Qualcomm and Teleepoch
Enter Into a 3G CDMA Subscriber Unit License Agreement, October
6, 2007
MTN chooses Cambridge Broadband
Networks for multi-service wireless network in Rwanda, October 6,
2007
Brazilian government to
publish 3G bidding rules soon, October 6, 2007
KTF 3G service suffers
from technical problems, October 6, 2007
Argentina’s Personal
lunches 3G service in Rosario, October 6, 2007
Russia has it's first 3G
network, October 6, 2007
AT&T could drop Alcatel-Lucent
as 3G mobile network supplier, October 6, 2007
Enea Extends License Agreement
with ZTE for 3G Handsets, October 2, 2007
LG to unveil premium handsets
in Brazil, October 2, 2007
KTF 3G subscribers doubled
in less than 3 months, October 2, 2007
3G policy in India will
be non-uniform, October 2, 2007
- previous news
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TD-SCDMA Forum joins 3GPP
June 25, 2003
The Organizational Partners of the 3GPP have approved an application
by the TD-SCDMA Forum to become a Market Representation Partner within
the project. 3GPP develops specifications for a 3rd Generation mobile
technology which is being embodied in communications systems which offer
users access to multimedia services on the move.
Market Representation Partners provide a market dimension to the specification
work of 3GPP, ensuring that the project consistently responds to the needs
of the mobile communications industry. Established in December 2000, the
TD-SCDMA Forum brings to 3GPP its commitment to promote TD-SCDMA as part
of the global family of 3G technologies. TD-SCDMA has been developed by
the Chinese Wireless Telecommunications Standards group, CWTS, with the
support of a number of manufacturers, and has been included in the specifications
of 3GPP since 2001.
The radio interface defined by 3GPP for communication between the User
Equipment and the base station is known as UTRA - Universal Terrestrial
Radio Access - and it is the principal distinguishing feature of the 3GPP
technology.
It is defined for two basic modes of operation: Frequency Division Duplex
(FDD) and Time Division Duplex (TDD). Each mode has its particular strengths,
according to the type of traffic to be carried. TDD has a particular attraction
in that it can be implemented in unpaired spectrum (and is well suited
to asymmetric traffic), whilst FDD always needs paired frequency bands.
Spectrum is always a rare resource so, as frequencies are made available
in future for 3G, it is likely that much of it will be unpaired.
Both modes were initially defined by 3GPP to use spreading codes with
a chip rate of 3.84 Mcps (mega chips per second). Subsequently, proposals
from CWTS were adopted by 3GPP to define a second TDD mode that uses a
chip rate of 1.28 Mcps, one consequence of which is the ability to use
narrower frequency bands than for basic TDD or FDD. This mode is therefore
known as "Low Chip Rate TDD" or "Narrow-band TDD". All three modes (FDD
and the two TDD modes) have been agreed by the ITU as part of its IMT-2000
family of radio interface technologies.
By fully integrating this technology within the TDD specification, 3GPP
is ensuring that no unnecessary disparity occurs and that the maximum
commonality between the modes is maintained. Narrow-band TDD can be supported
on unpaired frequency bands of 1.6MHz, making it possible to accommodate
very conveniently on existing GSM frequency allocations. Given that 3GPP
has sought to define its 3G system as an evolution, as far as possible,
of GSM, Narrow-band TDD is an attractive option for bringing 3G capability
to existing GSM networks relatively inexpensively.
The TD-SCDMA Forum is headquartered in Beijing, China, and is strongly
supported by Chinese industry. Nevertheless, it is eager to share its
technology with mobile operators and manufacturers world-wide, a fact
reflected in its logo.
Dr Asok Chatterjee, Chairman of the 3GPP Project Co-ordination Group
and representative of the USA's T1 Standards Committee, warmly welcomed
the decision of the Organizational Partners to accept the Forum's application:
"I am delighted that the developers and supporters of the TD-SCDMA technology,
many of them Chinese organizations, have chosen to promote it through
3GPP. The fact that the technology has also been approved by the ITU is
a sign of its world-wide potential, and I am happy to assure the Forum
of our commitment to help promote TD-SCDMA as a fully recognized member
of the top-quality set of 3GPP global standards."
The addition of the TD-SCDMA Forum to the 3rd Generation Partnership
Project brings the number of Market Representation Partners to six.
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3G Motorola A920
