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How to measure and maintain connectivity is an important issue in ad hoc networks. A special case of such network is Wireless Sensor Networks (WSN), which are often deployed in harsh environments and also susceptible to a number of problems that may negatively affect the connectivity among the nodes. An additional factor that increases the cost of connectivity maintenance in ad hoc networks is when...
Clustering is a method for hierarchical management of a network. Especially, clustering is often used in MANETs. Johnen et al. proposed a self-stabilizing clustering algorithm which treats a MANET as a vertex-weighted graph. The algorithm has autonomous adaptability against topology changes and weight changes, while it does not consider the stability of clusters. In this paper, we present a weight...
Mobile ad hoc networks (MANETs) are multi-hop wireless networks of autonomous mobile nodes without any fixed infrastructure. In MANETs, it is difficult to detect malicious nodes because the network topology constantly changes due to node mobility. A malicious node can easily inject false routes into the network. A traditional method to detect such malicious nodes is to establish a base profile of...
Clustering allows efficient data routing and multi-hop communication among the nodes. In this paper, we propose Overlapping Clusters Algorithm (OCA) for mobile ad hoc networks. The goal of OCA is to achieve network reliability and load balancing. The algorithm consists of two discrete phases. The start-up phase takes battery and bandwidth capacity, transmission range, density, mobility, and buffer...
Since the energy constraint is one of the most important restrictions in wireless sensor networks so the issue of energy balancing is essential for prolonging the network lifetime. Hence this problem has been considered as a main challenge in the research of scientific communities. In the recent papers many algorithms have been proposed for clustering on wireless sensor network to balance the energy...
With an increased adoption of technologies like wireless sensor networks by real-world applications, dynamic network topologies are becoming the rule rather than the exception. Node mobility, however, introduces a range of problems (communication interference, path uncertainty, low quality of service and information loss, etc.) that are not handled well by periodically refreshing state information,...
Mobile Ad hoc Network (MANET) is the cooperative engagement of a collection of wireless mobile nodes without the support of any centralized access point or existing infrastructure. The use of virtual topologies is a good alternative to build wireless multi-hop networks. It aims to maintain a topology that optimizes broadcasting or network performances. The problem is to determine an appropriate topology...
Clustering offers a kind of hierarchical organization to provide scalability and basic performance guarantee by partitioning the network into disjoint groups of nodes. In this paper an energy efficient clustering algorithm is proposed under large-scale mobile sensor networks scenario. In the initial cluster formation phase, our proposed scheme features a simple execution process, which has a time...
Clustering is an important research topic for mobile ad hoc networks (MANETs) because clustering makes it possible to guarantee basic levels of system performance, such as throughput and delay, in the presence of both mobility and a large number of mobile terminals. A large variety of approaches for ad hoc clustering have been presented, whereby different approaches typically focus on different performance...
To identify the desired transmission range of each node in a cluster and power management based on mean transmission power within the context of wireless ad-hoc networks. By reducing the transmission range of the nodes, energy consumed by each nodes is decreased and topology is formed by sending messages between the nodes such as RTS and CTS. A new algorithm is formulated by deriving a mathematical...
Clustering of nodes provides an efficient means of establishing a hierarchical structure in mobile ad hoc networks. In mobile ad hoc networks, the movement of the network nodes may quickly change the topology resulting in the increase of the overhead message in topology maintenance; the clustering schemes for mobile ad hoc networks therefore aim at handling topology maintenance, managing node movement...
A mobile ad hoc network can be defined as a network that is spontaneously deployed and is independent of any static network. The network consists of mobile nodes with wireless interfaces and has an arbitrary dynamic topology. The networks suffers from frequent link formation and disruption due to the mobility of the nodes. A clustering method is used for obtaining a hierarchical organization for the...
Nowadays, inter-domain routing for MANETs draws increasing attention because of military and vehicular applications. The challenges in wireless, mobile inter-domain routing include dynamic network topology, intermittent connectivity, and routing protocol heterogeneity. The existing Border Gateway Protocol (BGP) is the de facto inter-domain routing protocol for the Internet. But BGP is not applicable...
This paper presents a novel Virtual Circle Combined Straight Routing (VCCSR) algorithm for a mobile sink to collect data in wireless sensor networks. Tree-based routing is a common scheme to collect data from sensors to a sink. Most of the previous proposed tree-like aggregation approaches are not suitable for mobile sink, because the routes between sink and sensors have to be reconstructed when a...
This paper proposes a dynamic energy efficient clustering algorithm for mobile ad hoc networks (MANETs). The proposed algorithm elects first the nodes that have a higher energy and less mobility as cluster-heads, then periodically monitors the cluster-heads' energy and locally alters the network topology or the clusters to increase the network lifetime by reducing the energy consumption of the suffering...
Both Peer-To-Peer (P2P) and mobile ad-hoc networks (MANETs) aim to provide seamless connectivity and services in a dynamic and decentralised environment. These two technologies, if unified, may be able to realise MANETs as a viable commercial technology and will enable the development of widespread distributed applications for MANETs. The push towards wireless ubiquitous computing means that service...
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