Communication configuration evaluation method and device for airborne DIMA architecture

Abstract

The invention discloses a communication configuration evaluation method for an aviation airborne DIMA architecture, and the method comprises the steps: building a system single model database according to the DIMA architecture, and defining the maximum delay requirement of the end-to-end transmission of a message; a behavior simulation model is established, the actual communication process of the message in the platform is simulated, and end-to-end communication simulation delay is formed; comparing the communication simulation delay with the maximum message delay defined in the system single model database to form simulation alarm information; aiming at the strong real-time message, establishing a deterministic calculation and analysis model, performing deterministic calculation and analysis on communication configuration, and forming worst delay of end-to-end communication; comparing the worst communication delay with the maximum message delay defined in the system single model database to form computational analysis alarm information; and the communication configuration model is optimized by simulating the alarm information and calculating and analyzing the alarm information. According to the method, communication configuration evaluation of the DIMA architecture can be realized, and the requirement that the application range of a DIMA system is continuously increased is met.

Description

Technical Field

[0001] The present invention relates to the technical field of communication configuration evaluation of a DIMA architecture in a distributed integrated modular avionics system, and in particular to communication configuration evaluation of strong real-time communication messages in an airborne DIMA architecture. Background Art

[0002] The DIMA architecture has a broad application space in processing systems such as aerospace, high-speed railways, and automotive electronics. In the aviation airborne DIMA architecture, there are strong real-time messages and general real-time messages. Strong real-time messages require that communication be completed within a specified time.

[0003] As the scope of application increases, the number of resident applications continues to increase, and the communication evaluation method of the DIMA architecture becomes more and more complex. The communication evaluation of the traditional DIMA architecture is usually carried out by scenario testing. This method leads to delayed evaluation results and cannot be fed back to the architecture design in a timely manner. The workload of iterative design is large, and the worst-case test scenario is difficult to build. The cost of building a real test scenario is also high. The aviation airborne DIMA architecture has a defined system model at the beginning of its design, that is, the system model is deterministic, which creates conditions for communication configuration evaluation. The existing DIMA architecture communication evaluation method can no longer meet the needs of applications. Summary of the invention

[0004] The purpose of the invention is to provide a communication configuration evaluation method and device for an aviation airborne DIMA architecture, which conducts end-to-end delay analysis of real-time communication messages in an aviation airborne DIMA architecture through a method combining a system single model database, behavior simulation analysis, and deterministic computing analysis, and realizes communication configuration evaluation of the DIMA architecture to meet the needs of the increasing application scope of the DIMA system. The calculation process of the invention is simple, easy to implement, and has strong engineering applicability. It is suitable for communication configuration evaluation of aviation airborne DIMA architectures of various aircraft platforms, has strong practical value, and is also suitable for communication configuration evaluation of other core computing systems.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A communication configuration evaluation method for an aviation airborne DIMA architecture comprises the following steps:

[0007] Step 1: Establish a single model database of the system according to the DIMA architecture, including the platform resident application / container model, platform architecture model, and communication configuration model; the platform resident application / container model includes the definition of transmission messages and the maximum delay requirement for end-to-end message transmission; the platform architecture model defines the network topology, including platform composition, network interconnection topology, and resident application allocation scheme; the communication configuration model includes the transmission path and configuration parameters of communication messages;

[0008] Step 2: Establish a behavior simulation model based on the system single model database and the network design plan, simulate the actual communication process of each strong real-time message and general real-time message in the platform, and form an end-to-end communication simulation delay; compare the communication simulation delay with the maximum message delay defined in the system single model database, and form a simulation alarm information;

[0009] Step 3: For strong real-time messages, a deterministic computing and analysis model is established based on the system single model database and the network design plan, and a deterministic computing and analysis is performed on the communication configuration to form the worst-case end-to-end communication delay; the worst-case communication delay is compared with the maximum message delay defined in the system single model database to form computing and analysis alarm information;

[0010] Step 4: Optimize the communication configuration model by simulating alarm information and calculating and analyzing the alarm information;

[0011] Step 5: If the alarm information still exists after optimizing the configuration, the communication configuration assessment failure is reported to the user. The user can modify the designed platform architecture and re-conduct the communication configuration assessment.

[0012] Preferably, the behavior simulation model forms a computing resource communication simulation model by simulating the behavior of computing nodes according to the platform composition defined in the platform architecture model, forms a network terminal simulation model by simulating the behavior of network card nodes, forms a network switch simulation model by simulating the behavior of switching nodes, and forms a platform interconnection simulation model according to the network interconnection topology structure model defined in the platform architecture model;

[0013] The computing resource communication simulation model forms a sending message according to the resident application information in the platform architecture model and the message definition information in the platform resident application / container model; the sent message is communicated through the computing resource communication simulation model, the network terminal simulation model, the network switch simulation model, the platform interconnection simulation model and the communication configuration corresponding to each model, and the communication results are counted in the computing resource communication simulation model of the message destination device to form message delay, packet loss rate and link load; combined with user settings, alarm information is formed.

[0014] Preferably, the deterministic computing analysis adopts a network calculation method to form the worst-case message communication delay in the platform through mathematical calculation;

[0015] The deterministic computing analysis model models the deterministic computing analysis method of computing nodes according to the platform composition defined in the platform architecture model to form a computing resource communication analysis model, models the deterministic computing analysis method of network card nodes to form a network terminal analysis model, models the deterministic computing analysis method of switching nodes to form a network switch analysis model, and models the network interconnection topology structure defined in the platform architecture model to form a platform interconnection analysis model;

[0016] In the deterministic computing analysis process, according to the resident application information in the resident application / container model in the platform architecture model and the message definition information in the platform resident application / container model, combined with the computing resource communication analysis model, the network terminal analysis model, the network switch analysis model, the platform interconnection analysis model and the communication configuration corresponding to each model, each communication conflict in the message transmission path is analyzed; the transmission delay and communication backlog of the message in each conflict are calculated through the network calculation method: in the computing resource communication analysis model of the destination device, all communication delays and communication backlogs and other parameters of the transmission path are counted to form end-to-end communication delays and communication backlogs, and alarm information is formed in combination with user settings.

[0017] Preferably, in step 4, the optimized configuration includes changing the transmission path and configuration parameters of the message to form different configuration schemes.

[0018] A communication configuration evaluation device for an aviation airborne DIMA architecture, comprising a model definition module, a behavior simulation analysis module, a deterministic calculation analysis module, and a communication configuration optimization module;

[0019] The model definition module is used to establish a single model database of the system according to the DIMA architecture, including the platform resident application / container model, the platform architecture model, and the communication configuration model; the platform resident application / container model includes the definition of the transmission message and the maximum delay requirement for the end-to-end transmission of the message; the platform architecture model defines the network topology, including the platform composition, the network interconnection topology, and the resident application allocation scheme; the communication configuration model includes the transmission path and configuration parameters of the communication message;

[0020] The behavior simulation analysis module uses the behavior simulation analysis method to perform behavior simulation analysis on the communication configuration according to the system single model database to form an end-to-end communication simulation delay; compares the communication simulation delay with the maximum message delay defined in the system single model database to form simulation alarm information;

[0021] The deterministic computing and analysis module uses a deterministic computing and analysis method to perform deterministic computing and analysis on the communication configuration according to the system single model database to form the worst-case end-to-end communication delay; compares the worst-case communication delay with the maximum message delay defined in the system single model database to form computing and analysis alarm information;

[0022] The communication configuration optimization module optimizes the communication configuration model according to the simulation alarm information and the calculation and analysis alarm information.

[0023] The beneficial effects of the present invention are:

[0024] The consistency of complex model data is ensured through the system's single model database. Communication delay simulation analysis is carried out through behavioral simulation analysis methods. For strong real-time communication, it is also necessary to carry out communication worst-case delay analysis through deterministic calculation methods, and the evaluation results are used to optimize the configuration. The calculation process is simple, easy to implement, and has strong engineering applicability. The present invention only carries out deterministic calculation analysis for strong real-time messages in the architecture communication evaluation process, which reduces the number of messages to be calculated and analyzed, and the evaluation method has good scalability. Compared with building a physical analysis environment, the simulation and analysis scenarios are convenient for adjusting the designed architecture scale, interconnection methods, etc. in the evaluation device, and it is easy to build a new DIMA architecture, which is suitable for the communication configuration evaluation of aviation airborne DIMA processing platforms of various aircraft platforms, and has strong practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flowchart of a method for evaluating communication configuration of an aviation airborne DIMA architecture according to the present invention;

[0026] Figure 2 It is a schematic diagram of the communication configuration of the aviation airborne DIMA architecture;

[0027] Figure 3 It is a functional module diagram of the aviation airborne DIMA architecture communication configuration evaluation device of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] In practical applications, the strong real-time communication messages of the DIMA architecture require the communication to be completed within the specified time, and the worst-case communication evaluation is required. General real-time messages do not need to evaluate the worst-case communication delay. The design and evaluation of the DIMA architecture usually have a certain system model. According to these characteristics, the present invention redefines the communication configuration evaluation method of the aviation airborne DIMA architecture, and conducts communication delay simulation analysis through a behavioral simulation analysis method. For strong real-time communication, it is also necessary to conduct a communication worst-case delay analysis through a deterministic calculation method to achieve the purpose of the present invention.

[0030] See also Figure 1 As shown, a communication configuration evaluation method of an aviation airborne DIMA architecture shown in this embodiment includes the following steps:

[0031] Step 1: Establish a single system model database based on the DIMA architecture, including the platform resident application / container model, platform architecture model, and communication configuration model. The platform resident application / container model includes the definition of transmission messages and the maximum delay requirements for end-to-end message transmission; the platform architecture model defines the network topology, including platform composition, network interconnection topology, and resident application allocation scheme; the communication configuration model includes the transmission path and configuration parameters of communication messages. The system single model database supports the consistency of system data.

[0032] The DIMA architecture consists of one or more distributed computing platforms. All nodes in the DIMA platform are interconnected through a network. There can be one or more switches in the computing platform. Figure 2 The DIMA architecture shown, the platform-resident application / container model, the platform architecture model, and the communication configuration model are defined as follows.

[0033] The platform architecture model is based on Figure 2 The defined platform composition includes a switching node 125, three computing node machines 121 / 122 / 123, and a server node 124. The computing node 121 includes a network card node 131, the computing node 122 includes a network card node 132, and the computing node 123 includes a network card node 133. The defined network interconnection topology is that the switching node 125 connects three computing node machines and a server node for offline computing to form a computing platform. Multiple computing platforms are connected through a switch cascade link 180 to form a DIMA architecture of multiple computing platforms. The defined resident application allocation scheme is that the resident application 101 is allocated to the computing node 122, the resident applications 102 and 103 are allocated to the computing node module 121, and the resident application 104 resides in the computing node 123.

[0034] The definition parameters of message 150 in the platform resident application / container model include:

[0035] Src_app=101,dest_app=104,perid=1ms,length=1024,deadline=5ms,priority=1

[0036] It indicates that the source application is 101, the destination application is 104, the message cycle is 1 millisecond, the message length is 1024 bytes, the maximum message delay is 5ms, and the priority is 1.

[0037] The definition parameters of message 160 include:

[0038] Src_app=103,dest_app=104,perid=1ms,length=1024,deadline=5ms,priority=1

[0039] It indicates that the source application is 103, the destination application is 104, the message cycle is 1 millisecond, the message length is 1024 bytes, the maximum message delay is 5ms, and the priority is 1.

[0040] The transmission path of the message 150 defined in the communication configuration model is as follows: the resident application 101 in the computing node 122 sends the message 150, which is sent to the switching node 125 through the network card node 132. After the message 150 is switched from port 1 to port 3 of the switching node 125, it is sent to the computing node 123 through the network card node 133 and received by the resident application 104.

[0041] The transmission path of the message 160 is defined as follows: the resident application 103 in the computing node 121 sends the message 160 to the switching node 125 through the network card node 131. After the message 160 is switched from port 2 to port 3 of the switching node 125, it is sent to the computing node 123 through the network card node 133 and received by the resident application 104.

[0042] Step 2: Establish a behavioral simulation model based on the system single model database to simulate the actual communication process of each strong real-time message and general real-time message in the platform to form an end-to-end communication simulation delay; compare the communication simulation delay with the maximum message delay defined in the system single model database to form simulation alarm information and fill it back into the system single model database.

[0043] The behavioral simulation model forms a computing resource communication simulation model by simulating the behavior of computing nodes according to the platform composition defined in the platform architecture model, forms a network terminal simulation model by simulating the behavior of network card nodes, forms a network switch simulation model by simulating the behavior of switching nodes, and forms a platform interconnection simulation model according to the network interconnection topology structure defined in the platform architecture model.

[0044] The computing resource communication simulation model generates a sending message based on the resident application information (resident location, application cycle, application execution time) in the platform architecture model and the message definition information (including message cycle, message length, priority, etc.) in the platform resident application / container model; the sent message is communicated through the computing resource communication simulation model, the network terminal simulation model, the network switch simulation model, the platform interconnection simulation model and the communication configuration model corresponding to each model (defined with a communication configuration table): the terminal simulation model sends messages according to the configuration table, and the switch simulation model exchanges data according to the configuration table; the communication results are counted in the computing resource communication simulation model of the message destination device to form message delay, packet loss rate and link load; combined with user settings, alarm information is generated.

[0045] For the message 150 as an example above, its behavior simulation analysis process is as follows: the computing resource communication simulation model of the computing node 122 records the sending time time1 of the message 150, the message 150 is sent through the network terminal simulation model of the network card node 132, the network switch simulation model of the switch 125 performs data forwarding, the network terminal simulation model of the network card node 133 receives the message 150, the computing resource communication simulation model of the computing node 123 receives the message 150, and records the current time time2, and the message delay delay = time2-time1. If the delay is greater than the deadline requirement of 5ms, an alarm message is generated. Depending on whether the messages 150 and 160 arrive at the same time when exchanging data in the network switch simulation model of the switch 125, different exchange delays correspond. Since the modern exchange delay is usually no more than 10 microseconds, the probability of behavior simulation conflict in this scenario is small, that is, the message 160 has almost no effect on the communication of the message 150. When the network load is large and there is a conflict, it will have an impact.

[0046] Step 3: For strong real-time messages, a deterministic computing and analysis model is established based on the system single model database, and deterministic computing and analysis are performed on the communication configuration to form the worst-case end-to-end communication delay; the worst-case communication delay is compared with the maximum message delay defined in the system single model database, computing and analysis alarm information is generated, and is backfilled into the system single model database.

[0047] Deterministic computing analysis uses network calculation methods to form the worst-case message communication delay in the platform through mathematical calculations. The deterministic computing analysis model needs to be tested by building a real platform scenario. For the modeling of strong real-time messages, it is necessary to consider the communication impact of a non-strong real-time message with the maximum load in a competitive relationship to ensure the correctness of the computing analysis model.

[0048] The deterministic computing analysis model models the deterministic computing analysis method of computing nodes according to the platform composition defined in the platform architecture model to form a computing resource communication analysis model, models the deterministic computing analysis method of network card nodes to form a network terminal analysis model, models the deterministic computing analysis method of switching nodes to form a network switch analysis model, and models the network interconnection topology structure defined in the platform architecture model to form a platform interconnection analysis model.

[0049] In the deterministic computing analysis process, according to the resident application information (resident location, application cycle, application execution time) in the resident application / container model in the platform architecture model, according to the message definition information (including message cycle, message length, priority, etc.) in the resident application / container model, combined with the computing resource communication analysis model, network terminal analysis model, network switch analysis model, platform interconnection analysis model and the corresponding communication configuration model of each model (defined with a communication configuration table), each communication conflict in the message transmission path is analyzed; the transmission delay and communication backlog of the message in each conflict are calculated by the network calculation method: in the network calculation, an arrival curve is formed according to the message arrival, and a service curve is formed according to the network sending capacity. According to the arrival curve and the service curve, the transmission delay and communication backlog are calculated. In the computing resource communication analysis model of the destination device, all communication delays and communication backlogs and other parameters of the transmission path are counted to form end-to-end communication delays and communication backlogs, and alarm information is formed in combination with user settings.

[0050] For the message 150 in the above example, the deterministic calculation and analysis process is:

[0051] 1) The computing resource communication analysis model of computing node 121 calculates the sending delay of message 150 in the network terminal analysis model 132 of network card node 132: Since there is no communication conflict in message 150 in network card node 132 in this scenario, the sending delay is the delay caused by the sending process of the message itself, and there is no message conflict delay.

[0052] 2) The network switch analysis model of switching node 125 calculates the switching delay of message 150: Message 160 has the same priority as message 150 and may affect the communication of message 150. It is assumed that 160 affects the communication of message 150, and the switching delay of message 150 is formed through the network calculation method.

[0053] 3) The computing resource communication analysis model of computing node 123 calculates the reception delay of message 150 in network card node 133: message 160 may affect the communication of message 150. Assuming that 160 affects the communication of message 150, the reception delay of message 150 is the delay formed by the reception delay of message 150 and the reception delay of 160.

[0054] 4) Add the delays of the above three stages to form the deterministic communication delay of message 150. If the delay is greater than the deadline requirement of 5ms, an alarm message is generated.

[0055] From the above two delay formation processes of message 150, it can be seen that in the behavior simulation analysis process, the message delay is closely related to the communication load. Only when there is a message conflict, the message delay will increase, so the analysis result is basically consistent with the test process. In the deterministic calculation analysis process, the message delay will inevitably increase, and the analysis result is relatively conservative.

[0056] Step 4: Optimize the communication configuration model by simulating and calculating the alarm information. The optimized configuration includes changing the transmission path and configuration parameters of the message to form different configuration schemes.

[0057] Step 5: If the alarm information still exists after optimizing the configuration, the communication configuration assessment failure is reported to the user. The user can modify the designed platform architecture and re-conduct the communication configuration assessment.

[0058] A second aspect of an embodiment of the present invention provides a communication configuration evaluation device for an aircraft-borne DIMA architecture, which is used to execute the communication configuration evaluation method for an aircraft-borne DIMA architecture in the first aspect, and has the same or similar technical features and technical effects.

[0059] See also Figure 3 As shown, a communication configuration evaluation device for an aviation airborne DIMA architecture includes: a model definition module, a behavior simulation analysis module, a deterministic calculation analysis module, and a communication configuration optimization module.

[0060] Model definition module, used to establish a system single model database and store the system single model. The system single model includes platform resident application / container model, platform architecture model, and communication configuration model.

[0061] The behavior simulation analysis module uses the behavior simulation analysis method to perform behavior simulation analysis on the communication configuration to form an end-to-end communication simulation delay;

[0062] The deterministic computing analysis module adopts a deterministic computing analysis method to perform deterministic computing analysis on the communication configuration to form the worst-case delay of end-to-end communication.

[0063] The communication configuration optimization module optimizes the communication configuration model according to the simulation alarm information and the calculation and analysis alarm information.

[0064] The communication configuration evaluation device of the DIMA architecture onboard an aircraft runs in a server. The server adopts an offline mode and performs a configuration real-time evaluation on the input system model according to the communication configuration evaluation method of the present invention to generate a configuration evaluation result.

[0065] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A communication configuration evaluation method for an aviation airborne DIMA architecture, characterized in that The following steps are involved: Step 1: Establish a single model database of the system based on the DIMA architecture, including the platform resident application / container model, platform architecture model, and communication configuration model; the platform resident application / container model includes the definition of transmission messages and the maximum delay requirement for end-to-end message transmission; the platform architecture model defines the network topology, including platform composition, network interconnection topology, and resident application allocation scheme; The communication configuration model includes the transmission path and configuration parameters of the communication message; Step 2: Establish a behavior simulation model based on the system single model database and the network design plan, simulate the actual communication process of each strong real-time message and general real-time message in the platform, and form an end-to-end communication simulation delay; compare the communication simulation delay with the maximum message delay defined in the system single model database, and form a simulation alarm information; Step 3: For strong real-time messages, a deterministic computing and analysis model is established based on the system single model database and the network design plan, and a deterministic computing and analysis is performed on the communication configuration to form the worst-case end-to-end communication delay; the worst-case communication delay is compared with the maximum message delay defined in the system single model database to form computing and analysis alarm information; Step 4: Optimize the communication configuration model by simulating alarm information and calculating and analyzing the alarm information; Step 5: If the alarm information still exists after the configuration is optimized, the communication configuration assessment failure is reported to the user. The user modifies the designed platform architecture and re-conducts the communication configuration assessment.

2. A method for evaluating communication configuration of an aviation airborne DIMA architecture according to claim 1, characterized in that The behavior simulation model forms a computing resource communication simulation model by simulating the behavior of computing nodes according to the platform composition defined in the platform architecture model, forms a network terminal simulation model by simulating the behavior of network card nodes, forms a network switch simulation model by simulating the behavior of switching nodes, and forms a platform interconnection simulation model according to the network interconnection topology structure defined in the platform architecture model; The computing resource communication simulation model forms a sending message according to the resident application information in the platform architecture model and the message definition information in the platform resident application / container model; The sent messages are communicated through the computing resource communication simulation model, network terminal simulation model, network switch simulation model, platform interconnection simulation model and the communication configurations corresponding to each model. The communication results are counted in the computing resource communication simulation model of the message destination device to form message delay, packet loss rate and link load; combined with user settings, alarm information is generated.

3. The communication configuration evaluation method of an aviation airborne DIMA architecture according to claim 1, characterized in that Deterministic computing analysis uses network calculation methods to form the worst-case message communication delay in the platform through mathematical calculations; The deterministic computing analysis model models the deterministic computing analysis method of computing nodes according to the platform composition defined in the platform architecture model to form a computing resource communication analysis model, models the deterministic computing analysis method of network card nodes to form a network terminal analysis model, models the deterministic computing analysis method of switching nodes to form a network switch analysis model, and models the network interconnection topology structure defined in the platform architecture model to form a platform interconnection analysis model; In the deterministic computing analysis process, according to the resident application information in the resident application / container model in the platform architecture model and the message definition information in the platform resident application / container model, combined with the computing resource communication analysis model, the network terminal analysis model, the network switch analysis model, the platform interconnection analysis model and the communication configuration corresponding to each model, each communication conflict in the message transmission path is analyzed; the transmission delay and communication backlog of the message in each conflict are calculated through the network calculation method: in the computing resource communication analysis model of the destination device, all communication delays and communication backlogs and other parameters of the transmission path are counted to form end-to-end communication delays and communication backlogs, and alarm information is formed in combination with user settings.

4. The communication configuration evaluation method of an aviation airborne DIMA architecture according to claim 1, characterized in that In step 4, the optimized configuration includes changing the transmission path and configuration parameters of the message to form different configuration schemes.

5. A communication configuration evaluation device for an aviation airborne DIMA architecture, characterized in that It includes model definition module, behavior simulation analysis module, deterministic calculation analysis module, and communication configuration optimization module; The model definition module is used to establish a single model database of the system according to the DIMA architecture, including the platform resident application / container model, the platform architecture model, and the communication configuration model; the platform resident application / container model includes the definition of the transmission message and the maximum delay requirement for the end-to-end transmission of the message; the platform architecture model defines the network topology, including the platform composition, the network interconnection topology, and the resident application allocation plan; The communication configuration model includes the transmission path and configuration parameters of the communication message; The behavior simulation analysis module uses the behavior simulation analysis method to perform behavior simulation analysis on the communication configuration according to the system single model database to form an end-to-end communication simulation delay; compares the communication simulation delay with the maximum message delay defined in the system single model database to form simulation alarm information; The deterministic computing and analysis module uses a deterministic computing and analysis method to perform deterministic computing and analysis on the communication configuration according to the system single model database to form the worst-case end-to-end communication delay; compares the worst-case communication delay with the maximum message delay defined in the system single model database to form computing and analysis alarm information; The communication configuration optimization module optimizes the communication configuration model according to the simulation alarm information and the calculation and analysis alarm information.

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