A resource and context model for mobile middleware |
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Authors: | Sten L Amundsen Frank Eliassen |
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Affiliation: | (1) Simula Research Laboratory, Network and Distributed Systems, P.O. Box 134, 1325 Lysaker, Norway |
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Abstract: | Mobile computing systems should be self-managed to simplify operation and maintenance plus meet user’s expectation with respect
to Quality of Service (QoS). When architecting self-managed mobile computing systems, one must take a holistic view on both
QoS management and the entities in the mobile environment. This paper presents a novel model that includes both resources
and context elements. To illustrate the usefulness of the model, it is applied to a video streaming application by: (1) modelling
context elements and resources in the environment, (2) specifying context dependencies and QoS characteristics of the application,
and (3) designing weakly integrated resource and context managers. We describe a middleware that uses the developed managers
when evaluating context dependencies and predict offered QoS of alternative implementations of the application. In order to
select the one that can operate in the current environment and that best satisfies given user preferences. |
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Keywords: | Context model Resource model Mobile middleware QoS management Context management QoS specifications |
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