CN115173933A - Satellite data processing method and device - Google Patents
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Abstract
The application relates to an on-satellite data processing method and device of a satellite, wherein the satellite comprises a narrow-band beam and a wide-band beam, and the method comprises the steps of receiving a control plane message sent by a satellite terminal through the narrow-band beam; responding to the control plane message and performing on-satellite processing; responding to the control plane message to configure the broadband wave beam; receiving a service message sent by a satellite terminal through a broadband wave beam; and transparently transmitting the service message to the target. According to the scheme of the application, on one hand, control plane messages are subjected to on-satellite processing, so that the time delay of user network access and link establishment and switching time delay between beams and satellites are reduced, the rate of narrow-band beams is low, the transmitted data volume is small, the power consumption of a narrow-band communication baseband is low, the requirements on the weight, power supply and heat dissipation of a satellite are not too large, and the cost can be effectively reduced; on the other hand, the broadband wave beam for transmitting the service message uses the transparent forwarding technology, a broadband communication baseband is not required to be arranged on a satellite, the load weight and the power consumption of the satellite are reduced, and the cost is reduced.
Description
Technical Field
The present application relates to the field of satellite communications technologies, and in particular, to a satellite data processing method and apparatus.
Background
The existing high and medium orbit satellites mostly adopt a single beam type. The low-flux satellite uses narrowband beams and the high-flux satellite uses wideband beams. Low earth orbit satellites, represented by "star chains," also provide users with a single broadband beam.
The broadband communication baseband load has the characteristics of high energy consumption and more components. In order to realize broadband communication on the satellite, the size and weight of the satellite need to be increased to accommodate the broadband communication baseband, and more load is put on the satellite, which may greatly increase the construction cost of the low-orbit satellite.
In addition, the characteristics of short coverage time and high flight speed of the low-orbit communication satellite determine that the application of the low-orbit communication satellite needs a large number of satellites to form a constellation, and a plurality of satellites continuously relay to realize continuous ground service.
However, the requirement of broadband communication is more and more in the existing practical situation, the defects are more and more ignorable for satellite manufacturing or satellite production enterprises, and the cost problems of millions and millions become important factors for restricting the development of the civil aviation and aerospace companies.
Disclosure of Invention
Based on this, according to a first aspect of the present application, there is provided an on-satellite data processing method for a satellite, the satellite including a narrowband beam and a wideband beam, the on-satellite data processing method for the satellite including:
receiving a control plane message sent by a satellite terminal through the narrow-band wave beam;
responding the control surface message and performing on-satellite processing;
configuring a broadband beam in response to the control plane message;
receiving a service message sent by the satellite terminal through the broadband wave beam;
and transparently transmitting the service message to a target, wherein the target is one or more of a target satellite terminal, a target satellite or a target gateway station.
According to a second aspect of the present application, there is provided an on-board data processing device for a satellite, the on-board data processing device comprising a signaling subsystem and a digital load subsystem, wherein:
the signaling subsystem generates a narrow-band wave beam, and is used for receiving a control plane message sent by a satellite terminal through the narrow-band wave beam and carrying out on-satellite processing on the control plane message;
the digital load subsystem generates broadband beams, is used for synchronizing on-satellite processing of the signaling subsystem, responds to the control plane messages to configure the broadband beams, receives service messages sent by the satellite terminal through the broadband beams, and transparently transmits the service messages to a target.
According to a third aspect of the present application, there is provided a non-transitory computer storage medium storing a computer program which, when executed by a plurality of processors, causes the processors to perform the method of the first aspect.
According to the scheme, on one hand, control surface messages are subjected to on-satellite processing, so that the time delay of user network access and link establishment and the time delay of beam switching and inter-satellite switching are reduced, the method is suitable for receiving and transmitting the control surface messages with terminal users, the narrow-band communication base band is low in power consumption and small in quantity, the requirements on weight, power supply and heat dissipation of a satellite are not too large, and the cost can be effectively reduced; on the other hand, the broadband wave beam for transmitting the user plane data uses the transparent forwarding technology, and a broadband communication baseband is not required to be arranged on the satellite, so that the weight and the power consumption of the satellite load are reduced, and the research and development and production cost of the satellite are reduced.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without exceeding the protection scope of the present application.
Fig. 1 is a schematic diagram of a system for a satellite using multi-beam design according to an embodiment of the present application.
Fig. 2 is a flow chart of a method of processing data on a satellite according to an embodiment of the application.
FIG. 3 is a schematic diagram of a satellite processing data using different modes of operation according to one embodiment of the present application.
Fig. 4 is a schematic diagram of a satellite processing data using different operating modes according to another embodiment of the present application.
FIG. 5 is a schematic diagram of a satellite processing data using different modes of operation according to yet another embodiment of the present application.
Fig. 6 is a schematic diagram of an on-board data processing device of a satellite according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The low-earth-orbit communication satellite according to the embodiment of the application is provided with at least two beams: narrowband beams and broadband beams. The narrow-band wave beam realizes the star-finding of the narrow-band communication baseband, namely the narrow-band wave beam communication baseband is arranged on the satellite. Narrow-band beams generally use a larger beam field angle to achieve wider sub-satellite coverage; the broadband wave beam is used for realizing the working mode of transparent transmission (transparent transmission) on the satellite. Broadband beams generally use smaller beam opening angles to achieve higher signal-to-noise ratios and improve communication quality. As shown in fig. 1, a narrow-band beam of a low earth orbit communication satellite can cover N wave positions by using a larger beam angle; a broadband beam of a low earth orbit communication satellite covers a portion of the wave bits, such as wave bits 10, 11, 16, 17, 18, 23, and 24, using a smaller beam angle. The number of narrowband beams, broadband beams, etc. are preset for a satellite.
Fig. 2 is a flow chart of a method of processing data on a satellite according to an embodiment of the application. The satellite includes a narrowband beam and a wideband beam, as shown in fig. 2, the method includes the steps of:
step S201, receiving a control plane message sent by a satellite terminal through the narrow-band wave beam;
step S202, responding the control surface message and carrying out on-board processing;
step S203, responding the control surface message to configure broadband wave beams;
step S204, receiving the service message sent by the satellite terminal through the broadband wave beam;
and S205, transparently transmitting the service message to a target.
In the embodiment of the present application, the satellite terminal is generally a dual-mode terminal, which also includes a narrowband mode and a broadband mode, where sending the control plane message by the satellite terminal is performed in the narrowband mode, and sending the service message by the satellite terminal is performed in the broadband mode.
In an embodiment of the application, a satellite terminal sends a control plane message to a satellite, and the satellite receives the control plane message through a narrowband beam. The control plane message comprises a broadcast message, a response message, a paging message, a resource configuration message, a registration request message, an access request message, a paging request message, a resource scheduling request message and the like; the service message refers to service information such as communication data.
The satellite comprises a narrow-band communication baseband, responds to the control plane message, performs satellite processing, and realizes link establishment (link establishment for short) between the satellite and a satellite terminal, specifically comprises the steps of sending parameters of the satellite to the satellite terminal, and realizing parameter synchronization between the satellite and the satellite terminal; a link is established with the satellite terminal. More specifically, a satellite transmits parameters of the satellite to the satellite terminal via the narrowband beam. The parameters of the satellite comprise system time parameters, networking parameters, ephemeris parameters, satellite-borne platform parameters, communication baseband related parameters and the like of the satellite, so that the satellite terminal can quickly realize system parameter synchronization with the satellite, and the control plane message is combined to realize the link establishment between the satellite and the satellite terminal.
And the satellite responds to the control plane message to configure a broadband beam, wherein in the process of transmitting the control plane message, the satellite knows the actual requirement of the satellite terminal through the messages such as a registration request, an access request, a response, resource configuration and the like, namely, the service resource actually required by the satellite terminal is obtained, the satellite configures the resource for the service message corresponding to the control plane message, the configured resource comprises the broadband beam, and the broadband beam is used for receiving and transmitting the service message of the satellite terminal.
After the satellite performs on-satellite processing on the control plane message, the satellite can configure a broadband beam for the satellite terminal, and the broadband beam is used for receiving and transmitting service messages of the satellite terminal. And after the satellite receives the service message sent by the satellite terminal through the broadband wave beam, the satellite transparently transmits the service message to a target. For the service message transmitted by the satellite terminal, the satellite configures a broadband beam for the service message, and the satellite receives the service message through the broadband beam. The satellite transmits the service message in a transparent transmission mode in the process of transmitting the service message, and forwards the service message to a target, such as another satellite terminal, a gateway station or another satellite. In addition, the satellite, after transparently transmitting the service message, sends a resource management report to the gateway station, the resource management report describing the content related to the transmission of the service message.
According to the method for processing the data on the satellite, on one hand, the control plane message is processed on the satellite, so that the time delay of user network access and link establishment and the time delay of switching between beams and satellites are reduced; on the other hand, the narrow-band wave beam is suitable for control plane message transceiving with a satellite terminal user, the narrow-band communication baseband has low power consumption and small quantity, the overlarge requirements on the weight, power supply and heat dissipation of the satellite are avoided, and the cost can be effectively reduced. In addition, the broadband beam uses a smaller beam opening angle, so that a higher signal-to-noise ratio is realized in the transmission process of the service message, and the communication quality is improved.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are all alternative embodiments and that the acts and modules referred to are not necessarily required for the application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
Fig. 3, 4 and 5 are schematic diagrams of a satellite processing data using different modes of operation.
As shown in fig. 3, the satellite employs on-satellite processing for control plane messages, e.g., to enable registration, access, reply, etc. with two satellite terminals. The satellite transmits the service messages of the two satellite terminals to the gateway station in a transparent transmission mode.
As shown in fig. 4, the satellite performs on-satellite processing on the control plane message, for example, registration, access, response, and the like with two satellite terminals, and after transparently transmitting the service message, the satellite sends a resource management report to the gateway station, where the resource management report describes the content related to the transmission of the service message and the communication with the gateway station. In fig. 4, two satellite terminals are located under the same satellite, the satellite terminals initiate paging requests through the on-satellite baseband, the called terminal and the calling terminal are located under the coverage of the same satellite, and the satellite serves as a relay to establish an end-to-end direct connection communication link for data transmission.
Based on the embodiments shown in fig. 3 and fig. 4, step S205 may specifically include: determining whether the other satellite terminal or the gateway station is under coverage of the satellite; if so, the satellite establishes connection with the other satellite terminal or the gateway station through the narrow-band beam, and transparently transmits the service message to the other satellite terminal or the gateway station through the wide-band beam. In fig. 3 and 4, the satellite terminal initiating the paging request is under the coverage of the same satellite as the target (e.g., another satellite terminal or a gateway station), and the satellite establishes a link between the satellite initiating the paging request and the another satellite terminal or the gateway station and transparently transmits the traffic message to the another satellite terminal or the gateway station.
Based on the embodiment shown in fig. 5, step S205 may specifically include: and when the target is another satellite terminal or the gateway station, judging whether the other satellite terminal or the gateway station is under the coverage of the satellite, establishing connection between the satellite and the other satellite by the satellite, and transparently transmitting the service message to the other satellite through an inter-satellite link. If the called terminal and the calling terminal are not located in the same satellite, a step of message transmission between satellites is further required to be added, so that an end-to-end communication link is realized, and the application of inter-satellite link data transmission is realized, as shown in fig. 5. Unlike fig. 4, in fig. 5, inter-satellite signaling interaction messages are also included, and the inter-satellite signaling interaction messages are control plane messages for inter-satellite communication and also require on-satellite processing.
In fig. 5, the satellite terminal initiating the paging request is not under the coverage of the same satellite as the target (e.g., another satellite terminal or gateway station), and the satellite establishes a link with another satellite and transparently transmits the traffic message to the another satellite, and specifically, establishes a link with the another satellite and transmits the control plane message to the another satellite through the narrowband beam; transmitting service messages transparently through the broadband beam to the other satellite, while another satellite terminal or gateway station is under the coverage of the other satellite, the other satellite transmitting service messages transparently to the other satellite terminal or the gateway station. After the transparent transmission of the service message, the satellite sends a resource management report to the gateway station, which describes the content related to the transmission of this service message.
According to the embodiments of the application, different processing methods are provided for message transmission under different scenes, so that data transmission of the satellite based on the narrow-band wave beam and the wide-band wave beam is more convenient, the power consumption is low, the satellite cost is greatly reduced, and the problems of dynamic spot wave beam application and inter-satellite chain networking application of the low-orbit satellite are solved.
Fig. 6 is a schematic diagram of an onboard data processing device of a satellite according to an embodiment of the application. As shown in fig. 6, the satellite data processing device can be generally divided into three subsystems, namely an OBC subsystem, a signaling subsystem and a digital load subsystem, and the three subsystems can interact with each other to cooperatively complete the processing of satellite data.
In fig. 6, the signaling subsystem generates a narrowband beam for receiving a control plane message transmitted by the satellite terminal through the narrowband beam and performs on-satellite processing on the control plane message.
In one embodiment, the control plane messages include control plane messages for transceiving air interface and control plane messages for inter-satellite communications. In one embodiment, the satellite performs on-board processing of control plane messages received via the narrowband beams. The satellite sends the satellite parameters to the satellite terminal through the signaling subsystem, so that the parameter synchronization of the satellite and the satellite terminal is realized; a connection is established with the satellite terminal according to the control plane message. Specifically, the system time parameters, networking parameters, ephemeris parameters, satellite platform parameters and communication baseband related parameters related to the satellite are sent to the satellite terminal through a broadcast channel through a satellite narrow-band wave beam, so that the satellite terminal can quickly realize system parameter synchronization with the satellite through demodulating broadcast messages.
In one embodiment, the control plane message is processed by the satellite and transmitted using the narrowband beam satellite parameter pair, e.g., by transmitting the satellite parameters to the satellite terminal via the narrowband beam. On one hand, the control surface message is subjected to on-satellite processing, so that the time delay of user network access link establishment and the time delay of switching between beams and satellites are reduced; on the other hand, the speed of the narrow-band wave beam is low, the transmitted data volume is small, the narrow-band communication base band is suitable for receiving and transmitting messages of a control plane between the narrow-band wave beam and a terminal user, the power consumption of the narrow-band communication base band is low, the number of the narrow-band communication base band is small, the requirements on the weight, the power supply and the heat dissipation of a satellite are not too large, and the cost can be effectively reduced.
In fig. 6, the digital load subsystem generates a broadband beam for synchronizing satellite processing of the signaling subsystem, configures the broadband beam in response to the control plane message, receives a service message sent by the satellite terminal through the broadband beam, configures resources in response to the service message, and transparently transmits the service message to a target.
The digital load subsystem allocates resources for the service messages, and allocates resources for the service messages through messages such as registration requests, access requests, responses, resource allocation and the like in the process of transmitting the control plane messages, wherein the allocated resources comprise broadband beams.
In one embodiment, the satellite configures resources for the service messages, including broadband beams, for the service messages, which the satellite transparently transmits using the broadband beams. The broadband wave beam uses a smaller wave beam opening angle, so that higher signal-to-noise ratio is realized in the transmission process of the service message, and the communication quality is improved.
In fig. 6, the OBC subsystem is configured to receive the control plane message and the service message from the signaling subsystem and the digital load subsystem, respectively, and send the control plane message and the service message to another satellite.
According to the on-board data processing apparatus shown in fig. 6, in the embodiments shown in fig. 3 and 4, the satellite terminal initiating the paging request and the target (e.g., another satellite terminal or gateway station) are under the coverage of the same satellite, the signaling subsystem of the satellite establishes a connection between the satellite initiating the paging request and the another satellite terminal or gateway station, and the digital load subsystem of the satellite transparently transmits the service message to the another satellite terminal or gateway station.
According to the on-board data processing apparatus shown in fig. 6, in the embodiment shown in fig. 5, the satellite terminal initiating the paging request is not under the coverage of the same satellite as the target (e.g., another satellite terminal or gateway station), the satellite establishes a connection with another satellite and transparently transmits a service message to the another satellite, and specifically, a signaling subsystem of the satellite transmits a control plane message to an OBC subsystem; the digital load subsystem of the satellite sends a service message to the OBC subsystem; the OBC subsystem transparently transmits the control plane message and the service message to another satellite, and another satellite terminal or a gateway station is under the coverage of the other satellite, and the other satellite transparently transmits the service message to the other satellite terminal or the gateway station.
The communication satellite communication load design scheme combining wide and narrow beams and combining the on-satellite processing and transparent forwarding technology is adopted, so that the contradiction problem of satellite processing, research, development, manufacturing cost and operation and maintenance cost on a high-flux low-orbit communication satellite and the problem of dynamic spot beam application and inter-satellite chain networking application of a low-cost and light low-orbit satellite are solved. The method provides a solution for using the satellite digital loads for the low-cost and lightweight low-orbit broadband satellite. In addition, the method is not only suitable for the constellation system formed by the light low-orbit high-flux communication satellite, but also suitable for other low-orbit and medium-orbit satellite application systems with low cost and light requirements.
Embodiments of the present application also provide a non-transitory computer storage medium storing a computer program, which, when executed by a plurality of processors, causes the processors to execute the method and refinement scheme shown in fig. 2.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the description of the embodiments is only intended to facilitate the understanding of the methods and their core concepts of the present application. Meanwhile, according to the idea of the present application, a person skilled in the art may make changes or modifications based on the specific embodiments and the application range of the present application, and all of them belong to the protection scope of the present application. In view of the above, the description should not be taken as limiting the application.
Claims (10)
1. An on-board data processing method for a satellite, wherein the satellite includes a narrowband beam and a wideband beam, the on-board data processing method for the satellite comprising:
receiving a control plane message sent by a satellite terminal through the narrow-band wave beam;
responding the control surface message and performing on-board processing;
configuring a broadband beam in response to the control plane message;
receiving a service message sent by the satellite terminal through the broadband wave beam;
and transparently transmitting the service message to a target.
2. The method of on-board processing of satellite data according to claim 1, wherein performing on-board processing in response to the control plane message comprises:
sending the parameters of the satellite to the satellite terminal to realize the parameter synchronization of the satellite and the satellite terminal;
a link is established with the satellite terminal.
3. The method of processing data on board a satellite according to claim 2, wherein sending the parameters of the satellite to the satellite terminal comprises:
and sending the parameters of the satellite to the satellite terminal through the narrow-band wave beam.
4. The method for satellite-borne data processing according to claim 1, wherein said transparently transmitting said service message to a target comprises:
when the target is another satellite terminal or a gateway station, judging whether the another satellite terminal or the gateway station is under the coverage of the satellite;
if so, the satellite establishes connection with the other satellite terminal or the gateway station through the narrow-band beam, and transparently transmits the service message to the other satellite terminal or the gateway station through the wide-band beam.
5. The method for on-board data processing by a satellite of claim 4, wherein said transparently transmitting said service message to a target further comprises:
if the other satellite terminal or the gateway station is not under the coverage of the satellite, the satellite establishes connection with the other satellite and transparently transmits the service message to the other satellite through an inter-satellite link;
wherein the other satellite terminal or the gateway station is under the coverage of the other satellite, and the other satellite transparently transmits the service message to the other satellite terminal or the gateway station.
6. An on-board data processing apparatus for a satellite, the on-board data processing apparatus comprising a signaling subsystem and a digital load subsystem, wherein:
the signaling subsystem generates a narrow-band wave beam, and is used for receiving a control plane message sent by a satellite terminal through the narrow-band wave beam and carrying out on-satellite processing on the control plane message;
the digital load subsystem generates broadband beams, is used for synchronizing on-satellite processing of the signaling subsystem, responds to the control plane messages to configure the broadband beams, receives the service messages sent by the satellite terminal through the broadband beams, and transparently transmits the service messages to a target.
7. The satellite on-board data processing apparatus of claim 6, wherein the signaling subsystem is further configured to:
sending satellite parameters to the satellite terminal to realize parameter synchronization of the satellite and the satellite terminal;
and establishing a link with the satellite terminal according to the control plane message.
8. The satellite on-board data processing apparatus of claim 7, wherein the signaling subsystem is further configured to:
and sending the satellite parameters to the satellite terminal through the narrow-band wave beam.
9. The satellite on-board data processing arrangement of any one of claims 6 to 8, further comprising an OBC subsystem for receiving the control plane messages and the traffic messages from the signaling subsystem and the digital load subsystem, respectively, transmitting the control plane messages and the traffic messages to another satellite.
10. A non-transitory computer storage medium storing a computer program that, when executed by a plurality of processors, causes the processors to perform the method of any one of claims 1-5.
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| CN116112065A (en) * | 2023-04-10 | 2023-05-12 | 银河航天(北京)网络技术有限公司 | File sharing method, system, device and storage medium based on satellite communication |
| CN116248171A (en) * | 2023-05-08 | 2023-06-09 | 银河航天(北京)通信技术有限公司 | Internet of things-satellite communication system based on wide-narrow band beam switching |
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