DSI: A fully distributed spatial index for wireless data broadcast Wang-Chien Lee and Baihua Zheng   View Paper (PDF)   Return to Research Session 12: Mobility Abstract To support location-based services in wireless data broadcast systems, a distributed spatial index (called DSI) is proposed in this paper. DSI is highly efficient because it has a linear yet fully distributed structure that naturally facilitates multiple replications of the index by sharing links in different search trees. Search algorithms for point queries, window queries, and kNN queries, based on DSI are presented. Empirical evaluation of DSI are conducted. Result shows that DSI significantly out-performs R-tree and Hilbert curve index, two state-of-the-art spatial indexing techniques for wireless data broadcast. ©2006 Association for Computing Machinery