Cellular Geolocation

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CELLULAR GEOLOCATION

B Tech Seminar Report 2011

Presented by TOM SHERON

Department of Electrical and Electronics Engineering JYOTHI ENGINEERING COLLEGE CHERUTHURUTHY

JYOTHI ENGINEERING COLLEGE CHERUTHURUTHYDEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING

CERTIFICATEThis is to certify that the seminar entitled

CELLULAR GEOLOCATION

was presented by

TOM SHERON

of seventh semester B-Tech Electrical and Electronics Engineering branch on .....21.12.2011.......... in partial fulfillment of the requirement for the award of Bachelor of Technology degree in Electrical and Electronics Engineering under the University of Calicut for the year 2010.

Seminar Coordinator Ms. Reshma Raj C Asst. Professor

Head of the Department Prof. P.V. Abdul Hameed

ACKNOWLEDGEMENT

I take this opportunity to express my heartfelt gratitude and thanks to our seminar coordinator Ms. Reshma Raj C. for her timely suggestion and constant support. I extend my deep gratitude and heartfelt thanks to the principal Dr. Gylson Thomas and Head of the department of electrical and electronics engineering Prof.P.V.Abdhul Hameed their constant encouragement. I express my sincere thanks to all the staff in the electrical and electronics engineering who gave me possible help without which the seminar wouldnt have been a success. Also I would like to thank my parents and all my friends for their interest, dedication and encouragement shown towards my seminar. Above all I thank God Almighty for providing me with the opportunity to present the seminar the way we did.

TOM SHERON

ABSTRACT

Geographical location technology as applied to mobile telephony is currently rapidly advancing.The geographical location data concerning mobile phone users can be effectively utilized to provide local information. In a cellular mobile telecommunication network, the whole service area is divided into a several coverage areas having respective base stations (BS). Each BS coverage area is called a cell. Each BS is provided with a frequency of a range between 450 to900 MHz. More than one cell can use same frequency. Only condition is that no two adjacent cells must have same frequencies. In case of an emergency like a fire, or a patient needing first aid treatment, the mobile subscriber can be accurately located. Tracking the location of a mobile subscriber within the boundary of a cell in a mobile telecommunication network is known as cellular geolocation.An MTSO controls these BSs so that a subscriber can continue his call without interruption while moving between different cells. The MTSO can reduce the time required for calling a subscriber by locating the cell of the subscriber. All the BSs are sending a signal of power 25 to 30w to the mobile unit. When a user switches ON his mobile, it will search for the strongest signal and got connected to that BS. The geolocation of the mobile user could provide services like emergency service for subscriber safety, location sensitive billing,cellular Fraud detection,intelligent transport system services,efficient and effective network performance and management.Technologies used for geolocation are handset based mobile positioning and tracking,direction based geolocation,distance based positioning.

CONTENTS

CHAPTER

TITLE LIST OF ABBREVIATIONS LIST OF FIGURES

PAGE i ii 1 1 1 4 4 5 6 7 7 7 8

1

INTRODUCTION 1.1 1.2 EXISTING TRANSPORTATION SYSTEM INTELLIGENT TRANSPORTATION SYSTEM

2

INTELLIGENT VEHICLES 2.1 2.2 TOTAL SYSTEM INTELLIGENCE NEED OF INTELLIGENT VEHICLE SYSTEM

3

TECHNOLOGY 3.1 REQUIREMENTS 3.1.1 3.1.2 Inter vehicle communication Vehicle to infrastructure communication

4

INTELLIGENT VEHICLES AND AUTOMATED HIGHWAYS

5

FRAME WORK OF INTELLIGENT VEHICLES 5.1 INFORMATION FUSION 5.1.1 5.1.2 5.1.3 5.2 Sensing system Object detection Location estimation

10 11 12 15 15 16 22

BODY CONTROL

6

ADVANTAGES

6.1 7

ADVANTAGES OF THE IV SYSTEM

22 23 23 24 24 24

LIMITATIONS 7.1 LIMITATIONS OF INTELLIGENT VEHICLES

8

APPLICATIONS 8.1 8.2 AUTOMOBILES DRIVER ASSISTANCE AND COLLISION AVOIDANCE 8.3 8.4 8.5 8.6 AUTOMATED OPERATION HEAVY TRUCKS PUBLIC TRANSPORTATION SPECIAL VEHICLES 8.6. 1 8.6. 2 8.6. 3 Snow removal Military operations Industrial automation

24 24 24 25 25 25 25 26 27

9 10

CONCLUSION REFERENCE

LIST OF ABBREVIATIONS

IV- Intelligent vehicle ITS- Intelligent transportation system GPS- Global positioning system

LIST OF FIGURES

FIGURE NO:1.1 3.1 4.1 5.1 5.2

DESCRIPTION

PAGE NO

Graph showing no: of accidents occurring per year Two types of communication used in IV Intelligent transportation system Frame work of intelligent vehicle system Road-following system based on information fusion

2 7 8 10 12

5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12

Sensing system Radar Vision Ultrasonic sensor Positioning system (GPS) Structure of fuzzy PID controller Simplified vehicle control system An Intelligent vehicle Intersections Three intelligent vehicles crossing an unsignalized intersection

12 13 14 14 14 16 17 18 19 19

5.13

Intelligent vehicles overtaking

21

CHAPTER 1

Mobile positioning technology has become an important area of research, for emergency as well as for commercial services. Mobile positioning in cellular networks will provide several services such as, locating stolen mobiles, emergency calls, different billing tariffs depending on where the call is originated, and methods to predict the user movement inside a region. The evolution to location-dependent services and applications in wireless systems continues to require the development of more accurate and reliable mobile positioning technologies. The major challenge to accurate location estimation is in creating techniques that yield acceptable performance when the direct path from the transmitter to the receiver is intermittently blocked. This is the NonLine-Of-Sight (NLOS) problem, and it is known to be a major source of error since it systematically causes mobile to appear farther away from the base station (BS) than it actually is, thereby increasing the positioning error. In this paper, we present a simple method for mobile telephone tracking and positioning with high accuracy.

INTRODUCTION TO MOBILE TECHNOLOGY

Configuration of a typical mobile telecommunication network.

As shown in Figure 1, the mobile telecommunication network includes a several base stations (BSs) T 1 to T N for providing mobile telecommunication service to a mobile subscriber through a mobile telephone M1, a base station controller (BSC) for controlling the BSs T 1 to T N, and a mobile telephone switching office (MTSO) for connecting the BSC to another BTS or a PSTN (Public Switched Telephone Network). In a cellular mobile telecommunication network, the whole service area is divided into a several coverage areas having respective base stations (BS). Each BS coverage area is called a "cell." Each BS is provided with a frequency of a range between 450 to900 MHz. More than one cells can use same frequency. Only condition is that no two adjacent cells must have same frequencies. An MTSO controls these BSs so that a subscriber can continue his call without interruption while moving between different cells.

The MTSO can reduce the time required for calling a subscriber by locating the cell of the subscriber. In case of an emergency like a fire, or a patient needing first aid treatment, the mobile subscriber should be accurately located. Tracking the location of a mobile subscriber within the boundary of a cell in a mobile telecommunication network is known as "location based services Mobile technology includes mainly two functions. They are call fixing and hands-off process. All the BSs are sending a signal of power 25 to 30w to the mobile unit. When a user switches ON his mobile, it will search for the strongest signal and got connected to that BS. Then the mobile unit sends an identification signal to the BS. When he fixes a call, the BS accepts the request and sends the request to the BSC and MTSO. Then the MTSO will searches where the subscriber is and connects the call. When a user moves to another cell the MTSO will change the frequency allotted to it and allots the frequency of the new BS.For both these processes GEOLOCATION of the mobile unit is essential.

NEED FOR GEOLOCATION

One of the most powerful ways to personalize mobile services is based on location. The location based services, provides the subscribers very best of the service. Recent demands from new applications require positioning capabilities of mobile telephones or other devices. The ability to obtain the geo-location of the Mobile Telephone (MT) in the cellular system allows the network operators to facilitate new services to the mobile users. The most immediate motivation for the cellular system to provide MT position is enhanced in accident emergency services. The geolocation of the mobile user could provide services like Emergency service for subscriber safety. Location sensitive billing. Cellular Fraud detection. Intelligent transport system services. Efficient and effective network performance and management.

ARCHITECTURE OF A GEOLOCATION SYSTEM An example of geolocation system architecture [KOS00] is shown in Figure. As we said earlier, in order to fix a call the subscriber we are calling must be located accurately. A geolocation service provider provides location information and location aware services to subscribers. Upon a request from a subscriber for location information about an MS, the service provider will contac