CN113328781A - Heaven-earth integration converged network, paging method and core network - Google Patents
Heaven-earth integration converged network, paging method and core network Download PDFInfo
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- CN113328781A CN113328781A CN202110556371.8A CN202110556371A CN113328781A CN 113328781 A CN113328781 A CN 113328781A CN 202110556371 A CN202110556371 A CN 202110556371A CN 113328781 A CN113328781 A CN 113328781A
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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
- H04B7/1851—Systems using a satellite or space-based relay
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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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 world integration fusion network, which comprises a core network and a communication satellite. The integrated heaven-earth network comprises a core network and a plurality of communication satellites, wherein the core network carries out routing selection on a set formed by a first communication satellite group and a second communication satellite group, and the plurality of communication satellites determined through the routing selection initiate paging to a satellite terminal, wherein the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, the elevation angle of the communication satellite in the first communication satellite group relative to the core network is the largest, and the elevation angle of the communication satellite in the second communication satellite group relative to the satellite terminal is the largest. The reliability of all available communication satellites is considered globally, on one hand, the advantages of obtaining the shortest topological path and the like of a routing algorithm can be brought into play, and on the other hand, the characteristics of channel bandwidth, average communication traffic, communication overhead, queue length, propagation delay and the like of the routing can be improved. 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 a world integration fusion network, a paging method and a core network.
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.
In the integrated network, the satellite terminal is connected with the communication satellite, and the core network initiates paging to the satellite terminal through the communication satellite, so the routing problem of the communication satellite is involved. In the existing paging technology, only the path length of local connection among a core network, a communication satellite and a satellite terminal is considered, and the reliability of the path is not considered globally, so that the problems of high delay, communication terminals and the like are easy to occur.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a world-wide integrated convergence network, a paging method, and a core network.
In one aspect, an embodiment includes a world-wide integrated convergence network, including:
a plurality of communication satellites;
a core network; the core network carries out routing selection on a set formed by a first communication satellite group and a second communication satellite group, and initiates paging to a satellite terminal through a plurality of communication satellites determined by the routing selection;
the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, the elevation angle of each communication satellite in the first communication satellite group relative to the core network is maximum, and the elevation angle of each communication satellite in the second communication satellite group relative to the satellite terminal is maximum.
Further, the core network further obtains a real-time position of each communication satellite, and updates the communication satellites in the first communication satellite group according to the real-time position of each communication satellite.
Further, the updating the communication satellites in the first communication satellite group according to the real-time positions of the communication satellites comprises:
determining the elevation angle of each communication satellite relative to the core network according to the real-time position of each communication satellite;
screening out a plurality of communication satellites with the largest elevation angles;
replacing the communication satellites in the first communication satellite group with the screened plurality of communication satellites.
Further, the core network further obtains a real-time position of each communication satellite and a real-time position of the satellite terminal, and updates the communication satellites in the second communication satellite group according to the real-time positions of the communication satellites and the real-time positions of the satellite terminals.
Further, the updating the communication satellites in the second communication satellite group according to the real-time position of each communication satellite and the real-time position of the satellite terminal includes:
determining the elevation angle of each communication satellite relative to the satellite terminal according to the real-time position of each communication satellite and the real-time position of the satellite terminal;
screening out a plurality of communication satellites with the largest elevation angles;
replacing the communication satellite in the second communication satellite group with the screened plurality of communication satellites.
Further, the initiating of paging to the satellite terminal is triggered by a trigger condition.
Further, the trigger condition includes: and the core network receives downlink data sent by the data network.
In another aspect, an embodiment further includes a paging method applied to a world-wide integrated convergence network, where the world-wide integrated convergence network includes a core network and a plurality of communication satellites, and the paging method includes:
the core network carries out routing selection on a plurality of communication satellites in a first communication satellite group and a second communication satellite group, and initiates paging to a satellite terminal through the communication satellites determined by the routing selection;
the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, each communication satellite in the first communication satellite group has the maximum elevation angle relative to the core network, and each communication satellite in the second communication satellite group has the maximum elevation angle relative to the satellite terminal.
In another aspect, the embodiment further includes a core network, where the core network is connected to a plurality of communication satellites; the core network carries out routing selection on a set formed by a first communication satellite group and a second communication satellite group, and initiates paging to a satellite terminal through a plurality of communication satellites determined by the routing selection; the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, the elevation angle of each communication satellite in the first communication satellite group relative to the core network is maximum, and the elevation angle of each communication satellite in the second communication satellite group relative to the satellite terminal is maximum.
The invention has the beneficial effects that: in the integrated space-ground network in the embodiment, each communication satellite in the first communication satellite group and the satellite terminal have a shorter physical path, and generally have a larger channel bandwidth, a larger average traffic volume, a smaller communication overhead, a smaller queue length, and a lower propagation delay. Routing selection is performed on the communication satellites in the first communication satellite group and the second communication satellite group, which is equivalent to that the reliability of all available communication satellites is considered globally, so that on one hand, the advantages of obtaining the shortest topological path and the like of a routing algorithm can be exerted, and the characteristics of channel bandwidth, average communication traffic, communication overhead, queue length, propagation delay and the like of routing can be improved.
Drawings
FIG. 1 is a schematic structural diagram of a world-wide integration convergence network in the embodiment;
FIG. 2 is a schematic diagram of an embodiment for determining an elevation angle of a communication satellite relative to a satellite terminal;
fig. 3 is a flowchart of core network paging satellite terminal in the embodiment.
Detailed Description
The structure of the world-wide integrated convergence network in this embodiment is shown in fig. 1. Referring to fig. 1, one or more communication satellites (space stations) in space are connected to satellite terminals, and the same or another one or more space stations are connected via gateway stations (satellite signal ground receivers) to a Core Network (Core Network, CN) that may be inter-satellite communication, where the Core Network may be a 4G, 5G communication Network or a Core Network of a more advanced communication Network. The satellite terminal can be a mobile phone, a vehicle-mounted instrument, a ship-mounted instrument, an airplane communication device, a ground base station and the like. Referring to fig. 1, the core Network may also be connected with a Data Network (DN).
In this embodiment, the satellite terminal periodically determines its real-time location through positioning technologies such as GPS positioning and Beidou positioning, and uploads its real-time location to the core network in real time. The specific process comprises the following steps: the satellite terminal periodically sends the position information to a communication satellite directly connected with the satellite terminal, the communication satellite forwards the position information of the satellite terminal to a ground station, and the ground station sends the position information of the satellite terminal to a core network. In this way, the core network can periodically collect and update the real-time location of the satellite terminal.
In this embodiment, the core network also periodically collects and updates the real-time location of each communication satellite. The specific process comprises the following steps: the core network acquires ephemeris data of each communication satellite, and may calculate the real-time position of the communication satellite according to the ephemeris data, for example, for two lines of ephemeris data, the real-time position of the communication satellite may be calculated by using an SGP4 model, or the real-time position of the communication satellite may be calculated by using six almanac orbits of the satellite.
In this embodiment, the core network obtains its own location through the AMF unit in the core network. The obtained real-time position of the satellite terminal, the real-time position of the communication satellite and the self-position of the core network can be converted into an earth-centered earth-fixed coordinate system (ECEF) form so as to facilitate unified calculation.
In this embodiment, the core network and the satellite terminal are on the ground, and each communication satellite is in the outer space, and the core network can calculate an elevation angle of each communication satellite relative to the satellite terminal and an elevation angle of each communication satellite relative to the core network according to the real-time position of the satellite terminal in the ECEF format, the real-time position of the communication satellite, and the position of the core network itself. The elevation angle of the communication satellite relative to the satellite terminal can refer to an included angle formed by a connecting line of the communication satellite and the satellite terminal and a ground plane of a place where the satellite terminal is located; the elevation angle of the communication satellite relative to the core network may refer to an included angle between a connection line of the communication satellite and the core network and a ground plane of a place where the core network is located.
For example, in fig. 2, the satellite terminal is located at point O on the ground, the straight line MN is a straight line tangent to the earth surface at point O, and the three communication satellites are located at points a, B, and C in space, so that the elevation angles of the three communication satellites with respect to the satellite terminal are ═ AOM, ═ BON, and ═ CON, respectively.
In this embodiment, the core network sorts the elevation angles of the communication satellites with respect to the satellite terminal from large to small, and screens out M communication satellites with the largest elevation angles, and the M communication satellites are incorporated into the first communication satellite group. Since the communication satellite and the satellite terminal are moving relatively to the ground, the elevation angle of the communication satellite relative to the satellite terminal is also changing, and the core network periodically calculates the elevation angle of the communication satellite relative to the satellite terminal, so that the M communication satellites screened each time may be different. After M communication satellites are screened out each time, the M communication satellites replace original communication satellites in the first communication satellite group, and therefore updating of the first communication satellite group is achieved.
Similarly, the core network sorts the elevation angles of the communication satellites relative to the core network from large to small, and screens out the N communication satellites with the largest elevation angles, and the N communication satellites are programmed into the second communication satellite group. Because the communication satellite moves relative to the ground, the elevation angle of the communication satellite relative to the core network also changes, and the core network periodically calculates the elevation angle of the communication satellite relative to the core network, so that the N communication satellites screened each time may be different. And after N communication satellites are screened out each time, replacing the original communication satellites in the second communication satellite group by the N communication satellites, thereby realizing the updating of the second communication satellite group.
In this embodiment, the core network may establish a data table, where the number of each communication satellite and whether each communication satellite belongs to the first communication satellite group, the second communication satellite group, or neither the first communication satellite group nor the second communication satellite group are recorded in the data table, and update of the communication satellites in the first communication satellite group and the second communication satellite group is implemented by updating the classification of each communication satellite in the data table.
Through the process, each communication satellite in the first communication satellite group can be determined to have the largest elevation angle relative to the satellite terminal among the elevation angles of all the communication satellites relative to the satellite terminal; each communication satellite in the second communication satellite group has an elevation angle relative to the core network that is the largest of the elevation angles of all communication satellites relative to the core network. In the case where the communication satellites are all of the same type of communication satellite, such as all low-orbit satellites, the elevation angle is the largest, so that each communication satellite in the first communication satellite group has a shorter physical path with the satellite terminal than other communication satellites, and generally has a larger channel bandwidth, a larger average communication volume, a smaller communication overhead, a smaller queue length, and a lower propagation delay. Similarly, compared with other communication satellites, each communication satellite in the second communication satellite group has a shorter physical path with the core network, and generally has a larger channel bandwidth, a larger average communication traffic, a smaller communication overhead, a smaller queue length, and a lower propagation delay. Since the core network also continuously updates the first communication satellite group and the second communication satellite group by measuring the positions, each communication satellite in the first communication satellite group and the second communication satellite group can be continuously updated under the condition that the communication satellite and the satellite terminal are continuously moved, and the characteristics of a shorter physical path, a larger channel bandwidth, a larger average communication volume, a smaller communication overhead, a smaller queue length, a lower propagation delay and the like are continuously maintained.
In this embodiment, after detecting the trigger condition, the core network performs shortest route selection on a set formed by the first communication satellite group and the second communication satellite group, and initiates paging to the satellite terminal through a plurality of communication satellites determined by the shortest route selection. Specifically, the trigger condition may be that the core network receives downlink data sent by the data network. The process is shown in figure 3.
Referring to fig. 3, UE denotes a satellite terminal (User Equipment), gNb denotes a communication satellite to which the 5G technology is applied, DB denotes a Database (Database), AMF denotes an Access and Mobility Management Function (Access and Mobility Management Function), SMF denotes a Session Management Function (Session Management Function), UPF denotes a User Plane Function (User Plane Function), and DN denotes a Data Network (Data Network). Among them, DB, AMF, SMF and UPF belong to the components of the core network. The flow shown in fig. 3 is as follows:
1. the data network has downlink data to reach the UPF in the core network, which needs to be forwarded to the satellite terminal.
2. When the first Downlink Data arrives at the UPF, it becomes a trigger condition, and the UPF is triggered to send a Report message Downlink Data Report with Data arrival to the SMF. The UPF caches other downlink data until the session is restored, and forwards the data to the satellite terminal.
3. After receiving the data report from the UPF, the SMF returns a corresponding session report response to the UPF.
4. The SMF carries the PDU Session ID, UE representation, SUPI, SM, NAS information and N3 interface tunnel information which need to be recovered, and the contents are sent to the communication satellite and the satellite terminal through the AMF to recover the PDU Session.
5. The AMF returns a response to the SMF attempting the page.
6. AMF sends satellite terminal position request to user signed database
7. The database returns a response to the satellite terminal position request to the AMF.
8. The AMF takes out the position of the satellite terminal from a corresponding database, specifically, the AMF reads information such as the number of the communication satellite in the first communication satellite group and the second communication satellite group, calculates through a shortest path selection algorithm, selects a plurality of communication satellites to form a transmission link, and initiates paging to the satellite terminal through the transmission link. Accordingly, the gNB in fig. 3 can be regarded as a communication link that is composed of a plurality of communication satellites selected by the shortest routing algorithm from the first communication satellite group and the second communication satellite group.
In step 8, the shortest route selection algorithm used may be a dixtar algorithm, and when calculating the route, the physical distance between the communication satellites may be calculated according to parameters such as channel bandwidth, average communication traffic, communication overhead, queue length, propagation delay, and the like of the communication satellites in the first communication satellite group and the second communication satellite group, so as to apply the shortest route selection algorithm.
The principle of the world-wide integration convergence network in this embodiment is as follows: each communication satellite in the first communication satellite group has a shorter physical path with a larger channel bandwidth, a larger average communication volume, a smaller communication overhead, a smaller queue length and a lower propagation delay with the satellite terminal, and similarly, each communication satellite in the second communication satellite group has a shorter physical path with a larger channel bandwidth, a larger average communication volume, a smaller communication overhead, a smaller queue length and a lower propagation delay with the satellite terminal. Routing selection is performed on the communication satellites in the first communication satellite group and the second communication satellite group, which is equivalent to that the reliability of all available communication satellites is considered globally, so that on one hand, the advantages of obtaining the shortest topological path and the like of a routing algorithm can be exerted, and the characteristics of channel bandwidth, average communication traffic, communication overhead, queue length, propagation delay and the like of routing can be improved.
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 (9)
1. A world-wide integrated converged network, comprising:
a plurality of communication satellites;
a core network; the core network carries out routing selection on a set formed by a first communication satellite group and a second communication satellite group, and initiates paging to a satellite terminal through a plurality of communication satellites determined by the routing selection;
the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, the elevation angle of each communication satellite in the first communication satellite group relative to the core network is maximum, and the elevation angle of each communication satellite in the second communication satellite group relative to the satellite terminal is maximum.
2. The integrated sky-ground convergence network as claimed in claim 1, wherein the core network further obtains a real-time location of each of the communication satellites, and updates the communication satellites in the first communication satellite group according to the real-time location of each of the communication satellites.
3. The integrated sky-ground convergence network of claim 2, wherein the updating the communication satellites in the first communication satellite group according to the real-time location of each of the communication satellites comprises:
determining the elevation angle of each communication satellite relative to the core network according to the real-time position of each communication satellite;
screening out a plurality of communication satellites with the largest elevation angles;
replacing the communication satellites in the first communication satellite group with the screened plurality of communication satellites.
4. The integrated sky-ground convergence network according to any one of claims 1 to 3, wherein the core network further obtains a real-time location of each of the communication satellites and a real-time location of the satellite terminal, and updates the communication satellites in the second communication satellite group according to the real-time locations of the communication satellites and the real-time location of the satellite terminal.
5. The integrated sky-ground convergence network of claim 4, wherein the updating the communication satellites in the second communication satellite group according to the real-time position of each communication satellite and the real-time position of the satellite terminal comprises:
determining the elevation angle of each communication satellite relative to the satellite terminal according to the real-time position of each communication satellite and the real-time position of the satellite terminal;
screening out a plurality of communication satellites with the largest elevation angles;
replacing the communication satellite in the second communication satellite group with the screened plurality of communication satellites.
6. The integrated sky-ground convergence network as claimed in claim 1, wherein the initiating paging to the satellite terminal is triggered by a trigger condition.
7. The integrated heaven and earth convergence network of claim 6, wherein the triggering condition comprises: and the core network receives downlink data sent by the data network.
8. A paging method applied to a world-wide integrated convergence network, the world-wide integrated convergence network including a core network and a plurality of communication satellites, the paging method comprising:
the core network carries out routing selection on a plurality of communication satellites in a first communication satellite group and a second communication satellite group, and initiates paging to a satellite terminal through the communication satellites determined by the routing selection;
the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, each communication satellite in the first communication satellite group has the maximum elevation angle relative to the core network, and each communication satellite in the second communication satellite group has the maximum elevation angle relative to the satellite terminal.
9. A core network, wherein said core network is connected to a plurality of communications satellites; the core network carries out routing selection on a set formed by a first communication satellite group and a second communication satellite group, and initiates paging to a satellite terminal through a plurality of communication satellites determined by the routing selection; the first communication satellite group and the second communication satellite group respectively comprise at least one communication satellite, the elevation angle of each communication satellite in the first communication satellite group relative to the core network is maximum, and the elevation angle of each communication satellite in the second communication satellite group relative to the satellite terminal is maximum.
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| CN114189270B (en) * | 2021-10-25 | 2024-05-03 | 西安空间无线电技术研究所 | Satellite-borne gNB base station for deploying UPF and data processing method thereof |
| CN114095971A (en) * | 2022-01-19 | 2022-02-25 | 浙江吉利控股集团有限公司 | Method, system, device, equipment and storage medium for processing communication data packet |
| 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 |
| CN115915138A (en) * | 2022-11-14 | 2023-04-04 | 之江实验室 | Method for sharing 5G heaven-earth integrated network signaling interaction architecture |
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