The China Academy of Telecommunications Technology (CATT) and the Siemens Information and Communication Mobile Group (IC Mobile) have announced further steps in their joint development of TD-SCDMA (Time Division - Synchronous Code Division Multiple Access) 3G mobile radio technology. An agreement to this effect was signed today during the Sino-German High Tech Forum 2001 in Beijing. News was also announced of the successful startup of the first TD-SCDMA test networks set up jointly on behalf of the Chinese government.

n addition to joint cooperation on setting up and operating further TD-SCDMA test networks in China, the agreement just signed by CATT and Siemens IC Mobile includes an OEM (Original Equipment Manufacturer) agreement allowing each partner to produce and market the jointly developed mobile radio technology independently.

CATT, a research institute of the Chinese Ministry of Information Industry (MII), and Siemens IC Mobile have been cooperating on developing technologies for third generation mobile radio since 1998.

The cooperation achieved a major result in March 2001 when the 3GPP – an initiative of all large international telecommunications standardizing bodies – officially recognized the jointly developed TD-SCDMA radio transmission system as a global 3G/UMTS standard. Current activities are focusing on the further development of infrastructure components into commercially available TD-SCDMA systems. CATT and Siemens IC Mobile started setting up TD-SCDMA test networks on behalf of the MII having successfully carried out initial voice and video transmissions over TD-SCDMA in April and July of this year. The first test network went into operation in early October.

Background

Within the radio network for UMTS, called UTRA (Universal Terrestrial Radio Access), TDD (Time Division Duplex) has been globally recognized as a universal standard for 3G/UMTS alongside FDD (Frequency Division Duplex or Wideband CDMA). In March 2001 the 3GPP established the global harmonization and expansion of TDD's performance range. In so doing it extended the specifications for this 3G/UMTS standard to include the additional features of TD-SCDMA radio technology jointly developed in China by Siemens IC Mobile and CATT. As a result of this 3GPP decision the TDD technology jointly developed by Siemens IC Mobile and CATT now has equal status within the UMTS standard with the already acknowledged FDD transmission system. Global recognition will ensure that W-CDMA and TD-SCDMA will not only be able to communicate smoothly with each other but also with the GSM (Global System for Mobile Communications) standard currently in use. With W-CDMA and TD-SCDMA, Siemens IC Mobile will be able to offer very efficient 3G technologies in both Asia and Europe.

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last updated: January 12, 2004

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