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.
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
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