Method for evaluating spatial information service quality and optimizing service chain

Abstract

The invention discloses a method for evaluating spatial information service quality and optimizing a service chain. The method comprises the following steps: establishing a spatial information service element evaluation system at first, obtaining various element values through a service agent, and publishing finally quantified result data to a directory service centre. On the basis of directory service quality data, a spatial information service chain ensures that the whole QoS of the service chain is optimal through static optimization in a construction process and dynamic optimization in an operation process; the static optimization is as follows: an optimal service combination is searched by utilizing an optimization selection algorithm when local and global QoS constraint conditions are satisfied; and a specific server is bound to an abstract model; and the dynamic optimization is as follows: the service chain is dynamically monitored in the service chain operation process; the found QoS abnormal change condition is re-planed; and thus, smooth execution of the service chain is ensured. The method disclosed by the invention can assist users to find and select high-quality spatial information services from similar services so as to complete complex geographical processing tasks.

Description

technical field [0001] The invention belongs to the technical field of network geographic information system application, and in particular relates to a spatial information service quality evaluation and service chain optimization method. Background technique [0002] With the development and registration of a large number of spatial information services in the network environment, it is inevitable that there will be many spatial information services with the same function. For example, by following the standard spatial information processing service interface, different organizations can provide their own remote sensing image classification services , however the quality of these services varies. How to evaluate the quality of spatial information services and provide references for the selection of spatial information services is a scientific problem that needs to be solved urgently. [0003] In the field of general-purpose computers, many evaluation index systems have bee...

AI Technical Summary

Problems solved by technology

[0007] Existing service chain optimization schemes that consider QoS focus on the construction stage of the service chain, and seldom involve the dynamic optimization of the service chain during operation

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