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A Wireless Sensor Network (WSN) is composed of resource-constrained sensors with limited capabilities. Wireless Sensor Networks are subject to more packet loss and congestion. For efficient congestion control, an accurate and timely estimation of resource demands by measuring the network congestion level is necessary. To mitigate congestion, either the available resources have to be increased (resource...
This particular paper describes our most recent work on our system called JAWS. This system is intended to control and monitor Wireless Sensor Network. In principle, JAWS is agent system built on JADE platform. It consists of several agents that are able to communicate with Wireless Sensor Nodes. Via communication, we are able to obtain values from particular sensor nodes called motes. We are also...
Location awareness is one of the key prerequisites in any kind of positioning system. Accurate positioning is required in a wide area of applications. One of them is pedestrian localization. In this paper we focus on the task of localization and tracking using a IEEE 802.15.4a CSS network. Data is obtained from Time Difference of Arrival (TDoA) measurements. In order to generate highly accurate position...
Wireless Sensor Network (WSN) is widely used in Emergency Management System (EMS) to assure requirement of safety in current society. For centralized management, it is difficult for conventional systems to assure the real-time transmission of emergency information under rapidly changing situations. Thus, based on the Autonomous Decentralized Community (ADC) concept the main route for emergency information...
This paper presents a study of the optimal network design for efficient energy utilization in continuous data-gathering Wireless Sensor Networks (WSNs). We examine the problem of minimizing the network cost through the minimum number of relay-station installation. We model the network design problem as a mixed integer linear programming. Our key contribution is that the proposed model not only guarantee...
There are different Metrics for Quality of Service (QoS) in Wireless Sensor Networks (WSN) and most of them are application-dependent. One of the most important of them is the number of active nodes. Regarding the sensors redundancy, we can improve the network lifetime by activating enough number of nodes and making the others sleep. Also, proposing a method that uses the nodes energy equally can...
Wireless Sensor Network (WSN) is widely used in Emergency Management System (EMS) to assure requirement of safety. If emergency happens, real-timely transmitting emergency information in dynamically changing environment should be assured. Therefore, community is introduced to solve this problem. In this paper, to achieve high assure, autonomous community coordination technology is proposed. Each community...
Optimal distributed estimation algorithms are usually not practical for wireless sensor networks (WSNs). This is because, in a general setup, these algorithms have high computational and data communication costs. Thus, sub-optimal algorithms that use quantized data and are based on linear and Gaussian approximations have been proposed in the literature. Such approximations are not always applicable...
Due to the increasing advance on wireless communication and sensors, Wireless Sensor Networks (WSN) have been widely used in several fields, such as medicine, science, industrial automation and security. A possible solution is to use CMOS System on Chip (SoC) sensor nodes as hardware platforms due to its extremely low power, sensing, computation and communication capabilities. This work presents the...
This paper considers a cluster-based wireless sensor network (WSN) where each sensor node takes turn to be cluster head. The main function of the cluster head is to oversee the communication within and between clusters while the remaining sensor nodes are involved in sensing of the surrounding environment. We address the sensor utilization problem where non-cluster head nodes in a cluster make decision...
The problem of tracking moving objects with help of wireless sensor network (WSN) has been studied in past. Most of the solutions rely on the use of specialized and expensive sensors, and on dense deployment of sensors. These techniques are infeasible for applications in low budget domains. In this paper, we propose two novel techniques to track targets using binary sensing that does not need overlapping...
Nowadays, Wireless sensor networks (WSNs) are appeared to be new and promising solutions for next generation real-time wireless monitoring applications. These WSNs could become a threat if suitable security is not considered before the deployment. However, if there is any loophole in security, that might opens the door to attackers and hence, endanger for the applications. So, user authentication...
In WSN, sensors near the sink have to relay the data of the nodes away from the sink and as a result they drain their energy very quickly. It result in network partitioning and can significantly limit the network lifetime. This problem is termed as hotspot problem. Recently, formation of hot spot or energy hole near the sink has emerged as a critical issue for data gathering in WSN. In this paper,...
Recently, wireless sensor network is widely used. The deployment of WSN in the field, however, is still restricted due to limited energy supply, limited computing power, limited buffer size, and packet delay. In this paper we present a new cluster model and polling protocol integrating the schedule polling and low power listening scheme. The new clustering approach allows short routing between the...
Wireless sensor networks have become one of the most tempting networking technologies since it can be deployed without the need of a communication infrastructure. In general, there are some major concerns with this technology. That is, sensor node should have a long lasting system lifetime. And the system should keep the livability of nodes in a received level during the using process. In such systems...
Notice of Violation of IEEE Publication Principles"Workload-Based Query Routing Tree Algorithm in Wireless Sensor Networks,"by Yingchi Mao, Xiaofang Li, Yi Liang, in the 2010 International Conference on Computational Intelligence and Software Engineering (CiSE), December 2010, pp.1-4After careful and considered review of the content and authorship of this paper by a duly constituted expert...
In recent years, with advance in wireless communication technology, sensing technology, micro-electronics technology and embedded system, wireless sensor network (WSN) can be used for various application areas, such as home health care, military and industry. The localization service which provides the location information of mobile user is one of important service provided by WSN, because many applications...
Several applications in wireless sensor networks require a bidirectional communication between the sensing nodes and the sink. A number of relay nodes is used to achieve this bidirectional communication. The relay nodes adjust their communication range in order to consume less energy, constructing an asymmetric network with unidirectional links. In this paper, we examine the case where a bidirectional...
Localization is one of the most important issues in Wireless Sensor Networks (WSNs). A lot of effort has been devoted to this issue which can be broadly classified into two categories: range-based schemes and range-free schemes. This paper proposes a range-free localization scheme by utilizing mobile anchors. Each mobile anchor is assumed to be able to know its current position with specific hardware...
Wireless sensor networks (WSNs) should handle multiple sensing tasks for various applications. How to improve the quality of the data acquired in such resource constrained environment is a challenging issue. In this paper, we propose a sensor-channel co-allocation model for scheduling the sensing tasks. The proposed model considers the capability, coupling and load balancing constraints for sensing...
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