In an open and dynamic cloud computing environment, the randomness of cloud services with unreliable quality leads to low accuracy in service composition. To address the above problem, this paper proposes a global trust service composition approach based on random QoS and trust evaluation, considering the multi-criteria assessment of service quality. Firstly, statistical test is employed to remove the uncertain outliers and to estimate the ideal value of the collected objective QoS data. Secondly, subjective QoS evaluations of providers and users are aggregated according to direct trust and recommended trust. Finally, services are composed through global QoS optimization. Experiments for each stage show that the approach improves the accuracy and precision of service composition.
목차
Abstract 1. Introduction 2. Related Work 3. Outlier Test of Objective QoS 4. Evaluation Models of subjective QoS 4.1. QoS Evaluation based on Direct Trust 4.2. QoS Evaluation based on Recommended Trust 5. Global Optimal Service composition 6. Experiment Results and Discussions 6.1. Comparing Subjective Evaluation of QoS Data 6.2. Comparing Subjective Evaluation of QoS Data 6.3. Comparing Optimal Degree and Deviation of Service Composition 7. Conclusion References
키워드
cloud computingservice compositionquality of servicemulti-criteriahypothesis testglobal optimization
저자
Weina Lu [ School of Automation Science and Electrical Engineering, Beihang University, Department of Mechanics and Electronics, Hebei Normal University of Science and Technology, Changli, Hebei, 066600, China ]
Xiaohui Hu [ School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China ]
Shangguang Wang [ State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China ]
Xiaotao Li [ School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China ]
보안공학연구지원센터(IJGDC) [Science & Engineering Research Support Center, Republic of Korea(IJGDC)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Grid and Distributed Computing
간기
격월간
pISSN
2005-4262
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Grid and Distributed Computing Vol.7 No.1