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Mobile ad hoc networks (MANETs) are wireless networks which have a wide range applications due to their dynamic topologies and easy to deployment. However, such networks are also more vulnerable to attacks compared with traditional wireless networks. Certificate revocation is an effective mechanism for providing network security services. Existing schemes are not well suited for MANETs because of...
Monitoring in mobile ad hoc networks (MANETs) constitutes a crucial service, as it enables the adaptation to the changing conditions in those networks based on the monitored state. Many monitoring mechanisms rely on a hierarchical structure, which must be maintained and suffers from sparsely populated networks, where the hierarchy might not be correctly established. Contrary to this structured design,...
The main deficiency of standard TCP and all existing variations in ad hoc mobile network arises in its inability to classify packet losses. Conventional TCP diagnoses all losses due to congestion since non-congestion losses are rare and ignorable in wired network. However, these losses are generated frequently in MANET due to signal attenuation, interference and node's mobility. In order to prevent...
Emerging networked systems require domain-specific routing protocols to cope with the challenges faced by the aeronautical environment. We present a geographic routing protocol AeroRP for multihop routing in highly dynamic MANETs. The AeroRP algorithm uses velocity-based heuristics to deliver the packets to destinations in a multi-Mach speed environment. Furthermore, we present the decision metrics...
Collecting information from mobile wireless networks has important civilian and military applications. One problem is to determine the number of nodes in a large wireless system. In a stationary wireless network, it can be trivially solved through a flooding-based query. However, the problem becomes much more challenging for mobile ad-hoc networks whose topologies are constantly changing. In this...
This paper evaluates the efficacy of a distributed location mapping application running over a Service Overlay Network (SON) in a MANET wireless environment. In the application, an application-layer routing protocol facilitates data forwarding from mobile nodes to a Command Centre. The performance of the location mapping application is evaluated by measuring the deviation of the reported locations...
In mobile ad hoc networks (MANETs), to acquire only necessary data items, it is effective that each mobile node retrieves data items using a top-k query, in which data items are ordered by the score of a particular attribute and the query-issuing mobile node acquires data items with k highest scores. In this paper, we propose a query processing method for top-k query for reducing traffic and also...
This paper proposes a novel approach for node localization with applications in mobile ad-hoc networks. The network consists of base nodes and target nodes. Base nodes equipped with antenna arrays are capable of localizing target nodes independently via integrated time-of-arrival (TOA) and direction-of-arrival (DOA) estimation. In addition, base nodes cooperate to improve the localization accuracy...
In mobile ad hoc networks (MANETs), time synchronization can be achieved by distributing time information among nodes. This type of time synchronization, however, does not work well under considerable long delay caused by sparse population. In this paper, we propose a simple yet effective scheme for relative time synchronization. When two mobile nodes meet, they exchange their clock information and...
The popularity of social networking service and the ubiquity of handheld devices improve chances of social interactions. Mobile social software emerges as a key part of this new trend. In order for users to enjoy this social experience, the resource state of member needs to be monitored so applications can adapt to dynamics of MANET and resource constraints on mobile devices. Previous work in resource...
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