| 摘要: |
| 提出一种多目标的数据预取方法(multiple goals oriented data prefetching,简称MGODP)来满足不同用户的数据预取需求.MGODP不仅从用户偏好出发为其预取合适量的数据,而且从服务器角度出发,对于Client/ Server模式下的数据访问提出全局合作的方法,以大幅度提高服务质量.另外,MGODP提供了移动客户端和服务器之间平衡工作负载的合作机制,合理分配系统资源,保障系统性能.通过一系列实验可以看出,MGODP方法能够很好地满足不同用户的需求,并通过全局合作和负载均衡机制在保证用户性能需求的前提下,尽可能地减小对电池电量和网络带宽的消耗. |
| 关键词: 数据预取 用户偏好 上下文可感知 移动计算 全局协作 |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60503029, 90412011 (国家自然科学基金); the National High-Tech Research and Development Plan of China under Grant Nos.2007AA01Z133, 2009AA01Z139 (国家高技术研究发展计划(863)); the National Basic Research Program of China under Grant No.2005CB321805 (国家重点基础研究发展计划(973)) |
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| Globally Adaptive Data Prefetching Mechanism for Mobile Network Applications |
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ZHANG Xiao-Wei,CAO Dong-Gang,TIAN Gang,CHEN Xiang-Qun
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| Abstract: |
| This paper presents an approach named Multiple Goals Oriented Data Prefetching (MGODP) to satisfy the data prefetching requirements from different users. MGODP does not only take the user preferences into account to prefetch appropriate amounts of data, but also adopts global coordination for Client/Server data access model to greatly improve the quality of service from the server’s perspective. Moreover, MGODP balances the workload between the mobile client and the backend server to achieve proper allocation of resources and to guarantee the system performance. Experimental results demonstrate that MGODP could satisfy diverse user requirements, and reduce the consumption of battery energy and network bandwidth through global coordination and workload balance. |
| Key words: data prefetching user preference context-aware mobile computing global coordination |
