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A novel range-free localization approach, smallest enclosing Circle based Localization (SECL), has been proposed. This approach uses the center of smallest enclosing circle of neighboring anchor nodes to estimate the position of target. Comparing to centroid, SECL considers the geometrical coverage of anchors rather than the mass center of them. Consequently, SECL is robust to imperfect topology,...
GEM is an ingenious routing algorithm for wireless sensor networks that is based on the idea of graph embedding. However, it cannot survive edge failures well because reliability was not taken into consideration seriously when it was designed. In this paper, we propose UD-GEM, a GEM-based multi-path routing algorithm that improves the reliability performance of GEM significantly. Specifically, in...
Wireless sensor network (WSN) is a wireless network that gathers information from remote area with autonomously configured routing path. We propose a fusion based routing for converge cast in which all sensors periodically forward collected data to a base station. Previous researches dealt with only full-fusion or no-fusion case. Our fusion rate based spanning tree (FST) can provide effective routing...
Wireless sensor network (WSN) consists of tiny nodes with sensing, actuating, computation, wireless communications capabilities. Because of node's limited energy, many routing, topology control, media access control (MAC) protocol have been specially designed. This paper discussed power management of topology control, media access control protocol and routing protocol in wireless sensor network. Based...
According to the characteristics of coal face and laneway landform, a catenulate hierarchy of wireless sensor network (WSN) is proposed including its topology control algorithm. For establishing bottom infrastructures of WSN, the distance between cluster nodes and cluster headers is defined, and the cluster headers selecting algorithm is analyzed. In the top backbone transmission network, a HETCA...
The growing popularity of location-enabled devices has driven the demand for more efficient and reliable geographical routing algorithms for mobile ad hoc networks (MANET) and wireless sensor networks. The characteristic of this network is that nodes exchange geographical location with neighbors, and no global topology or central management is required. This paper proposes a hybrid approach for routing...
Wireless sensor network is applied widely in monitoring system of coal mine. An application environment of WSN in coal mine is analyzed to satisfy the data acquirement of mine monitoring. The result of analysis shows that routing protocols applied in coal mine should have four characteristics: data-centric routing mechanism, supporting query of geographic position information, low delay and high reliability...
Several simulation tools are used to evaluate network performance including OMNeT++. In this paper, a case of topology control (TC) in WSNs is simulated by considering its interaction with MAC layer and routing based on the SensorSimulator framework. Some ways to improve the simulation efficiency are described. Finally, the simulation results are given.
Wireless Sensor Networks (WSN) have been noticed and researched nowadays. These new type of networks have unique characteristics. WSNs have different limitations such as computational power, storage capacity, energy source and etc. The main constraint of wireless sensor networks is energy. The energy source of sensor nodes is limited and not rechargeable. Therefore, optimizing consumption of energy...
In our paper we consider the comparison performance of wireless sensor network to optimize the event detection and TDMA schemes using cross layer interaction. We consider the accuracy and lifetime of WSN because accuracy and lifetime are the important parameters of wireless sensor network because working of system depends upon it. Lifetime maximization relates with various factors such as throughput,...
In wireless sensor networks, the data aggregation is an essential paradigm for routing, through which the multiple data from different sensors can be aggregated into a single data at intermedial nodes enroute, in order to eliminate data redundancy and achieve the goal of saving energy. Some existed medium access protocols and algorithms can effectively prolong the lifetime of the sensor network by...
In a realistic sensor network, in particular with a non-uniform deployment, sensor nodes inevitably have varying workloads. This causes a natural problem that some sensor nodes are subject to excessive power consumption and thus become hot. These hot nodes deplete much earlier resulting in system performance degradation. This paper proposes a systematic approach to design a hotness-aware sensor network...
The next generation of wireless sensor networks will integrate communication systems beyond the third generation paradigm. As a result of this integration, the new communication systems will be fed by the sensor networks with information gathered from the environment, achieving context awareness. To reach the necessary end-to-end connectivity between all-IP networks and sensor networks, the IETF 6LoWPAN...
This paper presents a simple routing protocol based on topology control that improves the lifetime of a wireless sensor network in the usual convergecast pattern, by allowing the nodes to choose between two predefined power-levels to forward data towards the sink. The proposed protocol takes advantage of non-homogeneous topologies, where the nodes are grouped in clouds. Nodes will only use the highest...
Topology control and routing protocols are used by designers of wireless packet data networks to lower the node degree, simplify routing and lower the nodes' energy consumption, while preserving strong connectivity. We assume a popular fading channel model and study the impact of several topology control schemes on the transmit power of nodes randomly distributed over a large area according to a Poisson...
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