An Adaptive Service Composition Method Based on Wireless Sensor Networks

Abstract

The invention discloses an adaptive service combination method which is applied to a multi-robot Ad Hoc network and used for evaluating a selected service combination through fuzzy trust-level evaluating and optimizing the selected service combination. In the process of searching for a service combination plan, multiple solution ways can be possibly found; and at the moment, good and bad of the resolutions need to be judged according to an adaptation criterion to achieve service optimization; in the adaptive service combination mode, agent robots are used for organizing and managing various resources and services in a network environment and being in charge of selecting a service combination strategy related to a specific environment from a stored service combination strategy set to achieve adaption of the service combination; meanwhile, a rule is dynamically generated by adopting a machine learning method, rule inference is conducted by using a fuzzy inference technology, and then thedynamic level of the service combination is achieved; on the basis, a fuzzy synthesis mechanism for the trust level and a fuzzy evaluation algorithm for the trust level are provided, and a machine learning-based fuzzy trust-level evaluating system (FTEs) is achieved; and finally, the service combination is evaluated by applying a reinforcement learning method, feedback is used for judging the service combination mode adopted in the next planning process, and therefore the evaluation effect is more ideal.

Description

technical field [0001] The invention relates to the field of information technology, in particular to an adaptive service combination method based on a wireless sensor network. Background technique [0002] Wireless ad hoc network is a new type of network that has emerged with the rapid development of wireless communication technology in recent years. All nodes in the network can move arbitrarily, the network topology changes dynamically, and the nodes communicate in a multi-hop cooperative manner. As a network without infrastructure, wireless ad hoc networks have broad application prospects in both military and civilian applications, and are currently a hot area of ​​network research. Service composition refers to the technology of combining several simple services into a more complex and meaningful service, that is, the process of completing a complex task through the mutual cooperation of several simple services. The work of existing service composition is mainly concent...

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Problems solved by technology

[0004] I. The distribution, dynamics, heterogeneity of services and the continuous dynamic evolution of the service environment affect the correctness, security, reliability and other service quality of service composition. The planning generated in the process of service selection and service composition is all Static planning, resulting in failure-prone service execution

[0005] II. Ad-hoc networks have the characteristics of unstable communication, limited bandwidth, and low terminal performance. If wireless users want to obtain service resources of fixed networks, they must be constrained by the wireless environment and cannot bear the constraints brought by fixed network service technologies. load effect

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