Multiple Access Protocols

Slides:

Advertisements

Similar presentations

Multiple Access Techniques for wireless communication

Advertisements

12.1 Chapter 12 Multiple Access Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Multiple Access Methods. When nodes or stations are connected and use a common link (cable or air), called a multipoint or broadcast link, we need a.

12.1 Chapter 12 Multiple Access Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 12 Multiple Access Figure 12.1 Data link layer divided into two functionality-oriented sublayers Figure 12.2 Taxonomy of multiple-access protocols.

ENGR How do multiple users “share” the airwaves? Multiple Access (MA) techniques: –Time Division MA (TDMA) –Frequency Division MA (FDMA) –Code Division.

6.1 Chapter 6 Bandwidth Utilization: Multiplexing and Spreading Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

6.1 Chapter 6 Bandwidth Utilization: Multiplexing and Spreading Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Lecture Focus: Data Communications and Networking  Data Link Layer  Media Access Control (MAC) Lecture 24 CSCS 311.

Wireless Wide Area Networks

SAMEER NETAM RAHUL GUPTA PAWAN KUMAR SINGH ONKAR BAGHEL OM PANKAJ EKKA Submitted By:

Technique for assuring that a transmitting entity does not overwhelm a receiving entity with data Necessary when data is being sent faster than it.

Wireless Communications. Outline Introduction History System Overview Signals and Propagation Noise and Fading Modulation Multiple Access Design of Cellular.

Cell Phone Technology. Cell Phone Frequencies Cell phones use full-duplex radios, rather than half-duplex radios like those used in walkie-talkies, so.

: Data Communication and Computer Networks

Chi-Cheng Lin, Winona State University CS 313 Introduction to Computer Networking & Telecommunication CDMA.

Chapter 13: Wireless Networks Business Data Communications, 4e.

1 Kyung Hee University Chapter 17 Cellular Telephone and Satellite Networks.

Chapter 12 Multiple Access Figure 12.1 Data link layer divided into two functionality-oriented sublayers Figure 12.2 Taxonomy of multiple-access protocols.

COMMUNICATION SYSTEM EEEB453 Chapter 7(Part I) MULTIPLEXING.

1 Kyung Hee University Chapter 16 Wireless WANs: Cellular Telephone.

Teachers Name : Suman Sarker Telecommunication Technology Subject Name : Mobile & Wireless Communication-2 Subject Code : 9471 Semester :7th Department.

A. B. M. Nasiruzzaman Dept. of EEE, RUET Figure 6.6 Example 6.1.

Multiple Access Protocol ผศ. ดร. อนันต์ ผลเพิ่ม Asst.Prof.Anan Phonphoem, Ph.D. Computer Engineering Department.

Digital Cellular Techniques ENGR 475 – Telecommunications October 26, 2006 Harding University Jonathan White.

CDMA Code Division Multiple Access. is a channel access method

McGraw-Hill©The McGraw-Hill Companies, Inc., 2000 Lecture # 17 Computer Communication & Networks.

12.1 Chapter 12 Multiple Access Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Data Communications, Kwangwoon University12-1 Chapter 12. Multiple Access 1.Random Access 2.Controlled Access 3.Channelization.

1 Kyung Hee University Chapter 12 Multiple Access.

The Physical Layer Chapter 2 – Part 2 Ch The Local Loop: Modems, ADSL, and Wireless The use of both analog and digital transmissions for a computer.

WCDMA Introduction Code Division Multiple Access

CDMA TECHNOLOGY DEFINITION OF CDMA TECHNOLOGY A coding scheme, used as a modulation technique, in which multiple channels are independently coded for.

Chapter 6 Bandwidth Utilization Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

1 Kyung Hee University Chapter 12 Multiple Access.

Wireless WANs: Cellular Telephone and Satellite Networks

COMMUNICATION SYSTEM EECB353 Chapter 7 Part III MULTIPLE ACCESS Intan Shafinaz Mustafa Dept of Electrical Engineering Universiti Tenaga Nasional

Chapter 12 Media Access Control (MAC) Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

12.1 Chapter 12 Multiple Access Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 12 Multiple Access

Wireless Communications Outline Introduction History System Overview Signals and Propagation Noise and Fading Modulation Multiple Access Design of Cellular.

1 Kyung Hee University Prof. Choong Seon HONG Multiple Access.

McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Chapter 13 Multiple Access.

1 Kyung Hee University Chapter 17 Cellular Telephone and Satellite Networks.

Wireless Application Protocol Multiple Access Protocols.

Chapter 13 Multiple Access.

6.1 Chapter 6 Bandwidth Utilization: Multiplexing and Spreading Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 12 Media Access Control (MAC)

UNIT 3 MULTIPLE ACCESS Adapted from lecture slides by Behrouz A. Forouzan © The McGraw-Hill Companies, Inc. All rights reserved.

Multiple Access. Figure 12.1 Data link layer divided into two functionality-oriented sublayers.

Network Operations & administration CS 4592 Lecture 18 Instructor: Ibrahim Tariq.

FDMA TDMA CDMA 1 x 1 = 1 1 x = x 1 = x = 1 Low-Bandwidth Signal: High-Bandwidth Spreading Code:...repeated...

Part III. Data Link Layer

Multiple Access Techniques for Wireless Communication

Outline Introduction Type of Multiplexing FDMA TDMA CDMA Future Work

Bandwidth Utilization

Chapter 12 Part 2 Media Access Control (MAC)

Data link layer divided into two functionality-oriented sublayers

Chapter 12 Multiple Access

Bandwidth Utilization

Multiple Access Problem: When two or more nodes transmit at the same time, their frames will collide and the link bandwidth is wasted during collision.

Multiple Access Mahesh Jangid Assistant Professor JVW University.

Figure 12.1 Data link layer divided into two functionality-oriented sublayers Networks can be divided into two categories: those using point-to-point.

Chapter 13 Multiple Access.

Chapter 13 Multiple Access

Chapter 13 Multiple Access

Cellular Telephone Networks

Chapter 12 Media Access Control (MAC)

Physical Layer (2).

Presentation transcript:

Multiple Access Protocols Chapter 7

Channelization

Topics discussed in this section: CHANNELIZATION Channelization is a multiple-access method in which the available bandwidth of a link is shared in time, frequency, or through code, between different stations. In this section, we discuss three channelization protocols. Topics discussed in this section: Frequency-Division Multiple Access (FDMA) Time-Division Multiple Access (TDMA) Code-Division Multiple Access (CDMA)

Frequency-division multiple access (FDMA)

Note In FDMA, the available bandwidth of the common channel is divided into bands that are separated by guard bands.

Time-division multiple access (TDMA)

Note In TDMA, the bandwidth is just one channel that is timeshared between different stations.

In CDMA, one channel carries all transmissions simultaneously. Note In CDMA, one channel carries all transmissions simultaneously.

Simple idea of communication with code

Chip sequences

Data representation in CDMA

Sharing channel in CDMA

Digital signal created by four stations in CDMA

Decoding of the composite signal for one in CDMA

AMPS is used in North America Note AMPS (Advanced Mobile Phone Service) is an analog cellular phone system using FDMA. AMPS is used in North America

Second-generation cellular phone systems Interim Standard 95 (IS-95) is the first CDMA-based digital cellular standard by Qualcomm (CDMAOne). IS-136 (TDMA technology) is the alternative to Digital (D)-AMPS, which has been supplanted by IS-2000 (CDMA2000).

Samsung cdmaOne mobile phone disassembled

Huawei CDMA2000 EVDO USB wireless modem (3G Technology)