Guangzhou, April 18, 2022 -- The average daily commute time in 14 Chinese cities exceeds 70 minutes, with spatial fragmentation, work-residence separation, and morning and evening peak traffic congestion, leading to rising commuting anxiety among office workers as regional integration advances, according to the 2021 Commuting Survey Report on Major cities in China. With metro as a typical example, urban rail transit has become the first choice for urban residents due to its characteristics of fast accessibility, convenient punctuality and high safety.
From morning to night, the subway welcomes the delivery, and the passenger flow is endless. Especially during the morning and evening rush hours, the departure gap control is accurate to count by seconds, which greatly improves people's commuting reliability. Behind this is the strong support of a complete set of stable operation and seamless business system. The high stability, high reliability, and high availability of the IT infrastructure platform that carries the whole set of business system are particularly important.
To consolidate the IT foundation of the integrated monitoring system to ensure the normal operation of the subway
For commuters, every minute during the morning and evening rush hours is precious and determines the final award for perfect attendance. Therefore, commuters praised the accuracy of the subway station to the level of seconds. However, behind the stable operation of metro is the support of dozens of business systems with the core of ISCS (Integrated Supervision and Control System), and the IT architecture platform bearing its operation does not allow any error.
The integrated monitoring system (ISCS) is to the subway what the brain is to the human. As a highly integrated automatic monitoring system, ISCS includes 6 integrated monitoring objects, including substation automation system, environment and equipment monitoring system, automatic fire alarm system, temperature sensing optical fiber detection system, screen door and flood prevention door. As well as automatic ticket sale and inspection system, access control system, broadcast system, closed-circuit television system, wireless communication system, passenger information display system, communication centralized alarm system, dispatch telephone and signal system, a total of 9 interconnected monitoring objects; By integrating the above major weak current systems, a unified monitoring and management platform is built to realize the centralized monitoring and management of major weak current equipment in the subway. It can be said that the eyes can see all the ways and the ears can hear all the ways, so as to realize the correlation monitoring of train operation and passenger flow statistical data, as well as the information sharing and coordination among related systems. Finally, it can help operation management personnel to monitor and manage the operation of the whole subway line conveniently, efficiently and in real time.
Dalian Metro comprehensive monitoring system (ISCS) includes central level comprehensive monitoring system (ISCS), software test platform, network management system, station level comprehensive monitoring system (ISCS), vehicle depot comprehensive monitoring system (ISCS), equipment maintenance management system and training management system, etc. The aim is to connect the scattered metro service systems into an organic whole, realize mutual information interchange and resource sharing, improve the coordination and cooperation ability, and improve the overall automation level of the whole subway line. Finally, the information high-speed channel is connected with the control center of the metro line network. The operation management of a single subway line will be incorporated into the city's subway operation management system.
Based on this, through the unified user interface of the integrated monitoring system (ISCS), operation management personnel can control the operation of Dalian Metro line in real time, so as to respond to all kinds of emergencies in real time, improve the response speed, strain capacity and resilience, ensure the subway operation on time, improve the service quality, better serve passengers, and improve economic and social benefits.
According to statistics, the average daily passenger flow of 18 stations on a single line of Dalian Metro reaches millions of people. The loss caused by unplanned system outage is immeasurable. Therefore, the IT infrastructure carrying its integrated monitoring system (ISCS) must first have extremely high availability and reliability. Inspur K1 Power high-quality server has the highest RAS characteristics in the industry, provides high-value critical computing power, and escort core data. It is the preferred platform for core applications in finance, telecommunications, transportation and other industries, with availability up to 99.999%. A large number of practices have proved that it can provide stable and reliable hardware support. Stable operation for 8~10 years without stopping and restarting.
The K1 Power server adopts the highest standards in the industry from design, research and development, production, testing and other links to ensure that the system can run continuously and stably, and can resist the sudden accidents caused by vulcanization, high temperature, voltage fluctuations and other harsh physical environment; By means of redundancy, hot switching and fault self-detection, the system greatly reduces the risk of unplanned outage, realizes the high maintainability of the system, creates a high-performance and reliable platform for Dalian Metro, and greatly reduces the risk of outage and economic loss of its integrated monitoring system (ISCS).
The advantages of single-core multi-threading, high processor bandwidth, and oversized L3 cache make the K1 Power server of Tidal Wave very suitable for the transaction database processing of key information systems. IT provides Dalian Metro with IT infrastructure that can cope with high concurrency and high load requirements, and also supports the integrated deployment of multiple operating systems and multiple versions. Perfectly adapted to its existing CentOS operating system and NTU general GBase database, achieving the effect of "1+1>2", fully meeting the application requirements of 18 stations of a single line, but also for its future business expansion, opening more lines to consolidate the performance base and resource reserves.
Mobile payment refuses to wait in line to upgrade the subway experience
In the era of mobile Internet, with the rapid development of AFC: Automatic Fare Collection and the rise of new forms of payment, metro companies keep pace with The Times and actively develop Internet ticketing system and system based on clearing center (ACC: AFC Clearing Center's diversified payment system supports two-dimensional code, NFC(including UnionPay flash PAY card, mobile pay, smart wearable devices such as smart bracelet, smart watch, etc.), biometric identification (such as face, palm print, iris, etc.) and other payment methods.
In the framework of automatic ticket selling and checking system (AFC), the clearance center system (ACC) can handle the ticket clearing and clearing business by connecting to the automatic ticket selling and checking system (AFC) of each subway line, and it also needs to connect to the external third-party card issuing system and third-party payment system to manage the special ticket of subway. It is of self-evident importance to handle the business of issuing codes, checking accounts, settling and so on for diversified tickets of external systems (all-in-one card, IC card, two-dimensional code, face recognition, voice, etc.), which not only relates to the revenue of metro companies, but also directly affects the travel experience of passengers.
At present, two-dimensional code payment, as an Internet ticket widely used in subway traffic, effectively solves the problems existing in the ticket sale and inspection system, such as low ticket purchase rate, long queuing time for tickets in rush hours, and high single use cost of tickets. Passengers only need to rely on the two-dimensional code generated by the smartphone mobile APP to "swipe through the gate and enter the station". It is very friendly to local residents and foreign tourists and highly respected.
In order to further enhance convenient travel experience, Luoyang Metro chooses Inspur K1 Power server to carry its ACC and QR code system database, and adopts master-slave replication architecture. The two groups of databases are registered user information storage database and QR code payment database respectively.
The rack-built architecture and a large number of unique fault-tolerant and error-correcting technologies adopted by Inspur K1 Power server comprehensively improve the overall reliability of the system from the hardware system architecture and technology level, and avoid the reliability and availability problems caused by the failure or error of the processor, memory, components and the underlying system architecture.
After the launch of the two-dimensional code management system of Luoyang Metro, the functions of mobile APP access management, two-dimensional code business parameter management, raw code authorization and account checking and settlement have been improved. No matter passengers use the two-dimensional code of the APP to enter and exit the station or scan the code to pay for tickets, the operation of ticket purchase is simplified, the time of ticket purchase is saved, and the queuing phenomenon is alleviated. It has also greatly reduced the use and loss of one-way tickets. Moreover, since Internet cloud payment technology makes online payment through third-party payment channels (wechat, Alipay, UnionPay, etc.), no cash is generated during the whole transaction process, which greatly reduces the workload of cash settlement and collection at the station. Inspur K1 Power supports the integrated deployment of multiple operating systems and multiple versions, and fully supports a variety of mainstream commercial databases, domestic databases and open source databases in the industry. In view of the core business system requirements of Luoyang Metro, Inspur K1 Power server has advantages such as high master frequency, single core and multiple concurrent threads, large L3 cache, high memory I/O, high bus I/O, and the underlying structure has been comprehensively optimized. When running Luoyang Metro CentOS operating system and MySQL database, The performance advantage is significantly higher than that of 2-channel or 4-channel X86 servers. The measured data show that after the system is deployed online, the resource utilization rate is greatly improved, and the database performance TPS is as high as 80 ~ 90 thousand, far exceeding the expected performance, leaving sufficient performance reserve for opening more lines in the future.
In addition, Inspur K1 Power server is built with high capacity and fast SSD/NVMe disk. Customers do not need to purchase external devices such as optical fiber storage and switches, which reduces the procurement cost for customers, saves space and power costs, and effectively reduces the complexity of operation and maintenance. Inspur K1 Power server has a large number of installation practices in finance, telecommunications and other industries. It is mature and reliable, easy to operate and easy to install and configuration, and transparent in application, which helps Luoyang Metro obtain higher overall performance.
At present, with the arrival of the era of mobile Internet and big data, the IT infrastructure supporting the subway has gradually evolved from the traditional architecture to the cloud data center. Various mobile terminals' business interfaces have also greatly promoted the booming development of Internet payment and data analysis businesses, providing more convenience for people to travel easily. Inspur K1 Power server with "three high and one strong" features of high performance, high reliability, high security and strong data consistency and its cloud solutions with rich application scenarios will help urban rail transit accelerate into the era of smart travel.
