Error control

4/25/97


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Table of Contents

Error control

CRC

Implementation

Software schemes

Packet errors

Types of packet errors

Types of packet errors (cont.)

Packet error detection and correction

Sequence numbers

Using sequence numbers

Sequence number size

MPL

Sequence number size (cont.)

Packet insertion

Packet insertion in the Internet

Solutions

Solutions (cont.)

3-way handshake

3-way handshake

Loss detection

Nacks

Timeouts

Timeout schemes

Old TCP scheme

New TCP scheme (Jacobson)

Intrinsic problems

Retransmissions

Error control window

Go back N retransmission

Selective retransmission

Fast retransmit

SMART

Author: S. Keshav

Email: skeshav@cs.cornell.edu

Home Page: http://www.cs.cornell.edu/home/skeshav

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