移动应用的自适应文件传输中间件

Mario A. Gomez-Rodriguez, Víctor Jesús Sosa Sosa, I. Lopez-Arevalo
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引用次数: 1

摘要

当前的移动设备(如移动电话和pda)能够运行需要大量存储空间的应用程序。当这些设备用完本地内存时,它们需要在外部存储设备中备份文件,这可能会限制用户的移动性。提出了一种适用于移动应用的自适应文件传输中间件(AFTM)。考虑到服务的质量和成本,该中间件通过访问可用的最佳无线连接(WiFi, GPRS/UMTS),简化了移动设备和外部存储服务器之间的文件传输。AFTM还可以使用多媒体消息服务(MMS)作为传输文件的另一种选择。文件备份服务(FBS)建立在AFTM之上。FBS将检测设备何时耗尽本地内存,并自动将选定的文件从移动设备发送到外部存储服务器,释放移动存储内存。为了决定应该备份哪些文件,FBS实现了几个文件替换策略。结果表明,当需要备份文件时,一种替换策略的选择将在算法效率和可用无线服务成本之间进行权衡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adaptive File Transfer Middleware for mobile applications
Current mobile devices such as mobile phones and PDAs are able to run applications that can demand a considerable storage space. When these devices run out of local memory, they require backing up their files in an external storage device, which could restrict the user mobility. This paper presents an Adaptive File Transfer Middleware (AFTM) for mobile applications. This middleware eases the transfer of files between a mobile device and an external storage server by accessing the best wireless connection (WiFi, GPRS/UMTS) available, considering quality and cost of the service. AFTM is also able to use the Multimedia Messaging Service (MMS) as another option for transferring files. A File Backup Service (FBS) was built on top of the AFTM. The FBS will detect when the device ran out of local memory and will automatically send selected files from the mobile device to an external storage server, freeing the mobile storage memory. To decide which files should be backed up, FBS implements several file replacement policies. Results showed that the selection of one replacement policy will be a trade-off between the efficiency of the algorithm and the cost of the wireless service available when a file needs to be backed up.
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