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Heterogeneous wireless sensor networks provide endless opportunities due to their extendable capabilities such as different computing power and sensing range, but at the same time pose formidable challenges, because of the fact that energy is a scarce and usually non-renewable resources. Deployment of sensor nodes in a sensor network is a critical task as deployment should be optimum to increase network...
Data aggregation is a crucial technique for energy constrained sensor networks. Previous researches on data aggregation are featured as query-oriented, which only provide partial information of the event happened in the deployment area at the base station. In this paper, we propose an event-oriented data aggregation approach, called EDA. EDA presents the distributed algorithm by exploiting Cloud Membership...
In this paper, we model a novel topology for cluster-based wireless sensor networks (MforW). Numerical simulations indicate that MforW has scale-free properties. Scale-free networks are inherently robust and efficient. By using the concept of network efficiency, we investigate the effect of attacks on the network. We find that MforW provides fault tolerance and avoids the effect of cluster head failures...
Identifying sensor holes is one of the important subjects in wireless sensor networks. Holes happen when one or more sensors are not functioning or few sensors are missing during deployment in any designated area. The presence of holes hinders the information flow in sensor networks. Different coverage models are developed and very few or no attempt was made to detect the sensor holes using game models...
Wireless sensor networks are becoming increasingly popular, as their usage is extended to a wide range of applications. Security plays a pivotal role in wireless sensor networks, as the data handled by the network are often sensitive. Since the network is vulnerable to various types of attacks there is a need to build efficient security services in them for secure data communication. The processing...
As wireless sensor networks are equipped with sensor nodes which have a limited energy and sensing capabilities, a good routing protocol must be designed to make the network energy efficient. In this paper, we propose a centralized routing protocol called Central Base Station Controlled Density Aware Clustering Protocol (CBCDACP) where the base station centrally performs the cluster formation task...
Hexagon is an ideal shape for clustering sensor networks, for it can seamlessly divide clustered areas, and is the largest regular polygon (in terms of the number of sides) that has this property. In this paper, we analyze the benefit of subdividing a hexagonal cluster for the purpose of reducing the overall power consumption in the cluster. Assuming a spatial Poisson distribution of sensor nodes...
Clustering is an effective approach for managing nodes in wireless sensor networks (WSN). In this paper, we consider selfish avoidance clustering in WSN. A differential game model is proposed to stimulate forwarding. Based on the payoff value of the differential game, called forwarding contribution (FC) in this paper, a centralized clustering algorithm is proposed. Mathematical proof shows that our...
This paper studies how to increase availability and survivability of WSN by selecting a suitable cluster head. For this purpose, we propose a relative distance based clustering scheme (RDCS), to promote the efficiency of energy utilization. In RDCS, both the relative distance and the residual energy are taken into consideration for cluster head selection. Simulation results show that RDCS has better...
In wireless sensor networks, sensor nodes have limited power so the lifetime of the networks is very important design factor. The chain-based routing scheme is one of the famous routing schemes that are proposed for reducing energy dissipation of communication in the networks. The chain-based routing schemes construct the chains for routing path. The chain-based routing schemes can reduce energy dissipation...
Wireless sensor networks are increasingly utilized in large-scale sensing applications. In this paper, we propose a novel wireless sensor network model based on simple assumption of wireless sensor network. The model implies some useful result: the number of parent nodes is determined by communication radius and average distance of sensor nodes; the communication cost caused by multi-path is very...
We present a spatio-temporally adaptive clustering (STACK) protocol for wireless microsensor networks. It takes into account data correlation, both spatial and temporal, using dynamically computed nearness and activity functions. The objective is to uniformly budget energy expenditure over space and time. All three forms of energy expenditure, namely transmission, reception and computation are considered...
Monitoring and control of systems using a wireless sensor network (WSN) play a significant role in rapid automated response to events. Automation drives the necessity to check the system correctness due to the critical nature of the operations (i.e. military, air traffic management). The motes in a WSN are event-driven systems. The evolution of the system can be captured by discrete and continuous...
Many works have been devoted to connectivity of wireless sensor networks. This is an important feature for wireless sensor networks (WSNs) to provide the nodes with the capability of communicating with one or several sinks.To operate successfully a sensor network must also provide satisfactory connectivity so that nodes can communicate for data fusion and reporting to base stations. Connectivity affects...
Biological systems exhibit remarkable adaptation and robustness in the face of widely changing environments. Currently speaking, we often imitate the properties of biological systems. Based on this thought, it also exists the analogous situation in the WSNs (wireless sensor networks). Survivability is the ability to provide essential services in the presence of attacks and failures, and recover full...
Node join authentication and pair-wise key establishment are essential services to provide confidentiality and authentication to the data communication between any two nodes in a network. Since wireless sensor networks are equipped with resource constrained nodes and therefore energy efficient protocol design is required to provide long network life, we have made an analysis of communication overhead...
In wireless sensor networks, scheduling of mobile element has been an important issue because the data sensed by the sensor node has to be collected by this mobile element so that no data loss occurs. Each sensor node senses the data and collects it in a buffer. A deadline is assigned to each sensor node which implies that after the deadline the buffer will overflow which leads to data loss. Since...
This article studys the reliability of communication of single hop link between neighboring nodes. To research the integrality of flooding routing, a mathematical model is built by means of Markov chain and possibility, then we provide an algorithm for reliability of a whole wireless sensor network via the theoretical deduction. It solves the problem of forecasting reliability of communications of...
Wireless sensor networks are generally deployed in hostile environment so the security service is the essential part of wireless sensor networks. To achieve the security service, key management is the fundamental one. Many key management schemes have been proposed considering the characteristics of sensor nodes. Despite the advances of key management techniques, wireless sensor networks still have...
Recently there has been an influx of work on extending a wireless sensor networks lifetime by distributing source compression and deploying non-homogeneous nodes to handle the aggregation. Both of these mechanisms have been shown to increase the network's lifetime, but they each have requirements that might not be plausible. With distributed source compression, message distributions must be known...
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