Mobilaction: a mobile transaction framework supporting spatial replication and spatial consistency

摘要

Previous research in the area of mobile transactions has mainly concentrated in developing schemes for processing conventional transactions, location management, and data broadcast. No one has examined how such mobility issues as location dependent data (LDD) impact the actual definition of a transaction in the mobile computing environment. There is a distinct lack of work related to how LDD impacts consistency and transactions. The objective of this paper is to fill this void and identify the future requirements of complete ubiquitous data processing systems. First we examine the effect of mobility on transaction processing and commitment, specifically examining the impact of location dependent data. Next we discuss and analyze a number of application and system level issues and present our solutions for some of the problems. In particular we develop a transaction model called "Mobilaction" for the mobile database systems, propose new commitment protocols for Mobilactions and present a formal treatment of consistency in the presence of LDD. Our work presented opens up a new direction in mobile computing data processing research.