Browse Prior Art Database

PPP Predictor Compression Protocol (RFC1978)

IP.com Disclosure Number: IPCOM000004196D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 8 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Rand: AUTHOR

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method of encapsulating multiple protocol datagrams over point-to-point links.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 16% of the total text.

Network Working Group D. Rand

Request for Comments: 1978 Novell

Category: Informational August 1996

PPP Predictor Compression Protocol

Status of This Memo

This memo provides information for the Internet community. This memo

does not specify an Internet standard of any kind. Distribution of

this memo is unlimited.

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method of

encapsulating multiple protocol datagrams over point-to-point links.

The PPP Compression Control Protocol [2] provides a method for

transporting multi-protocol datagrams over PPP encapsulated links.

This document describes the use of the Predictor data compression

algorithm for compressing PPP encapsulated packets.

Table of Contents

1. Introduction ...................................... 1

2. Licensing ......................................... 2

3. Predictor Packets ................................. 2

3.1 Predictor theory ............................ 2

3.2 Encapsulation for Predictor type 1 .......... 7

3.3 Encapsulation for Predictor type 2 .......... 8

4. Configuration Option Format ....................... 9

SECURITY CONSIDERATIONS .................................. 9

REFERENCES ............................................... 9

ACKNOWLEDGEMENTS ......................................... 9

CHAIR'S ADDRESS .......................................... 9

AUTHOR'S ADDRESS ......................................... 9

1. Introduction

Predictor is a high speed compression algorithm, available without

license fees. The compression ratio obtained using predictor is not

as good as other compression algorithms, but it remains one of the

fastest algorithms available.

Note that although care has been taken to ensure that the following

code does not infringe any patents, there is no assurance that it is

not covered by a patent.

2. Licensing

There are no license fees or costs associated with using the

Predictor algorithm.

Use the following code at your own risk.

3. Predictor Packets

Before any Predictor packets may be communicated, PPP must reach the

Network-Layer Protocol phase, and the Compression Control Protocol

must reach the Opened state.

Exactly one Predictor datagram is encapsulated in the PPP Information

field, where the PPP Protocol field indicates type hex 00FD

(compressed datagram).

The maximum leng...