David J. Houck

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Critical national infrastructures for transportation, power, finance, and other basic industries rely heavily on information and telecommunications networks (voice, data, Internet) to provide services and conduct business. While these networks tend to be highly reliable, disasters may lead to extended outages requiring days/weeks to repair. These outages(More)
We propose an admission control algorithm for voice over Internet protocol (VoIP) calls and present the results of an extensive performance evaluation study. The proposed algorithm operates in VoIP gateways and rejects call requests when congestion is indicated in the path to the specified destination gateway. The algorithm derives the network congestion(More)
In contrast to a typical single source of data updates in Internet applications, data files in a networked information system are often distributed, replicated, accessed and updated by multiple nodes. Due to concurrent updates, replicated data files must be synchronized. For certain applications, stringent concurrency control must be employed to ensure data(More)
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