Location-aware Query Processing

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Location-based services (LBS) provide location-aware information to mobile device users through mobile networks and location detection technologies. LBS use several components including mobile devices, positioning platforms, communication networks, service providers, and data providers. Location-aware query processing enables both snapshot queries that retrieve information based on the user's current location, as well as continuous queries that track objects as their locations change over time. Common techniques for location-aware query processing include result validation, caching, prediction, and incremental evaluation.

Technologie

Location-aware Query Process and Location-based Services Yang Gang HU [email_address]

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Five Components of LBS ,[object Object],[object Object],[object Object]

Five Components of LBS (Cont.) ,[object Object],[object Object]

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Location-aware Snapshot Query Processing ,[object Object],[object Object]

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Location-aware Continuous Query Processing ,[object Object],[object Object],[object Object]

Implementation (4 methods) ,[object Object],[object Object],[object Object],[object Object]

Method One: Result Validation ,[object Object],[object Object],[object Object],[object Object]

Method Two: Result caching ,[object Object],[object Object]

Method Three: Result Prediction ,[object Object],[object Object]

Method Four: Incremental Evaluation ,[object Object],[object Object]

Case Study: CareDB ,[object Object],[object Object],[object Object]

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