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Wireless technologies in industrial automation increase flexibility, but pose challenges to the design of security strategies. The typical requirements regarding integrity protection, authentication, and availability need to be transferred from the traditional wired network domain to wireless networks without impairing the benefits of wireless communication. This article presents results of the security...
A cluster-based routing scheme for wireless sensor networks featuring adjustable cluster size is proposed in this article. Aimed at the reduction of power consumption, the proposed scheme is designed to adjust cluster sizes on the fly such that communication loads can be evenly shared by individual nodes, and consequently extend the lifetime of an entire sensor network. In the proposed scheme, named...
The paper proposes Markov models for the reliability analysis of the wireless sensor networks. There are presented the theoretical aspects and some of the variables that are used in the domain of fault tolerant systems. There is also presented a comparison between systems using dedicated replacements and universal replacements for defective nodes. There has been conducted a study regarding the reliability...
Wireless sensor networks consist of a number of small wireless sensor nodes which take measurements and transmit them over wireless links. As wireless sensors are resource constrained, the usage of energy and memory must be done wisely to increase the lifetime of nodes. It is also necessary to deliver data reliably to make any application more useful to the end user. A reliable and lightweight routing...
In many wireless sensor network applications have a demand for high reliability transmission, in view of this need to design and achieve a reliable multi-path routing (RMR) protocol is a suitable application for wireless sensor network. In the trunk path failure through the path of transmission of data backup methods, the routing protocol improves reliability of data transmissions by the agreement...
Cluster-based LEACH routing protocol has the good adaptability for large-scale wireless sensor network, but the existing algorithms may improve the network lifetime through adjusting the threshold, which could make the number of cluster-heads in one certain area more or less, due to ignoring the number of cluster-heads in the process of cluster-heads decision. An optimal cluster-heads algorithm in...
Reliability and validity have always been the most important criteria in micro-satellite designing. Beside this, other important factors such as miniaturization, fault tolerance, data rate, redundancy and power consumption should also be fulfilled by satellite systems. The limitation to reliability and redundancy is the interdependent links of subsystem and wiring harness and connectors. The physical...
Faulty sensor data undermine the usability and reliability of sensor networks. Distributed automatous faulty sensor detection is a critical component of a self-managed and sustainable sensor network. In this paper, we present a new distribution-based optimization approach for distributed faulty data detection. We propose a new statistical measurement mutual divergence as the optimization objective...
We consider optimal resource allocation for wireless video sensors (WVSs), including the image sensor subsystem into the system analysis. By assigning a power-rate-distortion (P- R-D) characteristic for the image sensor, we build a comprehensive P-R-D framework for WVS optimization. Within the scope of the developed framework, we solve the problem of how to allocate power among the image sensor, compression,...
Wireless sensor network is a new information acquisition and processing technology, which is widely used in monitoring systems. Taking into account that the physical topology of the mine is relatively fixed, as well as that the energy can be added to the mobile nodes, in this paper we propose an energy-efficient wireless sensor network routing algorithm to adapt to the mine environment. Demonstrated...
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...
Wireless sensor networks (WSNs) is composed of sink and many sensor nodes. It has the great scope to monitor environment and the characteristics of wireless communications. Relatively, the advantages of sensor node bring themselves some restrictions. The greatest challenge among those is the constraints on energy. The most critical issue is how to minimize the energy consumption for keeping target...
Wireless transmission module PTR6000M based on nRF24L01 module constitutes the wireless network with multi-way data synchronization testing in the rugged electromagnetic environment of the armored vehicles characteristic parameter testing. This program is successfully used in real vehicle testing, providing a reliable information source for running armored vehicles monitoring, security and optimal...
Traditional end-to-end approaches used for provision of reliable data transfer are not able to be suit for the changeful wireless environment well. In this paper we present an efficient reliable data transfer scheme using network coding in wireless sensor network. The scheme is to guarantee the reliability in data transmission, to add redundancy data as less as possible. The simulation results demonstrate...
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...
This paper focus on the survivability of wireless sensor networks (WSNs). We develop a model to evaluate the tradeoffs between the cost of defense mechanisms for wireless sensor network and the resulting expected survivability after a network attack. The model consists of three parts. The first part simulates the occurrence of attacks or incidents. The second part simulates the impact of an attack...
This paper proposes an application oriented four layered quality of service (QoS) stack for wireless sensor networks (WSN), including a supporting system architecture for interacting with WSNs using the MPEG-21 multimedia framework in an medical application setting. The application of the WSNs is signal processing algorithms reporting elaborated observed sensor data to external users. The QoS model...
In wireless sensor networks, the data-centric sensing task focuses more on the data reliability. In this paper, a reliable clustering algorithm RCVC (reliable clustering using virtual cluster-head) is proposed. It provides multipath for nodes in the network by using a set of redundant cluster-heads which are marked with a unique virtual identification. When the active cluster-heads fail, according...
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...
Graph routing is proposed in wireless HART communication foundation, but the implementing of the algorithm is not specified. This paper proposes a graph routing mechanism termed ELHFR (exhenced least-hop first routing) that exploits the mesh topology and application characteristics of wireless HART. ELHFR defines the network topology as a connected graph then generates the sub-graph that includes...
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