이동 데이터 서비스에서 동적인 데이터 요청패턴을 지원하는 효율적인 데이터 방송 시스템

An Efficient Data Broadcast System Supporting Dynamic Data Request Patterns in Mobile Data Services

In wireless environments, it is very effective to introduce a data broadcast system for providing a number of clients with mobile data services. In particular, an efficient broadcast scheduling and a caching strategy are very important for performance of data broadcast systems I wireless environments which have such inherent restrictions as low bandwidth, frequent disconnections, and short battery life. In this paper, we present a data broadcast scheduling strategy using bit vectors to cope with dynamic request patterns of clients. In addition, we also propose an efficient caching strategy, 2FWT, that takes characteristics of the broadcast scheduling strategy into. Finally, we evaluate performance of the data broadcast system. According to the results, the proposed system generally shows better performance than others.