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Friday, July 23, 2010

PowerPoint Presentation On Location Based Services

 PPT On Location Based Services


Location Based Services Presentation Transcript:
1. What is the location based service? →
A service that depends on the network knowing your location It allow consumers to receive services and advertising based on their geographic location. Eg: businesses can provide information about traffic, restaurants, retail stores, travel arrangements, or automatic teller machines based on the consumer’s location at a particular moment in time. Such services can be provided in response to a consumer’s manual input of his or her location information into the handset or by using so-called “auto-location” technology to track the location of the consumer automatically.

Emergency 911 Navigation Vehicle Assistance (OnStar) Child Finder Advertising Local Search Traffic applications Automotive Vehicle Location (Fleet tracking) Asset Tracking Personnel Tracking Social Mapping Self Guided Tours Finding elderly or individuals with Alzheimers

1.Mobile Devices 2.Positioning 3.Service and content provider 4.Communication Network

4. Applications Traffic Monitoring
How many cars are in the downtown area? Send an alert if a non-friendly vehicle enters a restricted region Report any congestion in the road network Once an accident is discovered, immediately send alarm to the nearest police and ambulance cars Make sure that there are no two aircrafts with nearby paths

5. Applications (Cont.)
Location-based Store Finder / Advertisement Where is my nearest Gas station? What are the fast food restaurants within 3 miles from my location? Let me know if I am near to a restaurant while any of my friends are there Send E-coupons to all customers within 3 miles of my stores Get me the list of all customers that I am considered their nearest restaurant

Whenever any device is in contact with a cell tower, it’s possible to determine which tower and, therefore, the approximate location within a general radius. When it can receive data from two towers, the fix is more accurate but still approximate. Three or more towers provides a reasonably accurate fix. Positioning Techniques 1.GPS 2.Assisted GPS 3.Positoning Principles in Mobiles Cell-ID EOTD

The Global Positioning System (GPS) is actually a constellation of 27 Earth-orbiting satellites (24 in operation and three extras in case one fails). Satellites circle the globe at about 19300 km making two complete rotation everyday. The orbits are arranged so that at anytime, anywhere on Earth, there are atleast four Satellites are "visible" in the sky. A GPS receiver's job is to locate four or more of these satellites, figure out the distance to each, and use this information.

 8. GPS (Global Positioning System)
24 satellites in orbit. Typically 5 to 8 are visible from any one place Device gets fix by triangulating position of satellites. Distance calculated by time it takes for signal to travel from satellite to receiver. Calculating the time it takes from 4 satellites provides an accurate fix.

GPS has a slow time to fix unless it is permanently tracking satellites Assisted GPS is based upon providing GPS satellite information to the handset, via the cellular network Assisted GPS gives improvements in Time to First Fix Sensitivity,Cost Assistance Data Satellite Position Time information Visible GPS List

10. For more please refer our PPT. Thanks.

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