Energy-Efficient Shortest Path Query Processing on Air
Conference Proceeding Article
In this paper, we study a new form of reverse nearest neighbor (RNN) queries, i.e., obstructed reverse nearest neighbor (ORNN) search. It considers the impact of obstacles on the distance between objects, which is ignored by the existing work on RNN retrieval. Given a data set P, an obstacle set O, and a query point q in a 2D space, an ORNN query finds all the points/objects in P that have q as their nearest neighbor, according to the obstructed distance metric, i.e., the length of the shortest path between two points without crossing any obstacle. We formalize ORNN search, develop effective pruning heuristics (via introducing a novel boundary region concept), and propose efficient algorithms for ORNN query processing, assuming that both P and O are indexed by traditional data-partitioning indexes (e.g., R-trees). Extensive experiments demonstrate the effectiveness of our developed pruning heuristics and the performance of our proposed algorithms, using both real and synthetic datasets.
Databases and Information Systems
Proceedings of the 19th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (GIS '11)
JING, Yinan; CHEN, Chunan; SUN, Weiwei; ZHENG, Baihua; LIU, Liang; and TU, Chuanchuan.
Energy-Efficient Shortest Path Query Processing on Air. (2011). Proceedings of the 19th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (GIS '11). 393-369. Research Collection School Of Computing and Information Systems.
Available at: https://ink.library.smu.edu.sg/sis_research/1458