A novel hash-based streaming scheme for energy efficient full-text search in wireless data broadcast
DASFAA'11 Proceedings of the 16th international conference on Database systems for advanced applications - Volume Part I
A survey on energy-efficient data management
ACM SIGMOD Record
Processing generalized k-nearest neighbor queries on a wireless broadcast stream
Information Sciences: an International Journal
Fast data access and energy-efficient protocol for wireless data broadcast
Wireless Communications & Mobile Computing
An air indexing method for encrypted XML data broadcast in mobile wireless network
Proceedings of the 12th International ACM Workshop on Data Engineering for Wireless and Mobile Acess
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In wireless mobile computing environments, broadcasting is an effective and scalable technique to disseminate information to a massive number of clients, wherein the energy usage and latency are considered major concerns. This paper presents an indexing scheme for the energy- and latency-efficient processing of full-text searches over the wireless broadcast data stream. Although a lot of access methods and index structures have been proposed in the past for full-text searches, all of them are targeted for data in disk storage, not wireless broadcast channels. For full-text searches on a wireless broadcast stream, we firstly introduce a naive, inverted list-style indexing method, where inverted lists are placed in front of the data on the wireless channel. In order to reduce the latency overhead, we propose a two-level indexing method which adds another level of index structure to the basic inverted list-style index. In addition, we propose a replication strategy of the index list and index tree to further improve the latency performance. We analyze the performance of the proposed indexing scheme with respect to the latency and energy usage measures, and show the optimality of index replication. The correctness of the analysis is demonstrated through simulation experiments, and the effectiveness of the proposed scheme is shown by implementing a real wireless information delivery system.