Sejun Song

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—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 mul-ticast protocol that optimizes the location-based and source-based mul-ticast approaches in various ways. First, it saves the cost of a tree building by using(More)
—We propose a novel multicast protocol, named Multicast Routing with Branch Information Nodes (MR.BIN) for wireless sensor networks (WSNs). Addressing the various overhead issues of existing WSN multicast protocols, MR. BIN uses a hybrid approach of geographic unicast routing and state-based multicast routing. It achieves an optimal tradeoff among the(More)
Traffic and resource monitoring is the essential function for large-scale enterprises, service providers, and network operators to ensure reliability, availability, and security of their resources. For this reason, many large-scale enterprises and providers have been investing in various standalone dedicated monitoring solutions. However, they find the cost(More)
We propose a network quality aware routing (NQAR) mechanism to provide an enabling method of the delay-sensitive data delivery over error-prone wireless sensor networks. Unlike the existing routing methods that select routes with the shortest arrival latency or the minimum hop count, the proposed scheme adaptively selects the route based on the network(More)