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In wireless sensor networks (WSNs), numerous sensors can produce a significant portion of the big data. It remains an open issue how to timely gather and transmit such large amount of data while minimizing data latency through wireless sensor networks (WSNs). On the other hand, spatially correlated sensor observations lead to considerable data redundancy in the network. To efficiently eliminate data...
A self-calibrated centroid localization algorithm is presented for wireless sensor networks based on IEEE 802.15.4 radio standard. Beside common issues in ranging accuracy using either received signal strength (RSSI) or link quality (LQI), it is challenging to cope with the fast changing environments. Although good accuracy has been achieved with methods such as Weighted Maximum Likelihood Estimation...
Electromagnetic energy harvesting has been identified as a free compliment resource to wireless sensor nodes, which essentially prolongs the operating lifespan of built-in batteries. Voltage multiplier is a critical component in energy harvesting circuits and it attracted plenty of efforts in studying how to optimize the design. However, little information was found on how to determine the necessary...
This paper aims at providing a green battery solution for practical wireless communication systems. First, we discuss the demands and latest developments of wireless energy transfer (WET) in relevant industries. Second, we propose a user- centric energy-efficient approach in wireless powered communication networks (WPCNs), where mobile users first harvest energy from a dedicated power station and...
In this paper, we address the problem of allocating channels to wireless users in the multiuser-multichannel dynamic spectrum access (DSA) scenario. To solve this problem, we introduce a special form of multi-armed bandit (MAB), named exploration bandit, into DSA for the first time. Two distributed algorithms are proposed to maximize the channel rewards (e.g., transmission rates) of the users. Meanwhile,...
In wireless sensor networks (WSNs), there is no predefined infrastructure. Nodes need to frequently flood messages to discover routes, which badly decreases the network performance. To overcome such drawbacks, WSNs are often grouped into several disjointed clusters, each with a representative cluster head (CH) in charge of the routing process. In order to further improve the efficiency of WSNs, it...
Wireless Sensor Networks (WSNs) have gained worldwide attentions in recent years. Since WSNs can be conveniently deployed to monitor a given field of interest, they have been considered as a great long-term economic potential for military, environmental, and scientific applications etc. One of the most active areas of research in WSNs is the coverage which is one of the most essential functions to...
This paper presents an analytical method for one to compute the centroid of the overlapping area of two intersecting circles with arbitrary orientation. We also extend the solution to estimate the centroid of the overlapping area of three intersecting circles. Furthermore, based on the analytical solution of centroid computing, we propose a cell-based localization technique, namely Centroid Based...
Large-scale wireless sensor network (WSN) deployment is a major challenge for Internet of Things (IoT) to connect physical world through sensors or tags at the scale of billions of objects. Today's WSNs normally use dedicated gateways to bridge sensors and IP networks. The installation and maintenance of such a WSN infrastructure are expensive and non-scalable. As the number of smart phone users grows...
In this paper, we focus on network coding design for the wireless sensor networks (WSNs), where multiple source nodes communicate with a common destination node with the help of multiple relay nodes in a two-hop fashion. Specifically, we propose an unequal error protection (UEP) distributed network-channel coding (DNCC) scheme based on Luby-transform (LT) codes. We analyse three properties of the...
Recent advance in integrated circuit design enables the steady development of wireless sensor networks (WSNs) and fast microprocessors are being equipped on senor nodes. Consequently, computational capacity of a sensor node increases, and it allows for the adoption of sophisticated optimization algorithms. This motivates us to investigate the applicability of model predictive control (MPC) in the...
In this work we investigate the use of location information in the context of emerging 4G wireless communication systems, in which cooperative communication among mobile nodes is utilized. We first determine the optimal throughput achievable in such systems under the assumption of perfect knowledge on the locations of the mobile nodes. We then investigate how the system throughput is significantly...
Ubiquitous computing technology has brought great attentions in recent years since it promises a simple operation to an ever increasing comprehensive digital world. For a networked home supporting advanced applications, ubiquitous media access becomes a must to offer enjoyable experience for home users. The first step of ubiquitous computing is the seamless detection of user activities in order to...
Particle filter (PF) is an important way for target tracking in wireless sensor network (WSN). In the paper we proposed an improved particle filter algorithm which outperforms general PF when target suddenly changes movement direction. Our algorithm used estimated direction of motion based on the current measurements to optimize the prediction in PF. It modified the deviation of estimated mean of...
In this paper, An uneven clustering routing based on ARMA model(UCR-A) was proposed for the "hot spot", and the main ideal is that the entire region is divided into unequal radial level with the base station at the center. Cluster head is chosen based on the residual energy and the relative position. Multi-hop data routing was formed in inter-cluster, and apply ARMA prediction model to the...
The current distribution in aluminum reduction cells is of great significance, but currently adopted simple detection methods and analytical tools can not meet the need for its current distribution on-line monitoring. The paper, based on the principle of anode and cathode equal-distance voltage measurement, with successful integration of advanced wireless sensors network technology and dynamic web...
Self-deployment is one of the main research issues in wireless mobile sensor networks. It determines quality of service of networks, such as coverage and connectivity. In this paper, we present a distributed self-deployment algorithm by distance and orientation control (DOC). Distance control tries to keep the distance among sensor nodes equal to the ideal distance in equilateral triangle grid deployment,...
Recent advances in wireless communications and electronics have promoted the development of wireless sensor networks (WSN) for a wide variety of applications. The size and power constraints of sensor nodes are the main concerns in the design of robust and efficient routing protocols. Consequently, various approaches, such as data-centric approach, hierarchical approach and location-based approach,...
This research aims to develop a new sensor-based localization technique which is exclusively used for forest fire detecting systems. Our algorithm addresses three key criteria of forest fire detecting systems deployed in nature, which are: low complexity, high efficiency and low power consumption, by the 2 features: estimating a grid-based output and adopting an event-triggering mechanism. The algorithm's...
In this paper, the patterns for k-coverage (2≤k≤4) based on optimal l-connectivity (3≤l≤6) patterns are deeply discussed and a series of deployment patterns for k-coverage and l-connectivity are proposed under different ratios of sensor communication range (denoted by Rc) over sensing range (denoted by Rs) for Wireless Sensor Networks (WSNs). The patterns proposed are based on regular graphs and have...
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