CN116488704B - Beam switching method, system and storage medium for low orbit satellite - Google Patents
Beam switching method, system and storage medium for low orbit satellite Download PDFInfo
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
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- H04B7/185—Space-based or airborne stations; Stations for satellite systems
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Abstract
The application discloses a beam switching method, a system and a storage medium for a low-orbit satellite, which can be widely applied to the technical field of satellite communication. According to the method and the device, after the terminal position information and the terminal signaling surface interaction data in the beam coverage area in the first time period are obtained, the terminal distribution density in the beam coverage area in the first time period is determined according to the terminal position information, so that all terminals in the beam coverage area in the first time period can be switched in batches by comprehensively considering the terminal distribution density and the terminal signaling surface interaction data, the phenomenon that the terminals are switched in advance or switched in delay is effectively reduced, the stability of terminal communication is effectively improved, and the probability of signaling storm occurrence is reduced through the terminal signaling surface interaction data.
Description
Technical Field
The application relates to the technical field of satellite communication, in particular to a beam switching method, a system and a storage medium of a low-orbit satellite.
Background
In the scenario of using a low-orbit satellite for communication, since the low-orbit satellite has strong mobility and fast moving speed, and the coverage area of a satellite beam is continuously changed, the time for which the same terminal can receive services under the same beam is usually only tens of seconds to hundreds of seconds. When the terminal can not accept the service of the current beam any more, the next available beam is selected for switching. For each terminal in the beam, a command from the core network to switch is received before leaving the beam, which is very frequent for the core network. That is, for the core network and the satellites, handover-related operations are performed at any time in response to the service requirements of the terminal.
In the existing inter-satellite handover operation, the movement speed of the satellite is very fast, and the time for each satellite beam to serve the user may be only tens of seconds to hundreds of seconds, which may lead to frequent beam handover, so that the core network and the satellite need to constantly send handover messages and respond to the handover operation, which may cause a great burden on the whole communication system. Moreover, the estimation of the switching time only considers the relative positions of the satellite and the beam, and the premise is that the users are uniformly distributed, which can lead to delayed switching or advanced switching of part of the users, and for the region with the high user density, the simultaneous switching of too many terminals can also lead to signaling storm.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a beam switching method, a system and a storage medium for a low-orbit satellite, which can effectively improve the stability of terminal communication and reduce the probability of signaling storm occurrence.
In one aspect, an embodiment of the present application provides a beam switching method for a low-orbit satellite, including the following steps:
acquiring terminal position information and terminal signaling plane interaction data in a wave beam coverage range in a first time period;
determining the distribution density of the terminals in the beam coverage area in the first time period according to the terminal position information;
and carrying out batch switching on all terminals in the beam coverage area in the first time period according to the terminal distribution density and the terminal signaling plane interaction data, wherein the switching comprises switching beams serving all the terminals.
In some embodiments, the determining, according to the terminal location information, a terminal distribution density in a beam coverage area in the first period of time includes:
determining the number of terminals in the beam coverage area in the first time period according to the terminal position information;
acquiring a wave beam scanning area in the first time period;
and determining the distribution density of the terminals in the beam coverage area in the first time period according to the beam scanning area and the terminal number.
In some embodiments, the batch switching of all terminals in the beam coverage area in the first period according to the terminal distribution density and the terminal signaling plane interaction data includes:
when the distribution density of the terminals is smaller than or equal to a distribution density threshold value, performing batch switching on all terminals in a wave beam coverage range in the first time period once after the first time period;
and when the distribution density of the terminals is larger than the distribution density threshold, performing batch switching on all terminals in the beam coverage range in the first time period for one time or multiple times according to the interaction number of the signaling surfaces of the terminals.
In some embodiments, the performing batch switching on all terminals in the beam coverage area in the first period of time according to the terminal signaling plane interaction number includes:
determining the busy state of all terminals according to the terminal signaling surface interaction number, wherein the terminal signaling surface interaction number comprises signaling interaction times and the size of a sending data packet;
and carrying out batch switching on all terminals in the beam coverage range in the first time period for one time or multiple times according to the busy state.
In some embodiments, the performing, according to the busy state, one or more batch handovers for all terminals within the beam coverage area in the first period of time includes:
when the busy state does not reach a preset state, performing batch switching on all terminals in the beam coverage range in the first time period once;
and when the busy state reaches a preset state, determining the switching priority of all terminals, and performing batch switching for all terminals in the beam coverage range in the first time period for a plurality of times according to the switching priority.
In some embodiments, the performing batch switching on all terminals in the beam coverage area in the first period of time according to the terminal signaling plane interaction number includes:
determining the switching time length of each terminal according to the terminal signaling surface interaction number;
determining the switching priority of all terminals according to the switching duration;
and carrying out one or more batch switching on all terminals in the wave beam coverage range in the first time period according to the switching priority.
In some embodiments, the acquiring the terminal location information in the beam coverage area in the first period of time includes:
acquiring a first beam coverage area of a first time point and acquiring a second beam coverage area of a second time point;
determining the first time period according to the first time point and the second time point;
determining a beam scanning range in the first time period according to the first beam coverage and the second beam coverage;
and acquiring the terminal position information in the beam scanning range.
In another aspect, an embodiment of the present application provides a beam switching system of a low-orbit satellite, including:
the first module is used for acquiring terminal position information in a wave beam coverage range in a first time period and terminal signaling surface interaction data;
the second module is used for determining the distribution density of the terminals in the beam coverage range in the first time period according to the terminal position information;
and the third module is used for carrying out batch switching on all terminals in the beam coverage range in the first time period according to the terminal distribution density and the terminal signaling plane interaction data, wherein the switching comprises switching beams serving all the terminals.
In another aspect, an embodiment of the present application provides a beam switching system of a low-orbit satellite, including:
at least one memory for storing a program;
at least one processor for loading the program to perform the beam switching method of the low-orbit satellite described above.
In another aspect, an embodiment of the present application provides a computer storage medium in which a computer-executable program is stored, where the computer-executable program is executed by a processor to implement the beam switching method of the low-orbit satellite.
The beam switching method of the low-orbit satellite provided by the embodiment of the application has the following beneficial effects:
according to the method and the device, after the terminal position information and the terminal signaling surface interaction data in the beam coverage area in the first time period are obtained, the terminal distribution density in the beam coverage area in the first time period is determined according to the terminal position information, so that all terminals in the beam coverage area in the first time period can be switched in batches by comprehensively considering the terminal distribution density and the terminal signaling surface interaction data, the phenomenon that the terminals are switched in advance or switched in delay is effectively reduced, the stability of terminal communication is effectively improved, and the probability of signaling storm occurrence is reduced through the terminal signaling surface interaction data.
Additional aspects and advantages of the application 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 application.
Drawings
The application is further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a flowchart of a beam switching method of a low-orbit satellite according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a beam movement track according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an interactive system according to an embodiment of the present application;
fig. 4 is a schematic diagram of interaction of a 5G core network according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," 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 present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Before proceeding with the description of the specific embodiments, the terms involved in the embodiments of the present application are explained as follows:
5GC: the 5G core network is the core of the 5G mobile network. It establishes a reliable, secure network connection for the end user and provides access to its services. The core domain handles various basic functions in the mobile network, such as connectivity and mobility management, authentication and authorization, user data management and policy management, etc. The 5G core network functions are completely software-based and designed as cloud native, meaning that they are independent of the underlying cloud infrastructure, enabling higher deployment agility and flexibility.
UE: english is interpreted as User Equipment and Chinese is interpreted as User Equipment. The user device may be a cell phone, tablet, notebook or other device.
RAN: english is called Radio Access Network and Chinese is interpreted as radio access network. The system plays an interface role, and can lead a user to conveniently and economically enjoy various wide-screen multimedia information.
AMF: english is called Access and Mobility Management Function, chinese is interpreted as access and mobility management function network elements, and the functions include connection management, reachability management, mobility management, access authorization and the like.
NWDAF: english is called Network Data Analytics Function, chinese is interpreted as network data analysis network element, and is responsible for providing network analysis service according to the request data of network service in 5G core network element.
A low orbit satellite system generally refers to a large satellite system that can perform real-time information processing and is composed of a plurality of satellites, wherein the distribution of the satellites is called a satellite constellation. The low orbit satellite is mainly used for military target detection, and a high-resolution image of a target object is easily obtained by using the low orbit satellite. The low orbit satellite is also used for mobile phone communication, and the low orbit height of the satellite ensures short transmission delay and small path loss. Communication systems composed of multiple satellites can realize true global coverage, and frequency reuse is more efficient. Cellular communication, multiple access, spot beam, frequency multiplexing, etc. also provide technical support for low orbit satellite mobile communications.
The current beam switching method is to switch all terminals covered by the beam to the target beam at the same time. This manner of handover does not take into account the actual requirements of the terminals and may lead to early or late handover of these terminals. Advanced handoff does not affect the continuity of communication, but frequent handoff can result in reduced beam utilization. The delay switching may cause the terminal not to switch to the new available beam in time, so that on-off, packet loss, call drop, etc. of the communication are caused.
Based on this, referring to fig. 1, an embodiment of the present application provides a beam switching method for a low-orbit satellite, including but not limited to the following steps:
step S110, acquiring terminal position information and terminal signaling plane interaction data in a wave beam coverage range in a first time period;
in the embodiment of the application, since the low-orbit satellites are in the moving process, the positions of the transmission beams of the same low-orbit satellite at different time points are different. In this embodiment, after the first beam coverage of the first time point and the second beam coverage of the second time point are obtained, the first time period is determined according to the first time point and the second time point, and then the beam scanning range in the first time period is determined according to the first beam coverage and the second beam coverage; and acquiring terminal position information in a beam scanning range. Illustratively, as shown in fig. 2, the first beam coverage at the first point in time T1 is as shown by the solid ellipse of fig. 2; the second beam coverage at the second point in time T2 is elliptical as shown in dashed lines in fig. 2. The first time point is located before the second time point, that is, the first beam coverage area under the same low-orbit satellite moves to the second beam coverage area with time change, so that a part of terminals 210 in the first beam coverage area may not be able to communicate under the low-orbit satellite beam, that is, the terminals in the first time period T in fig. 2 may not be able to normally communicate under the low-orbit satellite beam at the second time point. Thus, communication may be performed by switching terminals within the first time period T to other low-orbit satellite beams.
Step S120, determining the distribution density of the terminals in the beam coverage area in a first time period according to the terminal position information;
in the embodiment of the application, the number of the terminals in the beam coverage area in the first time period can be determined according to the terminal position information, the beam scanning area in the first time period is obtained, and then the terminal distribution density in the beam coverage area in the first time period is determined according to the beam scanning area and the number of the terminals. As shown in fig. 2, after the first period T passes, the beam of the same satellite moves from the solid elliptical position to the dashed elliptical position, the area swept by the beam is the solid elliptical position corresponding to the first period T, and the number of terminals in the solid elliptical position is the number of terminals in the beam coverage area in the first period T. Based on this, the terminal distribution density of the first period=the solid elliptical position corresponding to the first period T/the number of terminals within the solid elliptical position.
And step S130, carrying out batch switching on all terminals in the beam coverage area in the first time period according to the terminal distribution density and the terminal signaling plane interaction data.
In the embodiment of the present application, the switching refers to switching the corresponding terminal from the beam corresponding to the first time point T1 to the beam corresponding to the second time point T2 covering the terminals. Illustratively, the first point in time covers the beam B1 of the terminal A1 and the second point in time covers the beam B2 of the terminal A1, and then the terminal communication procedure is switched from the beam B1 to the beam B2 at the second point in time.
In the embodiment of the application, as more terminals exist in a beam coverage area, the positions of all the terminals are not identical, and if all the terminals in the beam coverage area are switched together, partial terminals may be switched in advance or delayed. Based on this, the present embodiment divides the same beam range into a plurality of cells by one time T, one time T corresponding to one cell range. And then respectively carrying out switching treatment on the terminals in the cell.
In this embodiment, when performing handover processing on a terminal in a cell, the handover processing may be performed by comprehensively considering the distribution density of the terminal in the cell and the signaling plane interaction data corresponding to the terminal. Specifically, when the distribution density of the terminals is smaller than or equal to a distribution density threshold, performing batch switching on all terminals in a beam coverage area in a first time period after the first time period; and when the distribution density of the terminals is larger than the distribution density threshold, carrying out one or more batch switching on all the terminals in the beam coverage area in the first time period according to the interaction number of the signaling surfaces of the terminals. In this embodiment, the distribution density may be adjusted according to the actual situation, for example, for a terminal with frequent communication interaction, the distribution density may be set smaller; for terminals with little communication interaction, the distribution density can be set to be larger.
In the embodiment of the application, after the distribution density of the terminal is determined to be greater than the distribution density threshold, the terminal switching process in the cell can be further processed according to the interaction number of the signaling surface of the terminal. Specifically, the busy state of all terminals is determined according to the interaction number of the signaling surfaces of the terminals, and batch switching is performed on all terminals in the beam coverage range in the first time period for one or more times according to the busy state. It can be understood that the number of terminal signaling plane interactions includes the number of signaling interactions and the size of the transmission data packet. When the number of signaling interactions is greater than the number threshold or the size of the transmitted data packet is greater than the data packet threshold, the terminal may be determined to be a busy terminal. Therefore, in this embodiment, when the busy state does not reach the preset state, batch switching is performed on all terminals in the beam coverage area in the first period of time; and when the busy state reaches a preset state, determining the switching priority of all terminals, and carrying out batch switching on all terminals in the beam coverage range in the first time period for a plurality of times according to the switching priority. Illustratively, as shown in fig. 2, 8 terminals 210 are included within the first time period T. According to the interaction number of the signaling surfaces of the terminals, 4 terminals in the 8 terminals can be judged to be busy terminals (corresponding to the small solid ellipses), and the rest 4 terminals are not busy terminals (corresponding to the small hollow ellipses). And according to the judging result, setting the terminal switching priority corresponding to the small solid ellipse as a high priority, and setting the terminal switching priority corresponding to the small hollow ellipse as a low priority. Based on the priority setting, in the first time period T, the high-priority terminal is firstly switched to the beam covering the terminals at the second time point T2, and then the terminal corresponding to the low priority is switched to the beam covering the terminals at the second time point T2, so that the batch switching process is realized, and the situation of delayed switching or advanced switching is reduced. In the present embodiment, the setting of the priority is not limited to only these two priorities, and a plurality of priority levels may be set according to the actual size of the number of interactions of the signaling plane of the terminal.
In the embodiment of the application, when the terminal in one cell is subjected to the switching processing, the switching processing can be performed according to the distribution density of the terminal in the cell and the switching time of each terminal. Specifically, after determining that the distribution density of the terminals is greater than a distribution density threshold, determining the switching duration of each terminal according to the interaction number of the signaling surfaces of the terminals, and determining the switching priority of all the terminals according to the switching duration; and carrying out batch switching on all terminals in the beam coverage range in the first time period for one time or multiple times according to the switching priority. In this embodiment, each piece of signaling data contains an encrypted user ID, satellite number, satellite beam number, and the like. The terminal switching duration can be calculated by the formula (1):
Y i ＝aX i +b formula (1)
Wherein Y is i Indicating the switching time length of the ith terminal, X i The terminal signaling plane interaction number of the i-th terminal is represented, and a and b are constants.
Therefore, at any moment, knowing the number of interactive signaling, it can be determined whether the switching duration required by the terminal at that moment is higher than the average switching duration, if so, the terminal needs to perform switching operation preferentially to ensure enough time to complete switching, thereby avoiding the situation of delayed switching.
Taking the scenario shown in fig. 2 as an example, when the method of the present embodiment is applied to the interactive system composed of the modules shown in fig. 3, the method includes, but is not limited to, the following steps:
step one, a terminal position reporting module is used for reporting the terminal position covered by the wave beam to a core network;
step two, in a relative position visualization module, the change condition of the beam coverage after the moment T is displayed, and the relative condition of the position of the terminal and the beam coverage position at the moment T can be displayed;
step three, calculating the distribution density of the UE under the T1-T2 time interval according to the beam coverage and the distribution condition of the UE in a batch switching module: m = area swept by the beam in time interval T/number of terminals in time interval T;
setting a threshold value M of terminal distribution density in a batch switching module, wherein if M is less than M, the terminal density to be switched after the moment T is lower, and batch switching can be performed once; if M is greater than M, the terminal density to be switched after the time T is higher, the interaction condition of the terminals in the area on the signaling surface needs to be judged and counted, more resources (such as solid small ellipses in fig. 2) are allocated to the busy terminals according to the busyness of the terminals, a higher switching priority is given, the beam sweep terminal in the time T interval is subjected to batch switching for a plurality of times, and the switching operation starts from the time T1.
In some embodiments, when the method of the present embodiment is applied to the 5G core interaction process shown in fig. 4, the method includes, but is not limited to, the following steps:
in the case of satellite access, the AMF may initiate a location reporting procedure, requiring the RAN to report the UE geographical location to the AMF. The RAN may also report the coverage information to the AMF, such as ephemeris data.
Step two, the NWDAF sends a data subscription request to the AMF, wherein the data subscription request comprises position data of a terminal, interaction data of a signaling surface of the terminal, ephemeris data of a satellite and the like;
step three, AMF sends data to NWDAF, respond to NWDAF request;
step four, calculating the relative position of the beam and the terminal by using the data collected in the step three in the NWDAF;
step five, calculating corresponding terminal distribution density, the number of times of signaling interaction, the size of a transmitted data packet and the like according to the area swept by the satellite wave beam at the T time interval and the number of terminals under the coverage area in the step four, and executing a one-time batch switching strategy or a multiple-time batch switching strategy;
and step six, the NWDAF transmits the analysis result to the AMF and the UE, and notifies the UE to perform switching operation.
In summary, in this embodiment, by dividing a beam into a plurality of small partitions by using the time interval T, the terminals in the small partitions are regarded as a set, and on this basis, the distribution density of the terminals in the small partitions is considered, if the distribution density of the terminals is small, the resources occupied by the terminals in the small partitions are at a lower level no matter whether the service used is complex or not, and at this time, batch switching of all the terminals in the small partitions does not cause too much pressure on the satellite communication link, and the switching process can also be completed rapidly. If the distribution density of the terminals is high and the terminals include a plurality of terminals for performing complex communication services, such as navigation, surfing the internet, audio and video calls, etc., when the terminals are in handover, the terminals need to be very much data and signaling to be delivered, and a period of time may be required for performing operations such as handover and resource release, and if the terminals are in batch handover, the terminals may not complete the handover process for a long time and may cause communication interruption. Thus, terminals requiring more resources and handoff time are given higher handoff priorities, giving priority to such terminals for handoff.
Therefore, the method can reduce the problems of signaling storm and the like caused by the core network and the satellite link in the process of frequently switching the satellite beam by the terminal, and provides a high-efficiency and reliable switching method for the area with uneven user distribution. By comprehensively considering the requirements of all the user terminals, the user terminals can be ensured to maximize the utilization rate under one satellite beam, the situation of advanced switching does not occur, and the user can be ensured not to cause communication interruption due to delayed switching.
The embodiment of the application provides a beam switching system of a low-orbit satellite, which comprises the following components:
the first module is used for acquiring terminal position information in a wave beam coverage range in a first time period and terminal signaling surface interaction data;
the second module is used for determining the distribution density of the terminals in the beam coverage area in the first time period according to the terminal position information;
and the third module is used for carrying out batch switching on all terminals in the beam coverage area in the first time period according to the terminal distribution density and the terminal signaling plane interaction data, wherein the switching comprises the switching of the beams serving all the terminals.
The content of the method embodiment of the application is suitable for the system embodiment, the specific function of the system embodiment is the same as that of the method embodiment, and the achieved beneficial effects are the same as those of the method.
The embodiment of the application provides a beam switching system of a low-orbit satellite, which comprises the following components:
at least one memory for storing a program;
at least one processor for loading the program to perform the beam switching method of the low orbit satellite shown in fig. 1.
The content of the method embodiment of the application is suitable for the system embodiment, the specific function of the system embodiment is the same as that of the method embodiment, and the achieved beneficial effects are the same as those of the method.
An embodiment of the present application provides a computer storage medium in which a computer-executable program is stored, which when executed by a processor is configured to implement the beam switching method of the low-orbit satellite shown in fig. 1.
The content of the method embodiment of the application is applicable to the storage medium embodiment, the specific function of the storage medium embodiment is the same as that of the method embodiment, and the achieved beneficial effects are the same as those of the method.
Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions may be read from a computer-readable storage medium by a processor of a computer device, and executed by the processor, to cause the computer device to perform the beam switching method of the low-orbit satellite shown in fig. 1.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A method for beam switching in a low orbit satellite comprising the steps of:
acquiring terminal position information and terminal signaling plane interaction data in a wave beam coverage range in a first time period;
determining the distribution density of the terminals in the beam coverage area in the first time period according to the terminal position information;
performing batch switching on all terminals in a beam coverage area in the first time period according to the terminal distribution density and the terminal signaling plane interaction data, wherein the switching comprises switching beams serving all the terminals;
the determining, according to the terminal position information, the terminal distribution density in the beam coverage area in the first time period includes:
determining the number of terminals in the beam coverage area in the first time period according to the terminal position information;
acquiring a wave beam scanning area in the first time period;
and determining the distribution density of the terminals in the beam coverage area in the first time period according to the beam scanning area and the terminal number.
2. The method for beam switching of a low-orbit satellite according to claim 1, wherein the batch switching of all terminals in the beam coverage area in the first period according to the terminal distribution density and the terminal signaling plane interaction data comprises:
when the distribution density of the terminals is smaller than or equal to a distribution density threshold value, performing batch switching on all terminals in a wave beam coverage range in the first time period once after the first time period;
and when the distribution density of the terminals is larger than the distribution density threshold, performing batch switching on all terminals in the beam coverage range in the first time period for one time or multiple times according to the interaction number of the signaling surfaces of the terminals.
3. The method for beam switching of a low-orbit satellite according to claim 2, wherein the performing batch switching on all terminals in the beam coverage area in the first time period for one or more times according to the terminal signaling plane interaction number comprises:
determining the busy state of all terminals according to the terminal signaling surface interaction number, wherein the terminal signaling surface interaction number comprises signaling interaction times and the size of a sending data packet;
and carrying out batch switching on all terminals in the beam coverage range in the first time period for one time or multiple times according to the busy state.
4. The method for beam switching of a low-orbit satellite according to claim 3, wherein the performing batch switching on all terminals in the beam coverage area in the first period of time for one or more times according to the busy state comprises:
when the busy state does not reach a preset state, performing batch switching on all terminals in the beam coverage range in the first time period once;
and when the busy state reaches a preset state, determining the switching priority of all terminals, and performing batch switching for all terminals in the beam coverage range in the first time period for a plurality of times according to the switching priority.
5. The method for beam switching of a low-orbit satellite according to claim 2, wherein the performing batch switching on all terminals in the beam coverage area in the first time period for one or more times according to the terminal signaling plane interaction number comprises:
determining the switching time length of each terminal according to the terminal signaling surface interaction number;
determining the switching priority of all terminals according to the switching duration;
and carrying out one or more batch switching on all terminals in the wave beam coverage range in the first time period according to the switching priority.
6. The method for beam switching of a low-orbit satellite according to claim 1, wherein the acquiring the terminal position information in the beam coverage area in the first period of time comprises:
acquiring a first beam coverage area of a first time point and acquiring a second beam coverage area of a second time point;
determining the first time period according to the first time point and the second time point;
determining a beam scanning range in the first time period according to the first beam coverage and the second beam coverage;
and acquiring the terminal position information in the beam scanning range.
7. A beam switching system for a low orbit satellite, comprising:
the first module is used for acquiring terminal position information in a wave beam coverage range in a first time period and terminal signaling surface interaction data;
the second module is used for determining the distribution density of the terminals in the beam coverage range in the first time period according to the terminal position information;
a third module, configured to perform batch switching on all terminals in a beam coverage area in the first period according to the terminal distribution density and the terminal signaling plane interaction data, where the switching includes switching beams serving all the terminals;
the determining, according to the terminal position information, the terminal distribution density in the beam coverage area in the first time period includes:
determining the number of terminals in the beam coverage area in the first time period according to the terminal position information;
acquiring a wave beam scanning area in the first time period;
and determining the distribution density of the terminals in the beam coverage area in the first time period according to the beam scanning area and the terminal number.
8. A beam switching system for a low orbit satellite, comprising:
at least one memory for storing a program;
at least one processor configured to load the program to perform the beam switching method of a low orbit satellite according to any one of claims 1-6.
9. A computer storage medium, in which a computer executable program is stored, which when executed by a processor is adapted to implement the beam switching method of a low orbit satellite according to any one of claims 1-6.
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| US8331281B2 (en) * | 2007-10-03 | 2012-12-11 | The Mitre Corporation | Link supportability in a WCDMA communications system |
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