Transcript PowerPoint 演示文稿 - Huawei Enterprise

Innovation & Convergence: Changing the Future of Metro Wireless Communication
Existing Situation of Urban Rail Transport Wireless Communication
Metro Applications
PIS, CCTV
Train Dispatching
CTBC
Broadband Data Technology
NarrowBand Trunking Technology
Broadband Data Technology
• Real-time data transmission of
• Voice, short data
• PIS
• CCTV
CBTC
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Challenges Faced by Urban Rail Transport Wireless Communication
Service Requirements of
Urban Rail Transport
Current Challenges
1.Free and open frequencies, and more
interference sources
2.No QoS guarantee mechanism
CBTC: Bidirectional real- Train Dispatching
time transmission of train
control information
3.More sites, and difficult maintenance in tunnel
4.3 Independent networks, and high operation
costs
5.Only voice, and no data and video dispatching
6.No ways to guarantee better service
Video transfer in
the train and
along the railway
PIS: Real-time
broadcast of video,
information, and
disaster emergency
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performance during high mobility
Huawei’s Innovation Progress Together with Zhengzhou Rail
Transport Company
Staring Point
Acquired 1.8Ghz Frequency
Signed Cooperation Agreement
Discussion about PIS and
Applied for frequency band (1795M-
Signed innovation agreement of
Ground-to-Train
1805M) for Ground-to-Train wireless
Ground-to-Train communication solution
communication solution
communication
by two parties
2010.9
2011.3
2011.5
2011.6
2011.11
2013.11
Passed Technical Innovation
Innovation Approval
Project Launch
Demonstration
Project innovation approved
Joint commercial launch
Huawei LTE metro Ground-to-Train
by Huawei, and coming into
communication solution was adopted
implementation phase
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Huawei eLTE Urban Rail Transport Solution: Innovation &
Convergence; Changing the Future of Metro Wireless
Communication
Safe Operation
Innovation
• Mainstream technology, First global launch.
• Advanced interference prevention technologies in
air interface
• Multi-level QoS algorithms
• High mobility, and seamless handover algorithms
Change
Convergence
• One network to carry PIS, CCTV, broadband
trunking, and CBTC simultaneously
• Broadband trunking to support simultaneous voice
and video dispatching
• Convergence of broadband trunking and video
conferencing
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• Specialized interference prevention technologies
• Multi-level QoS algorithms
• High mobility, large coverage, and seamless
handover
Agile Dispatching
• Visualized dispatching to ensure real-time incident
viewing, command direction to group members
• Convergence of broadband trunking and video
conferencing wtih fast decision-making
Convenient Traveling
• PIS over LTE to support real-time passenger
information, and news broadcasts
• CCTV over LTE to view and control on-site
emergencies
• Telepresence over LTE: telepresence and video
conferencing convergence
Effective Interference Prevention Technologies to Improve Onboard
Service Experiences and Driving Safety
Safe Operation
Better LTE channel structure than Wi-Fi
•
LTE: Scheduling based 15k sub-carriers,
and 20 Mhz networking
•
bandwidth，20*7=140M networking
Convenient Traveling
Systematic anti-interference
technologies to achieve 20dB+
gain V.S Wi-Fi
LTE
strength < -90 dbm
Wi-Fi: Scheduling based 20M
Physical Fast power control
layer
Interleaving
< -130 dbm
Wi-Fi
Wi-Fi
Pilot detection
LTE: data reception if signal strength
No
MIMO
150Mbits/s
Link
Layer
100
50
0
LTE
-60
-65
-70
-75
-80
-85
-90
-95
-100
-105
-110
-115
-120
-125
-130
•
Better LTE reception performance
than Wi-Fi
• Wi-Fi: no data reception if signal
Agile Dispatch
dBM
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HARQ retransmission
Slow power control
No
AMC
Network ICIC
Layer
CoMP
Open loop
power
control
High Mobility, Seamless Handover to Ensure Service Continuity
Safe Operation
Wi-Fi: 80 km/h
Agile Dispatch
Convenient Traveling
LTE: 200 km/h
Core Network
2 devices
separately access
2 networks
2 networks for
overlapping
coverage
Previous Cell
• 4 connected vehicle-mounted devices, another in the
cell center to ensure service continuity when rrequires
reselection
• 1s to 2s service interruption if more interferences are
experienced in handover area
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X2 Interface
Adjacent Cell
• Seamless handover, no data loss, and handover delay
< 50 ms
• Design speed: 200 km/h, ahead of other technologies
in the next10 to 15 years.
Multi-level QoS to Ensure Reliable Transmission of Key Data Services
Safe Operation
WiFi：Contention based QoS algorithms
Agile Dispatch
Convenient Traveling
LTE: 9-level QoS algorithms
• Bandwidth allocation based on service requirements
WiFi
No user priority
CBTC
PIS, CCTV
Trunking Voice
• Guaranteed service QoS to the highest priority
during congestion, for example, CBTC
Level 1
• Users accessing to network by free contention, and no
absolute user priority
• About 60% packet loss rate in intra-frequency interference
• 100% packet loss rate if 2 interference sources, and not
meeting metro service requirements
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Level 2
Level 3
Level 4
CBTC
• Latency: 100 ms
• Packet loss: 10-6
Tunking
• Latency: 100 ms
• Packet loss: 10-2
PIS
• Latency: 300 ms
• Packet loss: 10-6
CCTV
• Latency: 150ms
• Packet loss: 10-3
Voice, Video, and Data All-in-one to Greatly Improve Dispatching
Efficiency
Safe Operation
Agile Dispatch
Convenient Traveling
Dispatching Center
Voice
Video
Data
Location Info
Onsite Scenes
User 2
User 1
Mobile Office
User 3
• With massive amount of data, convergence of eLTE voice, data, and video enrich
dispatching services and improve dispatching efficiency
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Professional Trunking performance to Ensure Agile Dispatching
Safe Operation
Agile Dispatch
Group Call Setup: 300 ms
Pre-emptive call: 150 ms
Group Members: +∞
Real-time backup, and fault protection
LTE
Group 1
Group 2
10
Group 3
Convenient Traveling
PIS over LTE: Real-time News, Information Transfer, Online
Advertisements, and Convenient Travel
Safe Operation
Real-time News
Agile Dispatch
Convenient Traveling
Information Transfer Online Advertisement
EPC
PIS System
Transmission
•
High bandwidth, low latency, and better performance to match PIS service requirements
•
Real-time news, information transfer, and online advertisements to improve travelling convenience,
and increase metro customer revenues
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CCTV over LTE: Real-time View and Control of On-site Emergencies
Safe Operation
Agile Dispatch
Convenient Traveling
Dispatching Center
DL 100 Mbits/s, UL 50 Mbits/s
Rail
Station
•
LTE
Latency < 50 ms
Carriage
High bandwidth, low latency to support HD video, and comprehensive surveillance of station, carriage,
and rail, and quickly view and control on-site emergencies
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Telepresence over LTE: Quick Decision-making, and improved
Agile Dispatch
Dispatching efficiency
Safe Operation
Convenient Traveling
Video Conferencing Room in Dispatching Center
LTE
Video
Station Dispatching Center
Onsite Staff
•
ECV
Convergence of eLTE and telepresence enable visualization, quick decision-making, and
improve dispatching efficiency
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Innovative eLTE Solution for Zhengzhou Metro
Center Server
Voice & Video Servers
PIS System
Dispatcher
OMC
eCNS600
IP Network
Station
Station
LCD
Station
LCD
Switch
LTE BBU
Track & Train
LCD
Switch
Switch
LTE BBU
LTE BBU
LTE RRU
LTE RRU
Leaky Coaxial Cable or Antenna
TAU
TAU
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LTE RRU
Comprehensive Cooperation with Rail Transport Partners
CBTC
•
PIS
IOT with CASCO, better performance
IOT with Neusoft, Shanghai
•
•
IOT with INSIGMA, full adapatation
Dispatcher for rail transport
industry
Zhizhen, better performance
than WLAN
•
•
Customized Rail Auxiliaries
Customized rail industry devices
including cab radio and handset
verification in moving train
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Close Cooperation with Partners to Help Customers Succeed
Help Customers Succeed
Industry Partners
Partners (100+)
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Consulting & Desig Partners
Innovation and Convergence: Changing the Future of Metro
Wireless Communication
Innovation and Convergence
Safe Operation, Agile Dispatch, and
Convenient Travel
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HUAWEI ENTERPRISE ICT SOLUTIONS A BETTER WAY
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