Approaches for broadcasting temporal data in mobile computing systems

Rapid advances in mobile communication technology have spawned many new mobile applications. A key element in many of these systems is the need to distribute real-time information from a database server to mobile clients. While data broadcast has been shown to be an efficient data dissemination technique, many issues such as selection of broadcast data and caching strategies at mobile clients are still active research areas. In this paper, we consider an important characteristic of many mobile computing systems which has often been ignored in the design of broadcast algorithms: the fact that many data items are associated with temporal constraints on their validity. We introduce the notion of Absolute Validity Interval (AVI) to capture the temporal constraints of the data items, formulate a temporal data model and examine both static and dynamic approaches to select data items based on their access frequencies as well as their AVI. The reason for considering the AVI of the data items ...

• Type: Journal
• Year: 2000
• Where: JSS
• Authors: Kam-yiu Lam, Edward Chan, Joe Chun-Hung Yuen
• Keywords: Data Item, JSS 2000, Mobile Communication Technology, Temporal Constraints