ROHC - Robust Header Compression
This is the home of a free implementation of ROHC, Robust Header
Compression defined in RFC 3095. The implementation is currently
running under a Linux kernel, 2.4.20 and a PPP connection (over
Ethernet). Currently the framework and four profiles is implemented,
UDP, UDP-Lite, IP-Only and uncompressed. The main reason for this
project is releasing the code public and to help other with future
This project is released under GPL-license.
What is header compression?
There exist two types of compression for increasing the bandwidth
in a network. The first one is package compression, done on the data
itself. This is for example normally done by a webserver with
when a webpage is requested. Another method is to compress the
IP-header itself, something that is done between two linking points.
A normal IP-header on 20-byte can with ROHC be compressed to 1-byte
at maximum compression level. A UDP/IP-header can be compressed from
28-byte to 3-byte, saving 25-bytes. This is off course ideal cases.
An ideal environment to use header compression is in links with low
bandwidth, like in a cellular phone or a modem connection.
Context on this web page is Copyright © 2003 Martin Juhlin. All rights reserved