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The next generation of Wireless Sensor Networks (WSNs) will need to be sustainable in the field. Sustainability presents a number of management difficulties. Among these challenges is field programmability. Future WSNs will consist of nodes with different architectures, capabilities, and operating systems. Current solutions for reprogramming WSNs either require homogenous networks or substantial overhead...
Run-time debugging tools are required to detect and diagnose post-deployment failures in wireless sensor networks. Reproducing a failure from the trace of past events can play a crucial role in diagnosis. We describe TinyTracer, an efficient interprocedural control-flow tracing tool that generates the trace of all interleaving concurrent events as well as the control-flow paths taken. TinyTracer enables...
As many experimental simulations were conducted in the field of wireless sensor networks, OMNeT++ has gained popularity due its scalability and rich graphical user interface. The use of OMNeTT++ based simulation for reliable point-to-point wireless transmission and realistic Segmentation and Reassembly (SAR) with error control for a distributed wireless sensor network are explored. Simulations demonstrated...
As for the extremely unpredictable factors of Wireless Sensor Networks (WSN) with constrained resources operating in an unattended mode in uncertain dynamic environments. The distribution optimization and behavior evaluation of sensor-network nodes is vital to reduce the energy consumption and ensure effective information acquisition in distributions sensor network (DSN). Because of Bayesian probability...
To improve communication reliability and protocols'portability on the nodes of wireless sensor network and ease the development difficulty, a new system design scheme based on the embedded operating system μC/OS-II is proposed in this paper. According to operating system modular design strategy, the way of task partitioning for network protocol stack is present and the operating system is transplanted...
Some of the main challenges that Wireless Sensor Networks (WSNs) face are reliability, flexibility and security. When WSNs deployed in remote locations need to be reprogrammed, environmental conditions often make it impossible to physically retrieve them. Over the Air Programming (OAP) plays an important role in achieving this task. Several platform dependent protocols have been developed for OAP...
The sensor networks is a network technique for the implementation of Ubiquitous computing environment. It is wireless network environment that consists of the many devices, called the sensor node, which have miniature computing device, small memory space and very limited battery power. Though sensor network provides various capabilities, it is unable to ensure the secure authentication between sensor...
We present a novel mechanism for consensus building in sensor networks. The proposed algorithm has three main properties that make it suitable for sensor network learning. First, the proposed algorithm is based on robust nonparametric statistics and thereby needs little prior knowledge about the network and the function that needs to be estimated. Second, the algorithm uses only local information...
Large-scale wireless sensor networks must be reliable, since they are intended to be operated without human intervention. Using well-understood building-blocks is one method of increasing confidence in the reliability of a sensor network design. In this paper, we use model-checking to analyze and characterize the flooding time synchronization protocol, a synchronization protocol that is distributed...
The main purpose of wireless sensor networks (WSNs) is to obtain information about their environment. However, WSNs often produce imprecise and incorrect sensor data, e.g. because of sensor failure or unreliable radio communication. We propose a system for WSN applications that allows to assess the quality of sensor data and further allows to fuse data based on their estimated quality. Our system...
Wireless sensor networks (WSNs) consist of small nodes with sensing, computation, and wireless communication capabilities. A number of routing algorithms based on learning automata technique have been proposed for communication networks. However, there has been little work on the effects of cellular learning automata on the performance of these algorithms. One approach to prolong lifetime of sensor...
The development of a wireless sensor network (WSN) gateway is challenging for sites where limited infrastructures lead to frequent power shortages and and network unreliability. In this paper we presents a low-power, low-cost, 802.15.4 and 802.11 compatible solution which uses open source software to meet local conditions. Using the SunSPOT motes on a system which is mostly platform independent, our...
In this paper, we describe a reliability model which can be used to analyze the performance and power consumption in resource constrained, data rate scarce, mobile agent-based wireless sensor network (WSN) systems. The primary model is referred to as a generalize access structure congestion (GGC) system which is an extended model from a circular sequential k-out-of-n congestion (CSknC). There are...
The lossy nature of wireless communication leads to many challenges while designing multihop networks. As an integral part of reliable communication in wireless networks, effective link estimation is essential for routing protocols. Recent studies have shown that link reliability-based metrics like ETX have better performance than traditional metrics such as hop count or latency. Usually, such metrics...
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,...
Embedded wireless networks have largely focused on open loop sensing and monitoring. To address actuation in closed loop wireless control systems there is a strong need to re-think the communication architectures and protocols for reliability, coordination and control. As the links, nodes and topology of wireless systems are inherently unreliable, such time-critical and safety-critical applications...
The evaluation on the transmission reliability is important for the design and optimization of wireless sensor networks (WSNs). In this paper, an approach, which is aimed at the high reliability oriented multi-path transmission in WSN, is proposed to compute and analyze both transmission reliability and average message delay. In this method, the multiple paths between the source and the sink are mapped...
Wireless sensor networks are generally deployed in remote areas where no infrastructure is available. This imposes the use of battery operated devices which seriously limits the lifetime of the network. In this paper we present a cluster-based routing algorithm which is based on Fuzzy-ART neural networks to maximize the life span of such networks. Results show that the energy saving obtained improves...
Cooperative communications have been demonstrated to be effective in combating the multiple fading effects in wireless networks, and improving the network performance in terms of adaptivity, reliability, data throughput and network life time. In this paper, we investigate the use of cooperative communications for quality of service (QoS) provisioning in resource-constrained wireless sensor networks,...
In this paper we propose a swarm intelligence based energy balance routing scheme SEB. SEB addresses the routing problem, especially focuses on extending the lifetime of wireless sensor networks, in which sensor nodes are battery powered. Based on the assumptions in our model, SEB estimates the weights of sensor nodes dynamically. Furthermore, sensor nodes exchange information (i.e., residual energy...
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