caa a22 4500 445822066 CHVBK 20180317145247.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00779-011-0369-1 doi (NATIONALLICENCE)springer-10.1007/s00779-011-0369-1 A new model for context-aware transactions in mobile services [Elektronische Daten] [Muhammad Younas, Soraya Kouadri Mostéfaoui] With the ubiquity of handheld devices (such as smart phones and PDAs) and the availability of a wide range of mobile services (such as mobile banking, road traffic updates, and weather forecast), people can nowadays access information and conduct online transactions virtually anywhere and anytime. In such flexible, dynamic but less reliable environment, transaction management technology is believed to provide service reliability and data consistency. Indeed, in mobile and ubiquitous environments where devices as well as services can seamlessly join and leave the ubiquitous network; transaction management can be very helpful during the recovery of services from failure. Current transaction models and commit protocols do not take into account context information. However, in mobile environments, it is imperative to consider context information in the commit of a transaction—i.e., a transaction can be successfully completed if it meets the required context. In this paper, we propose a new model for context-aware transactions and their performance management in mobile environments. Unlike conventional transactions, context-aware transactions adapt to the required context. By context, we mean the service's context as well as the users' context that includes users' needs and preferences. This paper designs and develops the proposed transaction model and evaluates its performance in terms of time and message complexities as well as transaction's throughput. Springer-Verlag London Limited, 2011 Context-aware transaction nationallicence Mobile and ubiquitous services nationallicence Transaction model nationallicence Performance nationallicence Transaction properties nationallicence Younas Muhammad Department of Computing and Electronics, Oxford Brookes University, Oxford, UK aut Kouadri Mostéfaoui Soraya Department of Communication and Systems, The Open University, Milton Keynes, UK aut Personal and Ubiquitous Computing Springer-Verlag 15/8(2011-12-01), 821-831 1617-4909 15:8<821 2011 15 779 https://doi.org/10.1007/s00779-011-0369-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00779-011-0369-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Younas Muhammad Department of Computing and Electronics, Oxford Brookes University, Oxford, UK aut NATIONALLICENCE 700 1- Kouadri Mostéfaoui Soraya Department of Communication and Systems, The Open University, Milton Keynes, UK aut NATIONALLICENCE 773 0- Personal and Ubiquitous Computing Springer-Verlag 15/8(2011-12-01), 821-831 1617-4909 15:8<821 2011 15 779 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer