Ericsson has closed the circle from the initial idea to verification by hosting a successful Robust Header Compression, ROHC, interoperability test recently in Sweden. ROHC means performance gains of typically 50 percent for IP based services in all 3G systems.

Robust header compression, ROHC, will be used in all 3G cellular systems (WCDMA, EDGE and, CDMA2000), substantially improving spectrum efficiency and service quality for IP services such as voice or video in Mobile Internet.

ROHC has been included in 3GPP specifications and is a new Internet Engineering Task Force (IETF) proposed standard, developed to increase efficiency over wireless links by compressing IP headers. For wireless IP services such as voice, the ROHC scheme reduces packet size by 75 percent for IPv6 while still maintaining robustness to transmission errors common on wireless links.

Ericsson has pioneered in this field, proposing a solution and driving the standards process. In collaboration with Luleå University of Technology in Sweden, Ericsson presented the first robust header compression scheme called ROCCO to the IETF in June 1999.

In July 2000, Ericsson and Japan Telecom successfully completed the world's first field trial of Voice over IP over WCDMA, using ROCCO. The ROCCO scheme provided a major contribution to today's ROHC standard.

The interoperability test was conducted together with Nokia, Siemens/Roke Manor Research, Effnet and Panasonic. The test covered the major parts of the ROHC standard including test of robustness over emulated WCDMA/3G links.