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Wireless sensor networks (WSNs) usually build from huge number of randomly deployed sensor nodes in certain area. The sensors are mainly utilized to monitor physical and environmental conditions, gather information, process this data locally and transfer the sensed data back to the Base Station (BS). The main objective of this paper is to simulate, evaluate and observe the behavior of developed clustering...
A wireless sensor network (WSN) is a collection of sensor nodes which can monitor the physical activities and attributes of a whole spectrum of objects and environments. The purpose of collecting this data and processing it in a meaningful manner requires that it adds significant value to the end user. WSN are deployed ever more frequently and applications vary from providing an early alert system...
Spatially unbalanced energy consumption among sensors is the most important issue in Wireless Sensor Networks (WSNs). This uneven energy consumption can significantly reduce network lifetime. The use of sink mobility with constrained paths and decreasing the message flood by limiting the flood area can help to improve the energy efficiency in WSNs. Maximum Amount Shortest Path routing (MASP) is an...
Wireless Sensor Network (WSN) has recently emerged as a new widely used technology. However, the deployment of such networks has reported high rates of failures. Due to resource constraints of sensor nodes, the design of efficient failure detection techniques has become a very challenging issue. Already proposed WSN fault detection protocols have reported either a high number of false suspicions,...
Wireless Sensor Network as an important technology of Internet of things' development, is more and more widely used in various research fields. This paper mainly researches the part of localization application based on wireless sensor network, focuses on DV-Hop localization algorithm, and gives its algorithm simulation and analysis of the simulation results. Also this paper improves the algorithm...
Secure communication in Wireless Sensor Networks (WSN) is usually based on symmetric cryptographic approaches, whose robustness relies on an efficient key management protocol. Most of the reported key management protocols follow either a centralized approach where a single node has the authority of distributing the global shared key, or a partially collaborative approach where key distribution is...
In recent years, wireless sensor networks (WSNs) have been widely used in many real-life scenarios, and have become more and more important. However, in some harsh environments, sensor nodes may suffer from a large scale damage that causes the network to get partitioned into multiple disjoint segments. How to connect these segments (in WSNs) is very important. In addition, the higher the connectivity...
The simulation is nowadays one of the most widespread instruments for analyzing the Wireless Sensor Networks (WSNs). Unfortunately, the most widespread WSN simulators today have only the basic model for the battery, which does not account many of the important real-life hardware dependences. Therefore in the paper we are suggesting a novel approach to modeling the energy consumption for battery-powered...
Obtaining hundreds of sensor nodes to experiment new algorithms on Wireless Sensor Network (WSN) in real testbed is costly and time consuming. Simulation environment can reduce these costs though it may not produce exactly same results as real testbeds. There is many kind of simulations available for WSN such as Cooja and Tossim. None of these simulation environments provides an all-in-one solution...
This paper presents a clustering hierarchy protocol based on Energy Efficient Cluster Head Selection (EECHS), which aims to reduce energy consumption within the wireless sensor network and prolong the lifetime of the network. Simulation result shows that the proposed protocol (EECHS) has better performance than Based Energy Clustering (BEC) protocol in reducing energy consumption and prolonging lifetime...
In view of the good performance of active queue management (AQM) on congestion control in wired networks, we introduce AQM algorithm into wireless sensor networks (WSN) for avoiding congestion. For studying the performance of the three AQM algorithms including RED, REM and PI in the WSN environment, we compile powerful simulation script, modify NS2 source code and simulate them using the NS2 simulator...
Wireless Sensor Networks are by nature deployed over an undetermined geographical area with uncountable number of nodes, which makes them best studied through simulation. Due to special characteristics of these networks a number of simulation tools have been introduced by institutes and individuals each with different mechanisms and approaches. Hence, selecting a proper simulator based on the network...
Topology change is the main factor that affects the network life time of Wireless Sensor Network (WSN) applications. In static WSN, the topology change is often caused by node failure which is due to energy depletion. However, in the Mobile WSN (MWSN), the main reason of the topology change is caused by the node movement. Since the mobile sensor nodes are limited in power supply and have a low radio...
ZACA-EEC (Zigbee Ant Colony Algorithm Energy Efficient Cluster) routing protocol is proposed to replace AODV in Zigbee with the aim of increasing reliability for mine equipment monitoring in this paper, which can prolong the lifetime of network remarkably. Taking hydraulic support as an example, the distribution of monitoring nodes can be simplified as chain hierarchy topology, then Free-space model...
Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network's communication energy dissipation. However, selecting of the cluster head is not easy in different environments which may have different characteristics. In our previous work, in order to deal with this problem, we proposed a power reduction algorithm for sensor...
Wireless Sensor Network for their rapid deployment can be used in habitat monitoring for detecting fire and in disaster for helping rescue teams. Node localization is key factor for some applications. We propose the Triangular Centroid Localization algorithm (TCL). It is based in simple trigonometric figures and it does not require special hardware or synchronization time. In our simulations using...
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...
In wireless sensor networks (WSNs), sensor nodes are typically subjected to energy constraints and often prone to topology changes. While duty cycling has been widely used for energy conservation in WSNs, random walks have been popular for many delay-tolerant applications in WSNs due to their many inherent desirable properties. In this paper, we consider an opportunistic forwarding under an asynchronous...
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...
IRCRT is an end-to-end reliable transport protocol that acts according to RCRT, but improved its rate allocation unit. In this protocol, nodes can go in OFF state, and when a node is OFF, sink does not allocate any rate to it, so other nodes can use better from the channel capacity. In addition, when any part of network becomes congested, this protocol only decreases the rate of nodes that are in...
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