4. Overview of Datang Group
One of key players in China’s
telecommunications industry with
broad range of product sections
Previous CATT (China Academy of
Telecommunication Technology)
Including 2 listing companies, 7
Joint ventureshare-holding
companies and 8 research institute
With more than 10,000 employees,
70% of which are engineers;
4
5. Organization
Datang Telecom and Technology Industry Group
Headquarter
Datang Telecom
Datang Mobile Xin Wei, GaoHong
Research Institute.
Technology
Communications and Xingtang etc.
Co., Ltd
Equipment Co.Ltd
5
6. Datang Mobile
Core TD-SCDMA Experienced
Established on February, 2002
Technology Team
consolidating all the mobile
assets within the Group
Focusing on developing 3G and
further wireless solution,
providing TD-SCDMA products
and service
A leading company in TD-SCDMA
industry Business
Industry
relationships
Resource
6
8. Our Business
Enable TD-SCDMA to Success
Service
al
Product ion n-
ss o
Technology
ofe ces
Pr rvi d
We provide the se man
We provide
de
innovative and the best TD-
qualified technology SCDMA total
and IPR to help TD- solution to
SCDMA manufactures facility
success… operators and
manufactures
8
11. International 3G Standard
☞ 3G Technology: CDMA
– TDD Mode: TD-SCDMA (China), UTRA-TDD (Europe)
– FDD Mode: WCDMA (Europe & Japan), CDMA2000 (U.S.)
☞ TD-SCDMA, is the sole TDD product with the potential in mass
commercialization in China.
TDD
FDD
CDMA CDMA UTRA TD-
MC DS TDD SCDMA
11
12. TD-SCDMA Standard
• ITU acceptation in 1998 and approval in
WRC2000
• Harmonization with UMTS on CN and
architecture
• Included in 3GPP from R’4 (2001) to R’7(now)
• Specifications fixed and mature for R’4/5,
• New features and technologies introduced
after R’5 and LTE
• Has the characteristics for Beyond 3G
defined in ITU
12
13. What is TD-SCDMA
time
y
d b de
e
tifi A co
n
id e DM Dow
e nli
C
l l b t ed nk
i
r w ca
se allo
u
ch arily
Ea or Dow
p nli
em
code nk
t
Max.16
Uplin
k code
channels
Dow
nli nk
t
sl o
e
Tim
1.6 M frequency
Hz
Combined with the advantages of CDMA、TDMA、FDMA
Spectrum efficiency and anti-interference capability
13
14. 3GPP TDD vs. FDD
3GPP
WCDMA
FDD
physical layer
CN
RNC
Node B
TDD
TD-SCDMA
physical layer
14
16. TDD duplex
UL/DL share the same TDD
frequency on time slots
Switch point for UL/DL
flexible for (a)symmetric UUDDDDDD
D
services
FDD
The similar radio
channel environment DDDDDD
for UL/DL for easy
adoption of
UU
technologies e.g. SA
Unpaired band
U Uplink D Downlink Empty
16
17. Smart Antenna
With Smart Antenna ...
Directional TX and RX
UE is tracked during connection
W/O Smart Antenna ...
Omni-directional TX and RX
interference from/to adjacent cells
The advantages of SA
Minimizing inter/intra-cell interference
Effective TX power
Improved receiving sensitivity
Increased coverage and capacity
Reduced Node B cost for RF
17
18. Joint Detection
MAI is the major interference in the CDMA system.
Traditional signal processing to deal MAI as noise
JD optimizes the specific user signal, including:
Specific user signal channel code
Specific training sequence
Process all the signals in parallel to eliminate MAI
18
19. Synchronized CDMA
Uu
UL signals from UE arrived NodeB
CODE1
the NodeB synchronized
.
Minimizd MAI to simplified CODE2
signal processing on Node
B, and to reduce the cost
Including establishment,
dynamic maintainance of
synchronization, and the
CODEN
accurate tracking control
t
19
20. Baton Handover
UE hand over with pre
UL sync and stepped
RNC
switch for UL/DL WCDMA
TD-SCDMA
CDMA2000
Less channel
RNC
occupation compared
with soft hand over
Shorter switch gap and
NodeB
higher reliabilility
NodeB
compared with hard
hand over
NodeB
Baton Handover Soft Handover
20
21. Dynamic Channel Allocation
Optimal and adaptive
allocation of the radio
resources according to the
Code
interference scenario Time
DCA aspects include:
• Code domain: spreading
code
• Time domain: time slots
• Space domain: beam
forming
Space Frequency
• Frequency domain: carrier
21
22. Advantages of TD-SCDMA
With its key features, TD-
SCDMA has become the
most competitive in the
international 3G standard.
Full service
Spectrum
TD-SCDMA can help improve
capacity
efficiency
the competitiveness of
operators and the rich
application for the users.
Powerful data application
enables TD-SCDMA the most
Smooth
promising 3G technology.
migration
22
32. TD-SCDMA Tests
Dec 2002 Dec 2003 Oct 2004 Jun 2005
Completing
Passing the Finishing the the indoor
TD-SCDMA
MTnet phase air interface and outdoor
Industrialization test
MTnet phase
I test test
II test
Completed tests Test plan
32
33. Commercial Plan
2006
Mass deployment
Commercialization
2005 Pre-commercialization
Industrialization
33
