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A wormhole attack is one of the most challenging yet detrimental security issues in mobile wireless sensor networks (mWSNs). However, as most of the existing countermeasures are designed mainly for fixed WSNs using hardware devices or information of entire WSNs (topology or statistical), they cannot be effectively used in mWSNs. In this paper, we propose,(More)
Understanding outage and failure characteristics of a network is important to assess the availability of the network, determine failure source for trouble-shooting, and identify weak areas for network availability improvement. However, there has been virtually no failure measurement and analysis on access networks. In this paper, we carry out an in-depth(More)
We propose Adaptive Geo-Source Multicast Routing (AGSMR) for WSNs. It addresses the scalability issue of previous location based stateless multicast protocols in WSNs. AGSMR is a novel stateless multicast protocol that optimizes the location-based and source-based multicast approaches in various ways. First, it saves the cost of a tree building by using(More)
Despite various high-tech Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communications that have been developed for enhancing traffic safety, protecting vulnerable road users (VRU), such as pedestrians and bicyclists from the vehicles and trains still heavily relies on the traditional sound warning method. Furthermore, as smart devices(More)
With the rapid proliferation of data centers, their energy consumption and green house gas emissions have significantly increased. Some efforts have been made to control and lower energy consumption of data centers such as proportional energy consuming hardware, dynamic provisioning and virtual-ization machine techniques. However, it is still common that(More)