多策略QoS感知的服务选择与排序模型

doi:10.3969/j.issn.1000-436x.2012.z1.018

Abstract

Abstract:

As the increment of services with same function and different QoS in the internet,in order to select and rank the services that fulfill users’ functionality requirements and QoS requirements,a multi-strategy QoS-aware service ranking and selection approach is presented.Considering service performance,and service operation,maintenance costs,an extended Web service QoS model was developed.To determine how well a service satisfies users’and operators’ concerned QoS requirements,a set of functions is presented to normalize services’QoS on various QoS aspects with different metrics and scales,also to compute services satisfaction scores ,and to combine the users’satisfaction scores and the operators’scores together as an overall satisfaction scores based on certain strategy.A prototype system was built for service selection and ranking,and the model above was verified through an application case.

Key words: quality of service, multi-strategy, service ranking

Lei WU,Yu-long LIU,Shi-jun LIU. Multi-strategy QoS-aware service selection and ranking model[J]. Journal on Communications, 2012, 33(Z1): 141-147.

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References 13

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QoS	下限	上限	权重
吞吐量	1Mbit/s	Max	0.6
延迟	Min	200ms	0.6
安全性	60%	Max	0.8
价格	Min	5元/天	1.0

服务 /	吞吐量(Mbit·s^?1)	延迟/ms	安全性	价格/(元/天)	系统成本	人力成本
S1	0.5	30	0.88	3	0.4	1.2
S2	4	50	0.92	5	1.5	1.5
S3	1.3	120	0.98	6	1.2	1.3
S4	2	100	0.95	4	0.8	1.7
S5	1	200	0.96	3	0.5	1.5

服务 /	吞吐量(Mbit·s^?1)	延迟/ms	安全性	价格/(元/天)	系统成本	人力成本
S2	4	50	0.92	5	1.5	1.5
S4	2	100	0.95	4	0.8	1.7
S5	1	200	0.96	3	0.5	1.5

服务	用户满意度	运营商满意度
S2	1.2	2
S4	1.7	1.5
S5	1.8	1

服务	w₁∶w₂
服务	1∶0	0∶1	0.5∶0.5	0.3∶0.7
S2	0.667	1	0.833	0.9
S4	0.94	0.75	0.846	0.807
S5	1	0.5	0.75	0.65

Multi-strategy QoS-aware service selection and ranking model

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