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Admission control plays an important role in providing Quality of Service (QoS) guarantees for wireless mesh networks (WMNs). Multipath routing can improve network performance in reliability and load balancing. However, when the multipath routing are adopted in 802.11-based WMNs, the transmission with bandwidth assurance is facing rigorous challenges. In this paper, a novel joint design of multipath...
Rumor Routing is one of the routing algorithm categories in wireless sensor networks which is well extended and optimized in the recent years. Common principal ideas in all rumor routing algorithms are conjunction of query-agents with the traversed path of event information propagator agents in the network. In this paper we propose a new method to reduce the number of routing agents to consequently...
Since we are not able to replace the battery in a wireless sensor network, energy and lifetime are the most important parameters. Common sensors are not able to connect directly with the central station due to their limited ranges in asymmetrical wireless networks, therefore, we utilize super nodes. A super node has more energy, processing power and a wider range of communication. It does connectivity...
An established Intelligent Power Management (IPM) strategy for a Wireless Sensor Network (WSN) is based on the principal that redundant nodes can be hibernated to conserve their energy. Due to the hibernation, sensed data from the node will be unavailable, which essentially means that the WSN will be blind in the vicinity of the hibernating node. Numerous strategies have been proposed to maintain...
Energy (battery) of the sensor node is considered as the scarcest resource in Wireless Sensor Network (WSN), hence a communication protocol that efficiently uses the limited energy must be developed. In this paper, Region-based Energy-aware Clustering (REC) scheme is presented to optimize the energy usage, with clustering has been identified as an effective data forwarding technique in WSN. With REC,...
Sensor networks are composed of many sensors usually far from the region is available. Routing in wireless sensor networks for the transfer of information from sensor nodes to base station is especially important. Optimum consumption of energy is important requirements in wireless sensor networks because sensor systems typically use battery power. In this paper with a routing algorithm to determine...
Power-aware routing, have been studied to avoid energy-scarce sensors and achieve network lifetime improvement but recently, it was noticed that sink mobility can also be used to improve network lifetime by avoiding excessive transmission overhead at nodes that are close to the location that would be occupied by a static sink. Also in many situations, a static sink may be unfeasible because of deployment...
DSSR is one of protocols for context-aware services in SANETs. By using user contexts, only the sensors that are relevant to a device's operating pattern transmit messages to the actuator. However there are some drawbacks for SANETs. To address DSSR problems, a routing protocol PAAR is proposed. Simulation studies show that our approach can lead to significant reductions in routing traffic and increases...
Coverage holes may exist in wireless sensor networks (WSNs) due to presence of obstacles or invalid sensor nodes in the sensing field. Normally, the holes make the data routing failure when the nodes transmit their data back to the sink. In this paper, distributed protocols are developed to identify the boundary nodes surrounding the holes of the sensing filed in WSNs without using any location information...
We propose target tracking with monitor and backup sensors in wireless sensor networks (TTMB) to increase the energy efficiency of the network and decrease the target capturing time while considering the effect of a target's variable velocity and direction. The approach is based on a face routing and prediction method. We use a state transition strategy, a dynamic energy consumption model, and a moving...
We consider multi-resolution storage, a technique for providing scalable adaptive data fidelity, necessary for many applications of large wireless sensor networks (WSNs). Although the previously proposed design of multi-resolution storage, based on quad trees and geographic routing, is conceptually simple, it exhibits inherent problems if applied to real-world WSNs. To address these problems, we revisit...
Traffic congestion avoidance is a critical issue associated with data routing in Wireless Sensor Networks (WSNs). Previous researches employ either traffic or resource control strategies as solutions. In this paper, we propose an energy-efficient grid-based traffic congestion avoidance scheme in WSNs, termed as TALONet. With our mechanism, the approaches applied to avoid congestion have three folds:...
Wireless sensor network (WSN) is an active area of research today. A WSN consists of a number of sensor nods each with limited energy, bandwidth, storage, and processing capability. Clustering is one of the basic approaches for designing energy-efficient, robust and highly scalable distributed sensor networks. One of the approaches to enhance the lifetime of WSN is to allow only some nodes in a cluster...
In this paper we present an improved gossiping data distribution technique with emphasis on the location of nodes called "LGossiping" that reliably disseminate information among sensors in a wireless sensor network. Nodes running LGossiping data distribution technique use global positioning system to relay data throughout the network. Each node decides upon position knowledge of the others...
In this paper, we propose a Network Mobility (NEMO) based ZigBee Mobile Router architecture and operations for supporting the network mobility of ZigBee network. Also, we present a design and implementation of the ZigBee mobile router for healthcare system. The architecture is particularly useful to manage patient's mobility where each patient is equipped with ZigBee sensor nodes.
Wireless sensor networks (WSNs) consist of large number of sensor nodes with limited sensing, processing and communication capabilities that cooperatively fulfill environmental sensing and monitoring tasks. WSNs are meant to be deployed in large numbers in various environments, including remote and more importantly harsh environments ensuing potential hardware or software faults which consequently...
Since the operations of sensors in wireless sensor networks (WSNs) mainly rely on battery energy, energy consumption becomes an important issue. In this paper, we use a global simulated annealing genetic algorithm (GSAGA) to create energy efficient clusters for routing in WSNs. The simulation results show that the proposed GSAGA algorithm has higher efficiency and can achieve better network lifetime...
Many anonymous communication solutions have been proposed to provide anonymous mobile ad hoc network (MANET) communications. However, they mainly focus on the routing layer and above to hide the end-to-end traffic patterns. The point-to-point communication relations are often considered as non-critical information in terms of anonymity, which actually exposes the traffic patterns on the PHY/MAC layer...
Dynamic address assignment is a desirable feature for deploying wireless sensor network. Typically, a distributed address assignment mechanism is accomplished by ZigBee alliance, whereas, sensors join a network is unpredictable, it may engender uneven node density, so it is possible that one node exhausts its list of addresses while another node has addresses go unused. Therefore, a preemptive approach...
Maximizing network lifetime and minimizing energy consumption and are two central issues in the design wireless sensor networks (WSN) protocols. In this paper, we address energy-efficient state assignment to sensors in cluster-based WSN, under the constraint of full coverage of the area the sensors are deployed in and connectivity of cluster heads. We consider that any sensor can be turned on, turned...
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