International Telecommunication Union
TD-SCDMA and
TDSCDMA Forum
Dr. Li Wan Lin
Vice Chairman of TD-SCDMA Forum
Workshop on Next Generation Networks: What, When & How?
Geneva, 9-10 July 2003
What is TD-SCDMA ?
ITU-T
Majority of the IMT-2000 spectrum in China has been allocated to TD-SCDMA;
which is an ITU recognized IMT-2000 radio technology (see M.1457). It is a
highly efficient radio technology that is suitable for any network scenario.
Since it forms part of the UMTS family (3GPP standards), it can be used as a
stand alone, migration from GSM/GPRS to IMT-2000 or as a complement to
UTRA FDD (W-CDMA). The respective ITU Recommendations are M.1457 and
Q.1741.2 onwards (i.e. 3GPP Release R4 onwards).
TD-SCDMA combines four multiple access techniques; in particular it brings
the benefits of both the Time Division Duplex and Code Division Multiple
Access. With Joint Detection, Dynamic Channel Allocation and Smart
Antenna, inter cell interference is considerably minimised for most efficient
use of the spectrum.
What is the status of TD-SCDMA ?
Since 1998, both network infrastructure and the Mobile Terminal are being
developed by globally well known industry leaders. The same is true for Test
Equipment and Test Tools.
Network Acceptance tests have been successfully carried out in Beijing with
both high speed (125Km/hr) and long range (>20Km) video transmission test
carried out successfully. Data speeds of up to 384 Kbps have also been
performed as part of general acceptance tests; thus meeting the data
requirements of IMT-2000.
9-10 July 2003
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What is TD-SCDMA Alliance ?
ITU-T
Founded in 2002, it is fully supported by three Chinese Ministries (SDPC, MII
and MOST) and has, as founding members, seven major Chinese mobile
equipment, chipsets and terminal manufacturers. It also has more than 25
foreign manufacturers as members and the list is growing.
What is TD-SCDMA Forum ?
Counting more than 410 members in the category of operators,
manufacturers, Chip-set providers, R&D institutions, content providers and
Venture Capital firms – both local and global – it was founded in 2000, with
the assistance of the Chinese Ministries.
The forum’s main focus is further technology development of TD-SCDMA,
industrialization promotion and further marketing promotion.
With China as a major world-wide mobile market (having overtaken USA) and
with the majority of IMT-2000 world-wide harmonised spectrum assigned to
TD-SCDMA, this efficient technology will be a major player in providing a very
cost-effective evolution path from GSM/GPRS to IMT-2000.
9-10 July 2003
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