Chapter 6 Multiplexingand Error Detection/Correction 1/60 By Dr.Sukchatri P.

Slides:

Advertisements

Similar presentations

9-1 Chapter 9 - Communication Principles of Computer Architecture by M. Murdocca and V. Heuring © 1999 M. Murdocca and V. Heuring Principles of Computer.

Advertisements

Assessment 1 Review Network Layers. Computer 1Computer 2 2.

MULTIPLEXING APPLICATION The Telephone System. Telephone Network.

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

PART III DATA LINK LAYER. Position of the Data-Link Layer.

Practical Session 11 Codes. Hamming Distance General case: The distance between two code words is the amount of 1-bit changes required to reach from one.

7/2/2015Errors1 Transmission errors are a way of life. In the digital world an error means that a bit value is flipped. An error can be isolated to a single.

Chapter 10 Error Detection and Correction

Rutvi Shah1 ERROR CORRECTION & ERROR DETECTION Rutvi Shah2 Data can be corrupted during transmission. For reliable communication, errors must be detected.

Shashank Srivastava Motilal Nehru National Institute Of Technology, Allahabad Error Detection and Correction : Data Link Layer.

1 Kyung Hee University Data Link Layer PART III. 2 Kyung Hee University Position of the data-link layer.

1 Data Link Layer Lecture 20 Imran Ahmed University of Management & Technology.

PART III DATA LINK LAYER. Position of the Data-Link Layer.

McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Data Link Layer PART III.

McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Data Link Layer PART III.

CIT 307 Online Data Communications Error Detection Module 11 Kevin Siminski, Instructor.

Data and Computer Communications by William Stallings Eighth Edition Digital Data Communications Techniques Digital Data Communications Techniques Click.

McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Data Link Layer PART III.

10/27/ Data Link Layer - Lin 1 CPET/ECET Data Link Layer Data Communications and Networking Fall 2004 Professor Paul I-Hai Lin Electrical.

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

McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Chapter 6 Multiplexing.

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

Chapter 6 Multiplexing.

Chapter 6 Multiplexers and Switching Concepts

Overview All data can be corrupted, for reliable communications we must be able to detect and correct errors implemented at the data link and transport.

1 © Unitec New Zealand CRC calculation and Hammings code.

Error Detection.

1 Error Detection and Correction Martin Weiss. Slide 2 Objectives of this Meeting u Describe the major error detection techniques u Describe forward error.

10.1 Chapter 10 Error Detection and Correction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Error Detection and Correction

Datornätverk A – lektion 5 Kapitel 6: Multiplexing.

9-1 Chapter 9 - Communication Department of Information Technology, Radford University ITEC 352 Computer Organization Principles of Computer Architecture.

1 Kyung Hee University Error Detection and Correction.

McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Data Link Layer PART III.

Transmission Media Sharing When can you share? –High Medium capacity Why share ? –Less transmission costs –More cost-effective transmissions How would.

Data Link Layer 1. 2 Single-bit error 3 Multiple-bit error 4.

Chi-Cheng Lin, Winona State University CS412 Introduction to Computer Networking & Telecommunication Error Correction/Detection.

Computer Network Lab. 1 8 장 다중화 (Multiplexing) 8.1 Many to One/One to Many 8.2 Type of Multiplexing 8.3 Multiplexing Application : Telephone system 8.4.

ERROR DETECTION AND CORRECTION Chapter 8 Data Communications & Networking ERROR DETECTION AND CORRECTION Chapter 8 First Semester 2007/2008.

Chapter Nine: Data Transmission. Introduction Binary data is transmitted by either by serial or parallel methods Data transmission over long distances.

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

Lecture 2.4. Multiplexing. Learning Outcomes Discuss the concept of Multiplexing Explain & calculate frequency-division multiplexing. Explain & calculate.

10.1 Types of Errors 10.2 Detection 10.3 Error Correction.

Computer Network Lab. 1 9 장 Error Detection and Correction 9.1 Types of Errors 9.2 Detection 9.3 Error Correction 9.4 요약.

1 Kyung Hee University Prof. Choong Seon HONG Error Detection and Correction.

Lecture # 18 Data Communication Muhammad Waseem Iqbal.

ERROR DETECTION AND CORRECTION

Many to one/one to many Types of multiplexing Telephone system

Bandwidth Utilization: Multiplexing and Spreading

CIS 321 Data Communications & Networking

Data Link Layer.

Chapter 6 Multiplexing.

Error Detection Bit Error Rate(BER): It is the ratio of number Ne of errors appearing over a certain time interval t to the number Nt of 1 and 0 pulses.

PART III Data Link Layer.

Basic concepts Networks must be able to transfer data from one device to another with complete accuracy. Data can be corrupted during transmission. For.

Chapter 7 Error Detection and Correction

Chapter 9 Error Detection and Correction

DATA COMMUNICATION Lecture-35.

Chapter Nine: Data Transmission

Chapter 6 Multiplexing.

Bandwidth Utilization: Multiplexing and Spreading

DATA COMMUNICATION Lecture-33.

Chapter 9 Error Detection and Correction

Many to one/one to many Types of multiplexing Telephone system

Error Detection and Correction

Chapter 6 Multiplexing.

DATA COMMUNICATION Lecture-34.

Datornätverk A – lektion 5

Presentation transcript:

Chapter 6 Multiplexingand Error Detection/Correction 1/60 By Dr.Sukchatri P.

Contents 2/60 Multiplexing Many to one/one to many Types of multiplexing Telephone system Error Detection/Correction Types of Errors Detection Correction

Multiplexer/Demultiplexer

Multiplexing VS No Multiplexing 5/60

Catagories of multiplexing

Type of Multiplexer

Frequency Division Multiplex (FDM)

Time Division Multiplex (TDM)

FDM Multiplexing process, Time domain

FDM Multiplexing process, Frequency domain

FDM demultiplexing process, time domian

FDM demultiplexing, frequency domain

Time-Division Multiplexing (TDM)

Synchronous TDM

Synchronous TDM, multiplexing process

Synchronous TDM, demultiplexing process

Framing bits

Data rate calculation for frames

Asynchronous TDM

Examples of asynchronous TDM frames A.Case 1 : only three lines sending data

Examples of asynchronous TDM frames B.Case 2 : only four lines sending data

C. Case 3 : all five lines sending data Examples of asynchronous TDM frames

Multiplexing and inverse multiplexing

Telephone network

Catagories of Telephone service

Catagories of analog services

Analog switched service

Analog leased service

Analog hierarchy

Categories of Digital services

Switched/56 services

DDS services (Digital Data Service) DSU : Digital Service Unit

DS hierarchy (Digital Signal)

T-1 line for multiplexing telephone lines PCM: Plus Code Modulation :> convert analog-digital

T-1 frame structure

Fractional T-1 line DSU : Digital Service Unit CSU : Channel Service Unit

Types of errors Error Detection and Correction

Single-bit error

Multiple-bit error

Burst error of length five

Redundancy

Detection methods

Even parity VRC concept

Longitudinal Redundancy Check (LRC)

VRC and LRC

Cyclic Redundacy Check (CRC) CRC generator and checker

Binary division in a CRC generator

Polynomial

A polynomial representing a divisor

Standard polynomials

Checksum

Data unit and checksum

Error Correction Data and redundancy bits

Positions of redundancy bits in Hamming code

Redundancy bits calculation : Hamming Code

Example of redundancy bit calculation

Single-bit error

Error detection using Hamming code

Questions/Answers