Location-aware Computing By Bonam Kim. Outline Introduction Motivation Location Determination Techniques Location-aware Services Example for Implementation.

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Presentation transcript:

Location-aware Computing By Bonam Kim

Outline Introduction Motivation Location Determination Techniques Location-aware Services Example for Implementation Conclusion

1.Introduction A key aspect for the mobility of these applications is given by the ability to determine the user’s location. Location-aware services allow to offer value- added service to the user, depending on their current geographic position.

2.Motivation Location-aware services are becoming a key feature to provide tailor-made applications in wireless networks Due to new and improved features of mobile devices and applications, the mobile markets in the past few years have seen a remarkable boom Mobile application will continue to form an important and expanding industry in the future.

3.Location determination techniques Pioneering work Current techniques

Pioneering work (Location determination continue) Active Badge 1. designed and prototyped between 1989 and The first location-based application in computer science literature PARCTab 1. development since the first location-based applications on a PDA- class device

1. Active Badge ( Location determination continue ) The first version With a unique five bit code The second version With a ten bit code The third, current version With a 48 bit code, bi-directional capabilities On-board 87C751 microprocessor

2. PARKTab ( Location determination continue ) Xerox PARCTab, the first content-aware personal digital assistant

Current Techniques E911 GPS Short-range radio

E911 Selective Routing (SR) Routes 911 emergency calls to the proper Public Safety Answering Point (PSAP) based on the emergency service number assigned to the caller’s address. Automatic Number Identification (ANI) Provides the calling party’s seven digit telephone number on the display at the PSAP. Automatic Location Identification (ALI) Provides the name and address associated with the calling party’s telephone number on the display at the PSAP.

E911 (Enhanced 911) The Belmont County, Ohio, Enhanced Communications Center

GPS (Global Positioning System) The most popular option of obtaining location information today. GPS lets suitably equipped receivers determine their position within 10 meters. It is generally not workable indoors.

GPS Trimble GeoExplorer II The Casio Pathfinder GPS watch

Short-range radio Bluetooth location-based services Bluetooth is a specification for a small-form factor, low-cost radio solution providing links between mobile computers, mobile phones and other portable handheld devices, and connectivity to the internet.

Bluetooth short-range radio Ericsson’s R520M Bluetooth-enabled cell phone

Wireless GPS/Bluetooth Receiver for Mobile Terminals The world’s first integrated Bluetooth wireless and GPS receiver one for mobile devices

4.Location-aware Services DealFinder comMotion GITTCS

DealFinder: Mobil Shopping Guide A position-aware shopping application for mobile devices Share information about product prices and availability For instance a person comparison-shopping for television sets at different local electronic stores can use DealFinder to “upload” prices to our public database. Other shoppers who will are looking for a similar television set will be able to find prices on TV sets, based on their location.

comMotion comMotion gradually learns about the location in its user’s daily life based on travel patterns. GPS position sensing Map display and graphical user interface comMotion can provide maps showing the user’s current position together with neighbourhood lacales such as banks, movie theatres or grocery stores.

GITCS (Ground Intermodal Traffic control system) Apply it to the Huntsville intermodal terminal Based on real time vehicle positioning system using GPS Server/client system Wireless LAN

GITCS System Architecture GPS Receiver Real time GPS data Real Time GPS Integrated Client System Digital Map Message Tool Real Time GPS Integrated Server System Real Time Display Real Time Replay GPS Positioning data Communication Recorded Data Real Time Display Digital Map Message Tool Real Time Replay

GITCS Implementation WLAN

5.Conclusion This presentation provides a comparison of the technologies underlying most of the location-aware computer systems in use today.

Questions?