CN113839919B - Transmission data structure configuration method, data transceiving method and communication system - Google Patents
Transmission data structure configuration method, data transceiving method and communication system Download PDFInfo
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Abstract
The invention discloses a configuration method of a transmission data structure, which is used for communication among subsystems of a rail transit signal system and comprises the following steps: defining a model interface table and a field attribute table of a transmission data structure, wherein the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure; and generating an interface equipment index table according to the model interface table, the field attribute table, the equipment interlocking table and the communication program code, and converting the interface equipment index table into a binary form, namely the structure for transmitting data. The invention also discloses a data receiving and transmitting method for forming the transmission data structure by using the configuration method of the transmission data structure, and a communication system among subsystems of a rail transit signal system. The invention can realize off-line configuration of communication data, does not need to modify program codes for communication part change among different subsystems, does not need to recompile software, can reduce failure rate and quicken development period.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a configuration method of a transmission data structure. The invention also relates to a data receiving and transmitting method for forming the transmission data structure by using the configuration method of the transmission data structure, and a communication system among subsystems of the rail transit system.
Background
Rail transit refers to a type of vehicle or transportation system in which operating vehicles need to travel on a particular rail. The most typical rail transit is a railway system consisting of conventional trains and standard railways. With the diversified development of train and railway technologies, rail transit is more and more types, and is not only distributed in long-distance land transportation, but also widely applied to medium-short distance urban public transportation.
The common rail transit includes traditional railways (national railways, intercity railways and urban railways), subways, light rails and trams, and the novel rail transit includes a magnetic suspension rail system, a monorail system (straddle type rail system and suspension type rail system), a passenger automatic rapid transit system and the like. In the Chinese national standard, the term commonly used in urban public transport is defined as the general term of rapid mass transit which usually uses electric energy as power and adopts a wheel-rail running mode.
The subsystem of the rail transit system mainly comprises: the system comprises an environment and equipment monitoring system (BAS), a substation integrated automation system (PSCADA), an Access Control System (ACS), a screen door system (PSD), a flood gate system (FG), a lighting-only control system (KNX), a Motor Control Center (MCC), a fire automatic alarm system (FAS), an automatic fare collection system (AFC), a closed circuit television system (CCTV), a broadcasting system (PA), a signal System (SIG) and the like.
The main method for configuring and analyzing communication data among subsystems of the conventional rail transit signal system comprises the following steps:
1. fixed code scheme, according to interface file making specific coding. This scheme requires the code implementation to be modified again once there is a change on the interface.
2. The fixed code bit table scheme is that a data field of communication is bound with a fixed function in a code by using a code bit table, and the field is configured or analyzed by the function. Although this scheme increases flexibility, a fixed function needs to be written for each field in the code, and in a communication system with large communication traffic, more functions need to be written, which is labor-intensive and difficult to avoid code implementation errors.
Disclosure of Invention
In the summary section a series of simplified form concepts are introduced, which are all simplifications of the prior art in this field, which will be further detailed in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The technical problem to be solved by the invention is to provide a transmission data structure configuration method which can realize an off-line configuration file, and can complete the configuration of communication data among subsystems of a rail transit system without modifying program codes and recompiling software when communication parts (including but not limited to communication requirement change or communication data change) among different subsystems are changed.
The invention also provides a transceiving method for forming the transmission data structure by the configuration method of the transmission data structure.
And, a communication system between subsystems of a rail transit system
In order to solve the technical problem, the invention provides a method for configuring a transmission data structure for communication among subsystems of a rail transit system, which comprises the following steps:
defining a model interface table and a field attribute table of a transmission data structure, wherein the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
and reading the model interface table, the field attribute table, the equipment interlocking table and the communication program code to generate an interface equipment index table, and converting the interface equipment index table into a binary form to be used as a transmission data structure.
Optionally, the configuration method of the transmission data structure is further improved, and an index table of the interface device is generated by adopting the following steps;
scanning all model interface tables, field attribute tables and equipment interlocking tables in a communication program code;
forming an interface device index table according to the quantity of each device in the device interlocking table and the interface model table expansion model interface table;
reading the position of each data field in the internal data structure of the communication program to calculate the offset of the field in the memory, and filling other fields in the field attribute table into the interface device index table.
Optionally, the method for configuring the transmission data structure is further improved, where each field of the field attribute table includes:
the method comprises the following steps of field meaning, the memory size (bit) occupied by the field, and the corresponding transmission data structure position and value range of the field in the communication program of the rail transit system.
In order to solve the above technical problem, the present invention provides a data transceiving method for forming a transmission data structure by using the transmission data structure configuration method, including:
when the transmission data structure is sent, traversing the index table of the interface equipment, obtaining the position of the transmission data structure in the memory to obtain data, converting the data into a format required by communication, and inserting the data into a sending cache;
when the transmission data structure is received, traversing the index table of the interface device, obtaining the size and the position of the memory corresponding to the field, selecting data with corresponding length from the receiving cache, converting the data into the internal format of the application software, and assigning the data to the corresponding memory according to the memory position.
Optionally, the data transceiving method is further improved, and the data sending and receiving can be completed in an off-line configuration file mode.
In order to solve the above technical problem, the present invention provides a communication system for use between subsystems of a rail transit system, including:
the system comprises a definition module, a transmission data structure generation module and a transmission data structure generation module, wherein the definition module is used for defining a model interface table and a field attribute table, the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
the data structure scanning module is used for scanning and acquiring all transmission data structures in the communication program codes of the rail transit system;
the transmission data generation module is used for generating an interface device index table according to the model interface table, the field attribute table, the device interlocking table and the communication program code and converting the interface device index table into a binary form as a transmission data structure;
the sending module traverses the interface equipment index table, obtains the position of the transmission data structure in the memory, obtains data, converts the data into a format required by communication, and inserts the data into a sending cache;
and the receiving module traverses the interface equipment index table, acquires the size and the position of the memory corresponding to the field, selects data with corresponding length from the receiving cache, converts the data into an internal format of the application software, and assigns values to the corresponding memory according to the memory position.
Optionally, the rail transit communication system further comprises: and the visualization module is used for converting the interface device index table into a visualization version display. For example, the interface device index table is converted to an EXCEL table for a worker debug query.
Optionally, the rail transit communication system is further improved, and the transmission data generation module forms the interface device index table in the following manner:
defining a model interface table and a field attribute table, and configuring a structure of transmission data;
reading equipment information in an equipment interlocking table, and instantiating communication content by combining a transmission data structure;
scanning the position of the data field in the transmission data structure of the device required by communication in the internal data structure of the communication program, and calculating the offset of the field in the memory and the offset of other non-device information fields in the field attribute table in the memory.
Optionally, the rail transit communication system is further improved, and each field of the field attribute table includes:
the method comprises the following steps of field meaning, memory size (bit) occupied by the field, and corresponding transmission data structure position and value range of the field in a rail transit system communication program.
Compared with the prior art, the invention at least has the following technical effects:
1. the invention adopts the defined model interface table, the field attribute table and the interlocking table or the equipment list to form a transmission data structure, and describes the data needing to be transmitted as the specified transmission data structure, so that when the communication is carried out among different subsystems, the change of a communication part does not need to modify program codes any more, and the failure rate is reduced.
2. The transmission data structure is formed by a model interface table, a field attribute table and an interlocking table or an equipment list, and the sources of the tables can be called in a rail transit system, so that the transmission data structure can be completed by non-programming personnel, and the development period is shortened.
3. All communication data formats and positions in the transmission data structure can be checked through a visual table, and the error diagnosis speed is increased.
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The accompanying drawings, which are included to provide further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. The drawings are not necessarily to scale, however, and may not be intended to accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the scope of values or properties encompassed by exemplary embodiments in accordance with the invention. The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
fig. 1 is a schematic diagram of a fifth embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure in the specification. The invention is capable of other embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the general concept of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. The following exemplary embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solutions of these exemplary embodiments to those skilled in the art.
A first embodiment;
the invention provides a method for configuring a transmission data structure for communication among subsystems of a rail transit system, which comprises the following steps:
defining a model interface table and a field attribute table of a transmission data structure, wherein the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
and reading the model interface table, the field attribute table, the equipment interlocking table and the communication program code to generate an interface equipment index table, and converting the interface equipment index table into a binary form to be used as a transmission data structure.
Optionally, the configuration method of the transmission data structure is further improved, and an index table of the interface device is generated by adopting the following steps;
defining a model interface table and a field attribute table, and configuring a structure of transmission data;
reading equipment information in an equipment interlocking table, and instantiating communication content by combining a transmission data structure;
scanning the position of the data field in the transmission data structure of the device required by communication in the internal data structure of the communication program, and calculating the offset of the field in the memory and the offset of other non-device information fields in the field attribute table in the memory.
A second embodiment;
the invention provides a method for configuring a transmission data structure for communication among subsystems of a rail transit system, which comprises the following steps:
defining a model interface table and a field attribute table of a transmission data structure, wherein the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
and reading the model interface table, the field attribute table, the equipment interlocking table and the communication program code to generate an interface equipment index table, and converting the interface equipment index table into a binary form to be used as a transmission data structure.
Optionally, the configuration method of the transmission data structure is further improved, and the following steps are adopted to generate the index table of the interface device:
defining a model interface table and a field attribute table, and configuring a structure of transmission data;
reading equipment information in an equipment interlocking table, and instantiating communication content by combining a transmission data structure;
scanning the position of the data field in the transmission data structure of the device required by communication in the internal data structure of the communication program, and calculating the offset of the field in the memory and the offset of other non-device information fields in the field attribute table in the memory.
Wherein, each field of the field attribute table comprises: the method comprises the following steps of field meaning, memory size (bit) occupied by the field, and corresponding transmission data structure position and value range of the field in a rail transit system communication program.
A third embodiment;
the invention provides a data receiving and transmitting method for forming a transmission data structure by using the configuration method of the transmission data structure, which comprises the following steps:
when the transmission data structure is sent, traversing the index table of the interface device, obtaining the position acquisition data of the transmission data structure in the memory, converting the position acquisition data into a format required by communication according to the corresponding relation of the enumeration value, and inserting the format into a sending cache;
when a transmission data structure is received, traversing the index table of the interface equipment, acquiring the size and the position of the memory corresponding to the field, selecting data with corresponding length from the receiving cache, converting the data into the internal format of the application software, acquiring the memory position corresponding to the field, and assigning the memory to the corresponding memory.
Alternatively, further improving the third embodiment, the sending and receiving of data can be done in an off-line profile manner.
A fourth embodiment;
the invention provides a communication system used among subsystems of a rail transit system, which comprises the following components:
the system comprises a definition module, a transmission data structure generation module and a transmission data structure generation module, wherein the definition module is used for defining a model interface table and a field attribute table, the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
the data structure scanning module is used for scanning and acquiring all transmission data structures in the communication program codes of the rail transit system;
the transmission data generation module is used for generating an interface device index table according to the model interface table, the field attribute table, the device interlocking table and the communication program code and converting the interface device index table into a binary system as a transmission data structure;
the sending module traverses the index table of the interface equipment, obtains the position acquisition data of the transmission data structure in the memory, converts the position acquisition data into a format required by communication according to the corresponding relation of the enumeration value, and inserts the format into a sending cache;
and the receiving module traverses the index table of the interface equipment, acquires the size of the memory corresponding to the field, selects data with corresponding length from the receiving cache, converts the data into an internal format of the application software according to the corresponding relation of the enumeration value, acquires the memory position corresponding to the field and assigns the memory position to the corresponding memory.
A fifth embodiment;
referring to fig. 1, the present invention provides a communication system for use between subsystems of a rail transit system, including:
the system comprises a definition module, a transmission data structure generation module and a transmission data structure generation module, wherein the definition module is used for defining a model interface table and a field attribute table, the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
wherein, each field of the field attribute table comprises: the method comprises the following steps of (1) field meaning, memory size (bit) occupied by the field, and corresponding transmission data structure position and value range of the field in a rail transit system communication program;
the data structure scanning module is used for scanning and acquiring all transmission data structures in the communication program codes of the rail transit system;
the transmission data generation module scans all model interface tables, field attribute tables and equipment interlocking tables in the communication program codes; forming an interface equipment index table according to the number of each equipment in the equipment interlocking table and the interface model table expansion model interface table; reading the position of each data field in the internal data structure of the communication program to calculate the offset of the field in the memory, filling other fields in the field attribute table into the interface equipment index table, and converting the interface equipment index table into a binary form as a transmission data structure;
the sending module traverses the index table of the interface equipment, obtains the position of the transmission data structure in the memory, obtains the data, converts the data into a format required by communication, and inserts the format into a sending cache;
the receiving module is used for traversing the index table of the interface equipment, acquiring the size and the position of the memory corresponding to the field, selecting data with corresponding length from the receiving cache, converting the data into an internal format of the application software, and assigning the data to the corresponding memory according to the memory position;
and the visualization module is used for converting the interface device index table into a visualization version display. For example, the interface device index table is converted to an EXCEL table.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not to be construed as limiting the invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (7)
1. A method for configuring a transmission data structure for communication between subsystems of a rail transit signal system, comprising the steps of:
defining a model interface table and a field attribute table of a transmission data structure, wherein the model interface table is used for describing the format and the sequence of the transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
reading a model interface table, a field attribute table, an equipment interlocking table and a communication program code to generate an interface equipment index table, and converting the interface equipment index table into a binary form as a structure for transmitting data; generating an interface equipment index table by adopting the following steps:
defining a model interface table and a field attribute table, and configuring a structure of transmission data;
reading equipment information in an equipment interlocking table, and instantiating communication content by combining a transmission data structure;
scanning the position of the data field in the transmission data structure of the device required by communication in the internal data structure of the communication program, and calculating the offset of the field in the memory and the offset of other non-device information fields in the field attribute table in the memory.
2. The method for configuring a transmission data structure according to claim 1, wherein each field of the field attribute table comprises:
the method comprises the following steps of field meaning, memory size (bit) occupied by the field, and corresponding transmission data structure position and value range of the field in a rail transit system communication program.
3. A data transceiving method for forming a transmission data structure by using the transmission data structure configuration method of claim 2, comprising:
when transmitting the transmission data, traversing the index table of the interface equipment to obtain the position of the transmission data structure in the memory to obtain the data, converting the data into a format required by communication, and inserting the data into a transmission cache;
and traversing the index table of the interface equipment to obtain the size and the position of the memory corresponding to the field when receiving the transmission data, selecting data with corresponding length from the receiving cache, converting the data into the internal format of the application software, and assigning the data to the corresponding memory according to the position of the memory.
4. The data transceiving method of claim 3, wherein: sending and receiving data can be accomplished in an offline profile manner.
5. A communication system for communicating between subsystems of a rail transit signal system, comprising:
the system comprises a definition module, a transmission module and a transmission module, wherein the definition module is used for defining a model interface table and a field attribute table, the model interface table is used for describing the format and the sequence of a transmission data structure, and the field attribute table is used for describing each field in each transmission data structure;
the data structure scanning module is used for scanning and acquiring all transmission data structures in the communication program codes of the rail transit system;
the transmission data generation module is used for generating an interface device index table according to the model interface table, the field attribute table, the device interlocking table and the communication program code and converting the interface device index table into a binary form as a transmission data structure;
the sending module traverses the interface equipment index table, obtains the position of the transmission data structure in the memory to obtain data, converts the data into a format required by communication, and inserts the format into a sending cache;
the receiving module traverses the index table of the interface device, acquires the size and the position of the memory corresponding to the field, selects data with corresponding length from the receiving cache, converts the data into an internal format of the application software, and assigns values to the corresponding memory according to the memory position;
the transmission data generation module forms an interface equipment index table in the following mode;
defining a model interface table and a field attribute table, and configuring a structure of transmission data;
reading equipment information in an equipment interlocking table, and instantiating communication content by combining a transmission data structure;
scanning the position of the data field in the transmission data structure of the device required by communication in the internal data structure of the communication program, and calculating the offset of the field in the memory and the offset of other non-device information fields in the field attribute table in the memory.
6. The communication system of claim 5, further comprising:
and the visualization module is used for converting the interface device index table into a visualization version display.
7. The communication system of claim 5, wherein: each field of the field attribute table comprises:
the field meaning, the memory size (bit) occupied by the field, and the corresponding transmission data structure position and value range of the field in the communication program.
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