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2011年4月14日星期四

Brief Introduction of TD-LTE

TD-LTE, also named LTE TDD, is Long Term Evolution in TDD mode. It not only
provides higher data rates and larger capacity but also decreases service delay.
Therefore, TD-LTE has the ability to provide more satisfied real time and high
speed services. Operators will benefit from TD-LTE on reducing operational costs
and attracting high end subscribers.

Sufficient TDD Spectrum Resource

According to ITU allocation, TD-LTE can use sufficient spectrum resources. Today
frequency resource is increasingly overcrowded in many countries, and it is even
more difficult to apply the paired spectrums. TD-LTE brings new opportunities to
network operators as it need not paired spectrum resource and can be operated on
dispersed frequency bands flexibly. Furthermore, the global roaming of TD-LTE
will be achieved easily because many countries are allocated with the same TDD
bands.

Flexible TDD Configuration

The TD-LTE system demonstrates distinct advantages in supporting asymmetric data
services. In the TD-LTE frames, the number of uplink timeslots and downlink
timeslots can be flexibly configured to meet different service types. When the
downlink traffic is bigger than the uplink traffic, more downlink timeslots will
be configured; when the traffic is balanced on both links, the number of uplink
and downlink timeslots will be evenly allocated.
ZTE is actively involved in research and development of TD-LTE from the first
beginning. Now, ZTE holds the leading position in TD-LTE field based on its
accumulation of wireless telecommunications. Meanwhile, ZTE also devotes itself
to the establishment of 3GPP LTE standards. ZTE is in-depth cooperating with
global mainstream operators to promote the development of TD-LTE industry.

End to end Solution

ZTE can provide End to End TD-LTE solution, including EPC, eUTRAN, Terminals,
and Chipsets. ZTE is the first company completed the China Mobile (CMCC) TD-LTE
field tests and submitted the result to LSTI (Long Term Evolution/System
Architecture Evolution Trial Initiative). ZTE and Hong Kong Applied Science and
Technology Research Institute (ASTRI) also achieves the No.1 in the industry to
jointly submit LTE TDD Interoperability Development Testing (IODT) report to the
LSTI organization, which was confirmed by LSTI on September 1st 2009.

Uni-RAN – the solution of evolution and convergence

ZTE's Uni-RAN solution is based on the SDR technology. It is the Uni-RAN
solution, which supports 2G (CDMA/GSM) + TD-LTE and 3G (TD-SCDMA/UMTS) + TD-LTE,
that simplifies the network evolution and convergence. Multiple systems could be
converged as a single network with the unified hardware and unified OMC. Not
only GSM/TD-SCMA operators but also CDMA and UMTS operators can achieve the
high-speed, green, converged TD-LTE network with significantly reduced TCO.

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