Route-saver: Leveraging route APIs for accurate and efficient query processing at location-based services

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


Location-based services (LBS) enable mobile users to query points-of-interest (e.g., restaurants, cafes) on various features (e.g., price, quality, variety). In addition, users require accurate query results with up-to-date travel times. Lacking the monitoring infrastructure for road traffic, the LBS may obtain live travel times of routes from online route APIs in order to offer accurate results. Our goal is to reduce the number of requests issued by the LBS significantly while preserving accurate query results. First, we propose to exploit recent routes requested from route APIs to answer queries accurately. Then, we design effective lower/upper bounding techniques and ordering techniques to process queries efficiently. Also, we study parallel route requests to further reduce the query response time. Our experimental evaluation shows that our solution is three times more efficient than a competitor, and yet achieves high result accuracy (above 98 percent).
Original languageEnglish
Article number6816049
Pages (from-to)235-249
Number of pages15
JournalIEEE Transactions on Knowledge and Data Engineering
Issue number1
Publication statusPublished - 1 Jan 2015


  • Query processing
  • Spatial databases

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Computational Theory and Mathematics


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