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This paper presents an approach describing transmit power controlled clusters for Heterogeneous Sensor Networks (HSNs). There are two types of nodes in the network: the low-end and high-end nodes. The objective is to set a threshold limit of transmit power for low end nodes for the intra-cluster communication, and also set a limit for high end nodes for inter-cluster communication. We have tested...
Clustering is one of the basic approaches for designing energy-efficient and scalable distributed sensor networks. HEED is a well known energy efficient clustering protocol. In this protocol, the message overhead is low and cluster heads are distributed fairly across the network. Our distributed clustering protocol, HEED*, improves HEED protocol to achieve energy efficiency with three techniques:...
Among many issues to be considered in designing an ad hoc wireless sensor network the key issue that stands out is to employ an efficient weighted topology discovery algorithm based upon certain node parameters. In the paper, we have described an algorithm for weighted topology discovery which uses colors based approach to partition the network in to clusters. Each cluster has a clusterhead. The nodes...
Clustering and aggregation inherently increase wireless sensor network (WSN) lifetime by collecting information within a cluster at a cluster head, reducing the amount of data through computation, then forwarding it. Traditional approaches, however, both spend extensive communication energy to identify the cluster heads and are inflexible to network dynamics such as those arising from sink mobility,...
Clustering allows for data aggregation which reduces congestion and energy consumption. Recent study in battery technology reveals that batteries tend to discharge more power than needed and reimburse the over-discharged power if they are recovered. In this paper, we first provide an online mathematical battery model suitable for implementation in sensor networks. Using our battery model, we propose...
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