【摘要】 频繁断连性、通信不对称性、用户数据访问模式多变性、移动终端能源有限性是移动计算环境的典型特征。如何能在如此“苛刻”的条件下保证移动终端的数据访问高效性、时效性是研究重点。从数据广播技术、数据预取技术和数据缓存技术3方面进行研究,从而提高移动计算环境中数据访问的性能。更多还原

【Abstract】 In mobile computing environment,the communication is asymmetric,the link is broken off frequently,and the user access pattern is diversity.How can get the data which the user concerned effectively,timely is the center of this paper.Data broadcast,data prefetch,cache replacement are researched.The simulationresult show that the algorithm isoperationaland scalability.Using thistech-nology enhance the performance of the data access in mobile computing environment.更多还原