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Geographic routing is one of the most widely used routing strategies in large-scale wireless sensor networks (WSN). With location-based routing, small, cheap and resource constrained nodes can perform the routing function without the need of complex computations and large amount of memory space. In the traditional approach, nodes advertise their availability to update the routing table. We eliminate...
Energy efficient topology in Ad-hoc networks can be achieved mainly in two different ways. In the first method, network maintains a small number of nodes to form a connected backbone and the remaining nodes sleep to conserve energy. This method is effective for low traffic networks. Energy efficiency in the second method is achieved by power control technique. This technique is effective in high traffic...
Wireless Body Sensor Networks (WBSNs) have recently gained a lot of research interests due to emerging new applications in health-care, sports and entertainment. As the design of effective network architectures is a key issue to achieve energy-efficient and low-latency communications between the on-body sensors, the 1-hop star and the 2-hop extended star architectures have recently been promoted by...
In cooperative networks, transmitting and receiving nodes recruit neighboring nodes to assist in communication. We model a cooperative transmission link in wireless networks as a transmitter cluster and a receiver cluster. We then propose a cooperative communication protocol for establishment of these clusters and for cooperative transmission of data. We derive the upper bound of the capacity of the...
MANETs are highly dynamic and suffer from frequent and unpredictable changes in the network topology due to the fact that devices are mobile and operate with low battery power. Due to limited computing power, high mobility and the lack of a central coordinating entity, service discovery in MANETs has been an attractive area of research. However, proposed solutions are broadcast-based and result in...
In recent years, improving network model and enhancing the network performance have received people's attention gradually. The peer-to-peer network model has been used in Ad Hoc networks to increase the data output rate, to reduce the transmission power, to increase network capacity and the better load balance. However, the network analysis topology computation, the routing and the energy supply have...
Energy costs for data centers are a significant part of the overall expenses for their operation. With a reduction of these and associated costs, huge savings can be achieved. This paper describes a way to reduce the energy costs for data centers. The general idea behind our solution is very simple. Instead of routing the information required for any service interaction to and from the data center...
In this work, we analyze the design of green routing algorithms and evaluate the achievable energy savings that such mechanisms could allow in several realistic network scenarios. We formulate the problem as a minimum energy routing optimization, which we numerically solve considering a core-network scenario, which can be seen as a worst-case for energy saving performance (as nodes cannot be switched...
Energy is one of the scarcest resources in Sensor Networks. Though there has been lot of work done in considering energy efficiency and the plausibility of energy harvesting at the level of a single node, seldom has it been discussed at a topology or network level. In this paper we examine the key aspect of energy management in Wireless Sensor Networks (WSN's) at a network level. A particular clustering...
Energy consumption of communication networks is an important contributor to the ICT sector's greenhouse gas emission footprint. This research project focuses on power consumption reduction of communication networks by dynamically adapting network configuration to traffic demands. This is promising as networks are often under utilised over long periods. In the context of this work, dynamic topologies...
Wireless Sensor Networks (WSNs) consist of small nodes with sensing, computation, and wireless communication capabilities. Wireless Sensor Network (WSN) is a promising data mining solution for precision agriculture. Instrumented with wireless sensors, it will become available to monitor the plants for real time, such as air temperature, soil water content, and nutrition stress. This real time information...
A wireless ad hoc network typically comprises of nodes with energy supplied by batteries. Hence, energy conservation is crucial to extending the lifetimes of individual nodes and the network as a whole. In topology control type of broadcast algorithms, the distance between neighbors is used to adjust the transmission power to reduce energy consumption. One such example is based on relative neighborhood...
A MANET is a set of mobile nodes connected by wireless link and are free to move dynamically and unpredictable in environment, but this dynamic nature of the network topology cause many challenges in MANET. Multicasting is an efficient way of providing necessary services for Ad hoc applications. Due to the dynamic nature of the network topology and restricted resources, finding and maintaining the...
Indoor Wireless sensor networks require a highly dynamic, adaptive routing scheme to deal with the high rate of topology changes due to fading of indoor wireless channels. Besides that, energy consumption rate needs to be consistently distributed among sensor nodes and efficient utilization of battery power is essential. If only the link reliability metric is considered in the routing scheme, it may...
In this paper we present a full performance analysis of an energy conserving routing protocol in mobile ad hoc network, named EM-AODV (Energy Multi-path Ad-hoc On-demand Distance Vector routing). EM-AODV is a reactive routing protocol which combines two mechanisms used in the basic AODV protocol. AODV and most of the on demand ad hoc routing protocols use single route reply along reverse path. Rapid...
Underwater sensor networks were recently proposed to support quite a few aquatic applications such as ocean exploration and harbor monitoring. Different from terrestrial WSNs, the underwater sensor networks have many unique characteristics, such as greater propagation delay, higher dynamic topology and sparse node density. These features bring many new challenges to the protocol design of underwater...
In Ad hoc networks, common routing protocols didn't take the energy of nodes into account during routing discovery process, which may cause network partition on account of energy drain of some of nodes. This paper proposed an energy saving routing protocol named ECAODV based on AODV. During routing discovering, the source node not only takes the residual energy of the intermediate nodes and hops,...
In order to realize hierarchical routings that should be executed in large-scaled mobile ad hoc networks that vary their topologies considerably with time, we have developed autonomous clustering with high scalability and adaptability. In autonomous clustering, an entire network is divided into disjoint subnetworks (called clusters), and they are maintained by periodically sending messages within...
The success of various sensor network applications highly depends on the use of energy-conserving routing methods to prolong network lifetime. We present a heterogeneous sensor network architecture consisting of a small number of high-end sensors serving as sink nodes and a large number of low-end sensors responsible for environmental sensing. We propose a path bottleneck-oriented and energy cost-based...
In this paper, we propose an energy-balanced cross-layer multi-path routing algorithm for wireless Ad hoc networks. This algorithm utilizes cross-layer information of the network nodes and can balance the energy consumption of the network nodes in flow distribution under the situation that the network topology is maintained unchanged; moreover, the transmission power can be adjusted in routing process...
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