CN108616580B - Distributed system based on ICE message middleware and data transmission method thereof - Google Patents
Distributed system based on ICE message middleware and data transmission method thereof Download PDFInfo
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- CN108616580B CN108616580B CN201810318600.0A CN201810318600A CN108616580B CN 108616580 B CN108616580 B CN 108616580B CN 201810318600 A CN201810318600 A CN 201810318600A CN 108616580 B CN108616580 B CN 108616580B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H—ELECTRICITY
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Abstract
The invention relates to the technical field of rail transit information, and particularly discloses a distributed system based on an ICE message middleware, which comprises a central server, a central switch, at least one slave station server and at least one slave station switch, wherein the central server is connected with the slave station switch through a network; the central server is in communication connection with the central switch, and the slave station server is in communication connection with at least one slave station switch; the central switch is in distributed communication with each of the slave switches. The invention also discloses a data transmission method of the distributed system based on the ICE message middleware, which comprises the following steps: s1, collecting equipment parameters; s2, defining the parameter type of the ICE interface; s3, serializing the equipment parameters; s4, calling an ICE interface to transmit data; and S5, decoding the data and performing service processing. The invention solves the problems of disordered management of the rail transit control system, unclear system data distribution and easy error of a communication mode.
Description
Technical Field
The invention relates to the technical field of rail transit information, in particular to a distributed system based on an ICE message middleware and a data transmission method thereof.
Background
Distributed systems (distributed systems) are software systems built on top of a network. It is the nature of software that the distributed system is highly cohesive and transparent. Thus, the distinction between a network and a distributed system is more in the high-level software (specifically the operating system) than in the hardware. Cohesiveness means that each database distribution node is highly autonomous and has a local database management system. Transparency means that each database distribution node is transparent to the user's application, not seen locally or remotely. In a distributed database system, a user does not feel that data is distributed, i.e., the user does not have to know whether a relationship is split, whether there is a copy, where data is stored, and on which site a transaction is executed, etc. Based on the characteristics of multiple devices, multiple control signals, long control lines, complex control environment and the like in a rail transit station, aiming at the problems of complex development, troublesome debugging, complex CORBA architecture, low efficiency and the like of OMGCORBA specification, a rail transit control center, stations and vehicle sections need to adopt a distributed system as a control and management system, but the problems of disordered data management, unclear data distribution and complex communication mode can also occur in the distributed system applied to rail transit. If the defects are not overcome, the problems of disordered rail traffic management and low efficiency can occur, and traffic accidents can be caused.
Disclosure of Invention
In view of the above, there is a need to provide a distributed system based on ICE message middleware and a data transmission method thereof to solve the above-mentioned disadvantages in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ICE message middleware based distributed system comprising: a central server, a central switch, at least one slave server and at least one slave switch;
the central server is in communication connection with the central switch, and the slave station server is in communication connection with at least one slave station switch; the central switch is in distributed communication connection with each slave station switch;
the central server is used for being connected with at least one slave station server and receiving and processing the equipment data of each slave station server;
the central switch is used for connecting the central server and the slave station switches and building the central server and the slave station servers into a local area network;
the slave station server is used for acquiring equipment parameters of electromechanical equipment systems in rail transit stations, rail transit vehicle sections and/or rail transit parking lots, then performing serialization processing, encoding data, converting the data to be transmitted into byte arrays, and transmitting the byte arrays to the central server through an ICE message middleware;
the slave station switch is used for connecting the central switch and the slave station server and building the central server and the slave station server into a local area network.
Further, the distributed system also comprises electromechanical equipment of the rail transit station and/or the rail transit vehicle section;
the rail transit station is provided with at least one slave station server;
the station electromechanical device is used as a device for serving passengers and crew service application at each rail transit station and/or rail transit vehicle section.
Furthermore, the central server is provided with a central control system based on ICE message middleware, and the central control system comprises a data receiving module, a parameter decoding module, a real-time communication response module and a communication connection control module;
the data receiving module is used for receiving the byte array subjected to serialization processing and coding by the slave station server;
the parameter decoding module is used for decoding the byte array received from the data receiving module into required equipment data;
the real-time communication response module is used for responding to a link test request of the slave station server and responding to data sent from the slave station server;
the communication connection control module is used for connecting the slave station server to receive the central server or performing disconnection reconnection;
the slave station server is provided with a slave station control system based on an ICE message middleware, and the slave station control system comprises a data acquisition module, a parameter serialization processing module, a data transmission module and a real-time communication request module;
the data acquisition module is used for acquiring equipment parameters of electromechanical equipment systems in each rail transit station, rail transit vehicle section and/or rail transit parking lot and storing the equipment parameters into a memory of the slave station server;
the parameter serialization processing module is used for carrying out serialization processing and coding on the equipment parameters in the slave station server memory so as to obtain a byte array;
the data transmission module is used for sending the byte array subjected to serialization processing and coding by the parameter serialization processing module to the central server through the ICE message middleware;
the real-time communication request module is used for carrying out network connection with the central server, periodically detecting the link state or carrying out disconnection reconnection.
A data transmission method of a distributed system based on ICE message middleware comprises the following steps:
s1, acquiring equipment parameters of the rail transit from the station server;
s2, slave station server defines parameter type of ICE interface of central server;
s3, serializing the acquired equipment parameters from the station server;
s4, the slave station server transfers data by calling an ICE interface;
and S5, the central server decodes the data sent by the slave station server through the ICE message middleware, thereby obtaining required parameters and carrying out service processing.
Further, in the process of executing S1-S5, the slave station server sends a link test request to the central server every several seconds, and the central server responds a message after receiving the link request; when the central server does not receive the link test response for a plurality of times continuously, the slave server reconnects; when the central server does not receive the message of the slave station server in a time range, the central server closes the connection with the slave station server.
Further, in S2, the parameter type of the ICE interface uses byte array.
Further, in S3, the slave server passes the byte array after being serialized and encoded as an input parameter to the ICE interface.
The invention has the beneficial effects that:
the variable byte arrays are defined in the operating parameters of the ICE interfaces for transmitting the parameters, so that the transmission of different types and different quantities of parameters is realized in the operation of the same ICE interface, the unified ICE interface operation is provided for different applications, the quantity and the complexity of the ICE interfaces are reduced, convenience is provided for increasing electromechanical equipment of rail transit stations and/or rail transit vehicle sections in the future, the adjustment of the conventional ICE data transmission interface is not needed, and the easy maintenance and the expansibility of the system are improved.
The invention adopts a distributed real-time data transmission mode, can realize the clustering of the server side through the characteristics of the ICE message middleware, and can transversely expand the client side, thereby improving the expansibility of the system.
The invention solves the problems of management confusion, unclear system data distribution and easy error of communication modes caused by a plurality of rail transit equipment, a plurality of control signals, long control lines and complex control environment through the distributed system based on the ICE message middleware and the data transmission method thereof for real-time data transmission.
Drawings
FIG. 1 is a schematic structural diagram of an ICE message middleware-based distributed system of the present invention;
FIG. 2 is a schematic diagram of the connection of the slave server of the present invention to the electromechanical device of rail transit;
FIG. 3 is a schematic structural diagram of the ICE message middleware-based central control system of the present invention;
FIG. 4 is a schematic structural diagram of a slave station control system based on ICE message middleware of the present invention;
FIG. 5 is a flowchart of the data transmission method of the distributed system based on ICE message middleware according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further clearly and completely described below with reference to the embodiments of the present invention. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like, are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
Examples
As shown in fig. 1, an ICE message middleware-based distributed system includes: a central server, a central switch, at least one slave server and at least one slave switch;
the central server is in communication connection with the central switch, and the slave station server is in communication connection with at least one slave station switch; the central switch is in distributed communication connection with each slave station switch;
the central server is used for being connected with at least one slave station server and receiving and processing the equipment data of each slave station server;
the central switch is used for connecting the central server and the slave station switches and building the central server and the slave station servers into a local area network;
the slave station server is used for acquiring equipment parameters of electromechanical equipment systems in rail transit stations, rail transit vehicle sections and/or rail transit parking lots, then performing serialization processing, encoding data, converting the data to be transmitted into byte arrays, and transmitting the byte arrays to the central server through an ICE message middleware; data of local electric power, a screen door, an automatic ticket selling and checking, an environmental control and other subsystems are collected in real time at each rail transit station, rail transit vehicle section or parking lot, and the data are transmitted to a central server for processing in real time through a unified ICE interface;
the slave station switch is used for connecting the central switch and the slave station server and building the central server and the slave station server into a local area network.
ICE (Internet Communications Engine) message middleware is object-oriented remote call (RPC) message middleware and provides better support for constructing object-oriented client-server (C/S) application. ICE supports multiple operating systems, multiple development languages. However, interface operations of the ICE do not support reloading, and operations in the same interface must have different names, no matter what type and number of parameters they have, which results in defining multiple interface operations for implementing an interface that requires the introduction of variable parameters, which is not conducive to upgrading the interface operations.
As shown in fig. 1 and 2, the distributed system further includes electromechanical devices of rail transit stations and/or rail transit vehicle sections (the electromechanical devices include power devices, elevator devices, screen door devices, ticket selling and checking devices, and the like);
the rail transit station is provided with at least one slave station server;
the station electromechanical device is used as a device for serving passengers and crew service application at each rail transit station and/or rail transit vehicle section.
As shown in fig. 3 and 4, the central server is installed with a central control system based on ICE message middleware, and the central control system comprises a data receiving module, a parameter decoding module, a real-time communication response module and a communication connection control module;
the data receiving module is used for receiving the byte array subjected to serialization processing and coding by the slave station server;
the parameter decoding module is used for decoding the byte array received from the data receiving module into required equipment data;
the real-time communication response module is used for responding to a link test request of the slave station server and responding to data sent from the slave station server;
the communication connection control module is used for connecting the slave station server to receive the central server or performing disconnection reconnection;
the slave station server is provided with a slave station control system based on an ICE message middleware, and the slave station control system comprises a data acquisition module, a parameter serialization processing module, a data transmission module and a real-time communication request module;
the data acquisition module is used for acquiring equipment parameters of electromechanical equipment systems in each rail transit station, rail transit vehicle section and/or rail transit parking lot and storing the equipment parameters into a memory of the slave station server;
the parameter serialization processing module is used for carrying out serialization processing and coding on the equipment parameters in the slave station server memory so as to obtain a byte array;
the data transmission module is used for sending the byte array subjected to serialization processing and coding by the parameter serialization processing module to the central server through the ICE message middleware;
the real-time communication request module is used for carrying out network connection with the central server, periodically detecting the link state or carrying out disconnection reconnection.
As shown in fig. 5, a data transmission method of a distributed system based on ICE message middleware includes the following steps:
s1, acquiring equipment parameters of the rail transit from the station server;
s2, slave station server defines parameter type of ICE interface of central server;
s3, serializing the acquired equipment parameters from the station server;
s4, the slave station server transfers data by calling an ICE interface;
s5, the central server decodes the data sent from the station server through the ICE message middleware, so as to obtain the needed parameters and perform service processing;
the distributed system is provided with a plurality of subsystems, the protocols of data provided by the subsystems or the types of the provided data are different, because the interface operation of the ICE does not support overloading, the ICE interface name under a namespace is unique, so that a plurality of interface operations need to be defined when the interface needing to be transmitted with variable parameters is realized, and the unification and the maintenance of the interface operations are not facilitated.
In the process of executing S1-S5, the slave station server sends a link test request to the central server every several seconds, and the central server responds a message after receiving the link request; when the central server does not receive the link test response for a plurality of times (preferably 3 times), the slave server reconnects; when the central server receives no message from the slave server within a time frame (preferably 15 seconds), the central server closes the connection with the slave server.
In S2, the parameter type of the ICE interface uses byte arrays.
In S3, the slave server passes the serialized and encoded byte array as an input parameter to the ICE interface.
Real-time data processing refers to the process of collecting and processing field data by a computer within the actual time of occurrence of the field data; in the process of real-time data processing, a real-time database firstly needs to provide high-speed data acquisition and data processing, and in order to adapt to different integrated systems, the real-time database needs to provide a high-precision storage format: the real data points are represented by double precision, the integer data points are represented by four-byte long integer, the time storage must be represented to one millisecond, and the time stamp is stored by Greenwich mean time to avoid the problems caused by time zones and daylight saving time.
The interface management means that state data of key equipment under the integrated/interconnected system is actively or passively collected from the corresponding integrated/interconnected system through different protocols and reported to the real-time monitoring layer for corresponding processing. The general principle is that a subsystem corresponds to a process, one type of function corresponds to a process, the same protocol is realized by the same process as much as possible, the multiplexing of modules is realized to the maximum extent, and unnecessary program development is reduced, so that the interface processing layer is appropriate in scale, clear in hierarchy, clear in function, easy to expand, and the multiplexing and maintainability of the system are improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. An ICE message middleware based distributed system, comprising: a central server, a central switch, at least one slave server and at least one slave switch;
the central server is in communication connection with the central switch, and the slave station server is in communication connection with at least one slave station switch; the central switch is in distributed communication connection with each slave station switch;
the central server is used for being connected with at least one slave station server and receiving and processing the equipment data of each slave station server;
the central switch is used for connecting the central server and the slave station switches and building the central server and the slave station servers into a local area network;
the slave station server is used for acquiring equipment parameters of electromechanical equipment systems in rail transit stations, rail transit vehicle sections and/or rail transit parking lots, and storing the equipment parameters into a memory of the slave station server; then, the device parameters in the memory of the slave station server are serialized, data are coded, the data to be sent are converted into a variable byte array, and the variable byte array is sent to the central server through an ICE message middleware;
the slave station switch is used for connecting the central switch and the slave station server and building the central server and the slave station server into a local area network.
2. The ICE message middleware-based distributed system of claim 1 further comprising rail transit stop and/or rail transit vehicle segment electromechanical devices;
the rail transit station is provided with at least one slave station server;
the station electromechanical device is used as a device for serving passengers and crew service application at each rail transit station and/or rail transit vehicle section.
3. The ICE messaging middleware based distributed system of claim 1, wherein the central server is installed with a central control system based on ICE messaging middleware, the central control system comprising a data receiving module, a parameter decoding module, a real-time communication response module and a communication connection control module;
the data receiving module is used for receiving the byte array subjected to serialization processing and coding by the slave station server;
the parameter decoding module is used for decoding the byte array received from the data receiving module into required equipment data;
the real-time communication response module is used for responding to a link test request of the slave station server and responding to data sent from the slave station server;
the communication connection control module is used for connecting the slave station server to receive the central server or performing disconnection reconnection;
the slave station server is provided with a slave station control system based on an ICE message middleware, and the slave station control system comprises a data acquisition module, a parameter serialization processing module, a data transmission module and a real-time communication request module;
the data acquisition module is used for acquiring equipment parameters of electromechanical equipment systems in each rail transit station, rail transit vehicle section and/or rail transit parking lot and storing the equipment parameters into a memory of the slave station server;
the parameter serialization processing module is used for carrying out serialization processing and coding on the equipment parameters in the slave station server memory so as to obtain a byte array;
the data transmission module is used for sending the byte array subjected to serialization processing and coding by the parameter serialization processing module to the central server through the ICE message middleware;
the real-time communication request module is used for carrying out network connection with the central server, periodically detecting the link state or carrying out disconnection reconnection.
4. A data transmission method of a distributed system based on ICE message middleware is characterized by comprising the following steps:
s1, acquiring equipment parameters of the rail transit from the station server;
s2, slave station server defines parameter type of ICE interface of central server;
s3, serializing the acquired equipment parameters from the station server;
s4, the slave station server transfers data by calling an ICE interface;
and S5, the central server decodes the data sent by the slave station server through the ICE message middleware, thereby obtaining required parameters and carrying out service processing.
5. The data transmission method of the ICE message middleware based distributed system as claimed in claim 4, wherein in the course of executing S1-S5, the slave station server sends a link test request to the central server every several seconds, and the central server makes a message response after receiving the link request; when the central server does not receive the link test response for a plurality of times continuously, the slave server reconnects; when the central server does not receive the message of the slave station server in a time range, the central server closes the connection with the slave station server.
6. The data transmission method for the ICE message middleware based distributed system as claimed in claim 4, wherein in S2, the parameter type of ICE interface uses byte array.
7. The data transmission method of the ICE message middleware based distributed system as claimed in claim 4, wherein in S3, the slave server passes the byte array after being processed by serialization and encoding as input parameters to the ICE interface.
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| CN112309162A (en) * | 2020-10-27 | 2021-02-02 | 蜂助手股份有限公司 | Method, device and system for processing in-road parking monitoring data |
| CN114715200B (en) * | 2021-01-04 | 2023-08-08 | 比亚迪股份有限公司 | Station communication network system |
| CN112527951B (en) * | 2021-02-09 | 2021-05-11 | 北京微步在线科技有限公司 | Storage method and device of integer data and storage medium |
| CN113485687B (en) * | 2021-07-27 | 2022-02-11 | 成都九洲电子信息系统股份有限公司 | Rapid building method and system based on ICE distributed cross-language application |
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| CN101414737A (en) * | 2007-10-19 | 2009-04-22 | 上海轨道交通设备发展有限公司 | Control method and system for track traffic electric power data acquisition and surveillance |
| CN101562727A (en) * | 2008-04-15 | 2009-10-21 | 上海交技发展股份有限公司 | Track traffic video monitoring network management system |
| KR101079846B1 (en) * | 2009-12-01 | 2011-11-03 | 한국가스안전공사 | management system of Gas safety on Ubiquitous bases |
| CN102497279B (en) * | 2011-11-11 | 2014-06-04 | 青岛海信网络科技股份有限公司 | Component management method applicable to tract traffic comprehensive monitoring system |
| CN103010270B (en) * | 2013-01-11 | 2016-03-23 | 广州地铁设计研究院有限公司 | A kind of coordinated control system and method being applied to City Rail Transit System |
| CN105607619A (en) * | 2015-12-25 | 2016-05-25 | 上海电机学院 | Urban rail transit comprehensive monitoring system |
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| CN106803979B (en) * | 2017-02-20 | 2019-10-11 | 深圳创维数字技术有限公司 | A kind of method and system for supporting multiple programs while descrambling |
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