CN108337710B - Method and system based on high-low orbit satellite communication - Google Patents
Method and system based on high-low orbit satellite communication Download PDFInfo
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- CN108337710B CN108337710B CN201711445625.9A CN201711445625A CN108337710B CN 108337710 B CN108337710 B CN 108337710B CN 201711445625 A CN201711445625 A CN 201711445625A CN 108337710 B CN108337710 B CN 108337710B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
Abstract
The invention discloses a method and a system based on high-low orbit satellite communication, which comprises a high-orbit satellite and N low-orbit satellites; the N low-orbit satellites are used for collecting and receiving event information in respective coverage areas and reporting service information of the event information to the high-orbit satellites; and the high-orbit satellite is used for distributing and matching the service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain. According to the invention, through an inter-satellite communication resource cooperation management mode, cooperation operation of wide area information acquisition and distribution is realized among high and low orbit satellites, an inter-satellite resource storage and unloading mode is provided, cooperation storage and distributed unloading of the inter-high and low orbit satellites are realized, the inter-satellite resource scheduling efficiency and utilization rate are improved, and the inter-satellite resource calculation delay is reduced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system based on high and low orbit satellite communication.
Background
With the development of technologies such as aerospace communication and cloud computing, communication space has been extended to higher space. In the prior art, due to the limitations of the spacecraft technology and the application environment, various resources (energy resources, computing resources and communication resources) on the spacecraft are very limited, and the utilization rate is low. The high dynamics of the inter-satellite links and the satellite nodes cause the network topology to change periodically. The system equipment has different functions, and can be a simple sensor system or an on-board computer system capable of completing calculation and processing. In addition, different satellite systems also vary widely in storage or communication facilities. In addition, the difference in the orbits of the network nodes makes it possible for the communication distance between the nodes to reach thousands of kilometers (e.g., the communication distance between a medium-orbit satellite and a low-orbit satellite having an orbit height of ten thousand kilometers), and thus the time delay for transmitting data and instructions between the network nodes of the space satellite is greater than the time delay between the nodes of the ground network. The original communication network technology mainly based on the voice paging service cannot meet the requirement of multiple services, so that the research of the cooperation technology of the high and low orbit satellites becomes a key point.
Disclosure of Invention
The invention provides a method and a system based on high and low orbit satellite communication, which are used for solving the problems of large time delay of data and instructions transmitted between satellite network nodes and low resource utilization rate on a spacecraft in the prior art.
According to an aspect of the present invention, there is provided a method for high-low orbit satellite based communication, including:
n low-orbit satellites collect and receive event information in respective coverage areas, and report service information of the event information to the high-orbit satellites, wherein N is a positive integer;
and the high-orbit satellite distributes and matches the service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain.
Optionally, the method further includes:
the high-orbit satellite acquires and receives the event information which is not within the coverage area of the N low-orbit satellites.
Optionally, the acquiring and receiving the event information that is not within the coverage area of the N low-orbit satellites by the high-orbit satellite comprises:
and the high-orbit satellite distributes and matches the service information of the event information which is not in the coverage area of the N low-orbit satellites to the low-orbit satellite in the high-orbit satellite management domain or the high-orbit satellite outside the high-orbit satellite management domain.
Optionally, the method further includes:
the high-orbit satellite controls the storage of the service information of the N low-orbit satellites in the management domain.
Optionally, the controlling, by the high-orbit satellite, the storage of the service information of the N low-orbit satellites in the management domain includes:
the N low-orbit satellites identify and read the service information in the coverage areas of the N low-orbit satellites, extract hot service information, store the hot service information and report the hot service information to the high-orbit satellites;
and the high orbit satellite extracts and stores the hottest service information which is the hottest in the hottest service information reported by each low orbit satellite.
Optionally, the method further includes:
the high-orbit satellite controls the unloading of the service information of the N low-orbit satellites in the management domain.
Optionally, the offloading of the service information of the N low-orbit satellites in the management domain controlled by the high-orbit satellite includes:
the high-orbit satellite receives the service information to be processed reported by the N low-orbit satellites;
if the service information to be processed by the N low-orbit satellites contains the same service information, the high-orbit satellite controls the N low-orbit satellites to unload the same service information to the high-orbit satellite;
and the high-orbit satellite distributes and matches the same service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain.
Optionally, the offloading of the service information of the N low-orbit satellites in the management domain controlled by the high-orbit satellite includes:
the high-orbit satellite receives the calculation load quantity reported by the N low-orbit satellites and the service information to be processed;
and the high-orbit satellite controls the low-orbit satellite with large calculation capacity to unload the service information to be processed and transmit the service information to the low-orbit satellite with small calculation capacity according to the calculation capacity of each low-orbit satellite.
Optionally, the control plane and the service plane of the high-orbit satellite and the low-orbit satellite are separated.
According to another aspect of the present invention, there is provided a system for high-low earth orbit satellite based communication, the system comprising a high earth orbit satellite and N low earth orbit satellites;
the N low-orbit satellites are used for collecting and receiving event information in respective coverage areas and reporting service information of the event information to the high-orbit satellites;
and the high-orbit satellite is used for distributing and matching the service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain.
The invention has the beneficial effects that:
through an inter-satellite communication resource cooperation management mode, cooperation operation of wide area information acquisition and distribution is achieved among high and low orbit satellites, an inter-satellite resource storage and unloading mode is provided, cooperation storage and distributed unloading of the high and low orbit satellites are achieved, inter-satellite resource scheduling efficiency and utilization rate are improved, and inter-satellite resource calculation time delay is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a communication diagram of a high and low earth orbit satellite according to the present invention.
In the figure: 1-high orbit satellite, 2-low orbit satellite.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It should be noted that, in fig. 1, the ellipse represents a region of the coverage area of the low orbit satellite, and the hexagon and the pentagon each represent a region that is not within the coverage area of any low orbit satellite.
In a first embodiment of the present invention, a method for high-low orbit satellite based communication is provided, which includes:
the method comprises the steps that N low-orbit satellites 2 collect and receive event information in respective coverage areas, service information of the event information is reported to the high-orbit satellites 1, and N is a positive integer. Event information is generally considered to be an emergency event, such as when a requester wishes to know the relevant information of a receiver, the requester initiates the relevant requested information to the satellite in the area in which the requester is located. The service information is content describing a service to be performed by the event information.
And the high orbit satellite 1 distributes and matches the service information to a low orbit satellite 2 in the management domain of the high orbit satellite 1 or a high orbit satellite 1 outside the management domain of the high orbit satellite 1. In a preferred embodiment:
when the requester and the receiver of the service information are respectively located in the coverage areas of two low-orbit satellites 2 and the two low-orbit satellites 2 are simultaneously located in the management domain of the same high-orbit satellite 1, the high-orbit satellite 1 distributes and matches the service information to the low-orbit satellite 2 corresponding to the receiver in the management domain of the high-orbit satellite 1, and the low-orbit satellite 2 corresponding to the receiver sends the service information to the receiver.
When the requester of the service information is in the coverage area of a low earth orbit satellite, and both the low earth orbit satellite 2 corresponding to the requester and the receiver not belonging to any low earth orbit satellite 2 are in the management domain of the same high earth orbit satellite 1, the high earth orbit satellite 1 directly distributes and matches the service information to the receiver.
When the requester and the receiver of the service information are respectively located in the coverage areas of two low-orbit satellites 2, and the two low-orbit satellites 2 are respectively located in the management areas of different high-orbit satellites 1, the high-orbit satellite 1 distributes and matches the service information to the high-orbit satellite 1 corresponding to the receiver outside the management area of the high-orbit satellite 1, the high-orbit satellite 1 corresponding to the receiver can send the service information to the low-orbit satellite 2 corresponding to the receiver, and the low-orbit satellite 2 sends the service information to the receiver.
The invention does not make a unique limitation on the satellite regions in which the requester and the receiver are located.
Optionally, the control plane and the service plane of the high-orbit satellite 1 and the low-orbit satellite 2 are separated, so that the programmable and centralized forwarding control of network functions is realized, the high-orbit satellite and the low-orbit satellite have the characteristics of flexibility, dynamics and support of various service requirements, network resources such as service information are sensed and scheduled from a global view through a network control platform, and the programmable network connection is realized. The existence of a large number of different data layers provides a possibility to unify and simplify the configuration work of different resources. Effectively enhancing the sharing of resources and making the network control more flexible and intelligent.
In a second embodiment of the present invention, a method for high-low orbit satellite based communication is provided, which includes:
the high orbit satellite 1 collects and receives the event information which is not within the coverage area of the N low orbit satellites 2.
Optionally, the acquiring and receiving the event information that is not within the coverage area of the N low-orbit satellites 2 by the high-orbit satellite 1 includes:
the high-orbit satellite 1 distributes and matches the service information of the event information which is not in the coverage area of the N low-orbit satellites 2 to the low-orbit satellite 2 in the management domain of the high-orbit satellite 1 or the high-orbit satellite 1 outside the management domain of the high-orbit satellite 1. In a preferred embodiment of the invention:
when a receiving party is located in the coverage area of one low earth orbit satellite 2 in the management domain of the high earth orbit satellite 1, the high earth orbit satellite 1 collects and receives event information initiated by a requesting party which is not located in the coverage area of any low earth orbit satellite 2, the high earth orbit satellite 1 distributes and matches the service information of the event information to the low earth orbit satellite 2 where the receiving party is located in the management domain of the high earth orbit satellite 1, and the low earth orbit satellite 2 sends the service information to the receiving party.
When a receiving party is not located in any low orbit satellite 2 in the management domain of the high orbit satellite 1, the high orbit satellite 1 collects and receives event information initiated by a requesting party which is not located in the coverage area of any low orbit satellite 2, the high orbit satellite 1 directly distributes and matches service information of the event information to the receiving party in the management domain of the high orbit satellite 1, a hexagon in the figure 1 can represent a region where the requesting party is located (the region does not belong to the coverage area of any low orbit satellite), and a pentagon can represent a region where the receiving party is located (the region does not belong to the coverage area of any low orbit satellite).
When the receiving party is in the management domain of a high orbit satellite 1 outside the management domain of the high orbit satellite 1, the high orbit satellite 1 distributes and matches the service information of the event information initiated by the requesting party which is not in the coverage area of any low orbit satellite 2 to the high orbit satellite 1 outside the management domain of the high orbit satellite 1, and the high orbit satellite 1 where the receiving party is located distributes and matches the service information to the receiving party.
The invention is not limited to the satellite region in which the requester and the receiver are located.
Optionally, the control plane and the service plane of the high-orbit satellite 1 and the low-orbit satellite 2 are separated, so as to implement programmable and centralized forwarding control of network functions, so that the high-orbit satellite 1 and the low-orbit satellite 1 have characteristics of flexibility, dynamics and support of various service requirements, and network resources such as service information are sensed and scheduled from a global perspective through a network control platform, thereby implementing programmable network connection. The existence of a large number of different data layers provides a possibility to unify and simplify the configuration work of different resources. Effectively enhancing the sharing of resources and making the network control more flexible and intelligent.
In a third embodiment of the present invention, a method for high-low orbit satellite based communication is provided, which includes:
the high-orbit satellite 1 controls the storage of the service information of the N low-orbit satellites 2 in its management domain.
Optionally, the controlling, by the high-orbit satellite 1, the storage of the service information of the N low-orbit satellites 2 in the management domain thereof includes:
the N low orbit satellites 2 identify and read the service information in the coverage area of each low orbit satellite, extract hot service information, store the hot service information and report the hot service information to the high orbit satellite 1; the invention classifies the service information with high hit rate or frequently initiated service information as hot service information.
And the high orbit satellite 1 extracts and stores the hottest service information which is the hottest in the hottest service information reported by each low orbit satellite 2. Namely, the high earth orbit satellite 1 classifies the hot service information with high hit rate or frequently initiated in the received hot service information as the hot service information with the hottest and stores the hot service information. When the requesters in other areas request to inquire the relevant service information of the receiver in the area, if the service information is hot service information, the high-orbit satellite 1 or the low-orbit satellite 2 does not need to perform the process of acquiring the service information again, and the stored hot service information is directly forwarded, so that the purpose of reducing the time delay is achieved.
In a fourth embodiment of the present invention, a method for high-low orbit satellite based communication is provided, which includes:
when the service information of the event information initiated by the requester arrives, the low orbit satellite 2 identifies and reads the service information, and reports the extracted hot service information list to the high orbit satellite 1. The high orbit satellite 1 judges that the hottest service information which is the hottest is stored in the high orbit satellite 1 according to the condition of the hottest service information stored in the plurality of low orbit satellites 2. Information for local hot traffic information listed for the low earth orbit satellite 2, rather than global hot traffic information, is stored only at the low earth orbit satellite 2. In this way, global storage optimization is achieved in combination with local storage optimization.
Preferably, the high-orbit satellite 1 and the low-orbit satellite 2 both store the hottest service information and the hottest service information of the hottest in the respective on-satellite mobile edge computing storage servers, and when a requester in other areas requests to query the relevant service information of a receiver in the area, if the service information is the hottest service information, the high-orbit satellite 1 or the low-orbit satellite 2 does not perform the process of acquiring the service information or the relevant communication data again, and directly forwards the hottest service information stored in the on-satellite mobile edge computing storage server, so as to achieve the purpose of reducing the time delay.
Meanwhile, in a preferred embodiment, an SDN technology is used in an inter-satellite network system, and a control plane and a service plane of the high-orbit satellite 1 and the low-orbit satellite 2 are separated, so that programmability and centralized forwarding control of network functions are realized, characteristics of flexibility, dynamics and support of various service requirements are provided between the high-orbit satellite and the low-orbit satellite, and network resources such as service information are sensed and scheduled from a global perspective through a network control platform, so that programmability of network connection is realized. The existence of a large number of different data layers provides a possibility to unify and simplify the configuration work of different resources. Effectively enhancing the sharing of resources and making the network control more flexible and intelligent. The control surface of the high-orbit satellite 1 is in a master-slave relationship, and the control surface of the high-orbit satellite 1 is in charge of global control, and the control surface of the high-orbit satellite 1 controls the cooperative storage of service information between the high-orbit satellite and the low-orbit satellite; the control plane of the low orbit satellite 2 only identifies and reads the self service information, extracts the hot service information, and reports the hot service information to the high orbit satellite 1.
In the inter-satellite network system provided by the embodiment, the SDN and edge computing technologies are used, so that different network functions form a complete logic network, each logic network can meet the requirements of corresponding services according to specific network characteristics, and through network function and protocol customization, network slices provide matched network functions for different service scenes, thereby saving cost.
In a fifth embodiment of the present invention, a method for high-low orbit satellite based communication is provided, which includes:
the high orbit satellite 1 controls the unloading of the service information of the N low orbit satellites 2 in the management domain, reduces the processing time delay of the service information among the satellites, reports the service information to be processed and the condition of self-calculated load capacity by the low orbit satellite 2, and is controlled globally by the high orbit satellite 1. Whether or not centralized processing is performed in the high-orbit satellite 1 and then distributed, or cooperative calculation processing is performed among a plurality of low-orbit satellites 2 is determined.
Optionally, the step of the high-orbit satellite 1 controlling the offloading of the service information of the N low-orbit satellites 2 in its management domain includes:
the high orbit satellite 1 receives the service information to be processed reported by the N low orbit satellites 2;
if the service information to be processed by the N low-orbit satellites 2 contains the same service information, the high-orbit satellite 1 controls the N low-orbit satellites 2 to unload the same service information to the high-orbit satellite 1;
and the high-orbit satellite 1 distributes and matches the same service information to a low-orbit satellite 2 in the management domain of the high-orbit satellite 1 or a high-orbit satellite 1 outside the management domain of the high-orbit satellite 1.
Optionally, the step of the high-orbit satellite 1 controlling the offloading of the service information of the N low-orbit satellites 2 in its management domain includes:
the high-orbit satellite 1 receives the calculation load amount reported by the N low-orbit satellites 2 and the service information to be processed;
and the high-orbit satellite 1 controls the low-orbit satellite 2 with large calculation load to unload the service information to be processed and transmit the service information to the low-orbit satellite 2 with small calculation load according to the calculation load of each low-orbit satellite 2.
In a preferred embodiment, the SDN technology is used in the inter-satellite network system, the control plane and the service plane of the high-orbit satellite 1 and the low-orbit satellite 2 are separated, network slices can be defined according to any standard according to needs, and service instantiation is realized through an SDN architecture. The programmable and centralized forwarding control of network functions is realized, the characteristics of flexibility, dynamic and supporting various service requirements are realized between high and low orbit satellites, network resources such as service information are sensed and scheduled from a global view through a network control platform, and the programmable network connection is realized. The existence of a large number of different data layers provides a possibility to unify and simplify the configuration work of different resources. Effectively enhancing the sharing of resources and making the network control more flexible and intelligent. The control surface of the high-orbit satellite and the low-orbit satellite is in a master-slave relationship, the control surface of the high-orbit satellite 1 is in charge of global control, and the control surface of the high-orbit satellite 1 controls the unloading cooperation of service information between the high-orbit satellite and the low-orbit satellite; the control plane of the low-orbit satellite 2 only identifies and reads the self service information, and unloads the same service information in the service information to be processed to the high-orbit satellite 1.
In a sixth embodiment of the present invention, a method for high-low orbit satellite based communication is provided, which includes:
for a service with high computational complexity, a single low earth orbit satellite 2 may have long processing time and high processing delay, and is difficult to meet the service requirement. At this time, based on the master-slave control relationship of the control plane of the high and low orbit satellites in the fifth embodiment, the low orbit satellite 2 may report the traffic information and/or the calculation load amount to be processed to the high orbit satellite 1:
1) after receiving the service information to be processed of the plurality of low orbit satellites 2, the high orbit satellite 1:
if the service information to be processed by the plurality of low-orbit satellites 2 contains the same service information, the high-orbit satellite 1 controls the plurality of low-orbit satellites to unload the same service information to the high-orbit satellite 1, the high-orbit satellite 1 performs centralized processing, and the high-orbit satellite 1 distributes the processed information to each low-orbit satellite 2 or other high-orbit satellites 1; meanwhile, each low earth orbit satellite 2 processes the service information of the non-identical part thereof respectively; and finally, the low-orbit satellite 2 combines the service information processed by the high-orbit satellite 1 with the processing result of the service information processed by the low-orbit satellite to obtain a final processing result.
2) After the high-orbit satellite 1 receives the calculated load amount reported by the low-orbit satellites 2 and the service information to be processed:
if the difference of the calculated load among the low-orbit satellites 2 is large, the high-orbit satellite 1 performs a targeted load balancing algorithm according to the calculated load of each low-orbit satellite 2, and controls the low-orbit satellite 2 with large calculated load to unload the service information to be processed and transmit the service information to the low-orbit satellite 2 with small calculated load, so that the idle low-orbit satellite 2 is fully utilized to process service information resources, and the efficient calculation of the service information is realized.
In a seventh embodiment of the present invention, there is provided a system based on high-low earth orbit satellite communication, the system comprising a high earth orbit satellite 1 and N low earth orbit satellites 2;
the N low-orbit satellites 2 are used for collecting and receiving event information in respective coverage areas and reporting service information of the event information to the high-orbit satellite 1;
the high-orbit satellite 1 is configured to distribute and match the service information to a low-orbit satellite 2 in a management domain of the high-orbit satellite 1 or a high-orbit satellite 1 outside the management domain of the high-orbit satellite 1.
Optionally, the high-orbit satellite 1 acquires and receives the event information which is not within the coverage area of the N low-orbit satellites 2; the high-orbit satellite 1 distributes and matches the service information of the event information which is not in the coverage area of the N low-orbit satellites to the low-orbit satellite 2 in the management domain of the high-orbit satellite 1 or the high-orbit satellite 1 outside the management domain of the high-orbit satellite 1.
In an eighth embodiment of the present invention, there is provided a system based on high-low earth orbit satellite communication, the system comprising a high earth orbit satellite 1 and a plurality of low earth orbit satellites 2;
the low-orbit satellites 2 are used for acquiring and receiving event information in respective coverage areas and reporting service information of the event information to the high-orbit satellites 1;
the high-orbit satellite 1 is configured to distribute and match the service information to a low-orbit satellite 2 in a management domain of the high-orbit satellite 1 or a high-orbit satellite 1 outside the management domain of the high-orbit satellite 1.
In this embodiment, different inter-satellite communication strategies may be selected according to different users in the inter-satellite network and according to the inter-satellite network environment where the user is located, and two inter-satellite network environments are selected below to further explain or explain the system, but the embodiment of the present invention does not uniquely limit the inter-satellite network environment where the user is located:
if two low earth orbit satellites 2 are respectively in the management domain of different high earth orbit satellites, when a user a of a requester and a user B of a receiver of the two low earth orbit satellites 2 respectively want to know the related information of each other:
the method comprises the steps that a low-orbit satellite 2 in a coverage area of a user A acquires and receives event information initiated by the user A, the low-orbit satellite 2 corresponding to the user A reports service information of the event information to a high-orbit satellite 1 through a cluster head in a management area, the high-orbit satellite 1 and the high-orbit satellite 1 are communicated, the high-orbit satellite 1 of the user A forwards the service information to a high-orbit satellite 1 of the user B, the high-orbit satellite 1 of the user B searches for the cluster head of the low-orbit satellite 2 in which the user B is located, the satellite cluster head searches for the low-orbit satellite 2 corresponding to the user B, and the low-orbit satellite 2 corresponding to the user B can send the service information to the user B.
If two low orbit satellites 2 are located in the same high orbit satellite 1, when a user a on the requesting side and a user B on the receiving side, which are located in the coverage areas of the two low orbit satellites 2, respectively, want to know the related information of each other:
the method comprises the steps that a low-orbit satellite 2 in a coverage area of a user A acquires and receives event information initiated by the user A, the low-orbit satellite 2 corresponding to the user A reports service information of the event information to a high-orbit satellite 1 through a cluster head in a management area, the high-orbit satellite 1 does not need to communicate with other high-orbit satellites 1, the high-orbit satellite 1 directly searches the cluster head of the low-orbit satellite 2 in the area of the user B in a self management area, the satellite cluster head searches the low-orbit satellite 2 corresponding to the user B, and the low-orbit satellite 2 corresponding to the user B can send the service information to the user B, so that cooperative management among satellite systems is completed.
In a ninth embodiment of the present invention, there is provided a system based on high-low earth orbit satellite communication, the system comprising a high earth orbit satellite 1 and a low earth orbit satellite 2;
the high-orbit satellite 1 acquires and receives the event information which is not in the coverage area of the low-orbit satellite 2; the high-orbit satellite 1 distributes and matches the service information of the event information which is not in the coverage area of the low-orbit satellite 2 to the low-orbit satellite 2 in the management domain of the high-orbit satellite 1 or the high-orbit satellite 1 outside the management domain of the high-orbit satellite 1. In the following, three inter-satellite network environments are selected to further explain or explain the system, but the embodiment of the present invention does not make a unique limitation on the inter-satellite network environment where the user is located:
if the user a of the requesting party is not in the coverage area of any low orbit satellite 2, but the user B of the receiving party is in the coverage area of a low orbit satellite 2, and the user a of the requesting party and the user B of the receiving party are both in the management domain of the same high orbit satellite 1, when the user a of the requesting party and the user B of the receiving party want to know the related information of each other:
the high orbit satellite 1 collects and receives event information initiated by a user A which is not in the coverage area of any low orbit satellite 2, the high orbit satellite 1 searches a cluster head of the low orbit satellite 2 in the area where the user B is located in a self management area, the satellite cluster head searches the low orbit satellite 2 corresponding to the user B, and the low orbit satellite 2 corresponding to the user B can send service information to the user B, so that cooperative management among satellite systems is completed.
If the user a of the requesting party is not in the coverage area of any low orbit satellite 2, but the user B of the receiving party is in the coverage area of a low orbit satellite 2, and the user a of the requesting party and the user B of the receiving party are under different administrative domains of the high orbit satellite 1, when the user a of the requesting party and the user B of the receiving party want to know the related information of each other:
the method comprises the steps that a high-orbit satellite 1 of a user A collects and receives event information initiated by the user A which is not in the coverage area of any low-orbit satellite 2, the high-orbit satellite 1 of the user A communicates with the high-orbit satellite 1 of the user B, the high-orbit satellite 1 of the user A forwards service information to the high-orbit satellite 1 of the user B, the high-orbit satellite 1 of the user B searches a cluster head of the low-orbit satellite 2 where the user B is located, the satellite cluster head searches the low-orbit satellite 2 corresponding to the user B, and the low-orbit satellite 2 corresponding to the user B can send the service information to the user B.
If the user A of the requester and the user B of the receiver are not in the coverage area of any low orbit satellite 2 but are in the management domain of the same high orbit satellite 1, the user A directly communicates with the high orbit satellite 1, the high orbit satellite 1 collects and receives event information initiated by the user A, and service information of the event information is distributed and matched to the user B in the management domain of the high orbit satellite 1.
When the service information is stored in the same way, the satellite mobile edge computing storage server of the high orbit satellite 1 or the low orbit satellite 2 only stores hot service information with the highest hit rate in the region in which the satellite is administered, the service information of other regions is obtained from other satellite mobile edge computing storage servers, and the conventional data request process of the service information is carried out only when no file of the requested service information exists on the satellite mobile edge computing storage server.
Obviously, the invention realizes the cooperative operation of wide area information acquisition and distribution among high and low orbit satellites through an inter-satellite communication resource cooperative management mode, provides an inter-satellite resource storage and unloading mode, realizes the cooperative storage and distributed unloading of the inter-high and low orbit satellites, improves the inter-satellite resource scheduling efficiency and utilization rate, and reduces the inter-satellite resource calculation delay.
In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method based on high-low orbit satellite communication, comprising:
n low-orbit satellites collect and receive event information in respective coverage areas, and report service information of the event information to the high-orbit satellites, wherein N is a positive integer;
the high-orbit satellite distributes and matches the service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain;
the method further comprises the following steps:
the high-orbit satellite controls the storage of the service information of the N low-orbit satellites in the management domain;
the high-orbit satellite controls the storage of the service information of the N low-orbit satellites in the management domain thereof, and the storage comprises the following steps:
the N low-orbit satellites identify and read the service information in the coverage areas of the N low-orbit satellites, extract hot service information, store the hot service information and report the hot service information to the high-orbit satellites;
and the high orbit satellite extracts and stores the hottest service information which is the hottest in the hottest service information reported by each low orbit satellite.
2. The method for high-low orbit satellite based communication according to claim 1, wherein the method further comprises:
the high-orbit satellite acquires and receives the event information which is not within the coverage area of the N low-orbit satellites.
3. The method of claim 2, wherein the high-orbit satellite acquiring and receiving the event information that is not within the coverage area of the N low-orbit satellites comprises:
and the high-orbit satellite distributes and matches the service information of the event information which is not in the coverage area of the N low-orbit satellites to the low-orbit satellite in the high-orbit satellite management domain or the high-orbit satellite outside the high-orbit satellite management domain.
4. The method for high-low orbit satellite based communication according to claim 1, wherein the method further comprises:
the high-orbit satellite controls the unloading of the service information of the N low-orbit satellites in the management domain.
5. The method of claim 4, wherein the high-earth orbit satellite controlling the offloading of traffic information for the N low-earth orbit satellites in its administrative domain comprises:
the high-orbit satellite receives the service information to be processed reported by the N low-orbit satellites;
if the service information to be processed by the N low-orbit satellites contains the same service information, the high-orbit satellite controls the N low-orbit satellites to unload the same service information to the high-orbit satellite;
and the high-orbit satellite distributes and matches the same service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain.
6. The method according to claim 4 or 5, wherein the controlling of the offloading of the traffic information of the N low-orbit satellites in the management domain by the high-orbit satellite comprises:
the high-orbit satellite receives the calculation load quantity reported by the N low-orbit satellites and the service information to be processed;
and the high-orbit satellite controls the low-orbit satellite with large calculation capacity to unload the service information to be processed and transmit the service information to the low-orbit satellite with small calculation capacity according to the calculation capacity of each low-orbit satellite.
7. The method according to any of claims 1-5, wherein the control plane of the high-earth orbit satellite and the low-earth orbit satellite is separated from the traffic plane.
8. A system based on high-low orbit satellite communication, characterized in that the system comprises a high orbit satellite and N low orbit satellites;
the N low-orbit satellites are used for collecting and receiving event information in respective coverage areas and reporting service information of the event information to the high-orbit satellites;
the high-orbit satellite is used for distributing and matching the service information to a low-orbit satellite in the high-orbit satellite management domain or a high-orbit satellite outside the high-orbit satellite management domain;
the high-orbit satellite controls the storage of the service information of the N low-orbit satellites in the management domain;
the high-orbit satellite controls the storage of the service information of the N low-orbit satellites in the management domain thereof, and the storage comprises the following steps:
the N low-orbit satellites identify and read the service information in the coverage areas of the N low-orbit satellites, extract hot service information, store the hot service information and report the hot service information to the high-orbit satellites;
and the high orbit satellite extracts and stores the hottest service information which is the hottest in the hottest service information reported by each low orbit satellite.
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