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In the near future, autonomous and distributed systems consisting of a huge number of sensor nodes are expected to play an important role. Due to their distributed nature, each node should control itself autonomously by means of a local interaction algorithm. Although such local interaction algorithms improve system scalability, how to design a local interaction algorithm has become an issue. In this...
Several recent works propose mobile sink based data gathering approaches to distribute energy consumption in Wireless Sensor Networks. However, mobility based algorithms require the sink to periodically update its location to the network to ensure multi-hop connectivity. This additional information increases the control traffic overhead, and thus energy consumption also increases. In this paper, we...
Wireless sensor networks (WSNs) require simple and facile error control schemes because of the low complexity and high energy efficiency request of sensor nodes. In this paper, we discuss ARQ, FEC, and Chase combing hybrid ARQ (HARQ) schemes using energy efficiency analysis on different communication distances and link layer frame lengths. We proposed a high energy efficiency adaptive error control...
We consider the problem of gathering correlated sensor data by a sink node in a wireless sensor network. We design efficient distributed protocols to maximize the network lifetime subject to nodal energy constraints. Many existing approaches address the routing layer only, but the routing often interacts with physical-layer power control and MAC-layer link access. We present a first effort to maximize...
Data transmitted in large scale wireless sensor surveillance networks is highly spatial correlated resulting in transmission of redundant data, which increase the energy consumption. So it has been proposed to select a subset of sensors nodes to transmit their data so as to prevent transmission of redundant data. In this paper, we investigate the ways of selecting sensor nodes and develop a novel...
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,...
This paper introduces an approach of media access control for reducing collisions in a heterogeneous wireless sensor network, which contains different types of sensor nodes so a sensor fusion technique can be barely applied. Data packets sent to a designated node can cause serious collision due to a funneling effect of network traffic. At lightly loaded networks, our approach uses traditional random...
Data delivery is a major function of sensor network applications. Many applications, such as military surveillance, require the detection of interested events to be reported to a command center within a specified time frame, and therefore impose a real-time bound on communication delay. On the other hand, to conserve energy, one of the most effective approaches is to keep sensor nodes in the dormant...
The convergent feature of traffic in wireless body area networks (WBANs) makes congestion in certain areas which are the place of events and/or the location of sensor nodes near a sink. Congestion brings packet loss, retransmission, and delay at the node and it also causes the consumption of additional energy. Therefore there is no doubt that congestion needs to be controlled efficiently. In this...
Wireless sensor networks have been widely used in many important areas. Medium access control (MAC) protocols have a significant effect on the function and performance of sensor network. .This paper summarizes the present design paradigms of the MAC protocol in wireless sensor networks, then based on ring topology based on virtual grid and token ring ideas, an novel energy-efficient MAC protocol based...
Using controlled mobile elements is a promising approach to collect data from sensor nodes. It is very important to calculate a number of near-optimal routes for the fusion nodes that incrementally collect the data. Based on the multi-tier mobile network model, a new moving control strategy is proposed. This method first divides the monitoring field into several sub-regions so that fusion nodes can...
Environmental surveillance applications usually require a long living cycle of sensor nodes, especially when they are powered by non-charged batteries. Inspired by cellular automata, we propose a non-cluster based topology control method to prolong the lifetime of wireless sensor networks. Differing from the traditional cluster-based methods, our approaches lead a special way to maintain longer system...
Directional antennas have the potential to enhance the performance of wireless networks. However, exploiting their capabilities requires channel access schemes specifically designed for this purpose. Among the numerous applications of sensor networks, roadside and highway monitoring can benefit from the use of directional antennas due to increased communication ranges between the sensor nodes, reduction...
Recent advance in robotics technology has led to an increasing interest in mobile sensor networks that are constructed by sensor nodes with a moving facility (mobile sensors). Until now, we have proposed an effective mobile sensor control method, named DATFM (Data Acquisition and Transmission with Fixed and Mobile Node), for sparse sensor networks. DATFM achieves the effective data acquisition in...
A wireless sensor network consists of a large number of sensor nodes that are randomly deployed. This network is formed to perform the critical mission. The essential elements for the wireless sensor network are a source and sink. Source senses stimulus initiating a critical mission and transmits collected data to a sink. In the wireless network, the environment where a single sink and a large number...
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