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Mobile ad-hoc networks (MANETs) are autonomous distributed networks, where mobile nodes communicate with each other using wireless links. Since the communication is done by wireless links, it is difficult to grasp how the packets flow between communication nodes. It becomes even more difficult when the number of nodes is increased. In our previous work, we proposed a visualization system for MANET...
Several protocols have been proposed to improve data accessibility in MANETs. Some of these proposals have adopted the cooperative caching scheme, allowing multiple mobile hosts within a neighborhood to cache and share data items in their local caches. Cross-layer optimization has not been fully exploited to further improve the performance of cooperative caching in these proposals. In this paper,...
In this paper, we address a scalable key management protocol for ad hoc networks, this protocol is based on new clustering technique. The network is partitioned into communities or clusters based on affinity relationships between nodes. To ensure trusted communications between nodes we proposed two types of keys generated by each clusterhead. The protocol is adaptive according to the limitation of...
This paper presents a new approach in the management of mobile ad hoc networks. Our alternative, based on mobile agent technology, allows the designing of mobile centralized servers in ad hoc network, where it is not obvious to think about a centralized management, due to the absence of any administration or fixed infrastructure in these networks. The object of this centralized approach is to provide...
To streamline the development of protocols and applications for wireless sensor networks with mobile elements, we propose the use of a virtual mobility overlay (ViMobiO). Using an idea from mobile ad hoc network research, physical nodes are seen as possible locations of logical nodes, whose motion is simulated with a state transfer between physical nodes. To maximize flexibility, state transfers are...
Disaster relief, education, and military are common situations where nodes need to communicate in areas without any preexisting infrastructure. In these situations, ad-hoc networks are used. Active Queue Management (AQM) has been successfully demonstrated as a solution to the global synchronization problem in the context of wired networks. To the best of our knowledge there is limited research work...
Traditional routing protocols deployed to provide communication among mobile nodes in wireless ad hoc networks (MANET) assume a trust and collaborating environment inside the network. However, this assumption is not always true and a hostile or unprotected environment can seriously affect the protocol and network performance. In this work two kinds of approaches are applied to a well-known routing...
Testing of applications for ad hoc networks poses a special technical challenge due to the difficulty of conducting experiments in an ad hoc network environment at a scale larger than a few nodes. One approach is to conduct experiments in a testbed that can imitate an ad hoc network. This requires the development of technologies that enable multiple instances of unmodified application software on...
This paper presents two novel mechanisms for the OLSR routing protocol, aiming to improve its energy performance in Mobile ah-hoc Networks. Routing protocols over MANET are an important issue and many proposals have been addressed to efficiently manage topology information, to offer network scalability and to prolong network lifetime. However, few papers consider a proactive protocol (like OLSR) to...
Adhoc networks are self-configurable networks with dynamic topologies. All involved nodes in the network are responsible for management activities. In multihop adhoc environment, it is difficult to maintain paths through intermediate nodes, due to the mobility of nodes, nature of radio transmission etc. In the absence of an authentication mechanism, malicious nodes can easily corrupt route tables,...
Because of its flexible advantages, ad hoc networks had a good prospect in forest fire, flood control and other atrocious environment. However, its secure problem becomes a hot spot in current networks security research, and building a proper trust management in ad hoc is a chief scheme. The paper first investigates the character of ad hoc networks and security challenge of it, after introducing the...
The following topics were dealt with: electromagnetic compatibility; mobile wireless networks; QoS; ad hoc networks; RFID; protocols; multimedia system; virtual reality; signal processing; coding; telecommunications services; network operations and management; information infrastructure and security; communication theory; communication software.
Mobile ad hoc networks (MANETs) are spontaneously formed with a set of wireless nodes without any existing infrastructure or administrative support. The intrinsic characteristics of these networks such as the dynamic topology and the scarcity of resources mainly bandwidth and nodes battery life make network management process a challenging task. In this paper, we present the design and a performance...
Efficient and improved methods of secured route discovery and secured data transmission in Mobile Ad-hoc Networks (MANET) are most recent research issues for ensuring full applicability of deploying MANETs in wide range of applications, including strategic as well as non-strategic. Secured route discovery has been addressed by SRP/SMT, as a generic protocol independent technique for secured route...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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