Low-orbit satellite communication networking system
By designing data forwarding modules in the low -orbit satellite communication group network, data reposting between non -adjacent low -orbit communication satellites, the low -orbit satellite communication group network network, network communication delay, network node load Optimization space in the equal aspects realizes the effect of reducing communication latency and network load and improving system stability.
Patent Information
- Application Number
- CN202411537070.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-01-28
AI Technical Summary
The low-orbit satellite communication network has room for optimization in terms of data transmission path, network communication delay, network node load, etc.
Design a low -orbital satellite communication networking system. The first and second data forwarding modules conduct data forwarding between non -adjacent low -orbital communication satellites, and use ground forwarding stations or third low -orbit communication satellites as intermediate forwarding nodes , Shorten the length of the data link.
It reduces the load of communication latency and satellite communication networks, maintains the complexity of the lower star link chain strategy, and improves the stability of the satellite communication system.
Smart Images
Figure CN119382772A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of satellite communication technology, and in particular to a low-orbit satellite communication networking system. Background Art
[0002] Low-orbit satellite communication is a satellite communication technology with the advantages of wide network coverage, high reliability, low latency, large capacity and weak dependence on ground networks.
[0003] Low-orbit satellites can be networked through inter-satellite links or mixed with higher-orbit satellites to form a multi-layer space network. According to the communication networking method, satellite networks can be divided into three categories, namely satellite networks without inter-satellite links, satellite networks with inter-satellite links, and satellite networks with dynamic inter-satellite links. Among them, there are no inter-satellite links between satellites in satellite networks without inter-satellite links. They are connected by bent pipes and networked based on ground facilities; satellites in satellite networks with inter-satellite links are connected by inter-satellite links and the connection method is fixed without dynamic adjustment. They can rely on their own links for networking; the connection method between satellites in satellite networks with dynamic inter-satellite links is not fixed and will change with changes in network topology and business, also known as space mobile ad hoc networking.
[0004] In a satellite network with intersatellite links, since multiple low-orbit satellites form a satellite network, data sent by a ground transmitter usually needs to be forwarded by multiple low-orbit satellites before it can be received by the ground receiver. In addition, since low-orbit satellites move relative to the earth, it is necessary to reasonably design the data transmission path. In the case of conventional networking, there is a lot of room for optimization in the low-orbit satellite communication network in terms of data transmission path, network communication delay, network node load, etc. Summary of the invention
[0005] In view of the optimization space in low-orbit satellite communication networking technology in terms of data transmission path, network communication delay, network node load, etc., the purpose of the present invention is to provide a low-orbit satellite communication networking system.
[0006] An embodiment of the present invention includes a low-orbit satellite communication networking system, and the low-orbit satellite communication networking system includes:
[0007] A first data forwarding module; the first data forwarding module is used to receive the data to be forwarded sent by the first low-orbit communication satellite, and send the data to be forwarded to the second low-orbit communication satellite; the sub-satellite point trajectory of the first low-orbit communication satellite belongs to a first group of sub-satellite point trajectories, and the sub-satellite point trajectory of the second low-orbit communication satellite belongs to a second group of sub-satellite point trajectories, and the first group of sub-satellite point trajectories and the second group of sub-satellite point trajectories are in opposite lifting and lowering phases in the same direction.
[0008] Furthermore, the low-orbit satellite communication networking system includes:
[0009] The second data forwarding module is used for:
[0010] receiving data to be forwarded sent by the first low-orbit communication satellite and / or the second low-orbit communication satellite, and sending the data to be forwarded to a ground communication network;
[0011] and / or
[0012] Receiving data to be forwarded sent by a ground communication network, and sending the data to be forwarded to a first low-orbit communication satellite and / or a second low-orbit communication satellite;
[0013] Among them, the sub-satellite point trajectory of the first low-orbit communication satellite belongs to a first group of sub-satellite point trajectories, and the sub-satellite point trajectory of the second low-orbit communication satellite belongs to a second group of sub-satellite point trajectories. The first group of sub-satellite point trajectories and the second group of sub-satellite point trajectories are in opposite rising and falling phases in the same direction.
[0014] Furthermore, the first low-orbit communication satellite is in an orbit raising phase, and the second low-orbit communication satellite is in an orbit lowering phase.
[0015] Furthermore, the first low-orbit communication satellite is in an orbit lowering phase, and the second low-orbit communication satellite is in an orbit raising phase.
[0016] Furthermore, the first data forwarding module is a ground forwarding station.
[0017] Furthermore, the first data forwarding module is a third low-orbit communication satellite.
[0018] Furthermore, the second data forwarding module is a ground gateway.
[0019] Furthermore, the first data forwarding module is used to serve as a transparent forwarding node between the first low-orbit communication satellite and the second low-orbit communication satellite.
[0020] Furthermore, the low-orbit satellite communication networking system also includes:
[0021] The first low-orbit communication satellite, the second low-orbit communication satellite and the ground communication network.
[0022] The beneficial effects of the present invention are as follows: through the low-orbit satellite communication networking system in the embodiment, data forwarding can be performed between two non-adjacent low-orbit communication satellites that are not directly connected by inter-satellite links through an intermediate data forwarding module, which helps to shorten the link length through which the data to be forwarded passes, reduce communication delays and the load on the satellite communication network, maintain a low complexity of the inter-satellite link establishment strategy, and improve the stability of the satellite communication system. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 Schematic diagram of sub-satellite point trajectory in the embodiment;
[0024] Figure 2 Schematic diagram of the neighboring relationship between low-orbit communication satellites in the embodiment;
[0025] Figure 3 A schematic diagram of the neighbor relationship between low-orbit communication satellites located in different groups of sub-satellite point trajectories in an embodiment;
[0026] Figure 4 A schematic diagram of a distributed configuration including multiple ground repeater stations in an embodiment;
[0027] Figure 5 Schematic diagram of the working principle of the ground forwarding station used as the first data forwarding module in the embodiment;
[0028] Figure 6 This is a schematic diagram of the effect of the low-orbit satellite communication networking system in the embodiment;
[0029] Figure 7 Schematic diagram of the working principle of the ground gateway used as the second data forwarding module in the embodiment. DETAILED DESCRIPTION
[0030] The low-orbit satellite communication networking system in this embodiment can be applied to Figure 1 The low-orbit inclined orbit satellite communication system shown in the figure. The orbit altitude of low-orbit inclined orbit satellites is usually between 160 km and 2000 km, and its orbit inclination is between 0° and 180°, including two types: prograde (0° to 90°, from west to east along the rotation of the earth) and retrograde (90° to 180°, from east to west against the rotation of the earth).
[0031] The operation of a low-orbit communication satellite can be represented by its sub-satellite point trajectory. For a low-orbit communication satellite, the ground point directly below it is called the sub-satellite point, that is, its sub-satellite point is the intersection of the line connecting the center of the earth and the satellite on the earth's surface. The position of the sub-satellite point can be represented by longitude and latitude coordinates; since the low-orbit communication satellite moves relative to the earth, the position of its sub-satellite point will also change, thus forming a sub-satellite point trajectory. Therefore, the sub-satellite point trajectory of a low-orbit communication satellite is equivalent to the projection of its orbit on the earth's surface.
[0032] The “sub-satellite point trajectory” mentioned in this embodiment may be a complete sub-satellite point trajectory that circles the earth's surface at least once (may be closed or may not be closed), or may be a part of such a sub-satellite point trajectory.
[0033] Reference Figure 1, which shows two sub-satellite point tracks, each of which may correspond to multiple low-orbit communication satellites, that is, multiple low-orbit communication satellites may operate along the same sub-satellite point track. When the inclination of a low-orbit communication satellite is not 0, the sub-satellite point track of this low-orbit communication satellite will not be parallel to any latitude line. Therefore, according to the running direction of the low-orbit communication satellite, the sub-satellite point track will have a part of the latitude increasing, which is called the orbit raising stage, and another part of the latitude decreasing, which is called the orbit lowering stage. For example, Figure 1 The two subsatellite point tracks in the figure have the northernmost point of their tracks (not marked in the figure). The satellites represented by the two subsatellite point tracks on the left side of the northernmost point are in the orbit raising phase. After the satellite passes the northernmost point of the orbit, it turns to the orbit lowering phase. Similarly, after the satellite moves further and passes the southernmost point of its orbit, it turns to the orbit raising phase again.
[0034] In this embodiment, for Figure 1 The multiple sub-satellite point trajectories shown in FIG. 1 and FIG. 2 have the characteristic of being in the same ascending and descending phase in the same direction. They can be classified into the same group of sub-satellite point trajectories. Figure 1 There is another set of sub-satellite point trajectories, and the multiple sub-satellite point trajectories within the other set of sub-satellite point trajectories also have the characteristic of "being in the same ascending and descending phase in the same direction", but any sub-satellite point trajectory in the other set of sub-satellite point trajectories is different from Figure 1 Any subsatellite point trajectory shown is "in the opposite ascending and descending phase in the same direction", for example, if Figure 1 Draw the subsatellite point trajectory in another set of subsatellite point trajectories, then the subsatellite point trajectory drawn will be Figure 1 The left side is in the descending orbit stage. Figure 1 The right side is in the ascending orbit stage.
[0035] In this embodiment, for any low-orbit communication satellite, other low-orbit communication satellites that can establish a direct inter-satellite link with it are called its neighbors. Figure 2 The same set of sub-satellite point tracks is shown in FIG, which includes three sub-satellite point tracks. For the low-orbit communication satellite in the middle of the middle sub-satellite point track, two low-orbit communication satellites (one in front of it and the other behind it) running along the middle sub-satellite point track and two low-orbit communication satellites on the left and right sides, a total of four low-orbit communication satellites, can establish direct inter-satellite links with it, so these four low-orbit communication satellites are called adjacent low-orbit communication satellites.
[0036] For a constellation of low-orbit inclined satellites with the same orbital inclination, altitude and operating period, an important feature is that the relative positions of the satellites are stable, that is, for two satellites that have an adjacent relationship at a certain moment and have the same operating direction, after running for n periods, their relative positions are still adjacent, even after the two orbits intersect in the high-latitude area of the orbit, they still maintain an adjacent relationship. The adjacent relationship of satellites can be defined as adjacent in a visual sense. For example, Figure 1 The specific positions of the two satellites at two different times are marked in the figure. It can be seen that the two satellites that were adjacent to each other at the first moment still have an adjacent relationship even if their orbits cross after running for a certain period of time, but their left-right relationship has changed.
[0037] Low-orbit satellite communication systems generally have at least one ground gateway as a connection anchor point and data exchange gateway between the satellite network and the ground network. Figure 2 As shown in the figure, for a system with fixed intersatellite links, each low-orbit communication satellite can generally be equipped with four intersatellite links and one feeder link, where the four intersatellite links can be defined as the front, back, left, and right directions of the low-orbit communication satellite. The links in the front and back directions are used to establish a connection with two adjacent low-orbit communication satellites in the same orbit, and the links in the left and right directions are used to establish a connection with the two closest low-orbit communication satellites in the left and right adjacent orbits. The feeder link is used to establish a connection between the satellite and the ground gateway when the satellite is visible and the conditions are suitable.
[0038] for Figure 2 In the case shown, the low-orbit communication satellite in the middle has four optional intersatellite links to send the data to be forwarded. Figure 3 In the case shown in FIG. 1 , low-orbit communication satellite ① and low-orbit communication satellite ② are located in one set of sub-satellite point tracks (referred to as the first set of sub-satellite point tracks in this embodiment), while low-orbit communication satellite ③ and low-orbit communication satellite ④ are located in another set of sub-satellite point tracks (referred to as the second set of sub-satellite point tracks in this embodiment). These two sets of sub-satellite point tracks are in opposite ascending and descending stages in the same direction, for example Figure 3 In the range shown, the first group of sub-satellite point trajectories where low-orbit communication satellite ① and low-orbit communication satellite ② are located are in the orbit descending stage, and the second group of sub-satellite point trajectories where low-orbit communication satellite ③ and low-orbit communication satellite ④ are located are in the orbit ascending stage.
[0039] for Figure 3In the situation shown, according to the previous definition, low-orbit communication satellite ① and low-orbit communication satellite ② are adjacent, and an inter-satellite link can be established between them. Similarly, low-orbit communication satellite ③ and low-orbit communication satellite ④ are adjacent, and an inter-satellite link can be established between them. For low-orbit communication satellite ① and low-orbit communication satellite ③, they are located in different groups of sub-satellite point tracks. Figure 3 In the range shown, their distance is relatively close, and they are visually adjacent, but due to their different running directions, the distance between them will gradually become farther as they run, so low-orbit communication satellite ① and low-orbit communication satellite ③ are not defined as having an adjacent relationship, and no intersatellite link is established between low-orbit communication satellite ① and low-orbit communication satellite ③. Similarly, low-orbit communication satellite ① and low-orbit communication satellite ④, low-orbit communication satellite ② and low-orbit communication satellite ③, and low-orbit communication satellite ② and low-orbit communication satellite ④ do not have an adjacent relationship, and no intersatellite link is established between them.
[0040] By not establishing intersatellite links between low-orbit communication satellites that are not adjacent to each other, that is, only establishing intersatellite links between low-orbit communication satellites that are adjacent to each other, the complexity of the intersatellite links can be reduced, the complexity of the routing algorithm and the resource usage can be reduced, and the stability of the satellite communication system can be improved.
[0041] for Figure 3 The situation shown will cause a problem: for example, if LEO communication satellite ② needs to send the data to be forwarded to LEO communication satellites running in different groups of sub-satellite point orbits, such as LEO communication satellite ③ and LEO communication satellite ④, since there is no direct inter-satellite link between LEO communication satellite ② and LEO communication satellite ③ or between LEO communication satellite ② and LEO communication satellite ④, LEO communication satellite ② needs to forward the data to be forwarded between LEO communication satellites in the same direction as LEO communication satellite ②, and the data to be forwarded needs to pass through the southernmost or northernmost point of a certain orbit in the same direction as LEO communication satellite ② before being forwarded to the LEO communication satellite in the opposite direction of LEO communication satellite ②, and the data to be forwarded is forwarded between LEO communication satellites in the opposite direction of LEO communication satellite ② until it is sent to LEO communication satellite ③. The whole process has undergone a long link forwarding. In the worst case, the data needs to "go halfway around the earth" to reach the destination. Such a data forwarding process increases the data delay while also increasing the burden on the entire satellite communication network, which needs to be optimized.
[0042] for Figure 3 In the case shown, in this embodiment, a low-orbit satellite communication networking system is provided, and the low-orbit satellite communication networking system includes a first data forwarding module. The first low-orbit communication satellite and the second low-orbit communication satellite connected to the first data forwarding module can also be used as components of the low-orbit satellite communication networking system.
[0043] In this embodiment, the specific form of the first data forwarding module can be a ground forwarding station or a third low-orbit communication satellite, etc., wherein the third low-orbit communication satellite is a low-orbit communication satellite other than the first low-orbit communication satellite and the second low-orbit communication satellite. In other words, the ground forwarding station or the third low-orbit communication satellite can be used as the first data forwarding module to forward data between the first low-orbit communication satellite and the second low-orbit communication satellite.
[0044] Generally speaking, if a ground forwarding station is provided, the ground forwarding station can be selected as the first data forwarding module. The ground forwarding station has the advantage of stability because of its fixed position. It is also possible to use a satellite in a certain orbit (i.e., the third low-orbit communication satellite) as a forwarding node between the ascending and descending orbit satellites, that is, to use the third low-orbit communication satellite as the first data forwarding module. The advantage of this solution is that the intersatellite link is not easily blocked and the link quality is stable.
[0045] In this embodiment, a ground forwarding station is taken as an example of the first data forwarding module for description.
[0046] Reference Figure 4 and Figure 5 The first group of sub-satellite point trajectories are the two sub-satellite point trajectories in the orbit descending stage, namely, the sub-satellite point trajectories where the low-orbit communication satellite ① and the low-orbit communication satellite ② are located, and the second group of sub-satellite point trajectories are the two sub-satellite point trajectories in the orbit ascending stage, namely, the sub-satellite point trajectories where the low-orbit communication satellite ③ or the low-orbit communication satellite ④ is located.
[0047] Reference Figure 4 , multiple ground forwarding stations can be distributed around the world, and each ground forwarding station can be connected to the corresponding first low-orbit communication satellite and the second low-orbit communication satellite. Alternatively, each pair of low-orbit communication satellites in the orbit-raising stage and the low-orbit communication satellites in the orbit-lowering stage can serve as the first low-orbit communication satellite and the second low-orbit communication satellite, and be connected to the corresponding ground forwarding station (as the first data forwarding module) for data forwarding, thereby improving data transmission efficiency.
[0048] For example, Figure 4 The various ground repeater stations in the system can be set up in a manner of setting up one ground repeater station in each country or one ground repeater station in each major city.
[0049] Take one of the ground repeater stations as an example. Figure 5If the first low-orbit communication satellite (low-orbit communication satellite ②) wants to forward data to the second low-orbit communication satellite (low-orbit communication satellite ③), then the first low-orbit communication satellite (low-orbit communication satellite ②) can send the data to be forwarded to the ground forwarding station, and the ground forwarding station forwards the data to be forwarded to the second low-orbit communication satellite (low-orbit communication satellite ③). In this way, even if the first low-orbit communication satellite (low-orbit communication satellite ②) and the second low-orbit communication satellite (low-orbit communication satellite ③) do not establish a direct inter-satellite link because they are not in the same group of sub-satellite point trajectories, the first low-orbit communication satellite (low-orbit communication satellite ②) and the second low-orbit communication satellite (low-orbit communication satellite ③) can also forward data through the ground forwarding station, which helps to shorten the link length of the data to be forwarded, reduce communication delays and the load on the satellite communication network, and can maintain Figure 3 The system design shown in the figure "does not establish intersatellite links between low-orbit communication satellites that are not adjacent to each other, but only establishes intersatellite links between low-orbit communication satellites that are adjacent to each other" has the advantages of improving the stability of the satellite communication system.
[0050] For example, Figure 6 The ground terminal on the left side (specifically, it can be a mobile phone or a vehicle-mounted communication device, etc.) needs to send the data to be forwarded to Figure 6 The gateway station on the right side of the middle, then the ground terminal can first send the data to be forwarded to the low-orbit communication satellite to which it can directly connect. The low-orbit communication satellite that directly receives the data to be forwarded from the ground terminal can find other low-orbit communication satellites for forwarding according to the routing algorithm; refer to Figure 6 , the low-orbit communication satellite directly connected to the ground terminal is in the orbit-lowering stage, while the low-orbit communication satellite directly connected to the gateway is in the orbit-raising stage, then the sending process of the data to be forwarded will face the forwarding from the orbit-lowering satellite to the orbit-raising satellite; refer to Figure 6 The first three hops of the data to be forwarded are forwarded by the low-orbit communication satellite in the orbit-descending stage, and the last low-orbit communication satellite in the orbit-descending stage (i.e. Figure 6 The third low-orbit communication satellite from the left in the middle) sends the data to be forwarded to the ground forwarding station, which forwards the data to be forwarded to the first low-orbit communication satellite in the orbit raising phase (i.e. Figure 6 The fourth low-orbit communication satellite from the left in the middle), the low-orbit communication satellite then searches for other low-orbit communication satellites for forwarding based on the routing algorithm. The last three hops are forwarded to the gateway via low-orbit communication satellites in the orbit raising stage.
[0051] Reference Figure 6Due to the establishment of a ground relay station, low-orbit communication satellites that are in opposite sub-satellite point trajectories in two sets of ascending and descending phases and have no direct inter-satellite links can forward the data to be forwarded through the ground relay station, thereby greatly reducing the link distance that the data to be forwarded may need to be transmitted, thereby improving communication efficiency.
[0052] In this embodiment, each ground forwarding station acts as a transparent forwarding node. For example, after receiving the data to be forwarded, the ground forwarding station does not process the data to be forwarded, but only forwards the data to be forwarded to the second low-orbit communication satellite. In this way, each ground forwarding station only performs the forwarding function, rather than performing the gateway function as a ground communication gateway.
[0053] Figure 4 and Figure 5 The ground repeater station shown can be installed in a fixed manner at a location. When the location of the ground repeater station is fixed, the topology of the entire network formed by the low-orbit satellite communication network and the low-orbit satellite communication networking system is also relatively stable, thereby maintaining the forwarding delay of the entire network at a relatively stable level.
[0054] In this embodiment, refer to Figure 7 The low-orbit satellite communication networking system may also be provided with a second data forwarding module. The second data forwarding module performs the same data forwarding function as the first data forwarding module. Specifically, Figure 7 As shown, the second data forwarding module may be a ground gateway, and the ground gateway is taken as an example of the second data forwarding module for description.
[0055] Reference Figure 7 , the ground gateway station can be connected to the ground communication network through wired media such as optical fiber. The ground communication network can also be used as a component of the low-orbit satellite communication networking system. The ground communication network can send the data to be forwarded that needs to be sent to the low-orbit communication satellite to the ground gateway station, and the ground gateway station sends the data to be forwarded to any one of the first low-orbit communication satellite (the low-orbit communication satellite in the orbit raising stage) or the second low-orbit communication satellite (the low-orbit communication satellite in the orbit descending stage) according to its internal routing strategy, or sends the data to be forwarded to both the first low-orbit communication satellite and the second low-orbit communication satellite; according to the other direction of the link, the first low-orbit communication satellite (the low-orbit communication satellite in the orbit raising stage) can send the data to be forwarded to the ground gateway station, and the ground gateway station sends the forwarded data to the ground communication network. Similarly, the second low-orbit communication satellite (the low-orbit communication satellite in the orbit descending stage) can also send the data to be forwarded to the ground gateway station, and the ground gateway station sends the forwarded data to the ground communication network. For example Figure 7In the present invention, low-orbit communication satellite ① and low-orbit communication satellite ② respectively send data to be forwarded to the ground communication gateway station serving as the second data forwarding module, and the second data forwarding module sends the received data to be forwarded to the ground communication network.
[0056] By setting up a second data forwarding module, direct transmission of data to be forwarded between a low-orbit communication satellite in the orbit raising stage and / or a low-orbit communication satellite in the orbit lowering stage and a ground communication network can be achieved. Similar to setting up the first data forwarding module, it can also help shorten the length of the link through which the data to be forwarded passes, reduce communication delays and the load on the satellite communication network, maintain a low complexity of the inter-satellite link establishment strategy, and improve the stability of the satellite communication system.
[0057] In this embodiment, the first data forwarding module and the second data forwarding module can be provided at the same time or separately. That is to say, the low-orbit satellite communication networking system can be provided with the first data forwarding module and the second data forwarding module at the same time, or only with the first data forwarding module, or only with the second data forwarding module.
[0058] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present disclosure are only relative to the relative positional relationship of the components of the present disclosure in the accompanying drawings. The singular forms of "a", "" and "the" used in the present disclosure are also intended to include the plural forms, unless the context clearly indicates other meanings. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by those skilled in the art. The terms used in the specification of this embodiment are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this embodiment includes any combination of one or more related listed items.
[0059] It should be understood that, although the term first, second, third etc. may be adopted to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish the same type of elements from each other. For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element. The use of any and all examples or exemplary language ("for example", "such as" etc.) provided by the present embodiment is only intended to better illustrate embodiments of the present invention, and unless otherwise required, the scope of the present invention will not be limited.
[0060] It should be appreciated that embodiments of the present invention may be implemented or enforced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The method may be implemented in a computer program using standard programming techniques - including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner - according to the methods and drawings described in the specific embodiments. Each program may be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, if desired, the program may be implemented in assembly or machine language. In any case, the language may be a compiled or interpreted language. In addition, the program may be run on a programmed dedicated integrated circuit for this purpose.
[0061] In addition, the operations of the process described in this embodiment may be performed in any suitable order, unless otherwise indicated in this embodiment or otherwise clearly contradicted by the context. The process described in this embodiment (or variations and / or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as a code (e.g., executable instructions, one or more computer programs, or one or more applications) executed on one or more processors in common, by hardware or a combination thereof. A computer program includes a plurality of instructions that may be executed by one or more processors.
[0062] Further, the method can be implemented in any type of computing platform that is operably connected to a suitable computer, including but not limited to a personal computer, a minicomputer, a mainframe, a workstation, a network or distributed computing environment, a separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Various aspects of the present invention can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and / or write storage medium, a RAM, a ROM, etc., so that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the process described herein. In addition, the machine-readable code, or part thereof, can be transmitted via a wired or wireless network. When such media includes instructions or programs that implement the above steps in conjunction with a microprocessor or other data processor, the invention of this embodiment includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques of the present invention, the present invention also includes the computer itself.
[0063] The computer program can be applied to input data to perform the functions of the present embodiment, thereby converting the input data to generate output data stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the converted data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on the display.
[0064] The above are only preferred embodiments of the present invention. The present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may have various modifications and changes.
Claims
1. A low-orbit satellite communication networking system, characterized in that: The low-orbit satellite communication networking system comprises: A first data forwarding module; the first data forwarding module is used to receive the data to be forwarded sent by the first low-orbit communication satellite, and send the data to be forwarded to the second low-orbit communication satellite; the sub-satellite point trajectory of the first low-orbit communication satellite belongs to a first group of sub-satellite point trajectories, and the sub-satellite point trajectory of the second low-orbit communication satellite belongs to a second group of sub-satellite point trajectories, and the first group of sub-satellite point trajectories and the second group of sub-satellite point trajectories are in opposite lifting and lowering phases in the same direction.
2. A low-orbit satellite communication networking system, characterized in that: The low-orbit satellite communication networking system comprises: The second data forwarding module is used for: receiving data to be forwarded sent by the first low-orbit communication satellite and / or the second low-orbit communication satellite, and sending the data to be forwarded to a ground communication network; and / or Receiving data to be forwarded sent by a ground communication network, and sending the data to be forwarded to a first low-orbit communication satellite and / or a second low-orbit communication satellite; Among them, the sub-satellite point trajectory of the first low-orbit communication satellite belongs to a first group of sub-satellite point trajectories, and the sub-satellite point trajectory of the second low-orbit communication satellite belongs to a second group of sub-satellite point trajectories. The first group of sub-satellite point trajectories and the second group of sub-satellite point trajectories are in opposite rising and falling phases in the same direction.
3. The low-orbit satellite communication networking system according to claim 1 or 2, characterized in that: The first low-orbit communication satellite is in an orbit raising phase, and the second low-orbit communication satellite is in an orbit lowering phase.
4. The low-orbit satellite communication networking system according to claim 1 or 2, characterized in that: The first low-orbit communication satellite is in an orbit-lowering phase, and the second low-orbit communication satellite is in an orbit-raising phase.
5. The low-orbit satellite communication networking system according to claim 1, characterized in that: The first data forwarding module is a ground forwarding station.
6. The low-orbit satellite communication networking system according to claim 1, characterized in that: The first data forwarding module is the third low-orbit communication satellite.
7. The low-orbit satellite communication networking system according to claim 2, characterized in that: The second data forwarding module is a ground gateway.
8. The low-orbit satellite communication networking system according to claim 1, characterized in that: The first data forwarding module is used to serve as a transparent forwarding node between the first low-orbit communication satellite and the second low-orbit communication satellite.
9. The low-orbit satellite communication networking system according to claim 1 or 2, characterized in that: The low-orbit satellite communication networking system also includes: The first low-orbit communication satellite, the second low-orbit communication satellite and the ground communication network.