The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In mobile wireless sensor networks (MWSNs), each sensor has the ability not only to sense and transmit data but also to move to some specific location. Because the movement of sensors consumes much more power than that in sensing and communication, the problem of scheduling mobile sensors to cover all targets and maintain network connectivity such that the total movement distance of mobile sensors...
In this paper, a new scheme to reduce the positioning error is investigated for wireless sensor networks (WSN). To be specific, conventional Distance Vector-Hop (Dv-Hop) algorithm fail to calculate the average distance per-hop with high precision that caused by the random distribution of the irregular network topology, greatly leading to the positioning error in the Dv-Hop algorithm. To enhance the...
A localization method for mobile sensor networks is presented in this paper. In order to reduce localization errors, the artificial bee colony (ABC) algorithm is used to refine the estimated coordinates. The fundamental concept of the ABC algorithm is to find better feasible solution (food source) from food sources in the specific space. Using the idea, this paper study integrates the ABC algorithm,...
There is advantage of fixed physical location for airfield lighting in airport lamp monitoring using WSN, but some lamps location is irregular, which caused large consumption of the cluster head nodes in this logic region, early death, the formation of voids during transmission, and these voids undermined the entire wireless sensor networks energy balance, reduced the WSN lifetime. To solve these...
Wireless sensor networks (WSNs) which powered by batteries are widely used in military, healthcare, and scientific environments. One important challenge for setting WSN is the energy problem. Power management is one of efficient solutions for such problem and must be taken into account at all levels of the WSN. However, the power management may be out of action when the WSN suffers malicious attacks...
Reliability analysis is an important issue in wireless sensor networks (WSNs). This paper aims to study the reliability of a data flow in event-driven wireless sensor networks with multiple sending transmission approach without acknowledgments. Initially, an event-driven wireless sensor network model is described in terms of limited node battery energy and shadowed fading channels. Then, in order...
Radio Frequency Identification (RFID) has recently played an important role in wireless sensing network. However, if multiple passive tags are simultaneously transmitted to the reader, the reader is unable to identify the tags. This will reduce the efficiency of a RFID system. To solve this problem, we propose a modified anti-collision algorithm based on ALOHA protocol to improve the performance in...
The activity scheduling of sensors to alternately wake up for sensing obligation such that the network lifetime can be efficiently prolonged is a very important issue in wireless sensor networks (WSNs). Target area coverage is a new coverage problem in wireless sensor networks. The paper addresses the target area coverage problem and schedules sensors to alternatively wake up to collaboratively cover...
Node identification is one of the most important issues to wireless sensor network security. Current approaches use cryptographic authentication and certification tools to ensure the node identification, while this paper introduces an intuitive method to identify a node by measuring its clock skew. This method is based on our observation that every sensor node has a unique clock skew value that is...
This paper presents the development of a mobile robot platform, That can be use in offices and commercial environments. Thus the ability of a robot to plan motions autonomously is of importance. This work gives a new intelligent control of a wheeled mobile robot motion in an unknown environment. The technique generates satisfactory real time movements of autonomous robot to reach its goal safely.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.