Huawei elte Solution Success Case for Zhengzhou Metro Project
Project Background Zhengzhou: a major city and transportation hub in the central region of China Six metro lines, and total length of 202.53 km constructed to improve traffic conditions and support the city's sustainable development 1
Metro Line 1: First Metro Line in Zhengzhou Project Overview Strategic Requirements 3 Phases: Phase I (2014), Phase II (2016), Phase III (2023) Phase I: 26.2KM, 1 control center, 20 stations, 26 trains, PIS and video surveillance services Phase II: 55 trains, train control services Phase III: 67 trains, command & dispatch services Passenger Oriented PIS: Travelling information such as route, station transfer, ticket price, and entertainment Information including news, TV program, and advertisement CCTV: real-time monitoring of carriage, driver s cab, and railway, and safe Future Oriented Leading technology in future 10~15 Years High Mobility: better performance in a speed of 200km/h in the future Easy Service Expansion: PIS, video surveillance, train control and trunking service in one network in the future 2
2 Choices Available to Zhengzhou Metro Group 3 Networks, and High Operation Costs One Networks for Multi-services CBTC Train Dispatching PIS, CCTV WiFi: Free & open frequencies, and more interference source No QoS guarantee mechanism No ways to guarantee better service performance in high mobility More sites, and difficult maintenance in tunnel TETRA: Only voice, and no data& video dispatching Easy Service Expansion: PIS, video surveillance, train control and trunking service in one network in the future High Bandwidth: now minimum DL 6Mbps and UL 6Mbps for one train, UL 48Mbps in the future High Mobility: Better performance in 200KM/H High Performance: multi-level QoS to guarantee smooth video broadcast 3
Huawei s Innovation Progress Together with Zhengzhou Rail Transport Company Starting Point Discussion about PIS and Ground-to-Train communication solution Acquired 1.8Ghz Frequency Applied for frequency band (1795M- 1805M) for Ground-to-Train wireless communication Signed Cooperation Agreement Signed innovation agreement of Ground-to-Train communication solution by two parties 2010.9 2011.3 2011.5 2011.6 2011.11 2013.11 Passed Technical Innovation Demonstration Huawei LTE metro Ground-to-Train communication solution was adopted Innovation Approval Project innovation approved by Huawei, and coming into implementation phase Project Launch Joint commercial launch 4
Innovative elte Solution for Zhengzhou Metro Center Server PIS System Dispatcher OMC Voice & Video Severs ecns600 IP Network Station Station Station LCD Switch LCD Switch LCD Switch LTE BBU LTE BBU LTE BBU Track &Train TAU LTE RRU TAU LTE RRU LTE RRU Leaky Coaxial Cable or Antenna 5
elte Engineering for Zhengzhou Metro Leaky Cable elte for Depot and Parking Coverage RRU Secondary Combiner BBU+RRU Inside Tunnel BBU Equipment Cabinet in the Cab Customized TAU Indoor Antenna RRU 6
Effective Anti-interference Technologies to Improve Onboard Service Experiences & Driving Safety User Data User Data Scheduling in a 20M bandwidth, inaccurate channel quality report No special advanced technologies reduce interference Scheduling based on 15k sub-carriers, accurate channel quality report Advanced technologies (ICIC, IRC) to reduce interference 7
High Mobility, Seamless Handover to Ensure Service Continuity WiFi: 80 km/h LTE: 200km/h 2 devices separately to access 2 networks 2 network for overlapped coverage Core Network X2 Interface Previous Cell Adjacent Cell 4 vehicle-mounted devices in connected state, another in the cell center to ensure service continuity when one in cell reselection 1~2S service interruption if more interferences in handover area Seamless handover, no data loss, and handover delay < 50ms Designing speed: 200km/h, not behind other technologies in future 10-15 years 8
Multi-level QoS to Ensure Reliable Transmission of Key Data Service WiFi:Contention based QoS algorithms LTE:9-level QoS algorithms Bandwidth allocation based on service requirements WiFi No user priority CBTC PIS CCTV Trunking Voice Guarantee service QoS of the highest priority in congestion,for example, CBTC Level1 Level 2 Level 3 Level 4 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 CBTC Latency:100ms Tunking Packet loss:10-6 Latency:100ms PIS Packet loss:10-2 Latency:300ms Packet loss:10-6 CCTV Latency:150ms Packet loss:10-3 9
Larger Coverage and Easy Operation & Maintenance RRU RRU RRU Average 1.325KM Leaky Coaxial Cable Distance between stations : maximum 2.35KM, minimum 944M, and average 1.325 KM Reusing the existing commercial leaky cable, and low network deployment cost 10
PIS over LTE:Real-time News, Transferring Info, Online Advertisement, and Convenient Travelling Life Real-time News Transfer Info Online Advertisement EPC PIS System Transmission High bandwidth, low latency, and better performance to match PIS service requirements Real-time news, transfer info, and online advertisement to improve travelling convenience, and increase metro customer revenues 11
CCTV over LTE: Real-time Know & Control Onsite Emergency Dispatching Center DL 100Mbps,UL 50Mbps LTE Latency <50ms Station Rail Carriage High bandwidth, low latency to support HD video, and comprehensive surveillance of station, carriage, and rail, and quickly know and know onsite emergency 12
Easy Service Expansion to Support Train Dispatch & CTBC in The Future PIS System Video Severs TV Wall Dispatcher PIS System Voice & Video Severs TV Wall EPC EPC RAN RAN CCTV PIS CCTV PIS Train Dispatching CBTC 13
World s 1 st LTE Based Urban Rail Transport Wireless Communication Solution for Zhengzhou Metro Huawei elte Urban Rail Transport Wireless Communication Solution Commercially Launched in Zhengzhou On Nov. 29, 2013 14
Benefit from Huawei elte Urban Rail Transport Solution elte Safe Operation Specialized anti-interference technologies Multi-level QoS algorithms High mobility, large coverage, and seamless handover Agile Dispatching Visualized dispatching to ensure real scene visible, command directing up to group members CCTV over LTE to know & control onsite emergency Convenient Travelling PIS over LTE to support real-time passenger information, and news broadcast 15
Highly Valued by Zhengzhou Rail Transport Company The successful application of LTE technology in Zhengzhou Metro brings innovative breakthrough in improving metro operation efficiency and passenger s travelling experiences. Compared to other technologies, the LTE technology has significant advantages in network capacity, coverage, anti-interference, and high mobility, which will further strengthen our confidence in using Xia Jinghui, CTO, Zhengzhou Rail Transport Company Huawei elte solution for later metro lines. - Xia Jinghui, CTO, Zhengzhou Rail Transport Company 16
Highly Valued by Zhengzhou Rail Transport Company Zhengzhou Metro is the world s 1 st line adopting LTE technology, which is a very important milestone. The successful application proves that LTE technology can entirely satisfy the requirements of metro operation, and it will also set an example and reference for later LTE wireless broadband applications in metro. I believe that LTE technology will be sure to extensively used for metro industry Liu Hongtai, Vice-general Manager, Operation Department, Zhengzhou Rail Transport Company - Liu Hongtai, Vice-general Manager, Operation Department, Zhengzhou Rail Transport Company 17
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