计算机应用 ›› 2005, Vol. 25 ›› Issue (01): 186-187.DOI: 10.3724/SP.J.1087.2005.0186

• 网络与通信 • 上一篇    下一篇

基于PDA与PC数据传输同步协议可扩展的研究

苟艳,陈泳章   

  1. 重庆大学计算机学院
  • 发布日期:2005-01-01 出版日期:2005-01-01

Research on the scalability of data synchronization protocols based on PDA and PC

GOU Yan, CHEN Yong-zhang   

  1. Department of Computer Science and Engineering, Chongqing University
  • Online:2005-01-01 Published:2005-01-01

摘要:

为了维持PDA与PC之间的数据一致性,通常采用数据同步协议来达到目的。但是由于移动网络资源环境如:带宽、内存,以及处理能力低等条件,限制了这些协议的可操作性。文中基于最近的信息理论研究基础上引入了一种新的PDA同步模型协议(CPISync),该协议最突出的特点是:PDA与PC通讯代价的复杂度依赖于它们之间不同的数据量而不是PDA上所有记录的数量。而且,实验显示,在一定的条件下CPISync协议实际的计算复杂度和资源消耗量,以及它整体的延迟都比传统的同步协议小,起到了对传统协议的扩展的功能。因此,CPISync协议对提高PDA在大型的,异构,无线网络中的同步效率发挥了巨大的作用。

关键词: PDA, 数据同步, 移动计算

Abstract:

Personal Digital Assistants and Personal Computers often utilize synchronization protocols in order to maintain data consistency. These protocols operate in environments where network resources such as bandwidth, memory, and processing power are limited. In this paper a novel PDA synchronization scheme(CPISync) predicated upon recent information-theoretic research was introduced. The characteristic of this scheme was that its communication complexity depended on the number of differences between the PDA and PC. Moreover, experiments showed that the computational complexity and energy consumption of CPISync were practical and that the overall latency was typically much smaller, which played an important role in their scalability. Thus, CPISync had a potential of significantly improving synchronization efficiency for PDAs on large, heterogeneous, wireless networks.

Key words: PDA, data synchronization, mobile computing

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