CN115412615B - Method for realizing multi-port TCP communication based on nuclear power plant DCS platform software - Google Patents
Method for realizing multi-port TCP communication based on nuclear power plant DCS platform software Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/34—Network arrangements or protocols for supporting network services or applications involving the movement of software or configuration parameters
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Abstract
Because the nuclear power plant DCS system software has the characteristics of single process, fixed period, fixed task time and the like, a large amount of idle time exists in the TCP task time, so that the software processing efficiency is low, the current software processing mode is not beneficial to software maintenance and migration, and aiming at the problem, the invention provides a software scheme design for realizing multi-port TCP communication based on the single process software of the nuclear power plant DCS platform, and the processing efficiency of the nuclear power plant DCS software is improved.
Description
Technical Field
The invention belongs to the technical field of control of a nuclear power plant DCS system, and particularly relates to a software scheme design for realizing multi-port TCP communication based on single-process software of a nuclear power plant DCS platform.
Background
The TCP protocol (Transmission Control Protocol ) is widely used in the control field of a DCS system (Distributed Control System ) of a nuclear power plant, and is used as a transmission layer communication protocol standard. The DCS platform software of the nuclear power plant is of safety importance, and the software is required to have high safety and high reliability. The robustness of the software is generally improved by using a single process, a fixed period and software without an operating system, each task is periodically and circularly scheduled by the software, meanwhile, the execution time of each task of the software is preset, and if the execution time of a certain task exceeds the preset time or the whole running period of the software is overtime, overtime faults can occur to the software.
The software implementation mode in the current nuclear power plant DCS platform is as follows: 1. the software polls each port in turn in a period; 2. the ports are ordered, the software processes one port per cycle in that order, and the process is repeated for a number of cycles until all ports have completed processing.
Because the designed nuclear power plant DCS system software has the characteristics of single process, fixed period, fixed task time and the like, the time for processing the TCP communication task in the software operation process is fixed, and if the mode II is adopted, one port is processed every period, excessive spare time is generated in the TCP task time.
If the mode of fixed period and fixed task time is adopted, each port is sequentially and circularly processed in each period, a software designer must consider the problem of overtime in the early stage of software development, and the DCS platform of the nuclear power plant has requirements on the period time of each equipment module, so that the TCP processing time is limited to be too long, and the setting of other task time must be considered. And if the hardware device upgrades and ports are added, the software may report a timeout failure.
Disclosure of Invention
In this regard, the invention creatively proposes a brand new software scheme implementation mode for realizing multi-port TCP communication by single-process software according to the requirements of the multi-port TCP task processing of the DCS system software of the nuclear power plant, and the implementation mode of the scheme is to automatically allocate and process one or more ports in one period according to the TCP response time and the requirements of the software TCP task time in the running process of the software period.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the method for realizing multi-port TCP communication based on the nuclear power plant DCS platform software comprises the following steps: 1) Confirming the number of externally opened TCP ports of the DCS platform software equipment of the nuclear power plant, and sequencing the ports in sequence; 2) Testing the time required by the TCP task processing section; 3) The TCP ports are grouped and processed in a specified order in cycles.
Further, when single-process software of the DCS platform of the nuclear power plant processes multi-port TCP communication, the number of the ports of the software equipment which are externally opened is firstly determined, and then the port numbers are sequenced.
Further, the software has external open ports a, b, c, d, e and f, and the external open ports a, b and … … are sequentially ordered, and f is 6.
Further, in the test communication process, the security level DCS system software TCP processing task is actually time-consuming, and the operation thereof completes the three-way handshake and establishes the TCP connection channel.
Further, the time T1 is counted when the device receives the process data for the first time, and the time T2 is counted when the task is completed, wherein the difference between the two is the actual time consumption T' of the TCP processing task; the software TCP process allocates time T.
Further, after the time test is completed, logic operation is performed, the maximum processing port number of the software TCP task processing process is calculated, and the calculation method divides the time T allocated for the software TCP task by the actual time consumption T' to form a whole.
Further, in the actual application process, considering the influence of the size of the communication data on the actual time consumption of the processing task, the value of T 'is T' =t '+t, and the size of T is determined according to the value of the actual time consumption T'.
Further, if the value of T/T' is calculated to be 3, the ports a, b, c, d, e, f are divided into two groups, and all ports need to be processed in two cycles, wherein the ports a, b, c are the first group, d, e, f are the second group, each cycle processes one group of ports, and each port of the group is polled in turn in the period of the cycle.
The computer terminal comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the method for realizing multi-port TCP communication based on the nuclear power plant DCS platform software when executing the program.
A computer readable medium having stored thereon a computer program for execution by a processor to implement the method for implementing multi-port TCP communication based on DCS platform software of a nuclear power plant described above.
In summary, the manner proposed herein has the following advantages over the prior art manner one and one:
(1) Improving the processing efficiency of the DCS system software of the nuclear power plant
Because the designed nuclear power plant DCS system software has the characteristics of single process, fixed period, fixed task time and the like, the time for processing the TCP communication task in the software operation process is fixed, and if the mode II is adopted, one port is processed every period, excessive spare time is generated in the TCP task time. For example, fig. 3 shows a comparison of the multiport processing method and the second mode according to the present invention, in which the software TCP task processing time T1, the TCP processing response time T2, and if T1> =t2, the software runs on a device with more than two ports. Therefore, when the TCP task processing time and the TCP response time meet a certain relation, the mode of processing only one port in one period is obviously unsuitable, and the multi-port processing mode is adopted in the situation, so that the free time is greatly reduced, and the processing efficiency is improved.
(2) Improving software maintainability and portability
If the mode of fixed period and fixed task time is adopted, each port is sequentially and circularly processed in each period, a software designer must consider the problem of overtime in the early stage of software development, and the DCS platform of the nuclear power plant has requirements on the period time of each equipment module, so that the TCP processing time is limited to be too long, and the setting of other task time must be considered. If the hardware equipment is upgraded and the ports are added, the software may report overtime faults, and if a multi-port processing mode is used, the problem can be effectively solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention.
Fig. 1 is a software process diagram.
Fig. 2 is a software port packet processing diagram.
FIG. 3 is a graph of process efficiency improvement versus graph.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the principles and features of the present invention will be described in further detail below with reference to the examples and the accompanying drawings, and the exemplary embodiments of the present invention and the descriptions thereof are only for explaining the present invention and are not intended to limit the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the invention.
The following discloses a number of different embodiments or examples of implementing the subject technology. Specific examples of one or more arrangements of features are described below to simplify the disclosure, but the examples are not limiting of the present disclosure, and a first feature described later in this disclosure is connected to a second feature, and may include embodiments that are directly connected to each other, or may include embodiments that form additional features, and further include embodiments that indirectly connect or combine the first feature and the second feature with each other using one or more other intervening features, so that the first feature and the second feature may not be directly connected to each other.
The terms used in the present specification are those general terms that are currently widely used in the art in view of the functions of the present disclosure, but may vary according to the intention, precedent, or new technology in the art of the person of ordinary skill in the art. Furthermore, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Accordingly, the terms used in the specification should not be construed as simple names, but rather based on the meanings of the terms and the general description of the present disclosure.
Flowcharts or text is used in this specification to describe the operational steps performed according to embodiments of the present application. It should be understood that the steps of operations in embodiments of the present application are not necessarily performed in the order of description. Rather, the various steps may be processed in reverse order or simultaneously, as desired. Also, other operations may be added to or removed from these processes.
Because the nuclear power plant DCS system software has the characteristics of single process, fixed period, fixed task time and the like, a large amount of idle time exists in the TCP task time, so that the software processing efficiency is low, the current software processing mode is unfavorable for software maintenance and migration, and aiming at the problem, the design of a software scheme for realizing multi-port TCP communication based on the single process software of the nuclear power plant DCS platform is provided, and the processing efficiency of the nuclear power plant DCS software is improved. Specifically provided are the following embodiments:
examples
The embodiment provides a software scheme design for realizing multi-port TCP communication based on single-process software of a nuclear power plant DCS platform. The processing efficiency of the multi-port TCP communication software of the DCS platform software of the nuclear power plant is improved. The work to be completed in implementing the invention mainly comprises the following three parts, 1) the implementation function interface is used for confirming the number of ports and sequencing the ports; 2) The realization function interface is used for testing the time of the TCP task processing section; 3) The implementation function interface is used to group ports and specify the processing order.
The specific steps are as follows:
1) When single-process software of a nuclear power plant DCS platform processes multi-port TCP communication, firstly, determining the number of externally-opened TCP ports of the software equipment of the nuclear power plant DCS platform, and then sequencing the port numbers, for example, the existing externally-opened ports of the software are a, b, c, d, e and f, and sequencing a is 1, b is 2, … … and f is 6;
2) In the test communication process, the security level DCS system software TCP processes the task and is actually time-consuming, the security level DCS system software TCP runs to complete three-way handshake and establish a TCP connection channel, when the equipment receives process data for the first time, the time T1 is counted, when the task is completed, the time T2 is counted, and the difference between the three times is the actual time-consuming T' of the TCP processing task. The software TCP process allocates time T. The TCP task processing procedure is as shown in figure 1;
3) And after the time test is completed, performing logic operation, and calculating the maximum number of processing ports in the software TCP task processing process, wherein the calculation method divides the time T for the software TCP task allocation by the actual time T' to form a whole. In the actual application process, considering the influence of the size of the communication data volume on the actual time consumption of the processing task, the value of T 'is T' =T '+t, and the size of T takes a reasonable value according to the value of the actual time consumption T'. For example, if the value of T/T' is calculated to be 3, the ports a, b, c, d, e, f may be divided into two groups, and all ports need to be processed in two cycles, where ports a, b, c are the first group, d, e, f are the second group, each cycle processes one group of ports, and each port of the group is polled in turn during the period. The process is as in fig. 2.
The mode proposed in this embodiment has the following advantages compared with the existing mode one and mode two:
(1) Improving the processing efficiency of the DCS system software of the nuclear power plant
Because the designed nuclear power plant DCS system software has the characteristics of single process, fixed period, fixed task time and the like, the time for processing the TCP communication task in the software operation process is fixed, and if the mode II is adopted, one port is processed every period, excessive spare time is generated in the TCP task time. For example, fig. 3 shows a comparison of the multiport processing method and the second mode according to the present invention, in which the software TCP task processing time T1, the TCP processing response time T2, and if T1> =t2, the software runs on a device with more than two ports. Therefore, when the TCP task processing time and the TCP response time meet a certain relation, the mode of processing only one port in one period is obviously unsuitable, and the multi-port processing mode is adopted in the situation, so that the free time is greatly reduced, and the processing efficiency is improved.
(2) Improving software maintainability and portability
If the mode of fixed period and fixed task time is adopted, each port is sequentially and circularly processed in each period, a software designer must consider the problem of overtime in the early stage of software development, and the DCS platform of the nuclear power plant has requirements on the period time of each equipment module, so that the TCP processing time is limited to be too long, and the setting of other task time must be considered. If the hardware equipment is upgraded and the ports are added, the software may report overtime faults, and if a multi-port processing mode is used, the problem can be effectively solved.
The single-process software provided by the invention realizes the software scheme of multi-port TCP communication, reduces the idle task time of the software, and improves the processing efficiency of the DCS software of the nuclear power plant. The single-process program processing multi-port TCP communication software scheme based on the nuclear security level DCS platform has good expansibility and maintainability.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing detailed description of the preferred embodiments has been presented for purposes of illustration and description, and it is to be understood that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, equivalents, alternatives, and improvements within the spirit and principles of the invention.
Claims (9)
1. The method for realizing multi-port TCP communication based on the nuclear power plant DCS platform software is characterized by comprising the following steps of: 1) Confirming the number of externally opened TCP ports of the DCS platform software equipment of the nuclear power plant, and sequencing the ports in sequence; 2) Testing the time required by the TCP task processing section; 3) Grouping TCP ports, and processing according to a specified sequence in a period;
and after the time test is completed, performing logic operation, and calculating the maximum number of processing ports in the software TCP task processing process, wherein the calculation method divides the time T for the software TCP task allocation by the actual time T' to form a whole.
2. The method for realizing multi-port TCP communication based on the nuclear power plant DCS platform software according to claim 1, wherein the method comprises the following steps: when single-process software of a DCS platform of the nuclear power plant processes multi-port TCP communication, firstly, the number of the ports of the externally opened TCP of the software equipment is determined, and then the port numbers are sequentially ordered.
3. The method for implementing multi-port TCP communication based on DCS platform software of nuclear power plant according to claim 2, wherein: the existing external open ports of the software are a, b, c, d, e and f, and the sequence a is 1, b is 2, … … and f is 6.
4. The method for implementing multi-port TCP communication based on DCS platform software of nuclear power plant according to claim 3, wherein: in the test communication process, the security level DCS system software TCP processing task is actually time-consuming, and the security level DCS system software TCP processing task runs to complete three-way handshake and establish a TCP connection channel.
5. The method for implementing multi-port TCP communication based on the DCS platform software of the nuclear power plant according to claim 4, wherein the method comprises the following steps: timing T1 when the device receives process data for the first time, and timing T2 when the task is completed, wherein the difference between the two is the actual time consumption T' of the TCP processing task; the software TCP process allocates time T.
6. The method for implementing multi-port TCP communication based on the nuclear power plant DCS platform software according to claim 5, wherein the method comprises the following steps: in the actual application process, considering the influence of the size of the communication data volume on the actual time consumption of the processing task, the value of T 'is T' =T '+t, and the size of T is calculated according to the value of the actual time consumption T'.
7. The method for implementing multi-port TCP communication based on the nuclear power plant DCS platform software according to claim 6, wherein the method comprises the following steps: and if the value of the T/T' is calculated to be 3, the ports a, b, c, d, e and f are divided into two groups, and all the ports are required to be processed in two cycles, wherein the ports a, b and c are the first group, d, e and f are the second group, each cycle processes one group of ports, and each port of the group is polled in turn in the period of the cycle.
8. A computer terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized by: the method for realizing multi-port TCP communication based on the DCS platform software of the nuclear power plant according to any one of claims 1 to 7 is realized when the processor executes the program.
9. A computer readable medium having a computer program stored thereon, characterized by: the computer program is executed by a processor to implement the method for implementing multi-port TCP communication based on the DCS platform software of nuclear power plant according to any one of claims 1 to 7.
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