CN112468223B - Operation simulation method and system for broadband communication constellation - Google Patents
Operation simulation method and system for broadband communication constellation Download PDFInfo
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- CN112468223B CN112468223B CN202011341555.4A CN202011341555A CN112468223B CN 112468223 B CN112468223 B CN 112468223B CN 202011341555 A CN202011341555 A CN 202011341555A CN 112468223 B CN112468223 B CN 112468223B
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Abstract
The invention provides a broadband communication constellation-oriented operation simulation system which is communicably connected with other subsystems of a ground experiment verification system and comprises a virtual satellite module for simulating a signal processing process of a real broadband communication satellite, a virtual ground station module for simulating a ground operation control station, an operation state configuration and routing module communicably connected with the virtual satellite module and the virtual ground station module, and an interface communication module for communicating with other subsystems of the ground experiment verification system.
Description
Technical Field
The invention relates to the technical field of communication satellites, in particular to a method and a system for simulating operation of a broadband communication constellation.
Background
Before a large-scale satellite constellation is constructed, a ground test verification system needs to be constructed to perform multi-level and multi-layer verification such as key technology verification, system verification, interface verification, application scene verification and the like, and early-stage technical support is provided for the construction of the satellite constellation. After the satellite constellation is built, ground examination of on-orbit satellite faults and ground verification of on-orbit software or system updating are carried out by using a ground test verification system. Meanwhile, the ground test verification system can also be used as a shared open laboratory to provide an experimental platform for scientific researchers performing related researches.
The ground test verification system needs to comprehensively consider the construction cost, the authenticity and the flexibility of the system during construction. Because the components and parts of the satellite are high in grade and expensive, if only the authenticity is considered, the construction cost of the ground test verification system is greatly increased and cannot be borne. Meanwhile, the ground test verification system needs to consider the flexibility of the system, otherwise, the expandability is low after the system is built, and the system is repeatedly built inefficiently. The ground test verification system has the capability of quick and extensible, and provides a simulation verification platform for new technologies and new systems.
The operation simulation system is one of subsystems of a broadband communication constellation ground test verification system. The operation simulation system is used for completing the generation, simulation and control of system operation scenes, is responsible for the scheduling of the whole network digital signals and simulating the whole constellation routing algorithm, and is a control center of the ground test verification system.
Disclosure of Invention
Aiming at the ground test verification requirement of a broadband communication constellation, the invention provides a broadband communication constellation-oriented operation simulation system which is communicably connected with other subsystems of a ground test verification system, and the operation simulation system comprises:
the virtual satellite module is used for simulating the signal processing process of a real broadband communication satellite;
the virtual ground station module is used for simulating a ground operation control station, receiving and processing user communication information and generating and controlling instructions of satellite work simulation;
the operation state configuration and routing module is connected with the virtual satellite module and the virtual ground station module in a communication way, and is used for setting the number and the operation state of satellites, simulating an orbit state, simulating inter-constellation routing, simulating channel delay and simulating operation control; and
and the interface communication module is connected with the running state configuration and routing module and other subsystems of the ground experiment verification system in a communication way, and is used for realizing the communication between the running simulation system and other subsystems of the ground experiment verification system.
Further, the signal processing process of the real broadband communication satellite comprises user digital signal receiving processing, user information demodulation, user information framing, inter-satellite signal processing and inter-satellite information routing forwarding.
Further, the operation simulation system is constructed and formed by adopting digital simulation based on at least one GPU server.
Further, the simulating the channel delay comprises calculating a channel distance according to the running orbit and the route setting of the virtual satellite module simulated satellite, and calculating the channel delay and the signal Doppler dynamic state according to the channel distance and the orbit state.
Further, the operation state configuration and routing module is communicably connected with the virtual satellite module and the virtual ground station module through optical fibers.
Further, the interface communication module is communicably connected with the operation state configuration and routing module and other subsystems of the ground experiment verification system through optical fibers.
Based on the operation simulation system, the invention also provides an operation simulation method facing the broadband communication constellation, which comprises the following steps:
firstly, the number of satellites, the running state and the orbit state of each satellite are set through the running state configuration and routing module, and the inter-satellite routing between each satellite and the ground station is set;
next, receiving a digital signal sent by a user access analog subsystem through the interface communication module, and sending the digital signal to the running state configuration and routing module;
next, the operation state configuration and routing module judges the destination address of the digital signal, processes the digital signal, and sends the processed digital signal to a corresponding system:
if the destination address is the virtual satellite module or the virtual ground station module, the running state configuration and routing module adds dynamic Doppler to the digital signal according to a Doppler generation algorithm and sends the digital signal added with dynamic Doppler to a corresponding module; and
if the destination address is a hardware system of a ground experiment verification system, adding corresponding dynamic state into the digital signal by the running state configuration and routing module, sending the digital signal added with the corresponding dynamic state to an environment simulation subsystem matched with the hardware system, filtering and performing digital-to-analog conversion through the environment simulation subsystem to form an analog signal, and finally sending the analog signal to the corresponding hardware system; and
and finally, the virtual satellite module and/or the virtual ground station module processes the received signals.
The operation simulation system and method for the broadband communication constellation, which are provided by the invention, adopt a full digital simulation scheme of software, avoid the restriction of a hardware state on system upgrading while keeping the simulation of main digital signal processing of the system, greatly improve the flexibility of the system, and greatly enhance the designability, the expansibility and the maintainability of the system. Compared with the traditional DSP + FPGA architecture, the simulation scheme based on the GPU has the advantages of high speed and parallel processing, can complete real-time simulation of hundreds of satellites, realizes real-time simulation of a full constellation scale, and can represent the routing state of a real satellite. Meanwhile, indexes such as system time delay, throughput and the like obtained through simulation can provide more valuable reference for real system construction.
Drawings
To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the present invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.
Fig. 1 is a schematic diagram illustrating a system for simulating operations of a wideband communication constellation according to an embodiment of the present invention; and
fig. 2 is a schematic flow chart illustrating a method for simulating operation of a wideband communication constellation according to an embodiment of the present invention.
Detailed Description
In the following description, the present invention is described with reference to examples. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Further, it should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.
Reference in the specification to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
It should be noted that the embodiment of the present invention describes the process steps in a specific order, however, this is only for the purpose of illustrating the specific embodiment, and does not limit the sequence of the steps. Rather, in various embodiments of the present invention, the order of the steps may be adjusted according to process adjustments.
The operation simulation system is used for realizing generation, simulation and control of an operation scene of the broadband communication constellation ground test verification system, is responsible for scheduling of the whole network digital signal and simulating the whole constellation routing algorithm, and is a control center of the ground test verification system. The invention provides an operation simulation system facing a broadband communication constellation, which finishes the simulation and digital signal processing of hundreds of satellites, the sending and receiving of digital signals of dozens of ground stations, the dynamic routing configuration between the satellites and between the ground stations through a server of a plurality of GPUs, and finishes the Doppler simulation of signals according to the orbit of the satellites and the positions of the ground stations. The solution of the invention is further described below with reference to the accompanying drawings of embodiments.
As shown in fig. 1, an operation simulation system for a broadband communication constellation includes an interface communication module 101, a virtual satellite module 102, a virtual ground station module 103, and an operation state configuration and routing module 104, where the operation state configuration and routing module 104 is communicably connected to the interface communication module 101, the virtual satellite module 102, and the virtual ground station module 103 through, for example, optical fibers. Meanwhile, the operation simulation system is communicably connected with other subsystems of the ground test verification system, for example, the user access simulation subsystem 001, the communication satellite simulation subsystem 002, the ground measurement and control simulation subsystem 003, the ground operation and control simulation subsystem 004, and the environment simulation subsystems 011, 021, 031, 041 corresponding to the subsystems.
In the embodiment shown in fig. 1, the interface communication module 101 and the operation state configuration and routing module 104 are constructed by digital simulation based on a first GPU server, the virtual satellite receiving module 102 is constructed by digital simulation based on a second GPU server, and the virtual ground station module 103 is constructed by digital simulation based on a third GPU server. It should be understood that in other embodiments of the present invention, the number of GPU servers may be other numbers, for example, the interface communication module 101, the virtual satellite module 102, the virtual ground station module 103, and the operation state configuration and routing module 104 are all constructed based on the first GPU server, and for example, a fourth GPU server is further included, and the interface communication module 101, the virtual satellite module 102, the virtual ground station module 103, and the operation state configuration and routing module 104 are constructed based on the first, second, third, and fourth GPU servers, respectively, and so on.
The virtual satellite module 102 is configured to simulate a virtual satellite according to an operating state, and is mainly used for simulating a signal processing process of a real broadband communication satellite, including ground uplink user signal processing, downlink user signal transmission, inter-satellite signal processing and transmission, and the like, wherein the ground uplink user signal processing includes receiving and processing a ground uplink user signal, demodulating user information, and the downlink user signal transmission includes framing the user information.
The virtual ground station module 103 is used for simulating a ground operation and control station signal processing process and an information generating process, including receiving and processing user data, such as communication information, and generating and controlling user data, such as satellite work instructions.
The operation state configuration and routing module 104 is used to complete the planning and control of the whole network routing and the generation and control of the signal doppler, and is the core of the signal flow control of the whole system. The planning of the whole network route comprises the following steps: setting the number and the running state of satellites, simulating the orbit state and simulating the inter-satellite route of a constellation, wherein the generation and the control of the signal Doppler comprise calculating the channel distance according to the simulated orbit state and the inter-satellite route of the constellation, calculating the channel time delay and the signal Doppler dynamic state according to the channel distance and the orbit state, and further simulating the channel time delay, and the control of the whole network route comprises judging the destination addresses of digital signals sent by a user access simulation subsystem received by the interface communication module 101, downlink user signals sent by the virtual satellite simulation module, satellite working instructions sent by the virtual ground station module and the like, and carrying out corresponding processing:
if the destination address is the virtual satellite module or the virtual ground station module, the running state configuration and routing module adds dynamic Doppler to the digital signal according to a Doppler generation algorithm and sends the digital signal added with dynamic Doppler to a corresponding module; and
and if the destination address is a hardware system of the ground experiment verification system, adding corresponding dynamic state into the digital signal by the running state configuration and routing module, sending the digital signal added with the corresponding dynamic state to an environment simulation subsystem matched with the hardware system, filtering and performing digital-to-analog conversion by the environment simulation subsystem to form an analog signal, and finally sending the analog signal to the corresponding hardware system.
The interface communication module 101 is used for realizing communication between the operation simulation system and other subsystems of the ground experiment verification system, and comprises a user digital signal and a digital signal sent by the satellite simulation subsystem, which are received by the user access simulation subsystem, a satellite control signal and user mutual data, which are received by the ground measurement and control simulation subsystem and the ground operation and control simulation subsystem, and the digital signal generated by the operation simulation system is sent to the environment simulation subsystem.
Based on the operation simulation system, the operation simulation can be performed according to an operation simulation method facing the broadband communication constellation as shown in fig. 2:
first, in step 201, settings are initialized. The number of satellites, the running state and the orbit state of each satellite are set through the running state configuration and routing module, and inter-satellite routing between each satellite and the ground station is set;
next, at step 202, an analog-to-digital signal is received. Receiving a digital signal sent by a user access analog subsystem through the interface communication module, and sending the digital signal to the running state configuration and routing module;
next, at step 203, inter-satellite routing is simulated. The operation simulation system determines the position of the ground station and the position of the visible satellite according to the inter-satellite route, the orbit state and the like set in the step 201, simulates the user access process, and sends the digital signal sent by the user to the corresponding satellite for processing, and the operation simulation system comprises the following steps: the running state configuration and routing module judges the destination address of the digital signal, processes the digital signal and sends the processed digital signal to a corresponding system:
if the destination address is the virtual satellite module or the virtual ground station module, the running state configuration and routing module adds dynamic Doppler to the digital signal according to a Doppler generation algorithm, and sends the digital signal added with dynamic Doppler to a module corresponding to the destination address; and
if the destination address is a hardware system of a ground experiment verification system, adding corresponding dynamic state into the digital signal by the running state configuration and routing module, sending the digital signal added with the corresponding dynamic state to an environment simulation subsystem matched with the hardware system, filtering and performing digital-to-analog conversion through the environment simulation subsystem to form an analog signal, and finally sending the analog signal to the hardware system corresponding to the destination address; and
finally, in step 204, the signal is processed in analog. And the virtual satellite module and/or the virtual ground station module processes the signals after receiving the signals. For example, the virtual satellite module performs information demodulation on the received signal, and then performs information framing on the response information to form a downlink user signal or an inter-satellite signal, the virtual ground station module receives a signal center to perform modulation and demodulation, and generates a satellite working instruction according to the information, and the downlink user signal or the inter-satellite signal or the satellite working instruction is sent to a destination module or a system through the operation state configuration and routing module, so that the simulation and digital signal processing of the satellite, the sending and receiving of the digital signal of the ground station, the dynamic routing simulation between the satellite and the satellite, and the dynamic routing simulation between the satellite and the ground station are completed.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Claims (1)
1. A broadband communication constellation-oriented operation simulation method for an operation simulation system is characterized by comprising the following steps:
firstly, the number of satellites, the running state and the orbit state of each satellite are set through the running state configuration and routing module, and the inter-satellite routing between each satellite and the ground station is set;
next, receiving a digital signal sent by a user access analog subsystem through the interface communication module, and sending the digital signal to the running state configuration and routing module;
next, the operation state configuration and routing module judges a destination address of the digital signal, processes the digital signal, and sends the processed digital signal to a system corresponding to the destination address:
if the destination address is the virtual satellite module or the virtual ground station module, the running state configuration and routing module adds dynamic Doppler to the digital signal according to a Doppler generation algorithm, and sends the digital signal added with dynamic Doppler to a module corresponding to the destination address; and
if the destination address is a hardware system of a ground experiment verification system, adding corresponding dynamic state into the digital signal by the running state configuration and routing module, sending the digital signal added with the corresponding dynamic state to an environment simulation subsystem matched with the hardware system, filtering and performing digital-to-analog conversion by the environment simulation subsystem to form an analog signal, and sending the analog signal to the hardware system corresponding to the destination address; and
and finally, the virtual satellite module and/or the virtual ground station module processes the received signals.
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| CN104407520A (en) * | 2014-11-10 | 2015-03-11 | 上海微小卫星工程中心 | Satellite constellation communication based semi-physical simulation system and method thereof |
| CN106211220A (en) * | 2016-06-23 | 2016-12-07 | 中国空间技术研究院 | A kind of isomery interconnection satellite broadband communication semi-physical simulation checking system and method |
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| US6965755B1 (en) * | 2002-11-08 | 2005-11-15 | The Directv Group, Inc. | Comprehensive network monitoring at broadcast satellite sites located outside of the broadcast service area |
| CN106896379B (en) * | 2017-01-19 | 2018-06-29 | 中国人民解放军国防科学技术大学 | Global Satellite Navigation System inter-satellite link actual situation combination verification experimental verification method |
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| CN104407520A (en) * | 2014-11-10 | 2015-03-11 | 上海微小卫星工程中心 | Satellite constellation communication based semi-physical simulation system and method thereof |
| US9887765B1 (en) * | 2015-07-15 | 2018-02-06 | Kythera Software, Inc. | Satellite processor operating system |
| CN106211220A (en) * | 2016-06-23 | 2016-12-07 | 中国空间技术研究院 | A kind of isomery interconnection satellite broadband communication semi-physical simulation checking system and method |
| CN110824508A (en) * | 2019-11-27 | 2020-02-21 | 中国科学院微小卫星创新研究院 | Reconfigurable navigation satellite simulator |
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