CN113179114A - Inter-satellite routing method for communication satellite, communication satellite and control device - Google Patents
Inter-satellite routing method for communication satellite, communication satellite and control device Download PDFInfo
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- CN113179114A CN113179114A CN202110416065.4A CN202110416065A CN113179114A CN 113179114 A CN113179114 A CN 113179114A CN 202110416065 A CN202110416065 A CN 202110416065A CN 113179114 A CN113179114 A CN 113179114A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
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Abstract
The invention discloses an inter-satellite routing method for communication satellites, a communication satellite and a control device. According to the invention, the next node of the route is determined according to the position of the core network, and parameters are not required to be exchanged among a plurality of communication satellites in the whole process, so that the resource of the communication satellites is prevented from being occupied by the interaction process among the plurality of communication satellites, the working efficiency of the communication satellites is improved, overlong paths are prevented, and the time delay of data transmission is reduced. The invention is widely applied to the technical field of satellite communication.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to an inter-satellite routing method for a communication satellite, the communication satellite and a control device.
Background
The technical concept of "6G ═ 5G + satellite network" is currently presented, that is, the 6G network is realized by combining a satellite mobile network and a 5G mobile network, and the technical idea is to make up for the deficiencies of the mobile networks such as 5G by using the advantages of the low-orbit satellite mobile network, for example, to make mobile communication signals cover the air, the ocean, the forest, the desert area and other areas with wide population, so as to realize real global communication. However, the satellite mobile network has some disadvantages, such as communication distance, power density, multi-antenna deployment, etc., which make the satellite mobile network communication more limited, and the spectrum efficiency of the satellite communication is far lower than that of the contemporary cellular mobile communication system. Therefore, the advantages of the satellite mobile network can be fully utilized by combining the ground mobile network and the satellite mobile network, and the influence of the defects of the satellite mobile network is reduced.
However, combining the terrestrial mobile network with the satellite mobile network also encounters a series of different problems in communication with the terrestrial mobile network, such as that the low-earth satellite does not move like the base station of the terrestrial mobile network is stationary with respect to the ground, and is located above different places of the earth over time, and the coverage of the low-earth satellite with respect to the medium-earth and high-earth satellites is limited, and when the low-earth satellite moves to some place where a terrestrial satellite signal receiving station is not located or is not located, such as on the pacific, inter-satellite transmission and routing of terminal and ground mobile core network data are required. The content of the inter-satellite route is to determine the communication satellite path through which the data transmission between the mobile terminal and the core network passes. In the prior art, parameters are usually required to be exchanged among a plurality of communication satellites and a routing algorithm is executed to determine a communication path, so that resources of the communication satellites are occupied, the working efficiency of the communication satellites is reduced, unnecessary overlong paths are easily caused, or high-orbit satellites are introduced into inter-satellite routing of low-orbit satellites, and the like, so that the time delay of data transmission is increased.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide an inter-satellite routing method for a communication satellite, and a control device.
In one aspect, an embodiment of the present invention provides an inter-satellite routing method for a communication satellite, including the following steps:
a first communication satellite acquires communication data; the starting place of the communication data is a mobile terminal, and the destination of the communication data is a core network;
the first communication satellite determines a first space position where the core network is located;
the first communication satellite selects a second communication satellite according to the first space position;
and the first communication satellite takes the second communication satellite as a next routing node, and the communication data is directly or indirectly forwarded to the core network through the second communication satellite.
Further, the first communication satellite acquires communication data, including:
the first communication satellite directly receives the communication data sent by the mobile terminal;
or
And the first communication satellite receives the communication data directly or indirectly forwarded by the third communication satellite by taking the third communication satellite as the last routing node.
Further, the determining, by the first communication satellite, the first spatial location where the core network is located includes:
the first communication satellite measures the first spatial position when the first communication satellite passes over the position of the core network;
when the first spatial location is included in the communication data, the first communication satellite extracts the first spatial location from the communication data.
Further, when the first spatial position is not included in the communication data, the first communication satellite encapsulates the first spatial position into the communication data after determining the first spatial position.
Further, the first communication satellite selecting a second communication satellite based on the first spatial location, comprising:
the first communication satellite determines a connection line according to the spatial position of the first communication satellite and the first spatial position;
the first communication satellite searches for a communication satellite that is closest to the connection line and can be connected as the second communication satellite.
Further, the first communication satellite selecting a second communication satellite based on the first spatial location, comprising:
the first communication satellite determines a connection line according to the spatial position of the first communication satellite and the first spatial position;
the first communication satellite searches near the space swept by the connecting line in a period of time, and when the communication satellite which is nearest to the plane or the curved surface swept by the connecting line and can be connected is searched, the searched communication satellite is used as the second communication satellite.
Further, the inter-satellite routing method for the communication satellite further comprises the following steps:
when the core network is within the signal coverage range of the first communication satellite, the first communication satellite directly transmits the communication data to the core network;
when the first communication satellite cannot select the second communication satellite, the first communication satellite takes a fourth communication satellite as a next routing node, and the communication data is directly or indirectly forwarded to the core network through the fourth communication satellite; the fourth communication satellite is one or more communication satellites closest to the first communication satellite.
On the other hand, the embodiment of the invention also provides a communication satellite inter-satellite routing method, which comprises the following steps:
a first communication satellite acquires communication data; the starting place of the communication data is a core network, and the destination of the communication data is a mobile terminal;
the first communication satellite determines a second space position where the mobile terminal is located;
the first communication satellite selects a second communication satellite according to the second space position;
and the first communication satellite takes the second communication satellite as a next routing node, and the communication data is directly or indirectly forwarded to the mobile terminal through the second communication satellite.
On the other hand, the embodiment of the invention also comprises a communication satellite which is used as the first communication satellite to execute the inter-satellite routing method of the communication satellite in the embodiment.
On the other hand, the embodiment of the invention also comprises a control device, wherein the control device is used for controlling the communication satellite to be used as the first communication satellite to execute the inter-satellite routing method of the communication satellite in the embodiment
The invention has the beneficial effects that: according to the inter-satellite routing method for the communication satellite, the next node of the route is determined according to the position of the core network, parameters do not need to be exchanged among a plurality of communication satellites in the whole process, so that the fact that the interaction process among the plurality of communication satellites occupies resources of the communication satellite is avoided, the working efficiency of the communication satellite is improved, the phenomenon of overlong paths is avoided, and the time delay of data transmission is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a communication system to which an inter-satellite routing method of a communication satellite is applied in an embodiment;
FIG. 2 is a schematic diagram of a first embodiment of a method for inter-satellite routing for a communications satellite;
FIG. 3 is a schematic structural diagram of communication data encapsulated with a first spatial location in the embodiment;
FIG. 4 is a schematic diagram of a fourth communication satellite selected by the first communication satellite in an embodiment;
fig. 5 is a schematic diagram of a second embodiment of a method for inter-satellite routing for a communication satellite.
Detailed Description
The inter-satellite routing method of the communication satellite in this embodiment may be used in a communication system in which a terrestrial mobile network and a satellite mobile network are combined as shown in fig. 1. Referring to fig. 1, one or more communication satellites in space are connected to a mobile terminal, and the same or another one or more communication satellites are connected to a core network through a satellite signal ground receiving station, and inter-satellite communication is possible between the communication satellites, where the core network may be a core network of a 5G communication network or a more advanced communication network, so that a connection is established between the mobile terminal and the core network. Specifically, the data flow may be from the mobile terminal to the core network or from the core network to the mobile terminal, that is, the mobile terminal may send the communication data to the core network, or the core network may send the communication data to the mobile terminal, and the inter-satellite routing method for the communication satellite in this embodiment may be applied to these two processes.
First, a method for inter-satellite routing of a communication satellite is described below with an embodiment of a process in which a mobile terminal transmits communication data to a core network. In this process, the communication data is originated from the mobile terminal and destined to the core network, and specifically, the inter-satellite routing method for the communication satellite includes the following steps:
S1A, a first communication satellite acquires communication data;
S2A, a first communication satellite determines a first space position where a core network is located;
S3A, selecting a second communication satellite by the first communication satellite according to the first space position;
and S4A, the first communication satellite takes the second communication satellite as a next route node, and the communication data is directly or indirectly forwarded to the core network through the second communication satellite.
The principle of steps S1A-S4A is shown in FIG. 2. Fig. 2 shows a case where the mobile terminal is not within the satellite signal coverage of the first communication satellite but within the satellite signal coverage of the third communication satellite, at this time, the third communication satellite is connected to the mobile terminal to acquire communication data from the mobile terminal, and the third communication satellite serves as a previous routing node of the first communication satellite and forwards the communication data to the first communication satellite, so that the first communication satellite acquires the communication data, which is a case where the third communication satellite directly forwards the communication data. The third communication satellite acquires the communication data forwarded by the routing node, and then forwards the communication data to the first communication satellite, so that the first communication satellite acquires the communication data, which is a case where the third communication satellite indirectly forwards the communication data. Arrows in fig. 2 indicate the flow of communication data.
If the mobile terminal is within the satellite signal coverage of the first communication satellite, the first communication satellite can be directly connected with the mobile terminal to obtain communication data from the mobile terminal.
In step S2A, when the first communication satellite can run in the space orbit to the sky above the location of the core network, the first communication satellite performs handshake communication with the core network to obtain location information corresponding to the core network, and updates the core network location data table stored in the first communication satellite. If the communication data received by the first communication satellite is from a node on a third communication satellite or the like, and the third communication satellite or the like has encapsulated the position information of the core network to which the communication data is to be sent, the first communication satellite can extract the position information corresponding to the core network from the communication data. No matter what form the location information corresponding to the core network is obtained, this embodiment is referred to as a first spatial location. In particular, the first spatial position may have the form shown in table 1.
TABLE 1
| Core network name | Network address | Location information |
| CoreNetwork_1 | 10.10.10.2 | Longitude: 113 ° 30' 26.99 ", latitude: 22 ° 58' 56.35 |
| CoreNetwork_1 | 10.10.10.100 | Longitude: -42 ° 32' 31.95 ", latitude: 22 ℃ 2' 28.284 ″ |
In this embodiment, the position information is expressed by latitude and longitude, and may be expressed in other coordinate forms.
In this embodiment, if the communication data received by the first communication satellite does not include the first spatial location itself, but the first communication satellite performs measurement to obtain the first spatial location, the first communication satellite may encapsulate the first spatial location and information such as a mobile terminal identifier, a mobile terminal location, a core network name or identifier and the like with the communication data, and specifically, with reference to fig. 3, may use the first spatial location and information such as a mobile terminal identifier, a mobile terminal location, a core network name or identifier and the like as a message header of the encapsulated information. When the first communication satellite forwards the communication data to the next node such as the second communication satellite and the nodes further behind, the subsequent nodes can directly analyze the first spatial position from the communication data without a measurement process, and therefore efficiency is improved.
In step S3A, after the first communication satellite obtains the first spatial location, referring to fig. 2, a connection line is determined according to the spatial location of the first communication satellite itself and the first spatial location, and since the location of the satellite signal ground receiving station can be regarded as the location of the core network, the connection line is represented by a gray straight line between the first communication satellite and the satellite signal ground receiving station in fig. 2. The first communication satellite may search for a qualified communication satellite as the second communication satellite in the vicinity of the connection. Specifically, the first communication satellite is closest to the link and connectable for communication as a search target, and when a communication satellite satisfying the condition is searched, the communication satellite is selected as the second communication satellite. When the first communication satellite transmits the communication data to the second communication satellite, the second communication satellite can be regarded as the first communication satellite, the process of searching the second communication satellite serving as the next node by the second communication satellite is the same as that of the first communication satellite, namely, the communication satellite closest to the connecting line and capable of being connected serves as a searching target, and when the communication satellite meeting the condition is searched, the communication satellite is selected as the second communication satellite serving as the next node. When each node searches the next node in the same way, the distribution of the communication satellite actually participating in communication data transmission in the space tends to the connection line between the first node and the core network, so that the length of the whole communication path reaches or tends to be minimized, which is beneficial to reducing communication delay and signal loss and improving communication quality.
In step S3A, when the on-orbit speed of the first communication satellite is fast, the first communication satellite can travel a longer distance in the process of searching for the second communication satellite, that is, the connection line between the first communication satellite and the core network will sweep out a plane or a curved surface in the space, at this time, the above search method can be generalized, and the communication satellite closest to the plane or the curved surface and connectable to the first communication satellite is selected as the second communication satellite, so that the length of the whole communication path can be minimized, which is helpful for reducing the communication delay and the signal loss, and improving the communication quality.
In step S4A, the first communication satellite uses the second communication satellite as the next routing node, and directly or indirectly forwards the communication data to the core network through the second communication satellite. After the first communication satellite sends the communication data to the second communication satellite, if the satellite signal ground receiving station is within the signal coverage range of the second communication satellite, the second communication satellite can be directly connected with the satellite signal ground receiving station, and then the second communication satellite can forward the communication data to the core network, which belongs to the situation that the second communication satellite directly forwards the communication data. If the satellite signal ground receiving station is not in the signal coverage range of the second communication satellite, and the second communication satellite cannot be directly connected with the satellite signal ground receiving station, the second communication satellite can be regarded as a 'first communication satellite', the second communication satellite can execute the process of searching nodes which is the same as that of the first communication satellite, after a third communication satellite meeting the condition is searched, the second communication satellite sends communication data to the third communication satellite, inter-satellite data transmission is completed until the communication data is forwarded to a core network, and the condition belongs to the condition that the second communication satellite indirectly forwards the communication data.
In this embodiment, if the core network itself is within the signal coverage of the first communication satellite, the first communication satellite may not perform the processes of searching for the second communication satellite, and the like, and directly send the communication data to the core network. If the first communication satellite cannot select the second communication satellite by performing the processes of steps S2A and S3A, referring to fig. 4, the first communication satellite directly determines one or more communication satellites closest to the first communication satellite as a fourth communication satellite, and forwards the communication data to the fourth communication satellite with the fourth communication satellite as a next routing node, so that the fourth communication satellite forwards the communication data to the core network directly or indirectly. The direct forwarding means that a satellite signal of a fourth communication satellite can cover the ground receiving station, and the fourth communication satellite directly sends communication data to a core network; the indirect forwarding means that the satellite signal of the fourth communication satellite cannot cover the ground receiving station, the fourth communication satellite needs to continue the process of searching for the next node, after the next node is found, the communication data is sent to the next node, and the communication data is forwarded to the core network by the next node or nodes further behind.
The process of the core network transmitting the communication data to the mobile terminal is similar to the process of the mobile terminal transmitting the communication data to the core network, except that the origin of the communication data becomes the core network and the destination becomes the mobile terminal. When the method is applied to the process that the core network sends communication data to the mobile terminal, the inter-satellite routing method of the communication satellite comprises the following steps:
S1B, a first communication satellite acquires communication data;
S2B, the first communication satellite determines a second space position where the mobile terminal is located;
S3B, the first communication satellite selects a second communication satellite according to the second space position;
and S4B, the first communication satellite takes the second communication satellite as a next route node, and the communication data is directly or indirectly forwarded to the mobile terminal through the second communication satellite.
The principle of steps S1B-S4B is illustrated in FIG. 5, with the arrows in FIG. 5 indicating the flow of communication data. As can be seen from fig. 5, the principle of steps S1B-S4B is similar to that of steps S1A-S4A, except that the flow of communication data is reversed, and the process of the first communication satellite or the like acquiring communication data, searching for the next node, receiving communication data forwarded by the previous node, and the like is the same as that of steps S1A-S4A, so steps S1B-S4B can be understood with reference to the above description of steps S1A-S4A. Likewise, by performing steps S1B-S4B, the same technical effect as performing steps S1A-S4A can be achieved.
In the present embodiment, "first" or "second" of the first communication satellite and the second communication satellite is used only for distinguishing different communication satellites in a specific scene, and actually any communication satellite may be the first communication satellite, the second communication satellite, or the like depending on its task.
The inter-communication satellite routing method in the embodiment may be performed by a communication satellite that is the first communication satellite running its integrated computer program. It is also possible to provide a dedicated control device that sets a plurality of specific communication satellites as the first communication satellite, the second communication satellite, and the like, respectively, and controls these communication satellites to execute the inter-communication-satellite routing method in the embodiment.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer readable medium configured with the computer program, where the medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the methods may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging system, device, or the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory medium or device, whether removable or integrated onto a computing platform, such as a hard disk, optical read and/or write media, RAM, ROM, etc., so that it may be read by a programmable computer, which when read by the computer may be used to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. An inter-satellite routing method for a communication satellite, comprising:
a first communication satellite acquires communication data; the starting place of the communication data is a mobile terminal, and the destination of the communication data is a core network;
the first communication satellite determines a first space position where the core network is located;
the first communication satellite selects a second communication satellite according to the first space position;
and the first communication satellite takes the second communication satellite as a next routing node, and the communication data is directly or indirectly forwarded to the core network through the second communication satellite.
2. The method of claim 1, wherein the obtaining of the communication data by the first communication satellite comprises:
the first communication satellite directly receives the communication data sent by the mobile terminal;
or
And the first communication satellite receives the communication data directly or indirectly forwarded by the third communication satellite by taking the third communication satellite as the last routing node.
3. The method according to claim 1, wherein the determining, by the first communication satellite, the first spatial location where the core network is located comprises:
the first communication satellite measures the first spatial position when the first communication satellite passes over the position of the core network;
when the first spatial location is included in the communication data, the first communication satellite extracts the first spatial location from the communication data.
4. The method of claim 3, wherein when said first spatial location is not included in said communication data, said first communication satellite encapsulates said first spatial location in said communication data after determining said first spatial location.
5. The method according to any one of claims 1-4, wherein said first communication satellite selects a second communication satellite according to said first spatial location, comprising:
the first communication satellite determines a connection line according to the spatial position of the first communication satellite and the first spatial position;
the first communication satellite searches for a communication satellite that is closest to the connection line and can be connected as the second communication satellite.
6. The method for inter-satellite routing of communication satellites according to claims 1-4, wherein the first communication satellite selects a second communication satellite according to the first spatial location, comprising:
the first communication satellite determines a connection line according to the spatial position of the first communication satellite and the first spatial position;
the first communication satellite searches near the space swept by the connecting line in a period of time, and when the communication satellite which is nearest to the plane or the curved surface swept by the connecting line and can be connected is searched, the searched communication satellite is used as the second communication satellite.
7. The method for inter-satellite routing of communication satellites according to any one of claims 1-4, further comprising:
when the core network is within the signal coverage range of the first communication satellite, the first communication satellite directly transmits the communication data to the core network;
when the first communication satellite cannot select the second communication satellite, the first communication satellite takes a fourth communication satellite as a next routing node, and the communication data is directly or indirectly forwarded to the core network through the fourth communication satellite; the fourth communication satellite is one or more communication satellites closest to the first communication satellite.
8. An inter-satellite routing method for a communication satellite, comprising:
a first communication satellite acquires communication data; the starting place of the communication data is a core network, and the destination of the communication data is a mobile terminal;
the first communication satellite determines a second space position where the mobile terminal is located;
the first communication satellite selects a second communication satellite according to the second space position;
and the first communication satellite takes the second communication satellite as a next routing node, and the communication data is directly or indirectly forwarded to the mobile terminal through the second communication satellite.
9. A communications satellite, characterized in that it performs as a first communications satellite the inter-satellite routing method of any one of claims 1 to 8.
10. A control device for controlling a communication satellite such that the communication satellite performs the inter-satellite routing method of the communication satellite according to any one of claims 1 to 8 as a first communication satellite.
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| CN115103360A (en) * | 2022-06-21 | 2022-09-23 | 广州爱浦路网络技术有限公司 | User terminal authentication method in satellite communication, satellite communication system, computer device and storage medium |
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| CN111342885A (en) * | 2020-03-16 | 2020-06-26 | 西安电子科技大学 | Gateway station combination-based satellite network routing method |
| CN112042134A (en) * | 2020-07-09 | 2020-12-04 | 北京小米移动软件有限公司 | Satellite communication method and device, core network element and storage medium |
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| CN115103360A (en) * | 2022-06-21 | 2022-09-23 | 广州爱浦路网络技术有限公司 | User terminal authentication method in satellite communication, satellite communication system, computer device and storage medium |
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