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To: Jack Jackson who wrote (8069)	3/30/2000 12:08:00 PM
From: Dennis Roth	Read Replies (1) \| Respond to of 13582

Siemens makes first UMTS call over TD-CDMA (TDD) air interface Story Filed: Thursday, March 30, 2000 11:39 AM EST Source URL: library.northernlight.com MAR 30, 2000, M2 Communications - Siemens Information and Communication Networks announced that Roke Manor Research Ltd., Siemens' research and development centre in the UK, has made the world's first UMTS call over a TD-CDMA (TDD) air interface. After the recent decision of the Third-Generation Partnership Project (3GPP) to not only establish a worldwide standard for W-CDMA, but also lay the foundation for a standardized TD-CDMA air interface within the UMTS "Release 99", this technological breakthrough represents another major leap into the future of mobile communications. The progress regarding the standardization and the technological development of both modes has brought the European proposal for third-generation mobile communications - UMTS (Universal Mobile Telecommunications System) - to the world's attention, allowing the complete system to be made ready for the market. The proposal for IMT-2000/UMTS, the next generation of mobile communications technology, is based on the UTRA (Universal Terrestrial Radio Access) air interface, which provides two radio modes for connecting mobile handsets and base stations: W-CDMA (FDD) and TD-CDMA (TDD). The use of both modes, which are controlled from a network, makes it possible to construct highly flexible networks, facilitates the provision of powerful combined voice and data services, and paves the way for seamless global radio coverage. As part of the IMT-2000 "family of standards" for third- generation mobile communications, the UTRA air interface, and thus UMTS, recently became the world's first mobile communications standard by way of "Release 99", thus proving the economical usefulness of both paired and unpaired frequency bands within UMTS. The successfully demonstrated Siemens TDD test network was developed by Roke Manor Research and will soon allow mobile network operators to begin evaluating the TDD component of UMTS. As a fully owned Siemens company, Roke Manor Research Ltd. is specialized in research and development of communication networks, products and sensors. It was founded in 1956 and to date employs over 400 people, more than 300 of which are engineers. Through the recently established joint venture Mobisphere Ltd., Siemens is currently working together intensively with its technology partner NEC Corporation on developing products for both UMTS/UTRA modes - FDD and TDD. Extensive research and development resources within both companies (e.g. Telecom Modus of NEC, Roke Manor Research of Siemens) support these activities. Furthermore, research and development for TDD systems are also being performed in cooperation with NTT DoCoMo Inc., Japan. Background information The Universal Mobile Telecommunication System (UMTS), Europe's proposal for third-generation mobile communications, is based on an air interface that offers two complementary radio technologies: FDD mode (W-CDMA) and TDD mode (TD-CDMA). While FDD mode is especially well suited to wide-area coverage and broadband, symmetrical radio applications such as mobile video telephony, TDD mode provides even higher data rates for asymmetrical applications and low mobility requirements, including Internet-based services in heavily populated areas. The combination of both technologies, coupled with the efficient use of radio frequencies, offers not only high-quality voice services, but also numerous add-on services such as fast mobile Internet access and mobile multimedia. These services are playing an increasingly significant role in advanced telecommunications markets. Over the short term, third-generation mobile communications will not replace all existing mobile networks. Instead, the initial phase will be marked by a smooth transition from today's GSM networks to the new technology. Third-generation mobile networks will first be established in "hot spots" - city centers with a high subscriber and usage density. The existing GSM networks will continue to complement the mobile communications provision for a transitional period of five to seven years, particularly as far as coverage and voice services are concerned. UMTS is expected to go into commercial service in 2001. Abbreviations: EDGE -- Enhanced Data Rate for GSM Evolution FDD -- Frequency Division Duplex GSM -- Global System for Mobile Communications IMT-2000 -- International Mobile Telecommunications 2000 Standard TD-CDMA -- Time Division Code Division Multiple Access TDD -- Time Division Duplex UMTS -- Universal Mobile Telecommunications System UTRA -- Universal Terrestrial Radio Access W-CDMA -- Wideband Code Division Multiple Access Copyright 1994-2000 M2 COMMUNICATIONS LTD CONTACT: Vikki Millichamp, Publicity Officer, Roke Manor Research Tel: +44 (0)1794 833463 Fax: +44 (0)1794 526938 e-mail: vikki.millichamp@roke.co.uk ================ Yesterday Sprint, Samsung and QUALCOMM announce their first 3G call, today the TD-CDMA camp fires back. The war by press release continues, - DPR