CN109249964A - Clock synchronization system based on dispatching centralized system - Google Patents
Clock synchronization system based on dispatching centralized system Download PDFInfo
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- CN109249964A CN109249964A CN201811072195.5A CN201811072195A CN109249964A CN 109249964 A CN109249964 A CN 109249964A CN 201811072195 A CN201811072195 A CN 201811072195A CN 109249964 A CN109249964 A CN 109249964A
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- 238000012544 monitoring process Methods 0.000 abstract 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Electric Clocks (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The embodiment of the application discloses a clock synchronization system based on a dispatching centralized system, which comprises: the satellite time service device comprises a satellite time service instrument, a central clock server and an external clock server; the satellite time service instrument is used for providing synchronous time information for the dispatching centralized system; the central clock server is used for acquiring the synchronous time information provided by the satellite time service instrument and providing the synchronous time information to an application server, an interface server, a communication server, the external clock server and a primary workstation in the dispatching centralized system; the communication server is used as a station equipment clock server and provides synchronous time information for the administered station equipment; the external clock server is used for providing the synchronous time information provided by the central clock server to the signal centralized monitoring system in the pipe and other systems, so that clock synchronization between the dispatching centralized system and other systems is realized.
Description
Technical Field
The application relates to the technical field of station control systems, in particular to a clock synchronization system based on a dispatching centralized system.
Background
CTC: centralized Traffic Control, a dispatch Centralized system. The dispatching centralized system is a remote control and remote signaling system formed by combining the telemechanical technology and railway transportation.
The dispatching centralized system is constructed on the basis of a train dispatching command system and consists of a railway bureau and a station. The dispatching centralized system not only realizes all functions of a train dispatching command system, but also realizes the functions of train marshalling information management, shunting operation management, comprehensive maintenance management, manual and planned automatic selection and arrangement of train/shunting routes, decentralized autonomous control and the like.
In the dispatching centralized system, a plurality of stations which are connected with each other are integrated with interlocking, signal and blocking equipment of a section, and a dispatcher can uniformly know and control the stations indoors. On the control console in the dispatching room, there are display devices (for example, luminous lines and display lamps) for simulating the states of each station and each section on the site, and by these display devices, the dispatcher can see at a glance whether each section and each station of the section and each station are occupied, the position of a switch, and the state of a traffic signal (for example, what color is displayed). If necessary, the dispatcher can control the equipment state of any station and open the route through related buttons. The dispatching centralized equipment improves the passing capacity of the sections and the hubs, improves the running speed of the train, improves the management of the train, improves the punctuation rate of the train running, improves the labor productivity and ensures that the train runs more safely.
In the existing CTC technical scheme, time synchronization inside a CTC system is realized, the system time of the maintenance terminal is manually checked, and other equipment performs time checking with the maintenance terminal through a proprietary protocol, so that the CTC system has a complex structure, needs manual operation and has time errors. In the existing CTC technical scheme, time synchronization between a CTC system and an external system is realized, an interface of a car service terminal or an interface of an autonomous machine is conventionally adopted, and a special protocol is adopted to realize time synchronization of a controlled external system.
Disclosure of Invention
The technical scheme is based on a multi-level synchronization mechanism of an NTP protocol or an application layer special protocol, and solves the problems of inaccurate time synchronization and irregular time synchronization interface.
In order to achieve the above object, an embodiment of the present application provides a clock synchronization system based on a dispatch centralizing system, including: the satellite time service device comprises a satellite time service instrument, a central clock server and an external clock server; wherein,
the satellite time service instrument is used for providing synchronous time information for the dispatching centralized system;
the central clock server is used for acquiring the synchronous time information provided by the satellite time service instrument and providing the synchronous time information to an application server, an interface server, a communication server, the external clock server and a primary workstation in the dispatching centralized system; the communication server is used as a station equipment clock server and provides synchronous time information for the administered station equipment;
the external clock server is used for providing the synchronous time information provided by the central clock server to the signal centralized monitoring system in the pipe, so that the clock synchronization of the dispatching centralized system and the signal centralized monitoring system in the pipe is realized.
Preferably, the application server, the interface server, the communication server and the external clock server adopt a dual-computer redundancy design, and all information on the host computer of the server and all information of the standby computer of the server are kept synchronous.
Preferably, the external clock server is connected with the central clock server by RS422/RS 232.
Preferably, the external clock server uses NTP protocol or application layer dedicated protocol to provide the synchronization time information provided by the central clock server to the in-pipe signal centralized monitoring system for time synchronization.
Preferably, the interface server includes an RBC interface server and a TSRS interface server; the RBC interface server provides the synchronous time information to the RBC system through an NTP protocol or an application layer special protocol, and the TSRS interface server provides the synchronous time information to the TSRS system through the NTP protocol or the application layer special protocol.
Preferably, the primary workstation comprises a dispatching desk terminal and a system maintenance terminal.
Preferably, the station equipment includes: a station terminal and a CTC autonomous machine; wherein, station terminal includes: a car service terminal and a signaler terminal.
Preferably, the central clock server provides the synchronous time information to the application server, the interface server, the communication server, the external clock server and the primary workstation in the dispatch centralized system by using an NTP protocol or an application layer dedicated protocol.
And the alarm device is used for triggering alarm when the clock synchronization of the dispatching centralized system fails.
The technical scheme has the following beneficial effects:
the technical scheme realizes the time synchronization of the CTC system based on the multi-level synchronization mechanism of the NTP protocol or the application layer special protocol, and improves the reliability of the time synchronization. And the external time providing server and external systems such as the signal centralized monitoring system in the pipe realize clock synchronization, so that a unified time synchronization interface can be standardized, and the standardization of time synchronization is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a clock synchronization system implementation diagram based on a dispatch centralized system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of a clock synchronization system based on a dispatch centering system;
FIG. 3 is a schematic diagram of a second embodiment of a clock synchronization system based on a dispatch set system;
fig. 4 is a schematic diagram of a third embodiment of a clock synchronization system based on a dispatch set system.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application shall fall within the scope of protection of the present application.
Fig. 1 is a diagram illustrating a clock synchronization system based on a dispatch center system according to an embodiment of the present invention. The method comprises the following steps: the satellite time service device comprises a satellite time service instrument, a central clock server and an external clock server; wherein,
and the satellite time service instrument is used for providing synchronous time information for the dispatching centralized system.
In this embodiment, the satellite time service instrument is a dual redundant set of GPS time service rubidium atomic clock, and provides standard beijing time to the CTC system.
The central clock server is used for acquiring the synchronous time information provided by the satellite time service instrument and providing the synchronous time information to an application server, an interface server, a communication server, the external clock server and a primary workstation in the dispatching centralized system.
In fig. 1, "central clock server" and "application server" are respectively labeled, and in practice, the functions of the central clock server and the functions of the application server may be executed on the same server.
In this embodiment, the central clock server directly performs clock synchronization with the satellite time service instrument, and is a primary clock source of the entire dispatch centralized system. The central clock server directly provides clock synchronization information for all the application servers, the interface servers, the communication servers, the primary workstations, the external clock servers and other equipment of the dispatching centralized system center through an NTP protocol or an application layer special protocol.
In this embodiment, the communication server is responsible for base layer network station communication, and serves as a station equipment clock server to provide clock synchronization information to the administered station equipment through the NTP protocol or the application layer dedicated protocol.
Further, the external clock server in this embodiment is connected to the central clock server by RS422/RS232, and provides clock synchronization information to other external systems such as the signal centralized monitoring system in the pipe through the NTP protocol or the application layer dedicated protocol.
In this embodiment, when the clock synchronization of the dispatch centralized system fails, an alarm system is triggered to give an alarm.
As shown in fig. 1, in this embodiment, the primary workstation mainly includes a dispatching desk terminal and a system maintenance terminal. The station equipment includes: and the terminal of the vehicle station such as the vehicle affair terminal/the signal operator terminal and the CTC autonomous machine. The interface server comprises an RBC interface server and a TSRS interface server; the RBC interface server provides the synchronous time information to the RBC system through an NTP protocol or an application layer special protocol, and the TSRS interface server provides the synchronous time information to the TSRS system through the NTP protocol or the application layer special protocol. And the communication server of the station is a communication front-end processor.
In another embodiment of the present technical solution, the application server, the interface server, the communication server, and the external clock server adopt a dual-computer redundancy design, and all information on the host computer of the server and all information of the standby computer of the server are kept synchronous. When the host computer is in failure, the standby computer replaces the host computer to continue working, and the normal work of the whole system is ensured.
Based on the above technical solution, taking the dispatch centralized system as an example of a railway head office TDCS/CTC central system, as shown in fig. 2. The method comprises the steps that a double set of redundant satellite time service instruments are arranged in a central system of a railway head office TDCS/CTC, the satellite time service instruments provide synchronous time information for the central system of the railway head office TDCS/CTC, a central clock server obtains the synchronous time information provided by the satellite time service instruments, and the synchronous time information is provided for an application server, an interface server, an external clock server and a primary workstation in the central system of the railway head office TDCS/CTC. In this embodiment, the external clock server is connected to the central clock server by using RS422/RS232, and provides clock synchronization information to other external systems such as the signal centralized monitoring system through the NTP protocol or the application layer dedicated protocol.
In fig. 2, "central clock server" and "application server" are respectively labeled, and in practice, the functions of the central clock server and the functions of the application server may be executed on the same server. The primary workstation mainly comprises a dispatching desk terminal and a system maintenance terminal.
Taking the dispatch centralized system as a central system of the railroad bureau customer-specific CTC as an example, as shown in fig. 3. And a double set of redundant satellite time service instrument is arranged in the railway bureau special passenger CTC central system, and the satellite time service instrument transmits clock synchronization information to a central server of the railway bureau special passenger CTC central system through an NTP protocol. And a central clock server of the railway bureau special passenger CTC central system also provides clock synchronization information for all equipment such as an application server, an interface server, a communication server, a primary workstation, an external clock server and the like of the CTC central system through an NTP protocol.
In fig. 3, "central clock server" and "application server" are respectively labeled, and in practice, the functions of the central clock server and the functions of the application server may be executed on the same server. The primary workstation mainly comprises a dispatching desk terminal and a system maintenance terminal. The interface server is an RBC interface server and a TSRS interface server. The technical scheme provides clock information to an RBC system through an RBC interface server by utilizing an NTP protocol or an application layer special protocol, and provides clock information to TSRS equipment through a TSRS interface server by utilizing the NTP protocol or the application layer special protocol. In the technical scheme, the communication server provides communication service for the CTC station system, and the CTC station system and the CTC center system are synchronized in time. In the jurisdiction area, the station equipment is a vehicle terminal such as a vehicle affair terminal/a signaler terminal in a CTC station system and a CTC autonomous machine. The CTC autonomous machine is respectively connected with the computer interlocking system and the station train control center through a special protocol, and the CTC autonomous machine is used as station equipment to receive time synchronization information transmitted by the communication server. The embodiment provides clock synchronization information to the computer interlocking system through the CTC autonomous machine. If the TSRS line does not exist in the synchronization system, the embodiment also provides clock synchronization information to the station train control center through the CTC autonomous machine, and the station train control center controls the vehicles passing through the station system through the ZPW2000 track circuit under the action of the clock synchronization information. In fig. 3, if there is a TSRS line, the station train control center may obtain clock synchronization information through the TSRS device. In addition, in this embodiment, the external clock server is connected to the central clock server by using RS422/RS232, and provides clock synchronization information to other external systems such as the signal centralized monitoring system in the pipe through the NTP protocol or the application layer dedicated protocol.
Taking the dispatch centralized system as an example, it is an existing TDCS/CTC central system of the railway bureau, as shown in fig. 4. In fig. 4, "central clock server" and "application server" are respectively labeled, and in practice, the functions of the central clock server and the functions of the application server may be executed on the same server. The primary workstation mainly comprises a dispatching desk terminal and a system maintenance terminal. The existing TDCS/CTC central system of the railway bureau is provided with double sets of redundant satellite time service instruments, and the satellite time service instruments transmit clock synchronization information to a central server of the existing TDCS/CTC central system of the railway bureau through NTP protocol. The central clock server acquires the synchronous time information provided by the satellite time service instrument and provides the synchronous time information to an interface server, a communication server, an application server, an external clock server and a primary workstation in the existing TDCS/CTC central system of the railway bureau through the NTP protocol. The communication server is responsible for base layer network station communication and is used as a station equipment clock server for providing clock synchronization information for the managed station equipment through an NTP protocol or an application layer special protocol. The station equipment is a station terminal such as a vehicle affair terminal/a signaler terminal in the CTC station system and a CTC autonomous machine. The CTC autonomous machine is respectively connected with the computer interlocking system and the station train control center through a special protocol, and the CTC autonomous machine is used as station equipment to receive time synchronization information transmitted by the CTC station system. The embodiment provides clock synchronization information to the computer interlocking system through the CTC autonomous machine. Under the action of clock synchronization information, the station train control center controls the vehicles passing through the station system through the ZPW2000 track circuit.
In addition, the external clock server is connected with the central clock server by adopting RS422/RS232, and provides clock synchronization information for other external systems such as a signal centralized monitoring system in the pipe and the like through an NTP protocol. As can be seen from fig. 4, the TDCS station system cannot obtain clock information from the central server, and provides the clock information after the TDCS system is upgraded.
The clock synchronization scheme of the three signal ground equipment adopts two modes of a standard Network Time Protocol (NTP) or an application layer special protocol. Because NTP is highly accurate and versatile, it is recommended to be used in a network connection environment. The NTP may be implemented by a software module built in the operating system or third-party software. Under the condition that the NTP protocol is not supported, the reliability of clock synchronization is ensured by using an application layer special protocol.
Although the present application has been described in terms of embodiments, those of ordinary skill in the art will recognize that there are numerous variations and permutations of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and permutations without departing from the spirit of the application.
Claims (9)
1. A clock synchronization system based on a dispatch centering system, comprising: the satellite time service device comprises a satellite time service instrument, a central clock server and an external clock server; wherein,
the satellite time service instrument is used for providing synchronous time information for the dispatching centralized system;
the central clock server is used for acquiring the synchronous time information provided by the satellite time service instrument and providing the synchronous time information to an application server, an interface server, a communication server, the external clock server and a primary workstation in the dispatching centralized system; the communication server is used as a station equipment clock server and provides synchronous time information for the administered station equipment;
the external clock server is used for providing the synchronous time information provided by the central clock server to the signal centralized monitoring system in the pipe, so that the clock synchronization of the dispatching centralized system and the signal centralized monitoring system in the pipe is realized.
2. The clock synchronization system of claim 1, wherein the application server, the interface server, the communication server and the external clock server are designed to be redundant, and all information on the host of the server is synchronized with all information on the standby of the server.
3. The clock synchronization system of claim 1, wherein the external clock server is connected to the central clock server using RS422/RS 232.
4. The clock synchronization system of claim 1, wherein the external clock servers use NTP protocol or application layer specific protocol to provide synchronization time information provided by the central clock server to the in-pipe signal centralized monitoring system for time synchronization.
5. The clock synchronization system of claim 1, wherein the interface server comprises an RBC interface server and a TSRS interface server; the RBC interface server provides the synchronous time information to the RBC system through an NTP protocol or an application layer special protocol, and the TSRS interface server provides the synchronous time information to the TSRS system through the NTP protocol or the application layer special protocol.
6. The clock synchronization system of claim 1, wherein the primary workstation comprises a dispatcher station terminal and a system maintenance terminal.
7. The clock synchronization system of claim 1, wherein the station device comprises: a station terminal and a CTC autonomous machine; wherein, the station terminal includes: a car service terminal and a signaler terminal.
8. The clock synchronization system of claim 1, wherein the central clock server provides synchronization time information to an application server, an interface server, a communication server, the external clock server, and a primary workstation in the dispatch hub system using NTP protocol or an application layer specific protocol.
9. The clock synchronization system of claim 1, further comprising: an alarm device;
and the alarm device is used for triggering alarm when the clock synchronization of the dispatching centralized system fails.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811072195.5A CN109249964A (en) | 2018-09-14 | 2018-09-14 | Clock synchronization system based on dispatching centralized system |
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| CN201811072195.5A CN109249964A (en) | 2018-09-14 | 2018-09-14 | Clock synchronization system based on dispatching centralized system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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