CN115549754A - Core network-based satellite communication high-low orbit switching method, equipment and storage medium - Google Patents
Core network-based satellite communication high-low orbit switching method, equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
- H04B7/18541—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B7/195—Non-synchronous stations
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a core network-based satellite communication high-low orbit switching method, equipment and a storage medium, wherein the method mainly comprises the following steps: acquiring satellite data from a low-orbit satellite cluster chain; calculating a comprehensive threshold value of a low-orbit satellite cluster chain according to satellite data; and when the communication load of the low-orbit satellite cluster chain is higher than or equal to the comprehensive threshold value, performing satellite communication high-low orbit switching. According to the satellite communication high-low orbit switching control system and method based on the core network, the satellite communication switching is carried out under the condition of not influencing or slightly influencing the communication through the classification identification and the communication priority identification of the communication type and the threshold value of the coverage residual time according to the load and the state of the satellite, so that the communication pressure of the low orbit satellite is released and enters a normal state, the communication pressure of a low orbit satellite group chain is effectively relieved, and the communication quality is improved.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a core network-based satellite communication high-low orbit switching method, equipment and a storage medium.
Background
As the number of users and wireless access increases, the communication load on the satellite as part of mobile communications is becoming more and more stressed. The communication of the satellite is usually dependent on a satellite chain in a low orbit, the low orbit satellite receives a communication request continuously from the earth, however, the communication resource of the satellite is not infinite, the network communication with the satellite is influenced or even interrupted due to the aggravated load of the satellite along with the increase of the communication request, and besides the increase of the number of the low orbit satellite, the communication load problem of the satellite can be solved by means of switching the communication to the satellite chain in other orbits.
In the prior art, the judgment basis for the orbit switching of the satellite is basically only the load of the satellite as the reference basis for the orbit switching, and the switching object is only limited to other low-orbit satellites, so that the communication resources of other orbit satellites are not fully utilized.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, and a storage medium for switching between high and low orbits of satellite communication based on a core network.
The invention provides a core network-based satellite communication high-low orbit switching method, which comprises the following steps:
acquiring satellite data from a low-orbit satellite cluster chain;
calculating a comprehensive threshold value of a low-orbit satellite cluster chain according to the satellite data;
and when the communication load of the low-orbit satellite cluster chain is higher than or equal to the comprehensive threshold value, performing satellite communication high-low orbit switching.
Further, the satellite data specifically includes satellite communication loads, satellite states and satellite residual coverage time of each satellite in the low-orbit satellite constellation.
Further, the calculating of the comprehensive threshold of the low earth orbit satellite group chain specifically includes:
calculating a load threshold value of each satellite according to the communication load of the satellite;
calculating a state threshold value of each satellite according to the satellite state of the satellite;
calculating a coverage threshold value of each satellite according to the residual coverage time of the satellite;
carrying out weighted average on the load threshold, the state threshold and the coverage threshold of each satellite in the low-orbit satellite cluster chain to obtain a comprehensive threshold of the low-orbit satellite cluster chain;
and setting a comprehensive threshold value, wherein the comprehensive threshold value is a value of the comprehensive threshold value.
Further, the performing of the satellite communication high-low orbit switching specifically includes the following steps:
acquiring a communication request in a low orbit satellite cluster chain;
screening the communication request to obtain a communication request supporting high-orbit satellite communication;
and switching the communication request supporting the high-orbit satellite communication from the low-orbit satellite cluster chain to the high-orbit satellite in batch.
Further, the screening of the communication request to obtain the communication request supporting the high earth orbit satellite communication specifically includes the following steps:
analyzing the requirement time delay of the communication request from the protocol configuration option of the communication request;
and judging whether the communication request supports high-orbit satellite communication or not according to the demand time delay.
Further, the method also comprises the following steps:
and when the communication load of the low-orbit satellite cluster chain is lower than the comprehensive threshold value, accessing the communication request newly accessed into the low-orbit satellite cluster chain to idle satellites in the low-orbit satellite cluster chain.
Further, the idle satellite is obtained by the following steps:
screening out target satellites within a comprehensive threshold range from the low-orbit satellite cluster;
judging whether the target satellite is within the respective load threshold, state threshold and coverage threshold of the satellite;
satellites that are simultaneously within the respective loading threshold, status threshold, and coverage threshold are determined to be free satellites.
Further, the method also comprises the following steps:
carrying out priority identification on a communication request newly accessed into a low orbit satellite cluster chain;
and determining the sequence of accessing the communication requests to the idle satellite according to the priority identification and the access time of the communication requests.
A second aspect of the invention discloses an electronic device comprising a processor and a memory;
the memory is used for storing programs;
the processor executes the program to realize a high-low orbit switching method of satellite communication based on a core network.
A third aspect of the present invention discloses a computer-readable storage medium storing a program, the program being executed by a processor to implement a method for high-low orbit handover of satellite communication based on a core network.
The embodiment of the invention also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and the computer instructions executed by the processor cause the computer device to perform the foregoing method.
The embodiment of the invention has the following beneficial effects: according to the satellite communication high-low orbit switching control system and method based on the core network, the satellite communication switching is carried out under the condition of not influencing or slightly influencing the communication through the classification identification and the communication priority identification of the communication type and the threshold value of the coverage residual time according to the load and the state of the satellite, so that the communication pressure of the low orbit satellite is released and enters a normal state, the communication pressure of a low orbit satellite group chain is effectively relieved, and the communication quality is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
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 creative efforts.
Fig. 1 is a schematic diagram of a communication network system for high-low orbit satellite convergence based on a core network satellite communication high-low orbit switching method, device and storage medium application of the present invention;
fig. 2 is a flowchart of a basic implementation of a method, an apparatus, and a storage medium for high-low orbit handover of satellite communication based on a core network according to the present invention;
fig. 3 is a flow chart of determining idle satellites in a core network-based satellite communication high-low orbit switching method, device and storage medium according to the present invention;
fig. 4 is a schematic diagram of a core network-based satellite communication high-low orbit switching method, device and storage medium for giving priority identification to a communication request according to the present invention;
fig. 5 is a schematic diagram illustrating a method, device and storage medium for switching between high and low orbits of satellite communication based on a core network according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
In this embodiment, the method for switching between high and low orbits of satellite communication based on a core network is applied to a communication network system with high and low orbits integrated as shown in fig. 1. Referring to fig. 1, a communication network system includes high-orbit satellite links and low-orbit satellite links, which have a larger satellite coverage area than a high-orbit satellite constellation, but have a smaller communication delay than a low-orbit satellite. Since the coverage problem can be overcome by transmitting a plurality of low orbit satellites to form a low orbit satellite constellation chain, in the conventional satellite ground communication process, the communication request of the ground network usually depends on the low orbit satellite constellation chain, and the high orbit satellite link is not preferentially accessed by the communication request. The communication request of the embodiment is sent by the user terminal, the 5G core network forwards the communication request, and the user terminal is not limited to a mobile phone terminal and can be a computer or a tablet electronic terminal; the 5G core network mainly includes an access management network element and a data processing network element, where the access management network element may be an AMF network element, and the data processing network element may be an NWDAF network element. In the same time period, the user terminal can be accessed to the low orbit satellite and can also be accessed to the high orbit satellite, and the user terminal can be switched between the high orbit satellite and the low orbit satellite.
Since most communication requests are set to access the low-orbit satellite constellation preferentially, but the communication resources of the low-orbit satellites are not unlimited, the load of the low-orbit satellites becomes higher and higher as the number of users increases and the access of the communication requests increases. In order to solve the problem that the communication of a low-orbit satellite is affected and even interrupted due to the aggravation of the satellite load, the embodiment of the invention provides a core network-based satellite communication high-low orbit switching method, equipment and a storage medium, and the load pressure of a low-orbit satellite group is relieved by allocating the load to a high-orbit satellite.
The embodiment discloses a core network-based satellite communication high-low orbit switching method, as shown in fig. 2, which mainly includes the following steps:
s1, satellite data is obtained from a low-orbit satellite group chain. In order to intuitively acquire the load pressure of the low orbit satellite in the embodiment, the corresponding satellite data needs to be acquired from the low orbit satellite swarm. Specifically, the satellite data may include a satellite ID, a timestamp, a satellite position, a satellite velocity, and the like, the satellite data required in this embodiment includes a satellite communication load, a satellite state, and a satellite remaining coverage time of each satellite in the low-orbit satellite constellation chain, and these satellite data may be directly obtained from the satellite, or obtained by performing calculation and analysis by an NWDAF network element according to the directly obtained data.
And S2, calculating a comprehensive threshold value of the low-orbit satellite cluster chain according to the satellite data. On the basis of acquiring satellite data in the step S1, the NWDAF network element in the core network mainly determines the comprehensive threshold value. Specifically, firstly, calculating a load threshold of each satellite according to the communication load of the satellite, calculating a state threshold of each satellite according to the satellite state of the satellite, and calculating a coverage threshold of each satellite according to the residual coverage time of the satellite; and then carrying out weighted average on the load threshold, the state threshold and the coverage threshold of each satellite in the low-orbit satellite cluster chain to obtain a comprehensive threshold of the low-orbit satellite cluster chain. As shown in fig. 3, the load threshold, the state threshold and the coverage threshold of the satellite in the present embodiment are a range concept, and each threshold is relatively independent. For a single satellite, each satellite in the low earth orbit satellite constellation has a respective threshold range of loading threshold, state threshold, and coverage threshold, and satellites within the threshold range are considered as spare satellites (normal satellites), satellites above any threshold range are considered as high-loading satellites (busy satellites), and satellites below the threshold range are considered as dormant satellites. Correspondingly, the threshold is a specific value concept and is a specific value within the satellite threshold range, the threshold of each satellite can be obtained by querying a preset threshold table through a table look-up method, and the specific value of the threshold can be dynamically changed according to the actual condition of the satellite. The comprehensive threshold value of the low-orbit satellite cluster chain is obtained by calculating satellite information of each satellite in the low-orbit satellite cluster chain for weighted evaluation, and the average load value of the low-orbit satellite cluster chain is reflected.
The purpose of this embodiment is to perform load distribution when the low earth orbit satellite cluster chain is congested, and therefore it is necessary to control an access request of the low earth orbit satellite cluster chain, which specifically includes the following steps: and when the communication load of the low-orbit satellite cluster chain is lower than the comprehensive threshold value, accessing the communication request newly accessed into the low-orbit satellite cluster chain to idle satellites in the low-orbit satellite cluster chain. In this embodiment, satellites within a threshold range are regarded as idle satellites, and specifically, a target satellite within a comprehensive threshold range is screened out from a low-orbit satellite group chain; secondly, judging whether the target satellite is within the respective load threshold, state threshold and coverage threshold of the satellite; and finally, determining the satellites which are simultaneously within the respective load threshold, state threshold and coverage threshold as idle satellites.
In some embodiments, the access control to the low earth orbit satellite constellation further comprises the steps of: carrying out priority identification on a communication request newly accessed into a low orbit satellite cluster chain; and determining the sequence of accessing the communication requests to the idle satellite according to the priority identification and the access time of the communication requests. Since tens of thousands of communication requests need to access to the satellite constellation chain for communication at each moment, the present embodiment prioritizes the newly accessed communication requests, so that the communication requests with high priority are preferentially accessed to the communication link, and the communication requests with low priority need to be queued for access. Prioritization may include two, three, or more levels, as shown in fig. 4. The priority identity may be determined according to the sending terminal, access base station, etc. of the communication request, e.g. a communication request sent by an authenticated government terminal/base station may be determined as a high priority request, a communication request sent by a normal base station/terminal as a low priority request, etc.
And S3, when the communication load of the low-orbit satellite group chain is higher than or equal to the comprehensive threshold value, switching between high orbit and low orbit of satellite communication. The main means for relieving the load pressure of the low-orbit satellite cluster in this embodiment is to allocate the communication links of some low-orbit satellites to high-orbit satellites. Because the communication request generally does not preferentially select to access the high-orbit satellite for communication, the resources of the high-orbit satellite are not effectively utilized, and the load pressure of the low-orbit satellite group chain can be relieved by allocating the communication link of the low-orbit satellite to the high-orbit satellite. Therefore, firstly, a communication request supporting high-orbit satellite communication needs to be identified from a low-orbit satellite cluster chain, and the method specifically comprises the following steps: analyzing the requirement time delay of the communication request from the protocol configuration option of the communication request; and judging whether the communication request supports high-orbit satellite communication or not according to the demand time delay.
As shown in fig. 5, for different communication requests, their required time delays are usually different, and the required time delay of communication requests such as buffered video, weChat information, and email is usually higher, so that the deployment of these communication requests to an orbiting satellite does not have a significant impact on the communication quality, and thus belongs to the communication requests supporting the communication of the orbiting satellite; the communication requests such as the internet of vehicles and video calls are low in time delay, so that the communication requests are allocated to the high orbit satellite to obviously affect the communication quality, and therefore the communication requests do not belong to the communication requests supporting the high orbit satellite communication.
When the core network receives a communication request, a User Equipment (UE) usually indicates a required time delay of the communication request in a Protocol Configuration Option (PCO) of the communication request, so that the core network may determine whether the communication request supports the high-orbit satellite communication by reading the required time delay in the PCO. After the communication request supporting the high orbit satellite communication in the low orbit satellite cluster chain is determined, the communication request supporting the high orbit satellite communication is switched to the high orbit satellite in batches from the low orbit satellite cluster chain, and the load pressure release of the low orbit satellite cluster chain is completed.
The computer program may be written according to the low-earth-orbit satellite switching control method in this embodiment, and the computer program may be written in a memory of a computer device or an independent storage medium, and when the computer program is read out, the computer program may instruct a processor to execute the low-earth-orbit satellite switching control method in the embodiment, thereby achieving the same technical effect as that of the method embodiment.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the described functions and/or features may be integrated in a single physical device and/or software module, or one or more functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following technologies, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A core network-based satellite communication high-low orbit switching method is characterized by comprising the following steps:
acquiring satellite data from a low-orbit satellite cluster chain;
calculating a comprehensive threshold value of a low-orbit satellite cluster chain according to the satellite data;
and when the communication load of the low-orbit satellite cluster chain is higher than or equal to the comprehensive threshold value, performing satellite communication high-low orbit switching.
2. The method as claimed in claim 1, wherein the satellite data specifically includes satellite communication load, satellite state and satellite remaining coverage time of each satellite in the low earth orbit satellite constellation.
3. The method for switching between high and low orbits of satellite communication based on a core network as claimed in claim 2, wherein the calculating the comprehensive threshold of the low orbit satellite constellation chain specifically comprises:
calculating a load threshold value of each satellite according to the communication load of the satellite;
calculating a state threshold value of each satellite according to the satellite state of the satellite;
calculating a coverage threshold value of each satellite according to the residual coverage time of the satellite;
carrying out weighted average on the load threshold, the state threshold and the coverage threshold of each satellite in the low-orbit satellite cluster chain to obtain a comprehensive threshold of the low-orbit satellite cluster chain;
and setting a comprehensive threshold value, wherein the comprehensive threshold value is a value of the comprehensive threshold value.
4. The method for switching between high and low orbits of satellite communication based on a core network according to claim 1, wherein the switching between high and low orbits of satellite communication specifically includes the following steps:
acquiring a communication request in a low earth orbit satellite cluster chain;
screening the communication request to obtain a communication request supporting high-orbit satellite communication;
and switching the communication request supporting the high-orbit satellite communication from the low-orbit satellite cluster chain to the high-orbit satellite in batch.
5. The method for switching between high and low orbits of satellite communication based on a core network according to claim 4, wherein the step of screening the communication requests to obtain the communication requests supporting the high orbit satellite communication specifically includes the steps of:
analyzing the requirement time delay of the communication request from the protocol configuration option of the communication request;
and judging whether the communication request supports high-orbit satellite communication or not according to the demand time delay.
6. The method for switching high and low orbits of satellite communication based on core network according to claim 3, further comprising the following steps:
and when the communication load of the low-orbit satellite cluster chain is lower than the comprehensive threshold value, accessing the communication request newly accessed into the low-orbit satellite cluster chain into an idle satellite in the low-orbit satellite cluster chain.
7. The method for switching high and low orbits of satellite communication based on core network according to claim 6, wherein the idle satellite is obtained by the following steps:
screening out target satellites within a comprehensive threshold range from the low-orbit satellite cluster;
judging whether the target satellite is within the respective load threshold, state threshold and coverage threshold of the satellite;
satellites that are simultaneously within the respective loading threshold, status threshold, and coverage threshold are determined to be free satellites.
8. The method for switching high and low orbits of satellite communication based on core network according to claim 6, further comprising the steps of:
carrying out priority identification on a communication request newly accessed into a low orbit satellite cluster chain;
and determining the sequence of accessing the communication requests to the idle satellite according to the priority identification and the access time of the communication requests.
9. An electronic device comprising a processor and a memory;
the memory is used for storing programs;
the processor executing the program realizes the method according to any one of claims 1-8.
10. A computer-readable storage medium, characterized in that the storage medium stores a program, which is executed by a processor to implement the method according to any one of claims 1-8.
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| CN116346204A (en) * | 2023-03-27 | 2023-06-27 | 广州爱浦路网络技术有限公司 | Satellite emergency communication control method and system based on new generation core network |
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| CN114499649A (en) * | 2022-03-30 | 2022-05-13 | 阿里巴巴达摩院(杭州)科技有限公司 | Satellite communication method, device, equipment, system and storage medium |
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