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Application Analysis on TD-LTE Train-to-ground
Wireless Telecommunications
Zhengzhou Metro Co., Ltd. Zhengzhou Rail Transit Design and Research Institute Co., Ltd.
Huawei Technologies Co., Ltd. Beijing Urban Engineering Design & Research Institute Co., Ltd.
Contents
Acknowledgements 1
Requirements 2
Technology Selection 3
System Solution 4
Goals and Achievements
5
Application Value Promotion
6
1 Acknowledgements
1.1 Provincial and municipal governments
1.2 Companies participating in the project construction
1.3 Institutions contributing to related scientific achievements
1 Acknowledgements
Department of Industry in Henan Province Henan Radio Management Committee
Zhengzhou Metro Co., Ltd.
Zhengzhou Rail Transit Design and Research Institute Co., Ltd.
Beijing Urban Engineering Design & Research Institute Co., Ltd.
Huawei Technologies Co., Ltd.
China Railway Electrification Bureau Group Co., Ltd.
Shenzhen GrenTech Co., Ltd
Andrew Telecommunications (China) Co., Ltd.
2 Requirements
2.1 Information Required for Train-to-ground
Wireless Communications
2.2 Analysis on Requirements for Train-to-ground
Wireless Telecommunications
2.3 Technology Requirements on Train-to-ground Wireless
Communications
2.1 Information Required for Train-to-ground Wireless Communications
• Cab image
• Vehicle detection information
• Overhead contact line system monitoring information
• Vehicle-mounted FAS
Data information
• TETRA dispatching information
• Radio network information of operators Voice information
• Carriage image information
• Passenger information collection Security information
• PIS multimedia information
• Vehicle-mounted broadcast information Service information
• CBTC information Control information
2.2 Analysis on Requirements for Train-to-ground Wireless Telecommunications
Carri
age
imag
e
Uplo
ad
HD
imag
e in
real
time
PIS
infor
matio
n
Play
in
real
time
Vehic
le-
moun
ted
radio
Broa
dcast
in a
centr
alized
mann
er
Vehi
cle-
moun
ted
FAS
infor
matio
n
Uplo
ad in
real
time
Wirel
ess
dispat
ching
infor
matio
n
voice
C
B
T
C
infor
mati
on
Use
AP
to
trans
port
signa
ls
Vehi
cle
detec
tion
infor
matio
n
Uplo
ad in
real
time
Coll
ecti
on
of
pass
eng
er
info
rmat
ion
Upl
oad
in
real
time
Cab
imag
e
Uplo
ad
HD
imag
e in
real
time
Ima
ge
infor
mati
on in
the
acce
ss
netw
ork
Uplo
ad
Othe
r
infor
mati
on
R
ec
or
d
an
d
pl
ay
N
o
n-
re
al
ti
m
e
S
D
N
o
n-
re
al
ti
m
e
S
D
R
ea
l
ti
m
e
T
E
T
R
A
In
te
gr
ati
on
of
re
al-
ti
m
e
tra
ns
mi
ssi
on
T
E
T
R
A
In
te
gr
ati
on
of
re
al-
ti
m
e
tra
ns
mi
ssi
on
In
te
gr
ati
on
of
re
al-
ti
m
e
tra
ns
mi
ssi
on
In
te
gr
ati
on
of
re
al-
ti
m
e
tra
ns
mi
ssi
on
In
te
gr
ati
on
of
re
al-
ti
m
e
tra
ns
mi
ssi
on
2.3 Technology Requirements on Train-to-ground Wireless Communications
High-speed mobility
Large bandwidth
Implementation
Advanced
System standardization
Extensibility
Compatibility
3 Technology Selection
3.1 Feasibility of TD-LTE
3.2 TD-LTE Selection
3.3 Project Implementation Process
3.1 Feasibility of TD-LTE
Combination of mobility and large bandwidth
Improvement of industrial chain
Main strain 4G technology in China and the world
Extensibility
Interoperability and interface standardization
3.2 TD-LTE Selection Process
Communication
Review
In 2010, experts exchanged opinions on 802.11WLAN, 802.16WiMAX,
RailView, TD-LTE, DVB-T, MESH and other technologies on wireless
telecommunications.
During October to November in 2010, the research on companies
developing wireless communication technologies was carried out.
Research
In March 2011, Zhengzhou Rail Transport Wireless Telecommunications
Expert Consultation was held.
3.3 Project Implementation Process
Frequency allocation
• In August 2011, the Department of Industry And Wireless Bureau of Zhengzhou Province approved Zhengzhou Metro Co., Ltd. to use the frequencies from 1795 MHz to 1805 MHz.
Solution selection
• From 2011 to 2012, the design institute determined detailed technical solutions.
Tender
• In 2012, tenders for commercial telecommunications equipment, train, and PIS equipment used in train and ground, as well as TD-LTE equipment were complete.
Installation and
commissioning
• In 2013, equipment for TD-LTE is installed in Metro line 1 in Zhengzhou.
4 System Solution
4.1 Station Scheme
4.2 Interval Scheme
4.3 Vehicle Scheme
4.4 Depot and Parking Solution
4.5 Implementation and Planning
Scheme
4.1 Station Scheme
RRU Secondary
Combiner
Secondary combiner
Signals cover only
station and rail line
areas.
Station Scheme
System Solutions
Core network
BBU
RRU
Secondary Combiner
Shared commercial leaky
cable
TAU
4.2 Interval Scheme
• Secondary Combiner to relay commercial wireless signals BBU+RRU
RRU Secondary
Combiner
4.3 Vehicle Scheme
TAU+TAU
TAU
Equipment cabinet in the cab
4.4 Depot and Parking Scheme
Engineering
RRU
Indoor
antenna
BBU
Depot room Depot-use garage Depot-use garage
4.5 Implementation and Planning Scheme
5 Goals and Achievements
5.1 Platform Construction
5.2 Service Bearing
5.3 Available Achievements and Future Research
5.1 Platform Construction
TD-
LTE
train-
to-
ground
transpo
rt
platfor
m
5.2 Service Bearing
TD-LTE
Monitored
image informat
ion ……
Overhead Contact line
system inspection
Passenger information collection
Wireless commissioni
ng information in vehicle CBTC
information
Vehicle detection informati
on
Vehicle-mounted FAS
Vehicle-mounted broadcast
Video informat
ion
5.3 Available Achievements and Future Research
Transmission channel for TD-LTE train-to-ground wireless telecommunications
Center
PIS
Center
Video
Surveill
ance
Center
FAS
Vehicle-
mounte
d FAS
Vehicle
PIS
Vehicle-
mounted
video
CBTC
Informa
tion
Vehicle
detectio
n
informa
tion
Vehicle-
mounte
d
TETRA
Passenger
information
collection
CBTC
informa
tion
Vehicle
mainten
ance
center
Center
TETRA
Technol
ogy
detectio
n
systems
in
branche
s
………
………
Core
netwo
rk of
operat
or
User
equipment
6 Application Value
Promotion
6 Application Value Promotion
Comply with national requirements for strategic development of the technology, such as the issue of 4G licenses and the "National Development and Reform Commission on the organization and implementation of the fourth-generation TD-LTE mobile communications industry specific notice" (Office of High-Tech Development and Reform [2013] No. 2330
Standardize the radio frequencies for rail transport
Standardize terminal equipment in integrated platform
Integrate rail transports and reduce construction costs
Simplify equipment and lines in rail line areas and reduce maintenance costs
The Promotion of the E LTE technology has large value and significance.
Thank You