Guide to Wireless Communications. Digital Cellular Telephony. Learning Objectives. Digital Cellular Telephony. Chapter 8

Size: px
Start display at page:

Download "Guide to Wireless Communications. Digital Cellular Telephony. Learning Objectives. Digital Cellular Telephony. Chapter 8"

Transcription

1 Guide to Wireless Communications Digital Cellular Telephony Chapter 2 Learning Objectives Digital Cellular Telephony 3 Describe the applications that can be used on a digital cellular telephone Explain how cellular telephony functions List and describe the features of the generations of cellular telephony List and describe the four types of client software used on a digital cellular telephone Discuss the issues surrounding 3G implementation 4 Although commonplace, digital cellular telephony is most competitive and complex of all wireless telephony Variety of competing technologies such as GSM and CDMA2000 1XEVDO rather than single standard Competing carriers each push a specific technology Governments have even auctioned off part of wireless spectrum to highest bidder

2 Applications Short Message Services (SMS) New and expanded features and applications are pushing wireless digital cellular networks beyond just voice communications Digital cellular telephony can be used for Internet access, , video conferencing, and running a variety of programs Short Message Services (SMS) delivers text-based messages up to 160 characters directly between wireless devices without using the Internet SMS is popular in Europe and Japan with over 200 billion messages sent annually SMS is slow in reaching the US because of profusion of other wireless digital alternatives 5 6 How Cellular Telephony Works Cellular Network Two keys to cellular telephone networks Coverage area is divided into cells, each with a cell transmitter connected to base station that, in turn, is connected to mobile telecommunications switching office (MTSO) See Figure -1 All the transmitters and cell phones operate at low power level to prevent signals from interfering with other cells that may use same frequencies See Figure -2 7

3 Frequency Reuse Cellular Telephone Codes Special codes are associated with cell phones Codes identify phone, phone s owner, and carrier or service provider Table -1 summarizes the codes 9 10 Cellular Telephone Codes Cellular Telephone Handoffs and Roaming When telephone user moves within same cell, base station handles transmissions Handoff is when user moves to another cell and is automatically associated with base station of that cell Roaming is when user moves beyond coverage area of entire cellular network into remote area, as seen in Figure -3 Network in remote area contacts home network to verify that user can make calls and is charged appropriately 11 12

4 13 Handoff and Roaming 14 How a Cellular Phone Receives a Call Cell phone listens for SID transmitted by base station on control channel If SID matches that programmed into phone, cell phone transmits registration request to base station that MTSO uses If SID does not match, cell phone is roaming and MTSO of remote network contacts MTSO of home network to confirm SID is valid How a Cellular Phone Receives a Call Receiving a Call MTSO locates phone and selects frequency which is sent to phone over control channel As user moves to edge of cell, base stations coordinate through MTSO and instruct phone to change frequencies as it is handed off to another cell See Figure

5 Digital Cellular Telephony First Generation Existing since the early 190s in the United States, cellular telephony is divided into several generations First Generation Second Generation 2.5 Generation Third Generation 1G uses analog signals and has 9.6 KHz maximum transmission speed Based on Advanced Mobile Phone Service (AMPS), 1G uses MHz frequency Each channel is 30 KHz wide with 45 KHz passband 32 frequencies are available, with 790 used for voice traffic and 42 for control channel Two frequencies are required for conversation, so there are actually only 395 voice channels and 21 control channels 17 1 First Generation FDMA AMPS uses Frequency Division Multiple Access (FDMA), as illustrated in Figure -5 User is allocated single channel at a time and is switched to another channel if original one deteriorates or has interference 1G networks use circuit-switching technology Because analog signals are prone to interference, 1G is used basically for voice It has been replaced with improved digital technology 19 20

6 Second Generation Second Generation 21 Started in early 1990s, 2G uses digital transmissions to transmits data between 9.5 Kbps and 14.4 Kbps in 00 MHz and 1.9 GHz frequencies Offers several advantages over analog, including More efficient uses of frequency spectrum Quality of voice transmission does not degrade over distance Better security; more difficult to decode Requires less transmitter power Uses smaller and less expensive individual receivers and transmitters 22 2G cellular networks use three different multiple access technologies summarized in Table -2 Time Division Multiple Access (TDMA), shown in Figure -6, allows 3 times as many calls over a single channel as FDMA Code Division Multiple Access (CDMA) allocates entire spectrum all the time, as seen in Figure -7 Global Systems for Mobile Communications (GSM) divides a 25 MHz channel into 124 frequencies, each 200 KHz, and then uses time slots to transmit up to 9.6 Kbps TDMA CDMA 23 24

7 25 2G Technologies Generation 2.5G is regarded as an interim generation Sparsely deployed 2.5G networks operate at 34 Kbps Packet-switched 2.5G networks have two advantages over circuit switched networks More efficient, increasing traffic from 3 to 5 times over that of circuit-switching Always on with connection kept open all the time 2.5 Generation Third Generation 2.5G networks use three technologies General Packet Radio Service (GPRS) uses time slots in a 200 KHz spectrum to transmit at speeds up to 114 Kbps Enhanced Data Rates for Global Evolution (EDGE) uses new modulation technique to transmit up to 34 Kbps CDMA2000 1XRTT supports 144 Kbps packet data transmissions 3G is intended to be a uniform global worldwide standard for cellular wireless communication International Telecommunications Union (ITN) has outlined standard data rates for wireless digital networks 144 Kbps for a mobile user 36 Kbps for slowly moving user 2 Mbps for stationary user 27 2

8 Third Generation Third Generation 29 Transition from CDMA2000 1XRTT is to CDMA200 1XEVDO with data transmission rates of 2.4 Mbps Must be coupled with CDMA2000 1XRTT for both voice and data transmissions CDMA2000 1XEVDV will send both voice and data Transition from EDGE is Wideband CDMA (WCDMA) Adds packet-switching data channel to circuitswitched voice channel to transmit at 2 Mbps in fixed position and at 300 Kbps when mobile 30 Several 3G technologies not yet tested Actual technologies may be different from those currently proposed Figure - shows digital wireless cellular migration paths Table -3 summarizes digital cellular technologies Digital Wireless Cellular Migration Path Digital Cellular Technologies 31 32

9 Client Software Wireless Application Protocol (WAP) 33 Client software that functions on wireless digital cellular devices provide function and user interface to display or manipulate data Some client software is unique to cellular telephones Other software may be used in a variety of different applications 34 WAP provides standard way to transmit, format, and display Internet data on cellular phones Display only textual data because of slow transmission speed and smaller viewing area, as seen in Figure -9 Has a microbrowser that uses Wireless Markup Language (WML) instead of HTML, as seen in Figure -10 A WAP Gateway, also called a WAP Proxy, changes HTML into WML before forwarding it to cell phone, as seen in Figure -11 WAP Display HTML Code 35 36

10 37 WAP 3 HTML and WML Differences HTML controls layout, color, font, and styling, while WML controls only font size and basic font attributes, as seen in Figure -12 WML uses Extensible Markup Language (XML) and tags that specify how content should be formatted WML document, called a deck, contains one or more blocks called cards that contain small parts of a text document and navigation controls One card is displayed on the cell phone at a time as seen in Figure -13 WML Code WML Deck 39 40

11 i-mode Java i-mode, a Japanese-owned Internet access system, is based on compact HTML (chtml) Has its own set of tags and attributes Users are charged for the service by amount of information downloaded plus a service charge Expect i-mode and WAP to merge into one technology in the future Developed by Sun Microsystems, Java is an object-oriented language that runs on almost any hardware platform Java 2 Micro Edition (J2ME) was specifically developed for programming wireless devices Allows cellular phone to access remote applications and Can also run programs on cellular phone itself Binary Runtime Environment for Wireless (BREW) Limitations and the Future BREW, a runtime environment, is a thin software interface, that resides on wireless device Users can download programs and run them on BREW-enabled devices BREW uses memory efficiently, occupying only a small amount of flash memory and dynamically allocating RAM Can be used in combination with other operating systems and any kind of browser WAP and i-mode allow remote access to the Internet They do not support a rich set of graphics J2ME and BREW are expected to become major platforms for variety of wireless devices 43 44

12 Digital Cellular Issues and Outlook Digital Cellular Issues and Outlook Several issues face digital cellular telephony that prevent its rapid acceptance Competing technologies no single road to 3G digital telephony; competing technologies are incompatible Limited spectrum availability No part of spectrum is designated exclusively for 3G; is enough spectrum available to meet needs Several issues face digital cellular telephony that prevent its rapid acceptance High infrastructure costs 3G telephones may cost as much as $300 with $90 monthly charge; carriers will spend billions for infrastructure necessary for 3G Competition from other wireless options Bluetooth, IrDA, and 02.11a WLANs are lessexpensive choices Two keys to cellular telephone networks are dividing coverage area into cells and using low power levels for transmission At the center of each cell is a cell transmitter that sends and receives radio frequency (RF) signals Low-power levels enable signals to stay confined to the cell and not interfere with other cells that use the same frequencies All cell phones have special codes that identify the owner and carrier or service providers Handoff is when user moves to another cell and is automatically associated with base station of new cell 47 4

13 Roaming occurs when a user moves beyond coverage area of entire cellular network and connects to network in remote area Remote area network communicates with home area to verify that user can make calls and is charged appropriately First generation of wireless cellular technology, known as 1G, uses analog signals and transmits at a maximum speed of 9.6 Kbps 1G uses Advanced Mobile Phone Service (AMPS) standard Operates in MHz frequency Uses Frequency Division Multiple Access (FDMA) Is circuit-switching technology Second generation, known as 2G, transmits data between 9.6 Kbps and 14.4 Kbps in 00 MHz and 1.9 GHz frequencies Circuit-switched digital technology Use three different multiple access technologies: Time Division Multiple Access (TDMA) Code Division Multiple Access (CDMA) Global Systems for Mobile (GSM) communications 52 Currently, three variations in 2.5G interim generation of packet-switching network technologies: General Packet Radio Service (GPRS) is for TDMA or GSM 2G networks Enhanced Data Rates for Global Evolution (EDGE) is considered a booster for GPRS systems and can transmit up to 34 Kbps using a new modulation technique CDMA2000 1XRTT supports 144 Kbps packet data transmission and doubles voice capability of current CDMA networks

14 3G digital networks transmit at higher speeds and provide new or expanded applications and features Will require major changes to network infrastructures and a new generation of mobile cellular devices Widely used in Europe and Japan, Short Message Services (SMS) allows delivery of text-based messages directly between wireless devices Client software on cell phone is necessary for Internet surfing or videoconferencing Wireless Application Protocol (WAP) provides a standard way to transmit, format, and display Internet data without requiring rich user interface WAP cell phone runs microbrowser that uses Wireless Markup Language (WML) to display textbased Web content A WAP Gateway must translate between WML and HTML I-mode, another client technology, is based on compact HTML (chtml) It has its own set of tags and attributes Expected I-mode and WAP to merge into one technology in the future Java 2 Micro Edition (J2ME) is a Java subset for programming wireless devices Allows cellular phones to access remote applications and programs as well as run programs Binary Runtime Environment for Wireless (BREW), a thin software interface layer, resides on a wireless device Allows users to download programs and run them on BREW-enabled devices Competing cellular technologies, lack of standards, spectrum limitations, and high costs of implementing 3G technology have prevented rapid acceptance of advanced generations of digital cellular telephony 55 56

15 3G networks have competition from other wireless technologies Top speed for 3G is 2 Mbps standing still, but 02.11a WLANs offer speeds over 100 Mbps while mobile Some carriers install less-expensive stable WLANs in high-traffic hot spots in selected cities as alternative to 3G 57

CHAPTER 1 1 INTRODUCTION

CHAPTER 1 1 INTRODUCTION CHAPTER 1 1 INTRODUCTION 1.1 Wireless Networks Background 1.1.1 Evolution of Wireless Networks Figure 1.1 shows a general view of the evolution of wireless networks. It is well known that the first successful

More information

WIRELESS GLOSSARY OF TERMS. Air Interface: The operating system of a wireless network. Technologies include AMPS, TDMA, CDMA, GSM and iden.

WIRELESS GLOSSARY OF TERMS. Air Interface: The operating system of a wireless network. Technologies include AMPS, TDMA, CDMA, GSM and iden. WIRELESS GLOSSARY OF TERMS Air Interface: The operating system of a wireless network. Technologies include AMPS, TDMA, CDMA, GSM and iden. AMPS: Advanced Mobile Phone Service (AMPS) is the original analog

More information

Wireless Cellular Networks: 3G

Wireless Cellular Networks: 3G Wireless Cellular Networks: 3G Raj Jain Washington University Saint Louis, MO 63131 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse574-06/ 7-1 Overview Wireless

More information

Development of Wireless Networks

Development of Wireless Networks Development of Wireless Networks Cellular Revolution In 1990 mobile phone users populate 11 million. By 2004 the figure will become 1 billion Phones are most obvious sign of the success of wireless technology.

More information

Indian Journal of Advances in Computer & Information Engineering Volume.1 Number.1 January-June 2013, pp.1-5 @ Academic Research Journals.

Indian Journal of Advances in Computer & Information Engineering Volume.1 Number.1 January-June 2013, pp.1-5 @ Academic Research Journals. Cellular System Rajat Chugh, Parag Jasoria, Tushar Arora, Nitin Ginotra and Vivek Anand V Semester, Department of Computer Science and Engineering, Dronacharya College of Engineering, Khentawas, Farukhnagar,

More information

Module 5. Broadcast Communication Networks. Version 2 CSE IIT, Kharagpur

Module 5. Broadcast Communication Networks. Version 2 CSE IIT, Kharagpur Module 5 Broadcast Communication Networks Lesson 9 Cellular Telephone Networks Specific Instructional Objectives At the end of this lesson, the student will be able to: Explain the operation of Cellular

More information

Mobility and cellular networks

Mobility and cellular networks Mobility and cellular s Wireless WANs Cellular radio and PCS s Wireless data s Satellite links and s Mobility, etc.- 2 Cellular s First generation: initially debuted in Japan in 1979, analog transmission

More information

communication over wireless link handling mobile user who changes point of attachment to network

communication over wireless link handling mobile user who changes point of attachment to network Wireless Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers! computer nets: laptops, palmtops, PDAs, Internet-enabled phone promise anytime untethered Internet

More information

Mobile Wireless Overview

Mobile Wireless Overview Mobile Wireless Overview A fast-paced technological transition is occurring today in the world of internetworking. This transition is marked by the convergence of the telecommunications infrastructure

More information

3GPP Wireless Standard

3GPP Wireless Standard 3GPP Wireless Standard Shishir Pandey School of Technology and Computer Science TIFR, Mumbai April 10, 2009 Shishir Pandey (TIFR) 3GPP Wireless Standard April 10, 2009 1 / 23 3GPP Overview 3GPP : 3rd Generation

More information

Wireless Local Area Network

Wireless Local Area Network Wireless Local Area Network ดร. อน นต ผลเพ ม Anan Phonphoem, Ph.D. anan@cpe.ku.ac.th http://www.cpe.ku.ac.th/~anan Computer Engineering Department Kasetsart University, Bangkok, Thailand iwing Lab CPE

More information

8. Cellular Systems. 1. Bell System Technical Journal, Vol. 58, no. 1, Jan 1979. 2. R. Steele, Mobile Communications, Pentech House, 1992.

8. Cellular Systems. 1. Bell System Technical Journal, Vol. 58, no. 1, Jan 1979. 2. R. Steele, Mobile Communications, Pentech House, 1992. 8. Cellular Systems References 1. Bell System Technical Journal, Vol. 58, no. 1, Jan 1979. 2. R. Steele, Mobile Communications, Pentech House, 1992. 3. G. Calhoun, Digital Cellular Radio, Artech House,

More information

Mobile Phone Networks

Mobile Phone Networks Mobile Phone Networks Basic Organizations Infrastructure networks Downlink: tower to phones (forward) Uplink: phones to tower (reverse) Arranged into cells Hence the terminology cell phones Cell Towers

More information

Hello viewers, welcome to today s lecture on cellular telephone systems.

Hello viewers, welcome to today s lecture on cellular telephone systems. Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture minus 31 Cellular Telephone Systems Hello viewers, welcome to today s lecture

More information

Wireless Mobile Telephony

Wireless Mobile Telephony Wireless Mobile Telephony The Ohio State University Columbus, OH 43210 Durresi@cis.ohio-state.edu http://www.cis.ohio-state.edu/~durresi/ 1 Overview Why wireless mobile telephony? First Generation, Analog

More information

CS263: Wireless Communications and Sensor Networks

CS263: Wireless Communications and Sensor Networks CS263: Wireless Communications and Sensor Networks Matt Welsh Lecture 4: Medium Access Control October 5, 2004 2004 Matt Welsh Harvard University 1 Today's Lecture Medium Access Control Schemes: FDMA TDMA

More information

Evolution of Mobile Communications: from 1G to 4G

Evolution of Mobile Communications: from 1G to 4G Evolution of Mobile Communications: from 1G to 4G Vasco Pereira and Tiago Sousa Department of Informatics Engineering of the University of Coimbra {vasco,tmas}@dei.uc.pt Abstract Today, mobile communications

More information

Chapter 3 Cellular Networks. Wireless Network and Mobile Computing Professor: Dr. Patrick D. Cerna

Chapter 3 Cellular Networks. Wireless Network and Mobile Computing Professor: Dr. Patrick D. Cerna Chapter 3 Cellular Networks Wireless Network and Mobile Computing Professor: Dr. Patrick D. Cerna Objectives! Understand Cellular Phone Technology! Know the evolution of evolution network! Distinguish

More information

1G to 4G. Overview. Presentation By Rajeev Bansal Director(Mobile-1) Telecommunication Engineering Centre

1G to 4G. Overview. Presentation By Rajeev Bansal Director(Mobile-1) Telecommunication Engineering Centre 1G to 4G Overview Presentation By Rajeev Bansal Director(Mobile-1) Telecommunication Engineering Centre Mobile Networks differentiated from each other by the word Generation 1G, 2G, 2.5G, 2.75G, 3G milestones

More information

The GSM and GPRS network T-110.300/301

The GSM and GPRS network T-110.300/301 The GSM and GPRS network T-110.300/301 History The successful analog 1:st generation mobile telephone systems proved that there is a market for mobile telephones ARP (AutoRadioPuhelin) in Finland NMT (Nordic

More information

Cellular Network Organization. Cellular Wireless Networks. Approaches to Cope with Increasing Capacity. Frequency Reuse

Cellular Network Organization. Cellular Wireless Networks. Approaches to Cope with Increasing Capacity. Frequency Reuse Cellular Network Organization Cellular Wireless Networks Use multiple low-power transmitters (100 W or less) Areas divided into cells Each served by its own antenna Served by base station consisting of

More information

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction Wireless Physical Layer Q1. Is it possible to transmit a digital signal, e.g., coded as square wave as used inside a computer, using radio transmission without any loss? Why? It is not possible to transmit

More information

Worldwide Major Mobile Phone Vendor Performance, 2Q 2015

Worldwide Major Mobile Phone Vendor Performance, 2Q 2015 Communications Worldwide Major Mobile Phone Vendor Performance, 2Q 2015 Worldwide Mobile Phone Shipment Volume, 1Q 2013-3Q 2015 Major Mobile Phone Vendor Shipment Volume, 1Q 2013-3Q 2015 Major Mobile Phone

More information

GSM v. CDMA: Technical Comparison of M2M Technologies

GSM v. CDMA: Technical Comparison of M2M Technologies GSM v. CDMA: Technical Comparison of M2M Technologies Introduction Aeris provides network and data analytics services for Machine-to- Machine ( M2M ) and Internet of Things ( IoT ) applications using multiple

More information

HP ipaq and GSM/GPRS/EDGE Technology

HP ipaq and GSM/GPRS/EDGE Technology HP ipaq and GSM/GPRS/EDGE Technology Abstract... 2 Introduction to GSM/GPRS/EDGE... 2 GSM... 2 SIM Cards... 2 GPRS... 3 EDGE... 3 Notes... 3 HP ipaq GSM/GPRS/EDGE Phone and Data Connection... 3 HP ipaq

More information

Mobile Communications TCS 455

Mobile Communications TCS 455 Mobile Communications TCS 455 Dr. Prapun Suksompong prapun@siit.tu.ac.th Lecture 26 1 Office Hours: BKD 3601-7 Tuesday 14:00-16:00 Thursday 9:30-11:30 Announcements Read the following from the SIIT online

More information

Foreword... 2 Introduction to VoIP... 3 SIP:... 3 H.323:... 4 SER:... 4 Cellular network... 4 GSM... 5 GPRS... 6 3G... 6 Wimax... 7 Introduction...

Foreword... 2 Introduction to VoIP... 3 SIP:... 3 H.323:... 4 SER:... 4 Cellular network... 4 GSM... 5 GPRS... 6 3G... 6 Wimax... 7 Introduction... Foreword... 2 Introduction to VoIP... 3 SIP:... 3 H.323:... 4 SER:... 4 Cellular network... 4 GSM... 5 GPRS... 6 3G... 6 Wimax... 7 Introduction... 7 Fixed-WiMAX based on the IEEE 802.16-2004... 8 Mobile

More information

Cellular Network. Outline. Chapter 8. Conventional Radio

Cellular Network. Outline. Chapter 8. Conventional Radio Chapter 8 Cellular Network Outline The Development of Cellular Networks Cellular technologies and terminologies Second generation digital networks Third generation packet networks Other services 1 2 Conventional

More information

EDGE: Enhanced Data Rates for GSM Evolution

EDGE: Enhanced Data Rates for GSM Evolution EDGE: Enhanced Data Rates for GSM Evolution SIDDARTH WANDRE ID: 999-29-3194 CS 548: Broadband Networks ILLINOIS INSTITUTE OF TECHNOLOGY Abstract:- This paper gives an overview of the EDGE concept. It gives

More information

Imre Földes THE EVOLUTION OF MODERN CELLULAR NETWORKS

Imre Földes THE EVOLUTION OF MODERN CELLULAR NETWORKS Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Imre Földes THE EVOLUTION OF MODERN CELLULAR NETWORKS Research Report BUDAPEST, 2015 Contents 1 The early

More information

The Future of Mobile Wireless Internet Access. Nelson Sollenberger AT&T nelson@research.att.com

The Future of Mobile Wireless Internet Access. Nelson Sollenberger AT&T nelson@research.att.com The Future of Mobile Wireless Internet Access Nelson Sollenberger AT&T nelson@research.att.com Web Phones: The Next Big Thing? Neopoint 1000 About $300, 6 ounces, versatile and slim, connects to a PC and

More information

Introduction to Wireless Communications and Networks

Introduction to Wireless Communications and Networks Introduction to Wireless Communications and Networks Tongtong Li Dept. Electrical and Computer Engineering East Lansing, MI 48824 tongli@egr.msu.edu 1 Outline Overview of a Communication System Digital

More information

Wireless LANs vs. Wireless WANs

Wireless LANs vs. Wireless WANs White Paper Wireless LANs vs. Wireless WANs White Paper 2130273 Revision 1.0 Date 2002 November 18 Subject Supported Products Comparing Wireless LANs and Wireless WANs Wireless data cards and modules,

More information

Emerging Wireless Technologies

Emerging Wireless Technologies Emerging Wireless Technologies A look into the future of wireless communications beyond 3G Forward: The Public Safety Wireless Network (PSWN) Program is conducting an ongoing assessment of advancements

More information

Chapter 1: Introduction

Chapter 1: Introduction Chapter 1: Introduction Jyh-Cheng Chen and Tao Zhang IP-Based Next-Generation Wireless Networks Published by John Wiley & Sons, Inc. January 2004 This material is protected under all Copyright Laws as

More information

Global System for Mobile Communication Technology

Global System for Mobile Communication Technology Global System for Mobile Communication Technology Mobile Device Investigations Program Technical Operations Division DHS - FLETC GSM Technology Global System for Mobile Communication or Groupe Special

More information

Time Division Multiple Access (TDMA)

Time Division Multiple Access (TDMA) Time Division Multiple Access (TDMA) Definition Time division multiple access (TDMA) is digital transmission technology that allows a number of users to access a single radio-frequency (RF) channel without

More information

Wireless Cellular Networks: 1G and 2G

Wireless Cellular Networks: 1G and 2G Wireless Cellular Networks: 1G and 2G Raj Jain Professor of Computer Science and Engineering Washington University in Saint Louis Saint Louis, MO 63130 Audio/Video recordings of this lecture are available

More information

Computer Networks. Wireless and Mobile Networks. László Böszörményi Computer Networks Mobile - 1

Computer Networks. Wireless and Mobile Networks. László Böszörményi Computer Networks Mobile - 1 Computer Networks Wireless and Mobile Networks László Böszörményi Computer Networks Mobile - 1 Background Number of wireless (mobile) phone subscribers now exceeds number of wired phone subscribers! Computer

More information

(C) Global Journal of Engineering Science and Research Management

(C) Global Journal of Engineering Science and Research Management ADVANTAGEOUS INTERNET ACCESS CHART BY UTILIZING "IMODE" TECHNOLOGY Aruna Rai Vadde *1 Ginbar Ensermu 2 1,2 Department of Electrical and Computer Engineering, College of Engineering and Technology, Wollega

More information

Pradipta Biswas Roll No. 04IT6007 M. Tech. (IT) School of Information Technology Indian Institute of Technology, Kharagpur

Pradipta Biswas Roll No. 04IT6007 M. Tech. (IT) School of Information Technology Indian Institute of Technology, Kharagpur Pradipta Biswas Roll No. 04IT6007 M. Tech. (IT) School of Information Technology Indian Institute of Technology, Kharagpur ABSTRACT W-CDMA (Wideband Code-Division Multiple Access), an ITU standard derived

More information

Lecture 1. Introduction to Wireless Communications 1

Lecture 1. Introduction to Wireless Communications 1 896960 Introduction to Algorithmic Wireless Communications Lecture 1. Introduction to Wireless Communications 1 David Amzallag 2 May 25, 2008 Introduction to cellular telephone systems. How a cellular

More information

Over the PSTN... 2 Over Wireless Networks... 2. Network Architecture... 3

Over the PSTN... 2 Over Wireless Networks... 2. Network Architecture... 3 Content Introduction... 1 History of Modems... 2 Over the PSTN... 2 Over Wireless Networks... 2 Network Architecture... 3 Circuit-Switched Cellular Data... 3 Short Message Service... 3 Packet-Switched

More information

Telephone Systems. Home Telephones. Central Office. Local Loop. Wired Telephony

Telephone Systems. Home Telephones. Central Office. Local Loop. Wired Telephony Telephone Systems COMP476 Home Telephones Plain Old Telephone Service (POTS) provides a twisted pair connection from your phone to the central office. You own your home wiring and the telephone company

More information

Efficient Preemption Method on CDMA Systems

Efficient Preemption Method on CDMA Systems Efficient Preemption Method on CDMA Systems Naoki KANADA, Kakuichi SHIOMI kanada@enri.go.jp, shiomi@enri.go.jp Traffic Management Systems Division, Electronic Navigation Research Institute Efficient Preemption

More information

Optimizing Wireless Networks.

Optimizing Wireless Networks. from the makers of inssider Optimizing Wireless Networks. Over the past few years, MetaGeek has created tools to help users optimize their wireless networks. MetaGeek s tools help visualize the physical

More information

Backgrounds regarding data transmission in GSM and UMTS mobile networks for Sunny WebBox / Sunny Boy Control

Backgrounds regarding data transmission in GSM and UMTS mobile networks for Sunny WebBox / Sunny Boy Control GSM Backgrounds regarding data transmission in GSM and UMTS mobile networks for Sunny WebBox / Sunny Boy Control Contents In addition to telephony, services for digital fax and data transmission were already

More information

Physical Layer. Communication Satellites. ECE 453 Introduction to Computer Networks. Lecture 3 Physical Layer II

Physical Layer. Communication Satellites. ECE 453 Introduction to Computer Networks. Lecture 3 Physical Layer II ECE 453 Introduction to Computer Networks Lecture 3 Physical Layer II 1 Physical Layer Services transmit bits from sender to receiver. Transmission media Guided: twisted pair, coax, fiber Unguided (wireless):

More information

Computers Are Your Future. 2006 Prentice-Hall, Inc.

Computers Are Your Future. 2006 Prentice-Hall, Inc. Computers Are Your Future 2006 Prentice-Hall, Inc. Computers Are Your Future Chapter 3 Wired and Wireless Communication 2006 Prentice-Hall, Inc Slide 2 What You Will Learn... ü The definition of bandwidth

More information

Mobile Network Evolution Part 1. GSM and UMTS

Mobile Network Evolution Part 1. GSM and UMTS Mobile Network Evolution Part 1 GSM and UMTS GSM Cell layout Architecture Call setup Mobility management Security GPRS Architecture Protocols QoS EDGE UMTS Architecture Integrated Communication Systems

More information

Wireless Information Transmission System Lab. Introduction to Wireless Communications

Wireless Information Transmission System Lab. Introduction to Wireless Communications Wireless Information Transmission System Lab. Introduction to Wireless Communications Wireless Communication Systems Network Radio wave wire wire LAN Network Base station transceiver LAN 2 Wireless Technologies

More information

Cellular Communications

Cellular Communications Definition Cellular Communications A cellular mobile communications system uses a large number of low-power wireless transmitters to create cells the basic geographic service area of a wireless communications

More information

The Evolution of Cellular Data: On the Road to 3G. Published by Intel Corporation. Peter Rysavy, Rysavy Research. Copyright 1999. All rights reserved.

The Evolution of Cellular Data: On the Road to 3G. Published by Intel Corporation. Peter Rysavy, Rysavy Research. Copyright 1999. All rights reserved. The Evolution of Cellular Data: On the Road to 3G Published by Intel Corporation. Peter Rysavy, Rysavy Research Copyright 1999. All rights reserved. Introduction Wireless phone use is taking off around

More information

Dell NetReady Mobile Broadband Service User's Guide

Dell NetReady Mobile Broadband Service User's Guide Dell NetReady Mobile Broadband Service User's Guide Introduction Quick Start Service Coverage Frequently Asked Questions Glossary Information in this document is subject to change without notice. Introduction:

More information

GSM Network and Services

GSM Network and Services GSM Network and Services Cellular networks GSM Network and Services 2G1723 Johan Montelius 1 The name of the game The number one priority for mobile/cellular networks is to implement full-duplex voice

More information

Episode 5: Cellular Networks (GSM and UMTS)

Episode 5: Cellular Networks (GSM and UMTS) Episode 5: Cellular Networks (GSM and UMTS) Hannes Frey and Peter Sturm University of Trier Motivation Mobile telephone networks are nearly ubiquitous Still basic client/server architecture Only last mile

More information

Chapter 1 Introduction to Wireless Communication Systems. School of Information Science and Engineering, SDU

Chapter 1 Introduction to Wireless Communication Systems. School of Information Science and Engineering, SDU Chapter 1 Introduction to Wireless Communication Systems School of Information Science and Engineering, SDU Outline Wireless History The Wireless Vision Technical Challenges Wireless definitions Classification

More information

W-CDMA/UMTS Wireless Networks

W-CDMA/UMTS Wireless Networks W-CDMA/UMTS Wireless Networks Understanding the Air Interface This technical brief introduces the reader to W-CDMA/UMTS wireless networks and provide some understanding and insight to the air interface

More information

1.264 Lecture 21. Telecom network technology: Fiber, satellite, cellular telephony, cable modems, DSL

1.264 Lecture 21. Telecom network technology: Fiber, satellite, cellular telephony, cable modems, DSL 1.264 Lecture 21 Telecom network technology: Fiber, satellite, cellular telephony, cable modems, DSL Network technology We ve just covered the basic components of transmission, switching/ routing and physical

More information

COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION

COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION Answers to End-of-Chapter Questions Matching g 1. whiteboard i 2. sending device o 3. streaming j 4. WiFi m 5. Webcam d 6. data transfer

More information

CDMA Technology : Pr. S. Flament www.greyc.fr/user/99. Pr. Dr. W. Skupin www.htwg-konstanz.de. On line Course on CDMA Technology

CDMA Technology : Pr. S. Flament www.greyc.fr/user/99. Pr. Dr. W. Skupin www.htwg-konstanz.de. On line Course on CDMA Technology CDMA Technology : Pr. Dr. W. Skupin www.htwg-konstanz.de Pr. S. Flament www.greyc.fr/user/99 On line Course on CDMA Technology CDMA Technology : Introduction to Spread Spectrum Technology CDMA / DS : Principle

More information

The Growth and Evolution of CDMA2000 1xEV-DO

The Growth and Evolution of CDMA2000 1xEV-DO The Growth and Evolution of CDMA2000 1xEV-DO March 2005 CDMA2000 1xEV-DO The fastest mobile wireless networks in the world, from Seoul to San Diego and Sao Paolo, are powered by CDMA2000 1xEV- DO (Evolution

More information

Emerging Wireless Technologies

Emerging Wireless Technologies Emerging Wireless Technologies QCHAT The Future of Push-to-Talk Communications Foreword: The Public Safety Wireless Network (PSWN) Program is conducting an ongoing assessment of advancements in the wireless

More information

EPL 657 Wireless Networks

EPL 657 Wireless Networks EPL 657 Wireless Networks Some fundamentals: Multiplexing / Multiple Access / Duplex Infrastructure vs Infrastructureless Panayiotis Kolios Recall: The big picture... Modulations: some basics 2 Multiplexing

More information

Chapters 1-21 Introduction to Wireless Communication Systems

Chapters 1-21 Introduction to Wireless Communication Systems Chapters 1-21 Introduction to Wireless Communication Systems Yimin Zhang, Ph.D. Department of Electrical & Computer Engineering Villanova University http://yiminzhang.com/ece8708 Yimin Zhang, Villanova

More information

Wireless Access of GSM

Wireless Access of GSM Wireless Access of GSM Project Report FALL, 1999 Wireless Access of GSM Abstract: Global System for Mobile communications (GSM) started to be developed by Europeans when the removal of many European trade

More information

Cellular Data Communications Made Easy

Cellular Data Communications Made Easy Cellular Data Communications Made Easy by Peter Rysavy Published July 1, 1997, Network Computing Copyright Peter Rysavy and Network Computing All rights reserved Huge numbers of people are hitting the

More information

Multiple Access Techniques

Multiple Access Techniques Multiple Access Techniques Dr. Francis LAU Dr. Francis CM Lau, Associate Professor, EIE, PolyU Content Introduction Frequency Division Multiple Access Time Division Multiple Access Code Division Multiple

More information

DT3: RF On/Off Remote Control Technology. Rodney Singleton Joe Larsen Luis Garcia Rafael Ocampo Mike Moulton Eric Hatch

DT3: RF On/Off Remote Control Technology. Rodney Singleton Joe Larsen Luis Garcia Rafael Ocampo Mike Moulton Eric Hatch DT3: RF On/Off Remote Control Technology Rodney Singleton Joe Larsen Luis Garcia Rafael Ocampo Mike Moulton Eric Hatch Agenda Radio Frequency Overview Frequency Selection Signals Methods Modulation Methods

More information

Location management Need Frequency Location updating

Location management Need Frequency Location updating Lecture-16 Mobility Management Location management Need Frequency Location updating Fig 3.10 Location management in cellular network Mobility Management Paging messages Different paging schemes Transmission

More information

Wireless Technologies for the 450 MHz band

Wireless Technologies for the 450 MHz band Wireless Technologies for the 450 MHz band By CDG 450 Connectivity Special Interest Group (450 SIG) September 2013 1. Introduction Fast uptake of Machine- to Machine (M2M) applications and an installed

More information

Discovering Computers 2008. Chapter 9 Communications and Networks

Discovering Computers 2008. Chapter 9 Communications and Networks Discovering Computers 2008 Chapter 9 Communications and Networks Chapter 9 Objectives Discuss the the components required for for successful communications Identify various sending and receiving devices

More information

Evolution of the Air Interface From 2G Through 4G and Beyond

Evolution of the Air Interface From 2G Through 4G and Beyond Evolution of the Air Interface From 2G Through 4G and Beyond Presentation to IEEE Ottawa Section / Alliance of IEEE Consultants Network (AICN) - 2nd May 2012 Frank Rayal BLiNQ Networks/ Telesystem Innovations

More information

White Paper ON Dual Mode Phone (GSM & Wi-Fi)

White Paper ON Dual Mode Phone (GSM & Wi-Fi) White Paper ON Dual Mode Phone (GSM & Wi-Fi) Author: N Group 1.0 Abstract Dual Mode Handset is in demand for converged Network, Access, Billing, and Operation environment. Dual mode handsets provide cost

More information

Mobile Networking Concepts and Protocols CNT 5517

Mobile Networking Concepts and Protocols CNT 5517 Mobile Networking Concepts and Protocols CNT 5517 Some slides are adapted from Dr. Dave Johnson Notes Dr. Sumi Helal, Ph.D. Professor Computer & Information Science & Engineering Department University

More information

HSPA, LTE and beyond. HSPA going strong. PRESS INFORMATION February 11, 2011

HSPA, LTE and beyond. HSPA going strong. PRESS INFORMATION February 11, 2011 HSPA, LTE and beyond The online multimedia world made possible by mobile broadband has changed people s perceptions of data speeds and network service quality. Regardless of where they are, consumers no

More information

The cost and performance benefits of 80 GHz links compared to short-haul 18-38 GHz licensed frequency band products

The cost and performance benefits of 80 GHz links compared to short-haul 18-38 GHz licensed frequency band products The cost and performance benefits of 80 GHz links compared to short-haul 18-38 GHz licensed frequency band products Page 1 of 9 Introduction As service providers and private network operators seek cost

More information

Chapter 6 Telecommunications, Networks, and Wireless. Computing

Chapter 6 Telecommunications, Networks, and Wireless. Computing Chapter 6 Telecommunications, Networks, and Wireless Computing Essay Questions: 1. Define a hub, switch, and a router. 2. List the challenges associated with managing contemporary telecommunications and

More information

Global System for Mobile Communication (GSM)

Global System for Mobile Communication (GSM) Global System for Mobile Communication (GSM) Definition Global system for mobile communication (GSM) is a globally accepted standard for digital cellular communication. GSM is the name of a standardization

More information

Cellular Wireless Networks. Principles of Cellular Networks

Cellular Wireless Networks. Principles of Cellular Networks Cellular Wireless Networks Chapter 14 CS420/520 Axel Krings Page 1 Principles of Cellular Networks Underlying technology for mobile phones, personal communication systems, wireless networking etc. Developed

More information

Basic Goals of Networking

Basic Goals of Networking Cellular Network Basic Goals of Networking Call management Call setup Call termination Different Service: voice over IP, call forwarding, 2 Basic Goals of Networking User Information Transport Modulation

More information

NTRC Dominica April 28 to May 2, 2014 Fort Young Hotel

NTRC Dominica April 28 to May 2, 2014 Fort Young Hotel NTRC Dominica April 28 to May 2, 2014 Fort Young Hotel Mobile Networks Next Generation Mobile Networks Keith A. Benjamin Operations Manager South Cluster LIME (Cable & Wireless) Global Markets Global Markets

More information

U.S. Patent Appl. No. 13/247.308 filed September 28, 2011 NETWORK ADDRESS PRESERVATION IN MOBILE NETWORKS TECHNICAL FIELD

U.S. Patent Appl. No. 13/247.308 filed September 28, 2011 NETWORK ADDRESS PRESERVATION IN MOBILE NETWORKS TECHNICAL FIELD U.S. Patent Appl. No. 13/247.308 filed September 28, 2011 NETWORK ADDRESS PRESERVATION IN MOBILE NETWORKS TECHNICAL FIELD [0001] The disclosure relates to mobile networks and, more specifically, to wireless

More information

Dimensioning, configuration and deployment of Radio Access Networks. Lecture 2.1: Voice in GSM

Dimensioning, configuration and deployment of Radio Access Networks. Lecture 2.1: Voice in GSM Dimensioning, configuration and deployment of Radio Access Networks. Lecture.: Voice in GSM GSM Specified by ETSI Frequency Division Duplex TDMA system Originally at 900MHz, but today also at 800, 800,

More information

Mobile Computing. Basic Call Calling terminal Network Called terminal 10/25/14. Public Switched Telephone Network - PSTN. CSE 40814/60814 Fall 2014

Mobile Computing. Basic Call Calling terminal Network Called terminal 10/25/14. Public Switched Telephone Network - PSTN. CSE 40814/60814 Fall 2014 Mobile Computing CSE 40814/60814 Fall 2014 Public Switched Telephone Network - PSTN Transit switch Transit switch Long distance network Transit switch Local switch Outgoing call Incoming call Local switch

More information

The range of RF spans 3 KHz (3000 Hz) to 300 GHz (300 million Hz)

The range of RF spans 3 KHz (3000 Hz) to 300 GHz (300 million Hz) 1 2 The range of RF spans 3 KHz (3000 Hz) to 300 GHz (300 million Hz) Frequencies of RF devices range from the low frequency AM broadcasts (80 MHz) to higher frequency mobile phones (1900 MHz) smart meters

More information

Mobile Communications

Mobile Communications Mobile Communications Vincent Roca (2001-10) Claude Castelluccia (1998-2001) INRIA vincent.roca@inria.fr claude.castelluccia@inria.fr http://planete.inrialpes.fr/~roca/ Overview of the Course! Part 1:

More information

Verizon Wireless White Paper. Verizon Wireless Broadband Network Connectivity and Data Transport Solutions

Verizon Wireless White Paper. Verizon Wireless Broadband Network Connectivity and Data Transport Solutions Verizon Wireless White Paper Verizon Wireless Broadband Network Connectivity and Data Transport Solutions Verizon Wireless White Paper Verizon Wireless Broadband Network Connectivity and Data Transport

More information

Multiplexing on Wireline Telephone Systems

Multiplexing on Wireline Telephone Systems Multiplexing on Wireline Telephone Systems Isha Batra, Divya Raheja Information Technology, Dronacharya College of Engineering Farrukh Nagar, Gurgaon, India ABSTRACT- This Paper Outlines a research multiplexing

More information

GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving

GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving 1 Space Division Multiple Access of the signals from the MSs A BTS with n directed antennae covers mobile stations

More information

GO Software Inc. Wireless Credit Card Processing with PCCharge

GO Software Inc. Wireless Credit Card Processing with PCCharge GO Software Inc. Wireless Credit Card Processing with PCCharge PCCharge will wirelessly connect to credit card processors and automatically process credit cards wirelessly if properly set up to run with

More information

Introductory Concepts

Introductory Concepts Chapter 1 Introductory Concepts 1.1 Introduction Communication is one of the integral parts of science that has always been a focus point for exchanging information among parties at locations physically

More information

White Paper. D-Link International Tel: (65) 6774 6233, Fax: (65) 6774 6322. E-mail: info@dlink.com.sg; Web: http://www.dlink-intl.

White Paper. D-Link International Tel: (65) 6774 6233, Fax: (65) 6774 6322. E-mail: info@dlink.com.sg; Web: http://www.dlink-intl. Introduction to Voice over Wireless LAN (VoWLAN) White Paper D-Link International Tel: (65) 6774 6233, Fax: (65) 6774 6322. Introduction Voice over Wireless LAN (VoWLAN) is a technology involving the use

More information

Multiple Access Techniques

Multiple Access Techniques Chapter 8 Multiple Access Techniques Multiple access techniques are used to allow a large number of mobile users to share the allocated spectrum in the most efficient manner. As the spectrum is limited,

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;

More information

Appendix A: Basic network architecture

Appendix A: Basic network architecture Appendix A: Basic network architecture TELECOMMUNICATIONS LOCAL ACCESS NETWORKS Traditionally, telecommunications networks are classified as either fixed or mobile, based on the degree of mobility afforded

More information

Wireless Broadband Access

Wireless Broadband Access Wireless Broadband Access (Brought to you by RMRoberts.com) Mobile wireless broadband is a term used to describe wireless connections based on mobile phone technology. Broadband is an electronics term

More information

EECC694 - Shaaban. Transmission Channel

EECC694 - Shaaban. Transmission Channel The Physical Layer: Data Transmission Basics Encode data as energy at the data (information) source and transmit the encoded energy using transmitter hardware: Possible Energy Forms: Electrical, light,

More information

Use Current Success to Develop Future Business

Use Current Success to Develop Future Business >THIS IS THE WAY Use Current Success to Develop Future Business Malur Narayan / Nitin Khanna February 2005 >THIS IS Wireless Broadband Opportunities & Segments Mobile Broadband Access Enterprise Broadband

More information

Talking the Talk - A Guide to Mobile Advertising Terminology

Talking the Talk - A Guide to Mobile Advertising Terminology MERCURY MEDIA INDEX June 2010 Michael Goodman, Senior Director, Research and Analytics, mgoodman@mercurymedia.com, 508-449-3319 Talking the Talk - A Guide to Mobile Advertising Terminology As consumer

More information