A hierarchical construction method and system for satellite communication simulation scenarios

Abstract

The present invention relates to satellite communication system simulation technology, and in particular to a hierarchical construction method and system for satellite communication system simulation scenes. The present invention specifically designs a hierarchical construction system for satellite communication scenes, analyzes satellite communication task requirements and processes, clarifies the elements and features that constitute the scenes, divides the scenes into three layers of description, analyzes and selects existing basic scenes, performs inheritance and secondary design, completes the construction of new scenes, separates the three parts of entity, environment and scene interaction during scene construction, and makes the layers relatively independent, thereby improving the reusability during scene design.

Description

Field of the Invention

[0001] The present invention relates to satellite communication system simulation technology, and in particular to a hierarchical construction method and system for satellite communication system simulation scenarios. Background Art

[0002] Satellite communication technology has attracted widespread attention and application due to its advantages such as large coverage, long communication distance, and flexibility. The satellite communication system is complex and involves many technologies. It is necessary to verify new technologies, new systems, equipment, and system performance through simulation. When completing the simulation of a satellite communication system, it is first necessary to build a simulation scenario, which is the presentation of the physical environment of the satellite communication system in the simulation system. The simulation scenario is the basis for the operation of the simulation system, and its correctness directly determines the confidence of the simulation results. In order to ensure that the simulation scenario can clearly and accurately reflect the status of the actual satellite communication system, it is crucial to describe it reasonably and effectively. The simulation scenario of the satellite communication system involves many elements, the analysis method is complex, and the simulation focus of different scenarios is also different, which puts high demands on the description and construction of the scenario.

[0003] In order to solve the problems of strong association between equipment entities, environment and dynamic scenes in current scene construction methods, difficulty in achieving reuse and low scalability, the present invention proposes a hierarchical construction method and system for satellite communication simulation scenes. According to the process, a hierarchical description of the simulation scene entity layer, environment layer and scene interaction layer can be completed, and the equipment entity, environment and dynamic scenes can be decoupled to achieve the reusability and scalability of the simulation scene. Summary of the invention

[0004] The purpose of the present invention is to separate the three parts of entity, environment and scene interaction during scene construction, so that the levels are relatively independent and the reusability of scene design is improved. The design of satellite communication simulation scene is to analyze according to the requirements of satellite communication tasks, including analyzing the task flow, clarifying the elements and features of the scene, accurately describing the scene, providing initial configuration parameters for the operation of the simulation system, and supporting other more in-depth requirements such as subsequent evaluation.

[0005] The hierarchical construction of the scene in this method is based on the hierarchical construction system of satellite communication simulation scenes. On the basis of analysis, all the elements and features contained in the scene are extracted, and the satellite communication simulation scene is described in layers using the definition of each layer. These elements are dispersed into the entity layer, environment layer and scene interaction layer, and the specific composition of each layer is clarified, thereby forming the final simulation scene architecture.

[0006] The present invention provides a hierarchical construction method for a satellite communication system simulation scenario, comprising the following steps:

[0007] 1) Satellite communication mission requirement analysis: clarify the mission requirements based on satellite communication simulation tasks;

[0008] 2) Satellite communication mission process analysis: based on mission requirements, analyze and consider all links involved in the entire process and design the mission process;

[0009] 3) Scene hierarchical design: according to the task operation process, the elements and characteristic parameters that constitute the scene are clearly defined, and the elements are decomposed into the entity layer, environment layer and scene interaction layer;

[0010] 4) Rapid scene construction: compare the existing basic scenes, find the common elements between the new scene and the existing scenes, as well as the individual elements of the new scene. Select the appropriate scene from the existing basic scenes as the basis for building the new scene, and add the individual elements that the basic scene does not have. When adding, it is still done according to the principle of layering of the entity layer, environment layer and scene interaction layer. Finally, a new satellite communication simulation scene can be quickly built.

[0011] Preferably, in a simulation scene, an entity is the most basic unit. When constructing a scene in layers, an entity belongs to the bottom layer of the entire scene architecture, including various entity elements that constitute the scene.

[0012] Preferably, the environment layer is located in the middle layer of the scenario architecture, covering various natural and man-made environments that affect the satellite communication system, including geography, weather, electromagnetic interference, etc.

[0013] Preferably, the scene interaction layer is located at the top level of the scene architecture, including static and dynamic parts, covering the structural relationship between scene elements, entity motion characteristics, dynamic interaction information between entities, etc.

[0014] For satellite communication systems, entities include satellites in the space segment, earth stations in the ground segment, and various terminals in the application segment. Since this method is aimed at the system simulation of satellite communication and focuses on the construction of simulation scenarios, it is sufficient to define entities at the equipment level without further decomposing them and extending them to specific single machines.

[0015] The description of the entity focuses on the entity itself, which is the inherent attribute of the entity in a static environment. It reflects the performance attributes of the entity itself and is not affected by the dynamic environment in the scene.

[0016] The environment layer is located in the middle layer of the satellite communication layered scenario architecture, above the physical layer, and includes various environments that affect the communication quality of the satellite communication system, including meteorological environment, geographical environment, space propagation environment and interference environment. The meteorological environment covers weather types such as atmosphere, rain, snow, clouds and fog; the geographical environment covers mountainous areas, open areas, cities, oceans, jungles, etc.; the space propagation environment covers air attenuation, Doppler effect and propagation noise; the interference environment includes single-tone, multi-tone, comb spectrum, pulse, noise modulation and other interference styles.

[0017] The scene interaction layer is divided into static and dynamic parts. The static part contains the structural relationship of the simulation scene, which describes the relationship between the scene components, which is determined according to the architecture of the satellite communication system; the dynamic part focuses on the operating characteristics of the entity, the interaction relationship of the entity in the dynamic scene, etc.

[0018] The present invention also provides a hierarchical construction method for a satellite communication system simulation scenario, comprising the following steps:

[0019] 1) Satellite communication task requirement analysis: through the task requirement analysis module, it is obtained that the simulation scenario mainly completes the satellite communication task between multiple terminals;

[0020] 2) Satellite communication task process analysis: through the task process analysis module, the satellite communication simulation scenario must cover the complete process of initiating service application from the terminal, resource allocation, link establishment, routing exchange, interference application and the entire anti-interference communication;

[0021] 3) Scenario hierarchical design: Through the scenario hierarchical design module, the constituent elements of the scenario are clarified, including three satellites in the space segment, one gateway in the ground segment, and 30 user terminals that need to complete communication tasks. The terminal types are relatively complex, covering handheld mobile terminals, vehicle-mounted terminals, ship-mounted terminals, etc. The elements are decomposed according to the physical layer, environmental layer, and scenario interaction layer;

[0022] 4) Rapid scene construction: compare the existing basic scenes, find the common elements between the new scene and the existing scenes, as well as the individual elements of the new scene. Select the appropriate scene from the existing basic scenes as the basis for building the new scene, and add the individual elements that the basic scene does not have. When adding, it is still done according to the principle of layering of the entity layer, environment layer and scene interaction layer. Finally, a new satellite communication simulation scene can be quickly built.

[0023] Preferably, the satellite communication mission requirement analysis also includes information transmission between satellites.

[0024] The present invention also provides a hierarchical construction system for satellite communication system simulation scenarios, comprising:

[0025] Mission requirement analysis module, which clarifies mission requirements based on satellite communication simulation missions;

[0026] The task process analysis module analyzes and considers all the links involved in the entire process according to the task requirements and designs the task process;

[0027] A scene layering design module, which clarifies the elements and characteristic parameters that constitute the scene according to the task operation process, and decomposes the elements into the entity layer, environment layer and scene interaction layer; and

[0028] The scenario rapid construction module compares the existing basic scenarios, searches for the common elements between the new scenario and the existing scenarios, and the individual elements of the new scenario, selects the appropriate scenario from the existing basic scenarios as the basis for building the new scenario, and adds individual elements that the basic scenarios do not have. When adding, it still follows the principle of layering of the entity layer, environment layer, and scenario interaction layer, and finally completes the rapid construction of a new satellite communication simulation scenario.

[0029] When using this method and system to complete the scene description, the single level of unified description of all elements is expanded into a three-dimensional description structure, realizing a clearer, concise and reusable scene architecture. When constructing a new scene, on the basis of decomposing its characteristic elements, analyze and screen other scenes that have been built, find their common elements, and realize the reuse of existing scenes.

[0030] The reusability and scalability of the scene are reflected in the fact that common elements in different scenes can be reused and individual elements can be added. If the dynamic elements in the scene are strongly bound to the entity at the beginning, their dynamic properties will be solidified and cannot be reused in new scenes, requiring complete redevelopment. The hierarchical structure used in this method can achieve flexibility and usability of scene design.

[0031] The present invention is beneficial in that:

[0032] 1. A hierarchical construction system for satellite communication scenarios was designed. By analyzing the requirements and processes of satellite communication tasks, the elements and characteristics of the scenarios were clarified, the scenarios were divided into three layers of description, the existing basic scenarios were analyzed and selected, inheritance and secondary design were carried out, and the new scenarios were constructed;

[0033] 2. The hierarchical structure in the satellite communication hierarchical scenario architecture and the connotation and elements of the physical layer, environment layer and scenario interaction layer are clarified to provide a basis for the realization of the hierarchical architecture of the scenario;

[0034] 3. The three parts of entity, environment and scene interaction are separated during scene construction, and the layers are relatively independent, which improves the reusability of scene design;

[0035] 4. The characteristic attributes in the hierarchical elements are configurable, and the scene design is highly flexible. Therefore, this method is not limited to building a certain type of satellite communication scene, but can be applied to a variety of scenes, with a wide range of applicability and strong scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Hierarchical construction system for satellite communication simulation scenarios.

[0037] Figure 2 A diagram of the scene's hierarchical structure elements.

[0038] Figure 3 This is the layered architecture diagram for scenario 1.

[0039] Figure 4 It is a schematic diagram of the rapid layout design of the model of the present invention. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0041] Example 1

[0042] The hierarchical construction steps of satellite communication scenarios using this system are as follows:

[0043] 1) Satellite communication mission requirements analysis: According to the satellite communication simulation mission, clarify the mission requirements and objectives;

[0044] 2) Satellite communication mission process analysis: Design the mission process based on mission requirements, analyze and consider all links involved in the entire process;

[0045] 3) Scenario hierarchical design: According to the task operation process, the elements and characteristic parameters that constitute the scenario are clarified and represented according to the hierarchical method in this method;

[0046] 4) Rapid scene construction: Compare with the existing basic scenes, find the common elements between the new scene and the existing scenes, as well as the individual elements of the new scene, select the appropriate scene from the existing basic scenes as the basis for building the new scene, and add individual elements that the basic scene does not have. When adding, still follow the principle of layering, and finally complete the rapid construction of a new satellite communication simulation scene.

[0047] Example 2

[0048] When designing the scene elements in layers, you can refer to Figure 2 A diagram of the scene hierarchy elements.

[0049] Next, we select two typical satellite communication simulation scenarios and describe in detail how to implement the description and reconstruction of scenario 2 based on the basic scenario of scenario 1: Scenario 1 is the simplest satellite communication scenario and can be regarded as a basic scenario, including a satellite in the space segment, a gateway in the ground segment, and two user terminals that need to complete the communication task. The environment of scenario 1 is also the simplest, an open area in the city, without malicious human interference. The hierarchical structure in this method is used to decompose the elements of scenario 1, and its hierarchical architecture is as follows: Figure 3 shown.

[0050] Next, we need to build the new scene 2 based on the basic scene 1. Scene 2 is a relatively complex satellite communication scene. The specific construction process is as follows:

[0051] 1) Satellite communication mission requirements analysis

[0052] Through the task requirement analysis module, it is found that the simulation scenario mainly completes the satellite communication task between multiple terminals, and also includes inter-satellite information transmission during the entire mission process.

[0053] 2) Satellite communication mission process analysis

[0054] Through the task process analysis module, it is found that the satellite communication simulation scenario must cover the complete process from terminal initiating service application, resource allocation, link establishment, routing exchange, interference application to the entire anti-interference communication process.

[0055] 3) Scene layering design

[0056] Through the scenario hierarchical design module, it is clear that the components of scenario 2 include 3 satellites in the space segment, 1 gateway in the ground segment, and 30 user terminals that need to complete communication tasks. The terminal types are relatively complex, covering handheld mobile terminals, vehicle terminals, ship terminals, etc. The hierarchical method in this article is used to decompose the elements of scenario 2. Its hierarchical architecture is as follows: Figure 4 shown.

[0057] 4) Rapid scene construction

[0058] Compared with scene 1, scene 2 is much more complex, with a large number of entities, a more varied environment, and more complex scene dynamic information and interactive relationships. After careful analysis, it is found that although the content of scene 2 is much larger than that of scene 1, the overall scene architecture is unified, and scene 1 can be used as a sub-scene of scene 2. By extracting the common elements of the two scenes, scene 1 can be reused when building scene 2.

[0059] Compared with scenario 1, the physical layer elements in scenario 2 are only increased in number, but the static characteristic parameters of the same type of entities are the same and can be freely configured. For example, the number of satellites has only increased from 1 to 3, and the types and number of terminals have only increased, but the extracted static characteristic parameters are the same. Therefore, scenario 2 can completely inherit the physical layer model in scenario 1 when building to reduce repetitive work. The elements of the environmental layer in scenario 2 are more complex than those in scenario 1. The geographical environment involves mountains and oceans, the meteorological environment involves rainy weather, the attenuation during the propagation process is extremely large, and there is also malicious interference, which affects the communication quality. These can be judged as the individual elements of scenario 2 relative to scenario 1, and need to be further developed on the inherited scenario. The types of elements in the scene interaction layer in scenario 2 have not changed much compared with scenario 1, and there are more common elements, so only the characteristic parameters need to be configured. The individual elements mainly involve more complex task processes, cross-satellite communication, and the number of terminals has increased. Therefore, the gateway station needs to add the function of cross-satellite resource allocation. The user management and business management parts also need to be deeply developed on the basis of inheritance. Routing transmission and other processes should also be considered during entity interaction.

[0060] Therefore, when building scene 2, scene 1 can be used as a sub-scene, which can be completely inherited and developed and iterated based on new requirements. It can be concluded that when building complex scenes, if there are multiple basic scenes, and these scenes have different focuses and many individual parts, and their union fully meets the needs of complex scenes, and the parameters are flexible and configurable, then these basic sub-scenes can be fully reused, eliminating repeated development work. The hierarchical architecture, a scene description structure, can easily simplify complex scenes, clearly describe the various elements covered in the scene and their relationships, and achieve rapid reconstruction of the scene to the greatest extent.

Claims

1. A hierarchical construction method for a satellite communication system simulation scenario, comprising the following steps: 1) Satellite communication mission requirement analysis: clarify the mission requirements based on satellite communication simulation tasks; 2) Satellite communication mission process analysis: based on mission requirements, analyze and consider all links involved in the entire process and design the mission process; 3) Scene hierarchical design: according to the task operation process, clarify the elements and characteristic parameters that constitute the scene, and decompose the elements into the entity layer, environment layer and scene interaction layer; 4) Rapid scene construction: compare the existing basic scenes, find the common elements between the new scene and the existing scenes, and the individual elements of the new scene. Select the appropriate scene from the existing basic scenes as the basis for building the new scene, and add the individual elements that the basic scene does not have. When adding, it is still done according to the principle of layering of entity layer, environment layer and scene interaction layer. Finally, a new satellite communication simulation scene can be quickly built. The entity layer is the most basic unit. When constructing scenes in layers, the entity layer belongs to the lowest level of the entire scene architecture, including various entity elements that constitute the scene. The environment layer is located in the middle layer of the scenario architecture, covering various natural and man-made environments that affect the satellite communication system, including geography, weather, and electromagnetic interference; The scene interaction layer is located at the top level of the scene architecture, including static and dynamic parts, covering the structural relationship between scene elements, entity motion characteristics, and dynamic interaction information between entities.

2. A hierarchical construction method for a satellite communication system simulation scenario, comprising the following steps: 1) Satellite communication task requirement analysis: through the task requirement analysis module, it is obtained that the simulation scenario mainly completes the satellite communication task between multiple terminals; 2) Satellite communication task process analysis: Through the task process analysis module, the satellite communication simulation scenario must cover the complete process from terminal initiating service application, resource allocation, link establishment, routing exchange, interference application, and the entire anti-interference communication process; 3) Scenario hierarchical design: Through the scenario hierarchical design module, the constituent elements of the scenario are clarified, including three satellites in the space segment, one gateway station in the ground segment, and 30 user terminals that need to complete communication tasks. The terminal types include handheld mobile terminals, vehicle-mounted terminals, and ship-mounted terminals. The elements are decomposed into the physical layer, environmental layer, and scenario interaction layer; 4) Rapid scene construction: compare the existing basic scenes, find the common elements between the new scene and the existing scenes, as well as the individual elements of the new scene. Select the appropriate scene from the existing basic scenes as the basis for building the new scene, and add individual elements that the basic scene does not have. When adding, it is still done according to the principle of layering of the entity layer, environment layer and scene interaction layer. Finally, a new satellite communication simulation scene can be quickly constructed.

3. The hierarchical construction method of satellite communication system simulation scene according to claim 2, characterized in that: The satellite communication mission requirement analysis also includes information transmission between satellites.

4. A construction system for implementing the hierarchical construction method of the satellite communication system simulation scenario according to any one of claims 1 to 3, comprising: Mission requirement analysis module, which clarifies mission requirements based on satellite communication simulation missions; The task process analysis module analyzes and considers all the links involved in the entire process according to the task requirements and designs the task process; The scenario hierarchical design module clarifies the elements and characteristic parameters that constitute the scenario based on the task operation process, and decomposes the elements according to the levels of the physical layer, environmental layer and scenario interaction layer; and the scenario rapid construction module compares the existing basic scenes, finds the common elements between the newly constructed scenes and the existing scenes, and the individual elements of the newly constructed scenes, selects the appropriate scenes from the existing basic scenes as the basis for constructing the new scenes, and adds the individual elements that the basic scenes do not have. When adding, it still follows the principle of layering of the physical layer, environmental layer and scenario interaction layer, and finally completes the rapid construction of a new satellite communication simulation scenario.

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