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PPP LZS-DCP Compression Protocol (LZS-DCP) (RFC1967)

IP.com Disclosure Number: IPCOM000004255D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2019-Feb-12
Document File: 18 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Schneider: AUTHOR [+1]

Related Documents

10.17487/RFC1967: DOI

Abstract

This document describes the use of the Stac LZS data compression algorithm for compressing PPP encapsulated packets, using a DCP header [6]. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 10% of the total text.

Network Working Group K. Schneider Request for Comments: 1967 ADTRAN, Inc. Category: Informational R. Friend Stac Technology August 1996

PPP LZS-DCP Compression Protocol (LZS-DCP)

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 for transporting multi-protocol datagrams over point-to-point links.

The PPP Compression Control Protocol [2] provides a method to negotiate and utilize compression protocols over PPP encapsulated links.

This document describes the use of the Stac LZS data compression algorithm for compressing PPP encapsulated packets, using a DCP header [6]. This protocol is an enhanced version of the non-DCP (Option 17) PPP Stac LZS compression protocol [5], and will be referred to as the LZS-DCP Compression Protocol.

Table of Contents

1. Introduction .......................................... 2 1.1 Licensing ....................................... 3 1.2 Specification of Requirements ................... 3 1.3 Terminology ..................................... 3 2. LZS-DCP Packets ....................................... 4 2.1 Example LZS-DCP Packets ......................... 5 2.2 Padding ......................................... 6 2.3 Reliabliity and Squencing ....................... 6 2.4 Data Expansion .................................. 6 2.5 Packet Format ................................... 7 2.5.1 PPP Protocol .................................... 7 2.5.2 DCP-Header ...................................... 8 2.5.3 History Number .................................. 9 2.5.4 Sequence Number ................................. 9 2.5.5 Data ............................................ 10 2.5.6 Longitudinal Check Byte ......................... 10

Schneider & Friend Informational [Page 1]

RFC 1967 LZS-DCP August 1996

2.5.7 Compressed Data ................................. 11 3. Sending Compressed Datagrams ..................... 11 3.1 Transmitter Process ............................. 11 3.2 Receiver Process ................................ 12 3.3 History Maintenance ............................. 13 3.4 Anti-Expansion Mechanism ........................ 14 3.5 History Resynchronization Mechanism ............. 14 4. Configuration Option Format ........................... 15 SECURITY CONSIDERATIONS ...................................... 16 REFERENCES ................................................... 17 CHAIR’S ADDRESS .............................................. 17 AUTHORS’ ADDRESSES ........................................... 18

1. Introduction

Starting with a sliding window compression history, similar to LZ1 [3], Stac Electronics developed a compression algorithm identified as Stac LZS. A PPP Compression Protocol for this compression algorithm was developed and published [5]. That protocol was taken as a basis for data compression work do...

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