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A new Virtual Base Station (VBS) election technique is proposed by this paper to help in QoS provisioning in the infrastructure-less Mobile Ad-hoc Networks referred to as MANET. This VBS election technique is based on the mobile node's Signal-to-Noise Ratio (SNR) and has been applied on the MANET's hybrid routing protocol: The Zone-based Routing Protocol. The developed routing protocol will be referred...
MANETs is mobile networks with no infrastructure. The main characteristic of MANETs is mobility, which causes dynamic changing of topology and link failure. Route repair mechanism, which is initiated after link failure occurred, broadcasts route request messages to the network to find a new route. Finally, there are only a few nodes selected to be the member of the new active route. That means most...
Routing in mobile ad hoc networks (MANETs) is central to their proper functioning. Network dynamics make the routing a real challenging task. Although a host of studies has been reported in the literature evaluating the performance of proposed routing algorithms, a deeper insight reveals some residual malfunctioning: wall effects, looping and inconsistency. In this paper, we first unleash the cover...
A mobile ad hoc network (MANET) is an autonomous network that consists of mobile nodes that communicate with each other over wireless links. In the absence of a fixed infrastructure, nodes have to cooperate in order to provide the necessary network functionality. One of the principal routing protocols used in Ad hoc networks is AODV (Ad hoc on demand Distance Vector) protocol. The security of the...
Connectivity failures between nodes, resulting from nodes movement, are a major problem in MANETs. Indeed, many approaches have been developed to predict the quality of connections and the link expiration time. In this paper, we present a performance study of MANET that uses routing based on link expiration time prediction. We propose three prediction algorithms based on either the Global Positioning...
MANET is currently a hotspot in the wireless networks researching domain, and the routing protocol, which is as the core technology on network layers, is particularly important. Controlling node energy and increasing network lifetime are two keys to realize the transmission of efficient service for MANET. On the basis of analyzing classical MANET routing protocol, and combining with the idea of min...
With the increasing development of real-time and multimedia applications, there is a need to provide bandwidth and delay guarantees. Existing QoS ad hoc network routing protocols select path guaranteeing delay and/or bandwidth. However, they don't consider throughput optimization, which results in a low number of admitted real-time and multimedia flows. In this paper, we propose a cross-layer TDMA-based...
An ad hoc network is a collection of mobile nodes that dynamically form a temporary network. It operates without the use of existing infrastructure. Two on- demand routing protocols used in Ad-Hoc networks is AODV (Ad-Hoc On demand Distance Vector) protocol and DSR (Dynamic Source Routing) protocol. The security of the AODV protocol is compromised by a particular of attack called ??Black Hole?? attack...
Mobile ad hoc network is a collection of mobile nodes communicating through wireless channels without any existing network infrastructure or centralized administration. Due of the limited transmission range of wireless network, multiple "hops" are needed to exchange data across the network. In order to facilitate communication within the network, a routing protocol is used to discover routes...
Mobile adhoc network(MANET) is a ??on the fly?? network of mobile nodes. Packets are routed through mobile nodes instead of any fixed base station. (AODV) is most adopted routing protocol in MANET where a path is established when a node wants to communicate with another node. The period over which the communication proceeds through this path is known as a Session. When the mobility in the network...
Mobile Ad-hoc Networks (MANETs) have gained a lot of importance in the recent years due to their flexible ways of operation, where mobile nodes form the network to communicate with each other, without the aid of any fixed infrastructure. Routing in MANETs is a challenging task mostly for its rapidly changing topology. Several routing protocols have already been proposed and implemented for ad-hoc...
Cluster based routing protocols have the benefit of reducing routing overload and increasing performance in the transmission delay and throughput. In this paper, on the basis of CBRP we propose a new protocol called KHCBRP (K-Hop Cluster Based Routing Protocol) which enlarges the range of electing clusterhead to K hops and introduces the concept of metric of constraint degree to restrain the clusterhead...
The dynamic nature of MANETs makes the task of routing between source and destination nodes extremely difficult. In this paper a new efficient routing algorithm for mobile ad hoc networks is presented, along with a brief review of the state of the art scenario of routing topologies for MANETs. The new algorithm takes into consideration the mobility factor during routing. In the process, computational...
Routing in wireless ad hoc networks are vulnerable to traffic analysis, spoofing and denial of service attacks due to open wireless medium communications. Anonymity mechanisms in ad hoc networks are critical security measures used to mitigate these problems by concealing identification information, such as those of nodes, links, traffic flows, paths and network topology information from harmful attackers...
In mobile ad hoc networks the nodes are dynamically changing and they have a fully decentralized topology. Hence, security is hard to achieve due to the dynamic nature of the relationships between the participating nodes as well as the vulnerabilities and limitations of the wireless transmissions medium. We proposed a novel agent based framework to monitor, detect, and isolate misbehaving nodes in...
Adaptive distance vector routing algorithm (ADV) is a distance vector routing algorithm that exhibits some on-demand characteristics by varying the frequency and the size of the routing updates in response to the network load and mobility conditions. Using simulations we show that ADV outperforms AODV especially in high mobility cases by giving significantly higher (50% or more) peak throughput's...
Link state routing mechanisms have shown good convergence behaviour in networks with mobile hosts. Compared to traditional link state mechanisms, which suffer from broadcast storm problems in mobile ad hoc networks (MANETs), pruned link state approaches such as those used in optimized link state routing (OLSR) have shown significant reduction in the control overhead. In this paper, we show that the...
To weaken the selfish behavior of nodes in mobile ad hoc networks, many payment-based incentive schemes have been proposed recently, yet it is still far from achieving the expected efficiency to encourage node cooperation. In these schemes, source node selects a Least Cost Routing (LCP) for data transmission according to the forwarding cost reported by intermediate nodes and rewards them with some...
In a mobile ad-hoc network (MANET), node mobility has a significant impact on the performance of routing protocols. Most of the previous research has been focused on entity mobility models, i.e., movements of the mobile nodes are independent of each other. In this paper, we investigate the impact of swarming behavior of mobile nodes, as observed in many mobile networks, on the performance of MANET...
A mobile ad hoc network (MANET) is an autonomous network that consists of mobile nodes that communicate with each other over wireless links. In the absence of a fixed infrastructure, nodes have to cooperate in order to provide the necessary network functionality. One of the principal routing protocols used in Ad hoc networks is AODV (Ad hoc on demand Distance Vector) protocol. The security of the...
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