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dc.contributorMulti-disciplinary Studiesen_US
dc.contributorDepartment of Computingen_US
dc.creatorSo, Chi-ho-
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titlePerformance models and optimization for active network filtering applicationsen_US
dcterms.abstractIt is expected that future e-commerce applications will require more advanced network services. To support these new requirements, an active networking paradigm is emerging. More specifically, some network components will change from a passive store-and-forward entity to an active store-computation-forward entity. Active network filtering is a good application scenario. In our research, we formulated a framework to analyze the performance of an active network filtering application. The main concern was that the network needed to be able to decide whether a request should be forwarded to the active network filtering component or the application server directly. This is referred to as the routing decision. Two sets of performance models were formulated: M/M/1 and Markov Chain. The M/M/1 model provides a static routing scheme and the discrete time Markov Chain model incorporates a time-varying function for determining the routing decision. For both models, the expected system latency can be computed. A dynamic routing scheme, aiming at minimizing the expected system latency, is proposed. It makes forwarding decisions based on the loading conditions of the active network filter as well as the server. The dynamic and static routing schemes were compared and simulation programs using the Petri Net Model were developed for validation and further performance analysis.en_US
dcterms.extentvi, 74, 13 leaves : ill. ; 30 cmen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.LCSHComputer networksen_US
dcterms.accessRightsrestricted accessen_US

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