Location-aware Computing
description
Transcript of Location-aware Computing
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 workCurrent techniques
Pioneering work (Location determination continue)
Active Badge 1. designed and prototyped between 1989 and 1992.
2. The first location-based application in computer science literature
PARCTab 1. development since 1992
2. the first location-based applications on a PDA- class device
1. Active Badge (Location determination continue)
The first versionWith a unique five bit code The second version
With a ten bit code
The third, current versionWith 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 9-1-1 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 R520MBluetooth-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
GPSReceiver
Real timeGPS data
Real Time GPSIntegrated Client System
DigitalMap
Message Tool
Real Time GPSIntegrated ServerSystem
Real TimeDisplay
Real TimeReplay
GPS Positioning dataCommunication
RecordedData
Real TimeDisplay
DigitalMap
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?