基于QoS的卫星信息应用链服务调度方法

服务调度问题是卫星信息应用链功能结构设计完成之后必须解决的问题．在卫星信息应用链服务调度问题的相关概念进行描述之后，提出了卫星信息应用链的服务质量参数体系，为链的性能评价和服务选择提供了依据，并在此基础上建立了卫星信息应用链的服务调度问题的数学模型，提出了一种基于GA的服务调度算法．实验结果表明，本文所提出的服务质量参数体系能有效解决应用链性能评估问题，基于QoS的卫星信息应用链服务调度方法可行性较强．

QoS-Based Service Scheduling Method of Satellite Information Application Chain

The problem of service scheduling is proposed after the design of structure and function of Satellite Information Application Chain(SIAC). After introducing some basic conceptions about the service scheduling problem of SIAC, the QoS parameters of SIAC and the calculus algorithms are discussed, which can be used as criterions for performance evaluation and service selection of SIAC. After that, the mathematical model of service scheduling problem of SIAC is established, and service scheduling algorithms based on GA are presented. The experimental results indicates the proposed QoS parameters are effective for the evaluation of SIAC and the QoS-based method used for SIAC service scheduling is feasible.