which aims to deploy a minimum number of relay nodes to achieve certain coverage and connectivity requirement. Under the assumption that the communication range of the sensor nodes is no more than that of the relay node, we present a polynomial time (5+∈)-approximation algorithm for the 1-coverage 1-connected problem. Furthermore, we consider the fault tolerant problem in the network, we present a polynomial time (20+∈)-approximation algorithm for the 2-coverage 2-connected problem, where ∈ is any given positive constant. For the k-coverage 2-connected situation, we present a polynomial time (15k驴10+∈)-approximation algorithm.