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Multidimensional scaling (MDS) has been recently applied to node localization in sensor networks and gained some very impressive performance. MDS treats dissimilarities of pair-wise nodes directly as Euclidean distances and then makes use of the spectral decomposition of a doubly centered matrix of dissimilarities. However dissimilarities mainly estimated by received signal strength (RSS) or by the...
Important applications of Wireless Ad Hoc Networks make them very attractive to attackers, therefore more research is required to guarantee the security for Wireless Ad Hoc Networks. In this paper, we proposed a transmission time based mechanism (TTM) to detect wormhole attacks - one of the most popular & serious attacks in Wireless Ad Hoc Networks. TTM detects wormhole attacks during route setup...
In mobile ad hoc networks (MANETs), nodes mobility causes network topologies to change dynamically over time, which complicates important tasks such as broadcasting and routing. Neighborhood tracking is a task to determine the neighborhood local view of a mobile node in time which can facilitate the forwarding decision in the design of network protocols. In this paper, we propose a predictive synchronization...
Unlike the conventional networks, the unique characteristics of mobile ad hoc networks (MANETs) pose a number of nontrivial challenges for pervasive service provision. Particularly, mobility of users/devices causes un-predefined and unpredictable changes in physical location and in available resources and services, event at runtime and during the same service session, thus forcing us to consider very...
Swarm Intelligence (SI) inspired routing algorithms have become a research focus in recent years due to their self-organizing nature, which is very suitable to the routing problems in Mobile Ad hoc Networks (MANETs). The network information can be collected and updated in a decentralized and dynamic way through the localized cooperation among these swarm agents. In this paper, we, for the first time,...
In ad hoc networks, disconnections occur frequently. In this paper, we allocate the data replicas according to time and space. In temporal method, we store the original data, the median data in a specific time period and the replica with the second highest frequency among all the other data on the mobile hosts to improve data accessibility. In spatial method, we store the original data, the median...
The existing power aware broadcast protocols for wireless ad hoc and sensor networks assume the impractical model where two nodes can communicate if and only if they exist within their transmission radius. In this paper, we consider practical models for power aware broadcast protocols. First, we employ a universal and widely-used statistic shadowing model for physical layer where nodes can only indefinitely...
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