CONTEXT-BASED QOS MODEL AND ITS APPLICATION IN UBIQUITOUS COMPUTING

摘要：

In the mobile and resource-constrained ubiquitous computing environments, we need an effective Quality of Service (QoS) model to support dynamic service selection in tune with the variation of context. To serve this purpose, we explore the concept of QoS and propose a context-based QoS model with hierarchical structure. Based on the context model,the QoS model can identify different types of context and evaluate the impact of context upon service selection through first-order logic inference and fuzzy logic evaluation.Quantitative methods are employed to quantify quality factors. The application of the model is demonstrated in the process of service selection. Two experiments have been conducted to evaluate the model. The result of the experiments has proved that with the application of the QoS model, service selection is of better scalability and performance.

关键词： Context ubiquitous computing QoS model service selection FOL inference fuzzy logic evaluation

作者: YONG ZHANG SHEN-SHENG ZHANG SONG-QIAO HAN

作者单位: Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

会议类型: 国际会议

会议名称: 2006 International Conference on Machine Learning and Cybernetics(IEEE第五届机器学习与控制论坛)

会议地点: 大连

会议语种:英文

页码: 1517-1521

在线出版日期: 2006-08-13（万方平台首次上网日期，不代表论文的发表时间）