CN114531191A - Low-orbit satellite switching method, system, device and storage medium - Google Patents
Low-orbit satellite switching method, system, device and storage medium Download PDFInfo
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- CN114531191A CN114531191A CN202111508721.XA CN202111508721A CN114531191A CN 114531191 A CN114531191 A CN 114531191A CN 202111508721 A CN202111508721 A CN 202111508721A CN 114531191 A CN114531191 A CN 114531191A
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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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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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
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses a low-orbit satellite switching method, a system, a device and a storage medium, wherein the method comprises the following steps: acquiring first position information of a first satellite and second position information of a second satellite in a satellite network; determining a first inter-satellite routing set of a first satellite according to the first position information; determining a second inter-satellite routing set according to the second position information; acquiring first resource information of the first inter-satellite routing set and second resource information of the second inter-satellite routing set; determining an optimal route according to the first resource information and the second resource information; if the optimal inter-satellite route is sent by the second satellite, the first satellite is switched to the second satellite, and the method can improve the communication efficiency of the satellite. The method and the device can be widely applied to the technical field of satellite communication.
Description
Technical Field
The present application relates to the field of satellite communications technologies, and in particular, to a method, a system, an apparatus, and a storage medium for switching a low-earth-orbit satellite.
Background
At present, with the increasing maturity of the 5G technology, the development of Chinese 5G steadily advances. Due to the outstanding characteristics of high performance, low delay, high capacity and the like of the 5G, the 5G technology opens a new era of everything interconnection in the Internet and integrates multiple technologies such as artificial intelligence, big data and the like. But there are some limitations as a land mobile system. Due to economic and technical limits, land mobile communication services have wide-band communication problems of ships, airplanes and scientific research in remote areas such as oceans, forests, deserts and the like without coverage. The satellite network can solve the problem of the areas which can not be covered by the land mobile service, and the land mobile service is a favorable supplement for land mobile communication, so the combination of the 5G and the satellite network can greatly improve the network coverage. The high orbit satellite can only work in a crowded environment due to limited orbit resources, and the time requirement of services such as online video chat or games can not be met in about 500ms due to the large data transmission delay of the high orbit satellite. And low earth orbit satellites can greatly reduce data transmission delay. With the rapid development of modern mobile communication and electronic component technologies, the problems of restricting the communication quality, the data transmission rate, the use cost and the like of an early low-orbit satellite communication system are solved, and the application time of low-orbit satellite communication is mature. Due to high speed movement, the low earth orbit satellite system may have frequent handovers, which may result in communication interruption or a significant increase in communication delay if the handover is not to the proper link. In the related art, when performing handover, whether to perform handover may be determined according to RRC measurement, but in this handover manner, although a result of RRC measurement of a satellite after handover is relatively good, a link between satellites where the satellites are located may not reach a core network or a link between the satellites has poor quality, which may result in reduction of communication efficiency.
Rrc (radio Resource control): a radio resource control protocol.
Disclosure of Invention
The present application aims to solve at least to some extent one of the technical problems existing in the prior art.
Therefore, an object of the embodiments of the present invention is to provide a method, a system, an apparatus, and a storage medium for switching a low-earth-orbit satellite, in which the method can complete switching between satellites according to an optimal route, reduce RRC measurement results during satellite communication, and improve communication efficiency of the satellite.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the application comprises the following steps:
in a first aspect, an embodiment of the present application provides a low-earth-orbit satellite handover method, including the following steps:
acquiring first position information of a first satellite and second position information of a second satellite in a satellite network;
determining a first inter-satellite routing set of the first satellite according to the first position information; determining a second inter-satellite routing set for the second satellite based on the second location information;
acquiring first resource information of the first inter-satellite routing set and second resource information of the second inter-satellite routing set;
wherein the first resource information includes a first remaining communicable time of the first satellite and a first satellite average occupancy for each inter-satellite route in the first inter-satellite route set; the second resource information includes a second remaining communicable time of the second satellite and a second satellite average occupancy of each inter-satellite route in the second inter-satellite route set;
determining an optimal route according to the first resource information and the second resource information;
if the optimal inter-satellite route is sent by the second satellite, the first satellite switches to the second satellite.
In addition, according to the method for switching the low-earth orbit satellite of the embodiment of the invention, the following additional technical features can be provided:
further, in this embodiment of the present application, the determining an optimal route according to the first resource information and the second resource information specifically includes: acquiring the average occupancy rate of a first satellite and the average occupancy rate of a second satellite; according to the average occupancy rate of the first satellite, a first optimal route is obtained in the first inter-satellite route set; according to the average occupancy rate of the second satellite, a second optimal route is obtained in the second inter-satellite route set; determining an optimal route among the first optimal route and the second optimal route according to the first remaining communicable time and the second remaining communicable time.
Further, in this embodiment of the present application, the obtaining a first optimal route in the first inter-satellite route set according to the first average satellite occupancy specifically includes: acquiring the first satellite average occupancy rate of each inter-satellite route in the first inter-satellite route set; and comparing the average satellite occupancy rates of all the inter-satellite routes, and obtaining a first optimal route in the first inter-satellite route set.
Further, in this embodiment of the application, the determining an optimal route from the first optimal route and the second optimal route according to the first remaining communicable time and the second remaining communicable time specifically includes: acquiring first remaining communicable time and second remaining communicable time; determining an optimal satellite according to the first remaining communicable time and the second remaining communicable time; determining an optimal route from the first optimal route and the second optimal route according to the optimal satellite.
Further, in this embodiment of the present application, the obtaining the average satellite occupancy rate of each inter-satellite route in the first inter-satellite route set specifically includes: acquiring the number of satellites of each inter-satellite route in a first inter-satellite route set, the number of real-time users of each satellite and the maximum number of users of each satellite; obtaining the occupancy rate of each satellite in a first inter-satellite route set according to the real-time user number and the maximum user number; and obtaining the average satellite occupancy rate according to the satellite number of each inter-satellite route in the first inter-satellite route set and the occupancy rate of each satellite.
Further, in this embodiment of the application, the acquiring the first remaining communicable time specifically includes: acquiring a geocentric angle of a coverage area of a first satellite, a satellite angular velocity and communication time of the satellite; determining the maximum communication time of the first satellite according to the geocentric angle and the angular speed; and calculating the difference value between the maximum communication time and the satellite communication time to obtain the first residual communication time of the first satellite.
Further, in the embodiment of the present application, the method further includes: if the optimal inter-satellite route is sent for the first satellite, satellite switching is not performed.
On the other hand, an embodiment of the present application further provides a low-earth-orbit satellite handover system, including:
the first acquisition unit is used for acquiring first position information of a first satellite and second position information of a second satellite in a satellite network;
a second obtaining unit, configured to obtain first resource information of the first inter-satellite routing set and second resource information of the second inter-satellite routing set;
the first processing unit is used for determining a first inter-satellite routing set of a first satellite according to the first position information; determining a second inter-satellite routing set according to the second position information;
the second processing unit is used for determining the optimal route according to the first resource information and the second resource information;
and the third processing unit is used for judging whether the optimal inter-satellite route is sent out by the second satellite or not, generating a switching instruction and sending the switching instruction to the first satellite.
In another aspect, the present application further provides a low earth orbit satellite switching apparatus, including:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, the at least one program causes the at least one processor to implement a method for low earth orbit satellite handoff as described above.
In addition, the present application also provides a storage medium having stored therein processor-executable instructions, which when executed by a processor, are configured to perform a method for low-earth orbit satellite handover as described above.
Advantages and benefits of the present 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 present application:
according to the method and the device, all inter-satellite routes of the satellite can be determined through the position information of the satellite, the optimal route of the satellite is determined according to the average satellite occupancy rate of the inter-satellite routes and the remaining time of the satellite, the satellite is switched according to the optimal route, the situation that the RRC measurement result of a target satellite to be switched, which is sent by a terminal in the traditional satellite switching process, is good, but the target satellite after the satellite switching is finished can reach a core network without the inter-satellite routes or the quality of inter-satellite links is poor after the satellite switching is finished can be reduced, the invalid switching or the ineffective switching of the satellite can be reduced, and the communication efficiency of the satellite is improved.
Drawings
FIG. 1 is a schematic diagram illustrating a low earth orbit satellite handover method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of inter-satellite routing in an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a step of determining an optimal route according to the first resource information and the second resource information in an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a step of obtaining an average satellite occupancy rate of each inter-satellite route in a first inter-satellite route set according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a low earth orbit satellite switching system in an embodiment of the invention;
fig. 6 is a schematic structural diagram of a low earth orbit satellite switching apparatus according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings that illustrate principles and processes of a method, system, apparatus, and storage medium for low-earth-orbit satellite handoff in accordance with embodiments of the invention.
Referring to fig. 1, the present invention provides a low earth orbit satellite switching method, including the following steps:
s1, acquiring first position information of a first satellite and second position information of a second satellite in the satellite network;
in the embodiment of the present application, the first satellite and the second satellite are low-orbit satellites accessible by the ground terminal, the first position information may reflect the position of the first satellite in the entire low-altitude orbit, and similarly, the second position information may reflect the position of the second satellite in the entire low-altitude orbit, and for an entire satellite network composed of a plurality of satellites, after the low-orbit satellite is registered in the operation and control center, the operation and control center may obtain ephemeris data of the first satellite, the ephemeris data may be transmitted to the operation and control center in the form of a list, the operation and control center may obtain the real-time position of the first satellite through the list data, the operation and control center may plan an optimal route connecting the core network according to the first position information of the first satellite, the second position information of the second satellite, and resource information of all satellites in the entire satellite network, and specifically, refer to fig. 2, in fig. 2, the terminal may access the core network via an inter-satellite route between a first satellite and a second satellite, where the first satellite is in row 0, column 0 of the satellite matrix and may therefore be labeled as a first satellite S00, and the second satellite is in row 1, column 0 of the satellite matrix and may therefore be labeled as a second satellite; the second satellites S00 and S10, and S10 and S11 are disconnected for some reason, and the inter-satellite routes to the S10 of the first satellite S00 and the second satellite are S00-S01-S02-S03-gateway-5G core network, S00-S01-S11-S12-S13-gateway-5G core network, and S10-S20-S21-S22-S23-gateway-5G core network, respectively, so that the optimal inter-satellite route to the first satellite or the second satellite core network can be obtained by combining the resource information of the satellites S01, S02, S03, S01, S11, S12, S13, S20, S21, S22, and S23 uploaded in the satellite matrix.
S2, determining a first inter-satellite routing set of the first satellite according to the first position information; determining a second inter-satellite routing set for the second satellite based on the second location information;
specifically, in the embodiment of the present application, according to the position information of the first satellite and the position information of the second satellite, a first inter-satellite routing set and a second inter-satellite routing set may be obtained by using a breadth-first search algorithm; the Breadth-First Search algorithm (BFS) is a blind Search method that aims to systematically expand and examine all nodes in the graph for a result. In other words, it does not take into account the possible locations of the results and searches through the entire graph until a result is found.
S3, acquiring first resource information of the first inter-satellite routing set and second resource information of the second inter-satellite routing set;
in the embodiment of the present application, the first resource information may include a first remaining communicable time of the first satellite and a first satellite average occupancy rate of each inter-satellite route in the first inter-satellite route set; the second resource information may include a second remaining communicable time of the second satellite and a second satellite average occupancy for each inter-satellite route in the second inter-satellite route set; after the low-orbit satellite is registered in the operation and control center, the low-orbit satellite can periodically upload the resource information of the low-orbit satellite to the operation and control center, and the residual communicable time of the satellite and the occupancy rate of the satellite can reflect the communication quality of the satellite and the communication route in the satellite network.
S4, determining the best route according to the first resource information and the second resource information;
specifically, in the embodiment of the present application, the first remaining communicable time may be a communication time of the first satellite to the terminal, and the second remaining communicable time may be a communication time of the second satellite to the core network; the first average satellite occupancy may be an average satellite occupancy of respective inter-satellite routes in a first set of all inter-satellite routes in the satellite network including the first satellite; the second satellite average occupancy rate may be an average satellite occupancy rate of the respective inter-satellite routes in all the second inter-satellite route sets of the second satellite in the satellite network; according to the first satellite average occupancy rate, an inter-satellite route with the best communication quality can be obtained from a plurality of inter-satellite routes in the first inter-satellite route set; the occupancy rate of the satellite can reflect the communication quality of the satellite, and the inter-satellite link is composed of a plurality of satellites, and a first optimal route sent by a first satellite can be obtained according to the average occupancy rate; and obtaining a second optimal route with the best communication quality in the second inter-satellite route set according to the second satellite average occupancy rate. Based on the first remaining communicable time and the second remaining communicable time, the best low-earth-orbit communication satellite can be determined.
S5, if the optimal inter-satellite route is sent by the second satellite, the first satellite is switched to the second satellite. If the optimal route is determined to be sent by the second satellite, the operation and control center can generate a switching instruction and send the switching instruction to the first satellite, and the first satellite can perform satellite switching according to the switching instruction.
Further, referring to fig. 3, the determining an optimal route according to the first resource information and the second resource information may specifically include:
s41, acquiring the average occupancy rate of the first satellite and the average occupancy rate of the second satellite;
specifically, in the embodiment of the present application, the operation and control center may obtain the occupancy rates of all satellites in the satellite network according to the resource information periodically reported in the satellite network, where the first average satellite occupancy rate is the average occupancy rate of all routes in the first inter-satellite route set, and the second average satellite occupancy rate is the average occupancy rate of all routes in the second inter-satellite route set.
S42, according to the average occupancy rate of the first satellite, obtaining a first optimal route in the first inter-satellite route set;
specifically, in the embodiment of the present application, the average satellite occupancy of the first average satellite occupancy may reflect the average satellite occupancy of each inter-satellite route in the first inter-satellite route set, and which inter-satellite route in the first inter-satellite route set may be distinguished as the first optimal inter-satellite route according to the size of the average occupancy.
S43, according to the average occupancy rate of the second satellite, a second optimal route is obtained in the second inter-satellite route set;
specifically, in the embodiment of the present application, similar to the first average occupancy rate of the satellite, the second average occupancy rate of the satellite may reflect the average occupancy rate of the satellite in each inter-satellite route in the second inter-satellite route set, and which inter-satellite route in the second inter-satellite route set is the second best inter-satellite route may be distinguished according to the size of the average occupancy rate.
S44, determining an optimal route from the first optimal route and the second optimal route according to the first remaining communicable time and the second remaining communicable time;
specifically, in the present application, the first remaining communicable time may reflect a remaining communicable time of the first satellite and the second remaining communicable time may reflect a communicable time of the second satellite to be handed over, which satellite is an optimal communication satellite may be obtained by comparing the first remaining communicable time with the second communicable time, and an optimal route among all routes in the satellite network may be obtained by combining the first optimal route and the second optimal route obtained according to the average occupancy.
Further, referring to fig. 4, the average satellite occupancy rate of each inter-satellite route in the first inter-satellite route set is obtained; the method comprises the following steps:
s411, acquiring the number of satellites of each inter-satellite route in the first inter-satellite route set, the real-time user number of each satellite and the maximum user number of each satellite;
specifically, in the first inter-satellite route, the number of real-time users of each satellite and the maximum number of users of each satellite can be obtained from resource information periodically uploaded by the satellite, and the satellite average occupancy rate of each inter-satellite route can be obtained by combining the number of satellites of each inter-satellite route in the first inter-satellite route set.
S412, obtaining the occupancy rate of each satellite in the first inter-satellite route set according to the real-time user number and the maximum user number;
specifically, in the embodiment of the present application, the occupancy rate of each satellite is a ratio of the number of real-time users of each satellite to the maximum number of users of each satellite.
S413, obtaining the average satellite occupancy rate according to the satellite number of each inter-satellite route in the first inter-satellite route set and the occupancy rate of each satellite;
specifically, in the embodiment of the present application, the average occupancy rate of the satellites can be obtained by dividing the occupancy rate of each satellite of each inter-satellite route by the number of satellites of each inter-satellite route.
In addition, it should be noted that the method for acquiring the average satellite occupancy rate of each inter-satellite route in the second inter-satellite route set is the same as the method for acquiring the first inter-satellite route, and is not described herein again.
Further, the obtaining a first optimal route in the first inter-satellite route set according to the first average satellite occupancy may include the following steps:
s421, acquiring the satellite average occupancy rate of each inter-satellite route in the first inter-satellite route set;
specifically, in the embodiment of the present application, a plurality of first inter-satellite routing sets are initiated by the first satellite. The satellite base stations passing by each inter-satellite route along the way are different, and the route with the minimum occupancy rate can be obtained from a plurality of inter-satellite routes by obtaining the average occupancy rate of the first satellite.
S422, comparing the average satellite occupancy rates of all the inter-satellite routes, and obtaining a first optimal route in the first inter-satellite route set;
specifically, in the embodiment of the present application, comparing the average satellite occupancy rates of each route in the first inter-satellite route set may obtain the inter-satellite route with the minimum occupancy rate, where the inter-satellite route with the minimum average occupancy rate has the better communication quality, and the inter-satellite route with the minimum average occupancy rate may be used as the first optimal route.
In addition, it should be noted that the step "obtaining the second optimal route in the second inter-satellite route set according to the second average occupancy rate" in this document is the same as the specific step of obtaining the first optimal route in the first inter-satellite route set according to the first average occupancy rate, and is not described herein again.
Further, the determining an optimal route among the first optimal route and the second optimal route according to the first remaining communicable time and the second remaining communicable time may include the steps of:
s441, acquiring first remaining communicable time and second remaining communicable time;
specifically, in the present embodiment, the first remaining communicable time mainly includes the first satellite-to-satellite terminal remaining communicable time before the switching; the second remaining communicable time mainly includes a remaining communicable time from the second satellite to be switched to the core network;
s442, determining an optimal satellite according to the first remaining communicable time and the second remaining communicable time;
specifically, in the embodiment of the present application, after determining the first optimal route and the second optimal route, the first remaining communicable time and the second remaining communicable time need to be compared to determine the first optimal route or the second optimal route as the optimal route in the entire satellite network.
S443, determining an optimal route from the first optimal route and the second optimal route according to the optimal satellite.
Specifically, in the embodiment of the present application, instead of determining whether the satellite to be handed over is the best satellite only based on the RRC report initiated by the terminal, it is possible to obtain a satellite with the longest remaining communicable time between the first satellite and the second satellite as the optimal satellite by comparing the first remaining communicable time with the second remaining communicable time.
Further, referring to fig. 4, the acquiring the first remaining communicable time may include:
s4411, acquiring a geocentric angle of a coverage area of a first satellite, a satellite angular velocity and communication time of the satellite;
specifically, in the embodiment of the present application, the operation and control center may obtain the geocentric angle of the coverage area of the first satellite, the satellite angular velocity, and the communication time of the satellite through the periodically reported information. The maximum communication time of the satellite can be obtained according to the earth center angle of the coverage area and the angular speed of the satellite.
S4412, determining the maximum communication time of the first satellite according to the geocentric angle and the angular speed;
specifically, the maximum communication time of the first satellite can be calculated by the following formula:
wherein t ismaxFor maximum communication time, a is the coverage area geocentric angle, and w is the satellite angular velocity.
S4413, calculating a difference value between the maximum communication time and the satellite communication time to obtain a first remaining communicable time of the first satellite.
Specifically, in the embodiment of the present application, the first remaining communicable time of the first satellite may be obtained by referring to a calculation formula, which is as follows:
ts＝tmax-t；
where t is the communicated time tsTo remain communicable time, tmaxIs the maximum communication time.
Further, in some embodiments of the present application, further comprising: if the optimal inter-satellite route is sent out by the first satellite, satellite switching is not carried out; if the optimal route is determined through the steps and is the inter-satellite route sent by the first satellite, the original satellite communication is maintained, and the satellite switching is not executed.
Specifically, the following describes a satellite handover procedure with a first satellite as a source space base station and a second satellite as a target space base station as an example: wherein, the UE is a satellite communication terminal, the AMF, the SMF and the UPF are network elements of a core network, the AMF (access and Mobility Management function) is a Mobility Management function network element, the SMF (session Management function) is a session Management function network element, and the UPF (User plane function) is a User plane function network element; pfcp (packet Forwarding Control protocol) is a packet Forwarding Control protocol.
The satellite terminal initiates RRC measurement to the source space base station, the terminal reports a proper measurement report, and the source satellite base station finds that switching of the satellite base station is possible according to the reported measurement report. At this time, the source base station needs to send the IDs and IPs of the source base station and the target base station to the operation and control center, and the operation and control center can determine whether switching is needed according to the status of the source base station and the status between other target base stations to be switched; if the operation control center judges that switching can be needed, a switching instruction is sent to a source base station, the source base station sends a switching Request to a target base station after receiving the switching instruction, the target base station carries out terminal admission judgment after receiving the switching Request, if the terminal switching is allowed, wireless resources including temporary identifications and the like are distributed to satellite terminal UE according to quality of service (QosFlow) to be established, meanwhile, a response instruction (Handover Request acknowledgement) is sent to the source base station, base station switching preparation is completed, and meanwhile, the establishment of logic channels among base stations is completed; after the switching is started, the source base station sends a switching command to the terminal through the RCC message and stops sending downlink data; meanwhile, the last satellite base station of the inter-satellite link connecting the source base station and the core network, which can be connected with the network element AMF of the core network, can initiate a path switch request to the network element AMF, after receiving the request, the network element AMF can send an http message to the network element SMF and carry MAC48 addresses of the source space base station and the target space base station, and after receiving the sent http message, the network element SMF sends a session modification request of a PFCP protocol to the network element UPF, so that the addresses of the source space base station and the target space base station are transmitted to the UPF; and the UPF sends a response of the session modification request to the SMF, and the network element SMF completes the address switching of the source space base station and the destination space base station according to the response.
In addition, referring to fig. 5, corresponding to the method of fig. 1, an embodiment of the present application further provides a low-earth satellite handover system, which may include:
the first acquisition unit is used for acquiring first position information of a first satellite and second position information of a second satellite in a satellite network;
a second obtaining unit, configured to obtain first resource information of the first inter-satellite route set and second resource information of the second inter-satellite route set;
the first processing unit is used for determining a first inter-satellite routing set of a first satellite according to the first position information; determining a second inter-satellite routing set according to the second position information;
the second processing unit is used for determining an optimal route according to the first resource information and the second resource information;
and the third processing unit is used for judging whether the optimal inter-satellite route is sent by the second satellite or not, generating a switching instruction and sending the switching instruction to the first satellite.
Corresponding to the method in fig. 1, an embodiment of the present application further provides a low-earth-orbit satellite switching apparatus, whose specific structure can be referred to fig. 6, including:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is caused to implement the low-earth-orbit satellite switching method.
The contents in the above method embodiments are all applicable to the present apparatus embodiment, the functions specifically implemented by the present apparatus embodiment are the same as those in the above method embodiments, and the advantageous effects achieved by the present apparatus embodiment are also the same as those achieved by the above method embodiments.
In correspondence with the method of fig. 1, an embodiment of the present application further provides a storage medium having stored therein processor-executable instructions, which when executed by a processor, are configured to perform the method for low-earth-orbit satellite handover.
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 flowcharts of the present application are provided by way of example in order to provide a more comprehensive 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.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable programs that can be considered for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with a program execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the programs from the program execution system, apparatus, or device and execute the programs. 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 program execution system, apparatus, or device.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means 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 application. In this specification, schematic representations of the above terms 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 present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
While the present application has been described with reference to the preferred embodiments, 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 low-earth-orbit satellite switching method is characterized by comprising the following steps:
acquiring first position information of a first satellite and second position information of a second satellite in a satellite network;
determining a first inter-satellite routing set of the first satellite according to the first position information; determining a second inter-satellite routing set for the second satellite based on the second location information;
acquiring first resource information of the first inter-satellite routing set and second resource information of the second inter-satellite routing set;
wherein the first resource information includes a first remaining communicable time of the first satellite and a first satellite average occupancy for each inter-satellite route in the first inter-satellite route set; the second resource information includes a second remaining communicable time of the second satellite and a second satellite average occupancy of each inter-satellite route in the second inter-satellite route set;
determining an optimal route according to the first resource information and the second resource information;
if the optimal inter-satellite route is sent by the second satellite, the first satellite switches to the second satellite.
2. The method of claim 1, wherein the determining the optimal route according to the first resource information and the second resource information specifically comprises:
acquiring the average occupancy rate of a first satellite and the average occupancy rate of a second satellite;
according to the average occupancy rate of the first satellite, a first optimal route is obtained in the first inter-satellite route set;
according to the average occupancy rate of the second satellite, a second optimal route is obtained in the second inter-satellite route set;
determining an optimal route among the first optimal route and the second optimal route according to the first remaining communicable time and the second remaining communicable time.
3. The method of claim 2, wherein the obtaining a first optimal route in the first inter-satellite route set according to the first average satellite occupancy includes:
acquiring the first satellite average occupancy rate of each inter-satellite route in the first inter-satellite route set;
and comparing the average satellite occupancy rates of all the inter-satellite routes, and obtaining a first optimal route in the first inter-satellite route set.
4. The method according to claim 2, wherein the determining an optimal route from the first optimal route and the second optimal route according to the first remaining communicable time and the second remaining communicable time comprises:
acquiring first remaining communicable time and second remaining communicable time;
determining an optimal satellite according to the first remaining communicable time and the second remaining communicable time;
determining an optimal route from the first optimal route and the second optimal route according to the optimal satellite.
5. The method for switching between low earth orbit satellites according to claim 3, wherein the obtaining of the average satellite occupancy rate of each inter-satellite route in the first inter-satellite route set specifically includes:
acquiring the number of satellites of each inter-satellite route in a first inter-satellite route set, the number of real-time users of each satellite and the maximum number of users of each satellite;
obtaining the occupancy rate of each satellite in a first inter-satellite route set according to the real-time user number and the maximum user number;
and obtaining the average satellite occupancy rate according to the satellite number of each inter-satellite route in the first inter-satellite route set and the occupancy rate of each satellite.
6. The method according to claim 4, wherein the obtaining the first remaining communicable time specifically comprises:
acquiring a geocentric angle of a coverage area of a first satellite, a satellite angular velocity and communication time of the satellite;
determining the maximum communication time of the first satellite according to the geocentric angle and the angular speed;
and calculating the difference value between the maximum communication time and the communication time of the satellite to obtain a first residual communication-capable time of the first satellite.
7. The method of claim 1, further comprising: and if the optimal inter-satellite route is sent out by the first satellite, not switching the satellites.
8. A low earth orbit satellite handoff system, comprising:
the first acquisition unit is used for acquiring first position information of a first satellite and second position information of a second satellite in a satellite network;
a second obtaining unit, configured to obtain first resource information of the first inter-satellite routing set and second resource information of the second inter-satellite routing set;
the first processing unit is used for determining a first inter-satellite routing set of a first satellite according to the first position information; determining a second inter-satellite routing set according to the second position information;
the second processing unit is used for determining the optimal route according to the first resource information and the second resource information;
and the third processing unit is used for judging whether the optimal inter-satellite route is sent out by the second satellite or not, generating a switching instruction and sending the switching instruction to the first satellite.
9. A low earth orbit satellite switching apparatus, comprising:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement a method for low-earth-orbit satellite handoff as claimed in any one of claims 1-7.
10. A storage medium having stored therein processor-executable instructions, which when executed by a processor, are configured to perform a method for low-earth-orbit satellite handoff as claimed in any one of claims 1-7.
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