QoS prediction-based service combination method and QoS prediction-based service combination device

Abstract

The invention provides a QoS prediction-based service combination method and a QoS prediction-based service combination device. The method comprises the following steps: acquiring a workflow model meeting the functional requirement and non-functional requirement of a user, and resolving the workflow model to obtain each structural body, wherein the structural body comprises at least one alternative service; obtaining predicted QoS values of the alternative services corresponding to each structural body at a preset execution time, and taking the alternative services with optimal predicted QoS values as executed services of the corresponding structural bodies, wherein the executed service is the alternative service to be selected for execution when the structural body is executed; and at the preset execution time, executing the executed services of each structural body in the workflow model by a service execution engine. The technical scheme of the invention performs service combinationbased on QoS prediction so as to execute the services at future execution times according to predicted service combinations, reduce service combination execution time and improve service combination execution efficiency.

Description

technical field [0001] The invention relates to the technical field of computer networks, in particular to a service combination method and device based on QoS prediction. Background technique [0002] With the wide application and development of Internet technology, there are more and more resources on the network, and there are more and more various services. Service providers hope to combine existing services to form more powerful value-added services. Services are provided to users to meet the needs of business diversification. [0003] Among them, Web service technology is a technology for distributed software development, deployment and integration, which can provide unified function representation, sharing, integration and information exchange processing for various software applications on the network. Therefore, distributed software can be realized based on the Web. The integration of data, applications and systems in , dynamic and heterogeneous environments makes ...

AI Technical Summary

Problems solved by technology

The dynamic combination of services can improve the flexibility and dynamic adaptability of combined services, but it needs to dynamically search and bind services during service execution, and as the service scale increases, the search efficiency will drop significantly, resulting in The combined service takes a long time to execute, resulting in poor real-time performance of the service and affecting the use of users

[0006] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: the existing Web service-based dynamic combination method is to dynamically query, select and combine the services when executing the services, so as to obtain the The service to be executed during execution, that is, the service needs to dynamically communicate with the service registry during execution, and search for the required service according to the predetermined strategy. It takes a lot of time to find the service and perform service combination, and the time for service execution is relatively short. Long, poor service execution efficiency, poor real-time service provision, affecting the effect of users using services

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