Study on Communication Cost for Content-Aware Mobile Databases in M-Commerce

• Main Authors: Yi-ren Huang, 黃怡仁
• Other Authors: Chorng-horng Yang
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/15752660758952634067

碩士 === 義守大學 === 資訊管理學系碩士班 === 93 === In recent years, the wireless and mobile communication technology is becoming mature and popular. With the mobile communication service, researchers explore and develop many versatile M-commerce applications such as navigation service, etc. Thus, the content-aware mobile database becomes a crucial research topic. In this thesis, we study the system architecture for the content-aware mobile database for M-commerce and investigate the data replication and caching strategies for such a mobile database. A data replication strategy is employed between central server and local servers, and three caching approaches, i.e., index caching, judicious caching, and pre-fetch caching, are analyzed in this study. Furthermore, we analyze and evaluate the total communication cost of the system through simulation experiments. We set up a simplified model for the mobile database for the simulation study. Our simulation experiments explore how the three parameters, access probability, mobility, and the hit ratio, affect the total communication cost with respect to three different caching approaches. Moreover, we further investigate how the unit cost of communicating through mobile networks affects the total communication cost.