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Transactions Adaptables pour les Environnements Mobiles

Abstract : In this dissertation, we are interested in transactions in mobile environments. The focussed problem is the context influence on transaction execution. Mobile environments are characterized by highly variable wireless networks and by limited mobile host resources. Such characteristics affect data management and in particular, they generate high rates of transactional failures and unpredictable execution costs. We propose an Adaptable Mobile Transaction model (AMT) that allows defining transactions with several execution alternatives associated to a particular context. This model offers the possibility of adapting transactions to the context and controlling execution costs with respect to application correctness criteria. The AMT model has been specified by using the formalism ACTA. We propose an analytical study which shows that (1) using AMTs increases commit rates, and (2) costs become predictable thanks to the possibility of choosing transaction execution types according to the context. To validate our approach, we defined the middleware TransMobi that manages environment awareness and implements the AMT model with suitable protocols. Among these protocols, we propose CO2PC, a commit protocol to ensure semantic atomicity. We developed a TransMobi prototype in PersonalJava that uses a relational databases, a WLAN and personal assistants (PDA).
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Contributor : Patricia Serrano Alvarado Connect in order to contact the contributor
Submitted on : Thursday, March 4, 2004 - 12:43:05 PM
Last modification on : Friday, March 25, 2022 - 11:08:29 AM
Long-term archiving on: : Friday, April 2, 2010 - 7:48:16 PM


  • HAL Id : tel-00005203, version 1




Patricia Serrano Alvarado. Transactions Adaptables pour les Environnements Mobiles. Réseaux et télécommunications [cs.NI]. Université Joseph-Fourier - Grenoble I, 2004. Français. ⟨tel-00005203⟩



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