5 lbs - Location Based Services Mobile Computing - CNT...

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Location Based Services Mobile Computing - CNT 5517-5564 Dr. Sumi Helal Professor Computer & Information Science & Engineering Department University of Florida, Gainesville, FL 32611 helal@cise.ufl.edu
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2 Reading Materials Paolo Bellavista, Axel Küpper and Sumi Helal “Location Based Services – Back to the Future,” the Standards, Tools and Emerging Technologies Department, IEEE Pervasive Computing Magazine, Sumi Helal, Editor, Volume 7, Number 2, April-June 2008 Roxin, A., Dumez, C., Wack, M., and Gaber, J. 2008. Middleware models for location-based services: a survey. In Proceedings of the 2nd international Workshop on Agent-Oriented Software Engineering Challenges For Ubiquitous and Pervasive Computing (Sorrento, Italy, July 06 - 06, 2008). AUPC '08. ACM, New York, NY, 35-40. C. Lee, A. Helal and D. Nordstedt, "μJini Proxy Architecture for Impromptu Mobile Service Access," Proceedings of the Workshop on Next Generation Service Platforms for Future Mobile Systems (SPMS 2006). In conjunction with the IEEE/IPSJ International Symposium on Applications and the Internet (SAINT), Phoenix, Arizona, January 2006. ( pdf )
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Overview What is LBS? What is impromptu LBS? Examples Why did LBS not take off for the past 10 years? LBS Evolution Today’s LBS classification LBS Middleware Service Discovery Service Delivery Some ongoing research 3
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Location Based Services A service whose rendering depends on the location of the service requester, service provider or both Mobile, networked Applications Input: geo references from Assisted GPS system Client/server interaction Output: Location relevant Information Example: weather, tourist information, . .
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Elements of LBS Querying Advertisement Discovery Delivery Localization Management No installs Lease / Release Location Privacy 5
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Impromptu LBS
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Impromptu LBS
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Impromptu LBS
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Why Difficult to Believe LBS did not take off?
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Great Phones/ Great B/W 2.5-3G  Mobile Phones shown GPRS, EDVO, UMTS, … 500-800 K speed Who needs Hot Spots! 
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The WiMAX Possibility Wireless & Mobile Broadband at 10-30 miles range The Fat Pipe problem. Mobile TV: no thank you!
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Commoditization Pressure The Skype Phenomena VoIP as a cheaper mobile phone service Signs of commoditization of the Telecom Industry? pressure on Telecom to explore new sources of revenues (= New Services).
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Early LBS (1) Content-Centric Current LBSs are content-oriented and lack the  logic necessary for user interactivity (no user  models captured in the service)  Content could be boring! And has limited impact as  compared to interactions Content-centricity was not by choice, it was more of  a constraint. Downloading content was what is  available, and was challenging enough (e.g. WAP  performance)
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Early LBS (2) Precision of the Localization subsystem Cellular triangulation useful for some applications  but inadequate for others.  On-board GPS (e.g., Assisted GPS) offers better 
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This note was uploaded on 10/19/2009 for the course CNT 5517 taught by Professor Helal during the Fall '09 term at University of Florida.

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5 lbs - Location Based Services Mobile Computing - CNT...

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