Topics Mobile Tech News Sunday, April 21


Contact us

Site search:
complete archives list

Site Sponsors:

Don't forget AT&T and Verizon promo codes at to save money.

Ericsson and Japan Telecom trial Voice-over-IP over WCDMA
Posted: 06-Sep-2000 [Source: Ericsson]

[Japan Telecom has experimentally carried voice over an all IP-based mobile network using WCDMA.]

Chiba, Japan -- Ericsson and Japan Telecom have successfully completed the world's first field trial of Voice over IP over WCDMA. The field trial results prove that voice can be efficiently transported over an IP-based mobile network, including the cellular air-interface, to mobile terminals, with full quality of voice service as well as full quality of other service features such as data, without loss of capacity.

The trial was made over Japan Telecom's WCDMA experimental system by running Ericsson's new robust header-compression algorithm, called Robust Checksum-based Header Compression (ROCCO), which is currently undergoing standardization within the Internet Engineering Task Force.

The field trial was conducted in July and August with Japan Telecom at its network center in Chiba, Japan.

Voice has special demands on quality, and until now the challenge has been to achieve high enough voice quality over a multiservice fixed IP network.

"The trend in today's telecoms industry is towards 'all-IP' transport networks," says Hakan Eriksson, Vice President and General Manger, Ericsson Research. "Operators want to be able to use the same network for all services; data, voice and video. The field trial conducted together with Japan Telecom has proven that it is possible to transport voice over an IP-based mobile network, without compromising quality or system performance."

"As the trend of wireless communications demands all service data to run on the same operating network, increasing efficiency of using WCDMA frequency is the main concern for securing service quality on an 'all-IP' network as well as promoting the quality in network operation," says Tetsuya Yuge, Vice President, Information and Communication Lab. of Japan Telecom. "I believe that the success in this trial gave us further breakthrough in the future mobile Internet that requires high quality and broadband all-IP needs."


Back to Headlines...

Apple Watch Apple Watch

iPhone 6 and iPhone 6 Plus iPhone 6 and iPhone 6 Plus

Amazon Fire Amazon Fire

Samsung Z - Tizen Samsung Z - Tizen


HTC One mini 2 HTC One mini 2

OnePlus One OnePlus One

HTC One (M8) HTC One (M8)

Samsung Gear 2 Tizen Watch Samsung Gear 2 Tizen Watch

HP VoiceTab HP VoiceTab

T200 octa-core T200 octa-core

Nokia 2520 Tablet Nokia 2520 Tablet

Samsung Galaxy Round Samsung Galaxy Round

BlackBerry Z30 BlackBerry Z30

iPhone 5S and iPhone 5C iPhone 5S and iPhone 5C

Samsung Galaxy Mega Samsung Galaxy Mega

Sony SmartWatch 2 Sony SmartWatch 2

iOS 7 iOS 7

Jolla Jolla

BlackBerry Z10 BlackBerry Z10

Galaxy S 4 Galaxy S 4

Galaxy Note 8.0 Galaxy Note 8.0

Ubuntu on Tablets Ubuntu on Tablets

LG Optimus G Pro L-04E LG Optimus G Pro L-04E

Firefox OS Firefox OS

Sony Zperia Z Sony Zperia Z


Valid HTML 4.1!

RSS © 1999-2019 Traques LLC
All times recorded in UTC