The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2012
Filed:
Oct. 31, 2007
Naoto Sato, Kanagawa-ken, JP;
Hiroaki Nakamura, Kanagawa-ken, JP;
Naoto Sato, Kanagawa-ken, JP;
Hiroaki Nakamura, Kanagawa-ken, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The reliability of a composite service having service components is determined, where the composite service can fail only where underlying resources fail. The composite service is represented as a plurality of continuous-time Markov chains (CTMC's). Each CTMC corresponds to a resource. A product of the CTMC's is constructed. The product encompasses composite service states. Steady-state probabilities for the product are determined. Each steady-state probability corresponds to a likelihood that a corresponding state will be a steady state. For each state of the composite service, a reward structure is determined. The reward structure corresponds to a likelihood that the state will successfully use the resources without failure. The reward structure is determined for a given state based on the given state's steady-state probability and based on discrete-time Markov chains (DTMC's) corresponding to the service components. The reliability of the composite service is determined based on the reward structure of each state.