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Mobile Ad hoc network consists of a collection of mobile nodes capable of forming instantaneous network with dynamic topology. Each node simultaneously acts as both router and host. Nodes can leave or join the network freely. Destination Sequence Distance Vector (DSDV) is a modification of the conventional Bellman-Ford routing algorithm for ad hoc networks. Dynamic topology of ad hoc networks makes...
A Mobile Ad hoc NETwork (MANET) is an infrastructure-less, spontaneous, and arbitrary multi-hop wireless network, consisting of group of mobile nodes. The topology of the network can change randomly due to unpredictable mobility of nodes. In order to allow truly spontaneous and infrastructure-less networking, a protocol for dynamic allocation of unique addresses is needed, because pre-configuration...
In opportunistic networks, mobile nodes are enabled to communicate with each other even if a route connecting them never exists. Because nodes are not supposed to possess any knowledge about the network topology, each single node acts as a gateway and uses its local knowledge to decide next hop when forwarding messages. It is necessary to find those nodes who can spread messages more efficiently to...
In mobile ad hoc networks (MANETs), where the mobility of nodes dynamically changes the network topology, broadcasting plays a major role in disseminating control data packets and route discovery process. However, straightforward broadcasting is highly resource demanding and less controllable process. Random walk based searching on the other hand are controllable and consumes less network resource...
Mobile Ad Hoc Network is a Network composed of mobile nodes that topology is constantly changing. If in the routing in these networks, the nodes that are selected as route nodes are not stable and have a high mobility, data transmission route is broken quickly. Therefore, the method can be considered in the routing that from the nodes are between source and destination, nodes that are more stable,...
The topology control for guaranteeing QoS requirements of nodes might not have any solution because of the limited resources of nodes, e.g., the maximum transmitting power. In this case, the mobility of nodes can compensate for the shortage of resources and then makes a topology feasible. We propose the energy efficient mobility control algorithms for the QoS topology control with the least movement...
In this paper, we present the implementation and analysis of our implemented testbed considering the optimized link state routing (OLSR) protocol. We investigate the effect of mobility and topology changing in the throughput of a mobile ad-hoc network (MANET). The mobile nodes move toward the destination at a regular speed. When the mobile nodes arrive at the corner, they stop for about three seconds...
Wireless sensor network is a new information acquisition and processing technology, which is widely used in monitoring systems. Taking into account that the physical topology of the mine is relatively fixed, as well as that the energy can be added to the mobile nodes, in this paper we propose an energy-efficient wireless sensor network routing algorithm to adapt to the mine environment. Demonstrated...
Ad hoc networks are known by many specifications like multi-hop wireless connectivity, frequently changing network topology and the need for efficient dynamic routing protocols that plays an important role. This paper presents a performance comparison between two reactive routing protocols for mobile ad hoc networks: dynamic source routing (DSR), ad hoc on demand distance vector (AODV).Both protocols...
Ad hoc networks are collection of mobile nodes which communicate using wireless media without any fixed infrastructure. Each mobile host acts both as a network router and an end point as packets are forwarded over multiple hops. Node mobility being the distinguishing feature of the mobile ad hoc network, makes routing an important challenge. Hence, Quality of Service (QoS) is not easily achieved in...
Clustering is an efficient and important method to facilitate energy conservation. Aiming to alleviate the high overheads of migrating management information in the re-clustering process of a clustering algorithm, an energy efficient, Complete Graph-based Clustering Algorithm (CGCA) is proposed in a densely deployed sensor network. CGCA divides the network into a few complete graphs, each complete...
Engineers have proposed lots of mechanisms for providing secure communications in ad hoc networks since the early 1990s. Due to the absence of fixed infrastructure, ad hoc networks are more vulnerable when encountering security threats than conventional wireless networks. The mobile ad hoc network can be considered as a short-lived collection of mobile nodes that communicate with each other. All involved...
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