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Wireless industrial communication systems are increasingly deployed for process automation and sensor/actuator networks with moderate requirements on latency and reliability. Many closed-loop control systems with more challenging latency and reliability requirements would benefit from wireless communication as well and have therefore become a research field of increasing interest in recent year. In...
In most of the systems, data collection is one of the major tasks to be carried out. The way of data collection can be automatic or manual. Adversity is the main cause that in many systems, manual intervention is not possible. So, opting for automated way isn't such bad idea. Depending upon the way of communication, wired or wireless, data can be collected through either wired or wireless networks...
Topology topic has gained additional and special interest in the field of Wireless Sensor Networks (WSN). While WSN deployments are in general optimized by the known fundamental network topology, another trend is to enhance WSN by managing the network topology. Many propositions have been tested in this field, like topology directed routing, cooperating schemes, sensor coverage based topology control...
The nature of wireless sensor networks make them very attractive to attackers. Network layer have ability to swap network service data units between two transport entities above a network connection depending same feature like latency and energy. The network layer deals with directing the information supplied by the transport layer. It is in charge of determining the task of locations and how parcels...
Wireless Sensor Networks (WSN) based on the IEEE 802.15.4 standard are constantly expanding. Applications like production control, building control are more and more based on WSN because of their energy efficiency, self-organizing capacity and protocol flexibility. The IEEE 802.15.4 standard defines 3 network topologies: the mesh topology, the star topology and the Cluster-Tree topology. However,...
With the view to streamlining fault localization process for building operation and maintenance (O&M), a novel architecture for managing decentralized building facilities information is proposed, by exploiting the information interoperability and reusability among Building Information Modelling (BIM), system topology, Radio Frequency Identification (RFID) technology, and real-time data acquisition...
Wireless Sensor and Actor Networks (WSAN) have been very popular from the research community because of their suitability for real time systems. To maintain inter-actor connectivity is crucial in real time situations where actors have to quickly take corrective actions to detected events. Failure of actor and sensors partitions the inter-actor network into disjoint segments, and thus disrupt the network...
In this work, we consider the usage of wireless sensor networks (WSN) to monitor an area of interest, in order to diagnose on real time its state. Each sensor node forwards information about relevant features towards the sink where the data is processed. Nevertheless, energy conservation is a key issue in the design of such networks and once a sensor exhausts its resources, it will be dropped from...
This paper examines various types of networks their characteristics and parameters. It is also looks in current ongoing research on the field of localization and positioning and work related with localization that doesn't take into account the parameter of distance between SRs. Another type of localization is also commented which is the localization in Telemetry. In addition, issues of network coverage...
To evaluate the reliability of WSN whose topology is clustering structure, we model the WSN as a Weighted Voting System (WVS) with unreliable links, and propose an algorithm. The algorithm is based on universal generating function technique, and two composition operators are defined to composite u-functions of member nodes, links and cluster heads. Test results shows that the proposed algorithm can...
The concept of data distribution within cluster of sensor nodes to the source sink has resulted to intense research in Wireless Sensor Networks (WSNs). In this paper, in order to determine the scheduling length of packet distribution, a tree-based network topology is constructed indicating the distribution of various sensor nodes within a specific coverage area (CAi). To evaluate the performance of...
A Hierarchical Weighted Voting System (HWVS) model is established to describe the process of data transmission on the wireless sensor network (WSN) whose topology is cluster. A new definitions about reliability of HWVS is presented. Based on universal generating function technique, an algorithm is suggested for evaluating the reliability of HWVS. The proof that suggested algorithm is applicable to...
In this paper we abandon the intuition that the minimum length/latency schedule of aggregation convergecast has to be constructed in an order mimicking the flow of data, i.e., from leaves to the sink. Instead we adopt a top-down construction process (from sink to the leaves), and thus forego the need to construct an aggregation tree a-priori of the (collision free) schedule construction. The resulting...
In this paper, we talk about the optimization of Energy in Wireless Sensor Networks and proposed routing protocol for Wireless Sensor Networks, baptized Energy Based Protocol (EBP) and Clustering EBP that operate under different scenarios and showed, many advantages in terms of load balancing, free looping, minimizing packet error rate and maximizing network lifetime.
In wireless fading channels, the path-loss exponent (PLE) is one of the most fundamental parameters to characterize the channel propagation. It has an important impact on the received signal strength (RSS)-based localization in wireless sensor networks (WSN). On the other hand, the communication range of a sensor in a WSN depends on the transmission power and on the environment (outdoor or indoor)...
Large scale wireless sensor networks require intelligent and reliable distributed information processing mechanisms which can effectively delegate decision at the field level. Consensus algorithms have been extensively studied and deployed in many generic multiagent systems framework and are able to provide localized agreement among sensing entities. The paper discusses the evaluation of a local consensus...
Interconnects play a critical role in various networking environments including data center networks, high performance computing systems, networks-on-chip, etc. An important design concern of interconnects is the hardware cost, especially when the scale increases. In order to achieve lower hardware cost, a lot of previous work leverages a tradeoff between the cost and the performance. In this paper,...
In this paper, we introduce a novel algorithm aiming at maximizing the transmission capacity in wireless sensor networks (WSNs). Based on the Dijkstra algorithm and the max-flow theorem, the proposed algorithm solves the contradiction between the path length and forwarding capacity of various nodes, and thus scales up the relay capacity in terms of the number of transmitted packets from the source...
Asymmetric link problem is one of unwanted behaviors that typically comes with low power radio link in wireless sensor network. This study presents a dual-tree topology to solve the asymmetric link problem. LQI (Link Quality Indication) is used to discriminate links for forming the proposed topology and increase link reliability. The topology consists of two trees instead of a single tree in the traditional...
In Wireless Sensor Networks (WSNs), to supply energy to the sensor nodes, wireless energy transfer (WET) is a promising technique. One of the most efficient procedures to transfer energy to the sensor nodes consists in using a sharp wireless energy beam from the base station to each node at a time. A natural fundamental question is what is the lifetime ensured by WET and how to maximize the network...
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