Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3933
Título: Handling QoS dependencies in distributed cooperative real-time systems
Autor: Nogueira, Luís
Pinho, Luís Miguel
Data: 2008
Editora: Springer
Relatório da Série N.º: Distributed Embedded Systems: Design, Middleware and Resources; Vol. 271
Resumo: Due to the growing complexity and adaptability requirements of real-time embedded systems, which often exhibit unrestricted inter-dependencies among supported services and user-imposed quality constraints, it is increasingly difficult to optimise the level of service of a dynamic task set within an useful and bounded time. This is even more difficult when intending to benefit from the full potential of an open distributed cooperating environment, where service characteristics are not known beforehand. This paper proposes an iterative refinement approach for a service’s QoS configuration taking into account services’ inter-dependencies and quality constraints, and trading off the achieved solution’s quality for the cost of computation. Extensive simulations demonstrate that the proposed anytime algorithm is able to quickly find a good initial solution and effectively optimises the rate at which the quality of the current solution improves as the algorithm is given more time to run. The added benefits of the proposed approach clearly surpass its reducedoverhead.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3933
ISBN: 978-0-387-09661-2
ISSN: 1571-5736
Versão do Editor: http://link.springer.com/chapter/10.1007%2F978-0-387-09661-2_19
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