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Wireless sensor networks are often deployed in harsh environments, where the adversary is able to capture certain sensors. Once a sensor is compromised, the adversary can easily replicate it and deploy several replicas back into the network for further malicious activities. Although a number of protocols have been proposed to tackle such node replication attacks, few of these schemes are suitable...
Vehicular ad hoc networks have emerged recently as a platform to support intelligent inter-vehicle communication and improve traffic safety and performance. The road-constrained and high mobility of the vehicles, their unbounded power source, and the emergence of roadside wireless infrastructures make VANETs a challenging research topic. A key to the development of protocols for intervehicle communication...
The present work focuses on emulation and validation of protocol stacks for MANETs (mobile ad-hoc networks) that must support multimedia applications in a tactical environment. We considered a network consisting of some tens of mobile nodes, with randomly variable speeds in the order of some tens of km/h. Nodes are deployed on a scenario of a few km2 and have a radio range of some hundreds of meters...
Mobile IPv6 may be considered as a routing protocol and it is designed to send data package to mobile nodes which change their places fast. Home Agent constitutes a significant part in Mobile Ipv6 protocol. The main method for a Mobile IPv6 protocol conformance test is the transverse test which involves a problem of the system synchronization and coordination. In order to overcome the weakness, a...
Most of the routing protocols for mobile disruption-tolerant networks (DTNs), are designed to route data from a single source to a single destination. Many real-world applications, however, need to transfer data to a group of recipients rather than individuals. Proposed architectures for multicast communication in mobile DTNs rely on a global knowledge of multicast group memberships that makes them...
The aim of this paper is to develop an efficient routing mechanism based on heading angle to establish connections. This can be done by prevent unessential links to be established between each pair of nodes that form the connection between the source and the destination. The unessential links represent the fragile links which could be broken easily according to the arbitrary movement of the nodes...
In a mobile ad-hoc network, network topology changes dynamically due to mobility of computers, battery consumption and failure of mobile computers. Until now, many ad- hoc routing protocol tolerating such changes of network topology have been proposed. Here, all data messages are forwarded by all mobile computers included in a message transmission route detected by an ad-hoc routing protocol. No intermediate...
In this paper, a DHT-based routing protocol which integrates at the network layer both traditional direct routing, i.e. MANET routing, and indirect key-based routing, i.e. P2P routing, has been proposed. The unique feature of such a proposal is the ability to build an overlay network in which both the logical and physical proximity agree, improving so the P2P performances. In addition, it outperforms...
A flat mobile ad hoc network has an inherent scalability limitation in terms of achievable network capacity. It is seen that when the network size increases, per node throughput of an ad hoc network rapidly decreases. This is due to the fact that in large scale networks, flat structure of networks results in long hop paths which are prone to breaks. These long hop paths can be avoided by using virtual...
Multicast services have received great interests recently. They normally cannot tolerate high packet delay and high loss rate. However, multicast services may be disrupted in mobile and wireless networks. Disruption may be caused by different reasons. In this paper, we consider the disruption resulted from handoffs between base stations. Although many mobile multicast protocols have been proposed,...
In this paper, we purpose a new routing protocol based on applications of hierarchical routing protocols, named as ldquoMulti-Level Cluster-based Hierarchical Protocolrdquo (MLCP) for large-scale mobile ad hoc networks. Our approach organizes nodes into different levels of clusters. MLCP maintains a hierarchical topology, where elected cluster-heads at lower level do not participate to next cluster-head...
The next generation mobile communication systems will be based on Infrastructure wireless LAN technologies like cellular and ad hoc networks. Such hybrid networks benefit the extension of infrastructure network coverage using Ad Hoc connectivity apart from offering the ad hoc nodes access to the resources of the Wired/Infrastructure networks. In most of the integration strategies Mobile IP is integrated...
Mobile ad hoc networks are networks without fixed infrastructure. The mobile nodes perform both as a host and as a router by forwarding packets to other nodes. Because of the nature of ad hoc networks, there are special demands for ad hoc routing protocols and the performance of these routing protocols is an important issue. This paper presents a simulation based comparative performance analysis of...
With the increasing interest in the application of wireless ad hoc networks, the demand for providing QoS in such applications also grows. Particularly, in sensor and actor networks, providing certain delay bounds is crucial for the actors as they perform their actions based on the received data from sensors. The usefulness of the content from sensors is based on its timeliness. In this paper, we...
Trends in fourth generation (4G) wireless networks are clearly identified by the full-IP concept where all traffic (data, control, voice and video services,etc.) will be transported in IP packets. Many proposals are being made to enhance IP with the functionalities necessary to manage the mobility of nodes, so that networks can provide global seamless roaming between heterogeneous wireless and wired...
We study the problem of secure routing in wireless sensor networks where the sensors and the sink can move during the execution of remote monitoring applications and communication is not necessarily directed towards the sink. We present a new routing protocol that builds upon a collection of mechanisms so that the integrity and confidentiality of the information reported to the controlling authorities...
This paper proposes the performance evaluation and comparison of the main topology-based routing protocols commonly used in wireless ad hoc networks: DSDV, OLSR, AODV and DSR in a different environment such as wireless mesh network. It provides an overview of available solutions based on detailed simulation study. The performance comparison is done with regard to the network size, network load and...
Data dissemination is an essential task in large-scale wireless sensor networks (WSNs). While performing data dissemination under a battery power constraint, energy efficiency is a key design factor of routing protocol because deployed nodes cannot be replaced or recharged after deployment and a dead node may lead to the partition of whole networks. As a solution for the efficient data dissemination,...
An ad hoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any established infrastructure or centralized administration. In such an environment, it may be necessary for one mobile host to enlist the aid of other hosts in forwarding a packet to its destination, due to the limited range of each mobile hostpsilas wireless transmissions. This paper presents...
A mobile ad hoc network (MANET) is a collection of mobile nodes that are dynamically and arbitrarily located in such a manner that the interconnections between nodes are capable of changing on a continual basis. In order to facilitate communication within the network, a routing protocol is used to discover routes between nodes. The primary goal of such an ad-hoc network routing protocol is correct...
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