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We describe an improved version of simple polling protocol employed in a wireless sensor network proposed. Although this simple wireless sensor network works efficiently, it is very limited in computing capability. Simple polling protocol works well in situation where every sensor node shares heavy traffic. However, when a few sensor nodes contribute to the traffic, most of the time slots allocated...
A new random access system, like ALOHA, is presented in this paper, where each mobile node will either be in a transmitting mode, in a receiving mode or in an idle mode. Results show that the traffic load is independent of the number of nodes, and can be controlled by controlling the transmitting probability, receiving probability and idle mode probability of each mobile node. Certainly, the presented...
WCDMA radio access networks are dimensioned using traffic models containing traffic characteristics for a number of services offered by the operators and their networks today. Recent trends have seen a new class of traffic emerging, driven by wireless sensor network applications and machine-to-machine communication. This communication between ldquothingsrdquo has traffic characteristics very different...
This paper presents an adaptive data collection (ADC) scheme with dynamic grid-length adjustment for mobile sinks in a grid-based wireless sensor network (WSN). Due to simultaneous collections of multiple mobile sinks, traffic distribution may become uneven and network congestion could occur. The proposed ADC can relieve the traffic by (i) adaptively adjusting transmission range between two primary...
The paper deals with mobile sensor networks and the related problem of area coverage. A distributed solution to the motion planning of the moving sensors for dynamic area coverage is given and compared to a global one. The distributed approach, despite its lower performances w.r.t. the global one, shows several advantages, from reduced computational costs to lighter communication traffic and then...
Data transmissions that require broadband capabilities are increasing in the airport area. Wireless broadband networks could be used to address these emerging needs, by supporting high- data-rate aeronautical applications in the airport environment. The Federal Aviation Administration (FAA) is considering the use of the 5091-5150 megahertz (MHz) band for the future potential implementation of such...
In this paper, we propose multimedia-enabled improved adaptive routing (M-IAR) that is optimized for single-source-to- single-destination multimedia sensory data traffic. It is an extension of the improved adaptive routing (IAR) algorithm presented in our earlier work, in response to the increasing number of applications incorporating wireless multimedia sensors such as wireless microphones and cameras...
The overlay-based network architecture has been recognized as an effective way to deal with the funneling effect in sensor networks, where sensors closer to the sink are usually responsible for relaying more network traffic. Such funneling effect is particularly harmful when the number of sensors in the network is vast. In an overlay-based sensor network, a special type of resource-rich multi-radio...
Most routing solutions for wireless sensor networks utilize static sinks to collect data from the entire network. This approach results in high traffic load at nodes located near the sink. These sensor nodes will be more requested than other nodes in the network, resulting in longer delays and packet losses. In this paper, we propose a mobile data collector strategy in order to alleviate the high...
Streaming real-time applications require the timely distribution of information in mobile ad-hoc and sensor networks. At the same time, such networks must operate energy-efficiently to maximize the lifetime of mobile devices and applications. In multi-hop networks, multiple communication paths between a single sender and receiver can be established, with varying real-time and energy characteristics...
In wireless sensor network, a lot of sensory traffic with redundancy is produced due to massive node density and their diverse placement. This causes the decline of scarce network resources such as bandwidth and energy, thus decreasing the lifetime of sensor network. Recently, mobile agent is proposed as a solution to overcome these problems. Mobile agent accounts for performing data processing and...
We propose a reduced-complexity genetic algorithm for secure and dynamic deployment of resource constrained multi-hop mobile sensor networks. Mobility and security are relatively expensive operations since they involve both communication and computation. Furthermore, these operations have to co-exist with optimal node and route assignments. The goal of this paper is to achieve optimal secure coverage...
Overheads incurred by routing protocols diminish the capacity available for relaying useful data over a mobile wireless ad hoc network. Discovering and understanding the lower bounds on the amount of protocol overhead incurred for routing data packets is important for development of efficient routing protocols, and for understanding the actual (effective) capacity available for network users. In this...
This paper presents SHiMmer, a wireless platform for sensing and actuation that combines localized processing with energy harvesting to provide long-lived structural health monitoring. The life-cycle of the node is significantly extended by the use of super-capacitors for energy storage instead of batteries. During this period the node is expected to work completely maintenance-free. The node is capable...
Recently there have been numerous research results in the area of power efficiency in ad hoc and wireless sensor networks. This paper discusses the effect of power efficient routing algorithms on the lifetime of multihop wireless sensor networks (WSNs). The WSNs considered are special cases of mobile ad hoc networks (MANETs); in particular, we assume that all data and control traffic in the WSN is...
The performance of mobile ad-hoc networks (MANET) is related to the efficiency of the routing protocols in adapting to frequently changing network topology and link status. This paper addresses the issue by comparing the relative performance of three key ad-hoc routing protocols: destination-sequenced distance vector (DSDV), ad-hoc on-demand distance vector (AODV) and optimized link state routing...
How to provide the sensor nodes with the locations of mobile sinks with minimum energy consumption is a key issue to the performance of the geographic location based routing protocols. In this paper, we investigate three location update methods: Neighbour update (NUPD), Flooding update (FUPD) and Unicast update (UUPD). We get the analytical expression of energy consumption of each method. Based on...
The following topics were dealt with: 3G/4G networks evolution; distributed systems; multimedia communication; network security; network traffic engineering; optical networks; satellite networks; wireless and mobile networks; convergence/integration in networks; MANETs and sensor networks; network management and performance; network testbeds; next generation networks; personal communication networks;...
A typical task in a wireless sensor network is that every sensor node senses its local environment and, upon request, sends the data of interest back to a base station. Based on this many-to-one communication pattern, we first propose a distributed N-to-1 multipath discovery protocol which distinguishes from other multipath routing protocols in that it is able to find multiple node-disjoint paths...
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