Colloquium Speaker

Speaker:Mikael Degermark
Department of Computer Science
The University of Arizona
Topic:Robust Header Compression
Date:Thursday, May 11, 2000
Time:10:30 AM
Place:Gould-Simpson, Room 701

Refreshments will be served in the 7th-floor lobby of Gould-Simpson at 10:15 AM


Providers of wireless cellular services are beginning to embrace the Internet protocol suite in order to provide data services such as email, web access, etc, to their customers. Their voice services are, however, still based on traditional circuit-switched technology.

In order to deliver all services using TCP/IP, which would simplify the architecture and might be more cost effective, the current 200% header overhead for voice packets must be reduced. This is to be done over a channel which damages some 1-2% of all voice packets and where feedback is delayed several hundred milliseconds.

The talk will describe the problem in some detail and outline a couple of proposed solutions which in the case of voice are capable of reducing the 40-60 byte header down to 1-2 bytes.