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Dynamic member service selection method based on descending factors in service combination

A technology of service selection and service combination, applied in the field of member service selection system, which can solve the problems of service quality degradation, cost increase, and low response time.

Inactive Publication Date: 2009-12-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Users always hope that in their own transaction process, the combined service of the virtual market can choose high-quality member services (such as high trust, low response time, and low cost), but when all transaction processes are concentrated on high-quality member services , the service quality provided by member services may change, and with the increase in the number of services provided, the service quality may decline (such as increasing fees), and this change needs to be reflected in the process of member service selection

Method used

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  • Dynamic member service selection method based on descending factors in service combination
  • Dynamic member service selection method based on descending factors in service combination
  • Dynamic member service selection method based on descending factors in service combination

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Embodiment Construction

[0060] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings. In the present invention, the computer is a CPU above Pentium 2, a hard disk above 10G, and an ordinary desktop microcomputer with general computing capability.

[0061] The specific implementation plan is:

[0062] use figure 2 The combined service shown is used as the experimental object (the number of specific services N=200), the information heuristic factor α=1 in the state transition rule, the expected heuristic factor β=2, and the information volatilization coefficient in the pheromone update rule is R=0.1, Maximum number of cycles N s max = 10 , Tr=0.6, C=300, Ti=100, Q 0 = 0.95.

[0063] On the experimental data, in addition to specific services {0, 100, 110, 50, 60, 70, 80, 120, 130, 150, 140, 180}, set a set of optimal parameters (namely...

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Abstract

The invention discloses a dynamic member service selection method based on descending factors in a service combination. The dynamic member service selection method comprises the following steps: important parameters of trust worthiness, response time and cost and the like are utilized to carry out optimization by establishing a simulation model; a request for the combined service is used as input, and a combined service instance manager is created to manage the combined service instance; the combined service instance starts to be executed according to the definition of the combined service; in the starting phase of execution, a member service selector is called to select proper member service according to a model of a selected problem; external member service is called in the execution process of the combined service instance; a specific service of the combined service belongs to a certain service body; the state transfer of the combined service in execution occurs in the specific service instead of the service body; and a pheromone local updating method and a global updating method based on the descending factors are adopted. The dynamic member service selection method can bettersolve the problem of dynamic member service selection in the service combination and has better optimizing effect.

Description

Technical field: [0001] The invention relates to the field of service computing, in particular to a member service selection system in a service combination. Background technique: [0002] Composition of services (Web services or grid services) studies how to combine services into a larger granular service for further composition or direct use by upper-layer applications and users. In the Web or grid, there are a large number of services with the same functional characteristics and different non-functional characteristics. Such services are called service ontology. In order to improve the adaptability of service composition, when defining a composite service, it is not directly bound to a specific service, but to specify a service ontology; when the composite service is executed, the execution component of the service composition (such as the grid service composition execution engine) Realize the binding from the service ontology to specific services. When the service comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08G06N3/00
Inventor 代桂平王勇
Owner BEIJING UNIV OF TECH
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