Processing transitive nearest-neighbor queries in multi-channel access environments

Wireless broadcast is an efficient way for information dissemination due to its good scalability [10]. Existing works typically assume mobile devices, such as cell phones and PDAs, can access only one channel at a time. In this paper, we consider a scenario of near future where a mobile device has the ability to process queries using information simultaneously received from multiple channels. We focus on the query processing of the transitive nearest neighbor (TNN) search [19]. Two TNN algorithms developed for a single broadcast channel environment are adapted to our new broadcast enviroment. Based on the obtained insights, we propose two new algorithms, namely Double-NN-Search and Hybrid-NN-Search algorithms. Further, we develop an optimization technique, called approximate-NN (ANN), to reduce the energy consumption in mobile devices. Finally, we conduct a comprehensive set of experiments to validate our proposals. The result shows that our new algorithms provide a better performance...

• Type: Conference
• Year: 2008
• Where: EDBT
• Authors: Xiao Zhang, Wang-Chien Lee, Prasenjit Mitra, Baihua Zheng
• Keywords: Approximate Nearest Neighbor, Database, EDBT 2008, TNN Algorithms, Transitive Nearest Neighbor