| SOA关键型系统QoS可感知的服务动态实时组合策略 |
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| 引用本文： | 张奕,蔡皖东.SOA关键型系统QoS可感知的服务动态实时组合策略[J].计算机应用,2011,31(7):1984-1987. |
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| 作者姓名： | 张奕 蔡皖东 |
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| 作者单位： | 西北工业大学 计算机学院，西安 710072 |
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| 摘 要： | 针对运行于开放、不确定环境下SOA架构的多使命复杂关键型系统，提出了一个QoS可感知的服务动态组合体系结构及启发式服务实时组合算法，用于满足具有严格QoS限制的复杂用户需求。利用所提出的体系结构可以在线执行服务组合，大大提高了SOA关键型系统的灵活性。通过启发式算法解决了以往服务组合算法时间复杂度的NP难题，最后通过一组实验证明该启发式算法的实时性和具体优化结果。
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| 关 键 词： | 面向服务架构体系 服务 组合算法 安全/使命关键系统 服务质量 |
| 收稿时间： | 2011-01-04 |
| 修稿时间： | 2011-02-27 |
QoS-aware service dynamic real-time composition algorithm for SOA-based critical systems |
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| ZHANG Yi,CAI Wan-dong.QoS-aware service dynamic real-time composition algorithm for SOA-based critical systems[J].journal of Computer Applications,2011,31(7):1984-1987. |
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| Authors: | ZHANG Yi CAI Wan-dong |
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| Affiliation: | School of Computer Science and Technology,Northwestern Polytechnical University,Xi’an Shaanxi 710072,China |
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| Abstract: | SOA-based distributed and embedded safety & mission system (DESMCS) executes in open environments which have different dependability requirements. This paper presents a model for QoS-aware inline service composition in SOA-based DESMCS. QoS-aware service composition is a key requirement in SOA-based DESMCS since it enables fulfilling complex user requirements while meeting strict QoS constraints. The improved heuristic search algorithm solved the NP-hard challenging issue which is the selection of the best set of services to meet global QoS constraints imposed by the user. This paper also presents a set of experiments conducted to evaluate the efficiency of our algorithm, which shows its timeliness and optimality. |
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