Real-Time Query Services for Mobile Users
As large-scale wireless sensor networks make it possible to monitor physical environments at unprecedented spatial and temporal granularities, a key research challenge is to develop data services that deliver information to mobile users at the right time and right location. In this project, we have developed MobiQuery, a real-time query service that allows mobile users to periodically query the physical environment through wireless sensor networks. The key challenge for MobiQuery is to meet stringent spatiotemporal performance constraints crucial to many critical applications, including query latency, data freshness, and changing areas of interest due to user mobility. We have designed several just-in-time prefetching protocols that enable MobiQuery to maintain robust spatiotemporal guarantees despite low node duty cycles. Furthermore, they significantly reduce storage cost and network contention. A prototype implementation of MobiQuery on Berkeley motes and an Acroname PPRK robot has been demonstrated at Sensys 2004.
Publications
Guoliang Xing, Sangeeta Bhattacharya, Chenyang Lu, Octav Chipara, Chien-Liang Fok, Gruia-Catalin Roman, Design and Analysis of Just-in-Time Prefetching Protocols for MobiQuery, submitted to ACM Transactions on Sensor Networks.
A Spatiotemporal Query Service for Mobile Users in Sensor Networks, Chenyang Lu; Guoliang Xing; Octav Chipara; Chien-Liang Fok; Sangeeta Bhattacharya, International Conference on Distributed Computing Systems (ICDCS), Columbus, OH, 2005.
Sangeeta Bhattacharya, Guoliang Xing, Chenyang Lu, Gruia-Catalin Roman, Brandon Harris, and Octav Chipara, "Dynamic Wake-up and Topology Maintenance Protocols with Spatiotemporal Guarantees," International Conference on Information Processing in Sensor Networks (IPSN'05), Los Angeles, CA, April 2005.
Sangeeta Bhattacharya; Octav Chipara; Brandon Harris; Chenyang Lu; Guoliang Xing; Chien-Liang Fok, Demo Abstract: MobiQuery - A Spatiotemporal Data Service for Sensor Networks, ACM Conference on Embedded Networked Sensor Systems (SenSys'04), Baltimore, MD, November 2004.
People
Prof. Chenyang Lu
Prof. Gruia-Catalin Roman
Sangeeta Bhattacharya
Octav Chipara
Chien-liang Fok
Last updated on 03/31/2006