Power Conservative Multi-Attribute Queries on Data Broadcast Q. Hu, W.-C. Lee, and D. Lee   View Paper (PDF)   Return to Mobile and Embedded Systems Abstract In this paper, we study power conservation techniques for multi-attribute queries on wireless data broadcast channels. Indexing data on broadcast channels can improve client filtering capability, while clustering and scheduling can reduce both access time and tune-in time. Thus, indexing techniques should be coupled with clustering and scheduling methods to reduce the battery power consumption of mobile computers. In this study, three indexing schemes for multi-attribute queries, namely, index tree, signature, and hybrid index, are discussed. We develop cost models for these three indexing schemes and evaluate their performance based on multi-attribute queries on wireless data broadcast channels. DiSC'01 Copyright ©2002 ACM Inc.