Data-gathering wireless sensor networks: organization and capacity
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: Wireless sensor networks
A system for simulation, emulation, and deployment of heterogeneous sensor networks
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
A Minimum Cost Heterogeneous Sensor Network with a Lifetime Constraint
IEEE Transactions on Mobile Computing
Random Coverage with Guaranteed Connectivity: Joint Scheduling for Wireless Sensor Networks
IEEE Transactions on Parallel and Distributed Systems
The capacity of wireless networks
IEEE Transactions on Information Theory
Gossip-based density estimation in dynamic heterogeneous wireless sensor networks
International Journal of Autonomous and Adaptive Communications Systems
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To achieve better performance, we adopt a Heterogeneous Sensor Network (HSN) model. In many applications, the locations of some sensor nodes are controllable. In this paper, first we propose a novel density-varying deployment scheme for high-end sensors (H-sensors) in an HSN. The scheme solves the bottleneck problem in typical many-to-one sensor networks. We then study the optimal placement of H-sensors whose locations are controllable. The goal is to use the minimum number of H-sensors for ensuring successful data delivery, coverage and connectivity in a network for a given lifetime. We present an effective H-sensor placement scheme that can simultaneously achieve coverage, connectivity and data relay requirements while uses a small number of H-sensors. Both theoretical proofs and simulation results demonstrate that the proposed H-sensor placement scheme achieves very good performance.