A communication network structure based on Walker constellation and a construction method thereof

Abstract

The application provides a communication network structure suitable for a Walker constellation and a construction method thereof. The Walker constellation comprises M satellite orbits, and N satellites are uniformly distributed on each satellite orbit. The communication network structure comprises a first wavelength transmission network. In the first wavelength transmission network: the N satellites on each satellite orbit have a same-orbit transmission channel between the N satellites and the next satellite in a first circulation direction; the N satellites on any two adjacent satellite orbits form one-to-one corresponding N inter-orbit communication channels; and the transmission directions of adjacent inter-orbit communication channels are opposite in the N inter-orbit communication channels.

Description

Technical Field

[0001] This invention relates to the field of satellite communications, and in particular to a communication network structure based on the Walker constellation and its construction method. Background Technology

[0002] With the rapid development of the internet industry and information technology, the information traffic of future communication networks will experience a massive increase. The existing terrestrial communication networks can no longer meet the needs of the information and communication industry, and the construction of space information networks not only compensates for the shortcomings of terrestrial communication networks but also has significant strategic importance. Therefore, in recent years, relevant countries have been actively promoting the construction of space networks. As the application fields of satellites continue to expand, many missions can no longer be completed using a single satellite. Compared with a single satellite, the coverage range of a satellite constellation is significantly increased. A reasonable constellation configuration can achieve continuous global coverage or multiple continuous global coverage. This characteristic gives satellite constellations unique advantages in global communication or navigation missions, and their overall functionality far exceeds that of a single satellite. Among them, the Walker constellation is a design used to deploy satellites in multiple orbital planes to achieve global or specific regional coverage. This design, proposed by John Walker in the 1970s, provides a systematic approach to optimize satellite coverage efficiency and communication capabilities.

[0003] Space laser communication technology, simply put, is a communication method that uses laser beams to transmit information in space (atmosphere, near-Earth orbit, deep space, etc.), and it is a core technology in the field of satellite communication. It has advantages such as high bandwidth, low loss, low crosstalk, small size, low power consumption, and simple implementation. It can effectively overcome the limitations of the "electronic bottleneck," reduce the size, weight, and power consumption of satellite space payloads, achieve high-bandwidth and ultra-high-speed signal processing, and significantly improve switching performance.

[0004] However, significant differences exist between space laser communication technology and traditional terrestrial communication technology, making it impossible to directly transplant mature terrestrial communication technologies into space laser communication. For example, in wavelength division multiplexing (WDM) systems, different terminals may use different wavelengths for communication. All-optical wavelength converters can directly convert signals to the target wavelength, avoiding the delays and complexities of traditional optical-electrical-optical conversion. However, when extending terrestrial communication technologies to space communication, existing all-optical wavelength converters cannot perform all-optical wavelength conversion between any two adjacent satellites in a space network. The only available wavelength conversion method is optical-electrical-optical, which is difficult to adapt to the high-speed and high-capacity development requirements of space communication.

[0005] To enable communication within a constellation network, this application provides a communication network structure based on the Walker constellation and a method for constructing it. Summary of the Invention

[0006] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0007] In developing this invention, the applicant discovered that free-space laser transmission is subject to interference from background light such as sunlight and starlight, making it difficult to use wavelength division multiplexing (WDM) technology. Introducing WDM would significantly impact receiver sensitivity and shorten communication distance. Furthermore, unlike terrestrial communication where crosstalk occurs with the same wavelength, preventing ground antennas from using the same wavelength for transmission and reception, laser communication does not have this problem. Therefore, in satellite constellation networks, using the same wavelength can avoid the need for WDM.

[0008] However, in satellite networks that use the same wavelength for communication, it is necessary to avoid multi-hop situations between two random nodes caused by the same wavelength setting. In order to solve the multi-hop problem in satellite constellation networks, this invention provides a communication network architecture based on the Walker constellation and its construction method.

[0009] According to one aspect of the present invention, a communication network architecture based on the Walker constellation is provided. The Walker constellation includes M satellite orbits arranged sequentially along the surface of a central celestial body, with N satellites evenly distributed in each orbit, where N is an even number, M ≥ 2, and N ≥ 4.

[0010] In one embodiment, the communication network architecture includes a first wavelength transmission network, in which: N satellites in each satellite orbit have a co-orbit transmission channel with the next satellite in a first cyclic direction, and N inter-orbit communication channels are formed one-to-one between any two adjacent satellite orbits of N satellites, and the transmission directions of adjacent inter-orbit communication channels are opposite.

[0011] In one embodiment, when M≥3, the transmission directions of the N inter-orbit communication channels formed between any j-th satellite orbit and the (j+1)-th satellite orbit are identical to those of the N inter-orbit communication channels formed between the (j-1)-th satellite orbit and the j-th satellite orbit, where j∈[2, M-1].

[0012] In one embodiment, the communication network structure may further include: a second wavelength transmission network, the second wavelength being different from the first wavelength, in which: N satellites in each satellite orbit have a co-orbit transmission channel with the next satellite in sequence along a second cyclic direction, the second cyclic direction being opposite to the first cyclic direction, and the N inter-orbit communication channels formed one-to-one between N satellites in any two adjacent satellite orbits having the opposite transmission direction to the N inter-orbit communication channels in the first transmission wavelength.

[0013] According to another aspect of the present invention, a method for constructing a communication network structure for the Walker constellation is provided. This method includes establishing a first wavelength transmission network. Establishing the first wavelength transmission network includes: determining the current satellite's orbit within the Walker constellation and its position within that orbit; and establishing a communication network for the current satellite based on its orbit and position, including: establishing a co-orbit transmission channel between the current satellite and the next satellite in its orbit; when the current satellite is the Nth satellite in its orbit, the next satellite is the first satellite in that orbit; when the current satellite orbit is not the Mth orbit, establishing an inter-orbit communication channel between the current satellite and a satellite at the same position in the next orbit, wherein the transmission direction of the inter-orbit communication channel between the current satellite and the next orbit is opposite to that of its adjacent inter-orbit communication channel; and when the current satellite orbit is the first orbit and the current satellite is the first satellite, arbitrarily setting the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second orbit.

[0014] In one embodiment, when M≥3, when the current satellite orbit is not the Mth satellite orbit, establishing an inter-orbit communication channel between the current satellite and satellites at the same position in the next satellite orbit further includes: when the current satellite orbit is not the first satellite orbit and the current satellite is the first satellite in the current satellite orbit, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the next satellite orbit is the same as the transmission direction of the inter-orbit communication channel between the first satellite in the previous satellite orbit of the current satellite orbit and the current satellite.

[0015] In one embodiment, the method for constructing the communication network structure further includes establishing a second wavelength transmission network, the second wavelength being different from the first wavelength. Establishing the second wavelength transmission network includes: determining the current satellite's orbit in the Walker constellation and its position within the current satellite orbit; and establishing a communication network for the current satellite based on the current satellite orbit and its position within the current satellite orbit, including: establishing a co-orbit transmission channel between the current satellite and the next satellite in the current satellite orbit; when the current satellite is the Nth satellite in the current satellite orbit, the next satellite is the first satellite in the current satellite orbit; when the current satellite orbit is not the Mth satellite orbit, establishing an inter-orbit communication channel between the current satellite and a satellite at the same position in the next satellite orbit of the current satellite orbit, the transmission direction of the inter-orbit communication channel between the current satellite and the next satellite orbit being opposite to the transmission direction of its adjacent inter-orbit communication channel; when the current satellite orbit is the first satellite orbit and the current satellite is the first satellite, setting the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second satellite orbit to be opposite to the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second satellite orbit in the first wavelength transmission network.

[0016] In another embodiment, the method for constructing the communication network structure further includes establishing a second wavelength transmission network, the second wavelength being different from the first wavelength. Establishing the second wavelength transmission network includes: for each satellite in each satellite orbit, sequentially establishing corresponding co-orbit transmission channels and inter-orbit communication channels based on the second wavelength based on the satellite's co-orbit transmission channels and inter-orbit communication channels in the first wavelength transmission network. The transmission directions of the satellite based on the second wavelength co-orbit transmission channels and inter-orbit communication channels are opposite to the transmission directions of their respective co-orbit transmission channels and inter-orbit communication channels based on the first wavelength.

[0017] According to another aspect of this application, a computer device is also provided. The computer device includes a memory and a processor. The memory stores a computer program, and the processor is connected to the memory. The processor is configured to execute the computer program in the memory, and when executing the computer program, the processor implements the method for constructing the communication network structure of the Walker constellation as described in any of the foregoing embodiments.

[0018] According to another aspect of this application, a computer-readable storage medium storing computer-executable instructions is also provided, which, when executed, implement a method for constructing a communication network structure of the Walker constellation as described in any embodiment.

[0019] According to another aspect of this application, a computer program product is also provided, the computer program product including computer-executable instructions that, when executed, implement a method for constructing a communication network structure of the Walker constellation as in any embodiment. Attached Figure Description

[0020] The above-described features and advantages of the present invention will be better understood after reading the detailed description of the embodiments of this disclosure in conjunction with the following accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the Walker constellation according to one aspect of the present invention;

[0022] Figure 2 It is based on Figure 1 The diagram shown illustrates the structure of the Walker constellation.

[0023] Figure 3 This is a schematic diagram of a communication network structure according to one aspect of the present invention;

[0024] Figure 4 This is a flowchart illustrating a method for constructing a communication network structure according to another aspect of the present invention;

[0025] Figure 5 This is a partial flowchart illustrating a method for constructing a communication network structure according to another aspect of the present invention.

[0026] Figure 6 This is a schematic diagram of a communication network structure in another embodiment according to one aspect of the present invention;

[0027] Figure 7 This is a schematic diagram of a communication network structure according to another embodiment of one aspect of the present invention;

[0028] Figure 8 This is a partial flowchart illustrating a method for constructing a communication network structure according to another aspect of the present invention.

[0029] Figure 9 This is a schematic diagram of a communication network structure according to one aspect of the present invention;

[0030] Figure 10 This is a schematic block diagram of a computer device according to another aspect of the present invention. Detailed Implementation

[0031] The following description is provided to enable those skilled in the art to implement and use the invention and adapt it to specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0032] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that practice of the invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without being depicted in detail to avoid obscuring the invention.

[0033] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0034] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0037] The Walker constellation, proposed by British scientist John G. Walker in 1971, is a satellite constellation design method aimed at achieving continuous and uniform global or regional coverage by optimizing the spatial distribution of satellites. Walker constellations use circular orbits with satellites evenly distributed across their orbital planes, and the satellites are uniformly arranged within each orbital plane. This design makes the satellite motion relatively simple and predictable, which is beneficial for improving orbital control accuracy. For example, the Iridium system, the Starlink mobile phone direct connection satellite constellation, and the Nuwa constellation all use the Walker constellation configuration.

[0038] According to one aspect of this application, a communication network structure and its construction method are proposed based on the Walker constellation. To facilitate intuitive understanding by those skilled in the art, the communication network structure and its corresponding construction method are described interspersed below.

[0039] in, Figure 1 A schematic diagram of the Walker constellation is shown. Figure 1 As shown, the Walker constellation includes M satellite orbits O1~O2 surrounding the central celestial body A. M M satellite orbits O1~O M Arranged sequentially along the surface of the central celestial body A, each satellite orbits N satellites, meaning satellites S are evenly distributed along satellite orbit O1. 11 ~S 1N And so on, satellite orbit O M Satellites S are evenly distributed on the top M1 ~S MN Where N is an even number, M≥2, N≥4. Uniform distribution can be understood as any two satellites in the same orbit having the same orbital spacing.

[0040] “M satellite orbits O1~O M "Arranged sequentially along the surface of the central celestial body A" refers to the M satellite orbits O1~O M The orbits of these satellites are parallel to each other, and the plane containing the orbits of any satellite is perpendicular to an axis passing through the central celestial body A, similar to the arrangement of latitude lines on the Earth's surface.

[0041] For ease of illustration, in the schematic diagram of the communication network structure, each satellite orbit is drawn as a line segment in a plane to facilitate understanding of the relationships between the positions of satellites in different orbits. Figure 2 A schematic diagram of the planarized Walker constellation structure in one embodiment is shown. It can be understood that... Figure 2 and Figure 1 Both are structural diagrams of the Walker constellation, and they are equivalent to each other.

[0042] According to the technical concept of this application, the communication network structure includes a first wavelength transmission network, where the transmission wavelength of all channels in the first wavelength transmission network is the first wavelength. In the first wavelength transmission network, N satellites in each satellite orbit have co-orbit transmission channels with the next satellite in a first cyclic direction. N inter-orbit communication channels are formed one-to-one between any two adjacent satellite orbits of N satellites. Among the N inter-orbit communication channels, the transmission directions of adjacent inter-orbit communication channels are opposite.

[0043] The first cycle direction can be either along or against the direction of satellite movement on the satellite orbit, but the cycle direction on multiple satellite orbits must be the same.

[0044] Each satellite has a corresponding relationship with the nearest satellite in its adjacent orbit.

[0045] Any satellite in a satellite orbit can be taken as the first satellite and sorted along the first cycle direction to obtain the first to Nth satellites. The satellites in other satellite orbits that correspond to the first satellite can be taken as the first satellite in that satellite orbit and sorted along the first cycle direction to obtain the first to Nth satellites in other satellite orbits.

[0046] The satellite orbits can be sorted in the order of a straight line or curve that passes through and is perpendicular to the M satellite orbits. For example, when the satellite orbits are arranged according to the latitude lines on the Earth's surface, they can be sorted in either a forward or reverse order by any meridian passing through the M satellite orbits.

[0047] Those skilled in the art will understand that the sorting method of satellite orbits and the sorting method of satellites in satellite orbits do not affect the implementation effect of this application; it is only necessary that all satellite orbits adopt the same rule and all satellites in satellite orbits are arranged according to the same rule.

[0048] Figure 3 Taking M=2 as an example, a schematic diagram of the first wavelength transmission network in a communication network structure of one embodiment is shown.

[0049] like Figure 3 As shown, when M=2, the communication network structure includes two satellite orbits O1 and O2, with N satellites evenly distributed on each orbit. That is, N satellites S are evenly distributed on satellite orbit O1. 11 ~S 1N N satellites S are evenly distributed in satellite orbit O2. 21 ~S 2N .

[0050] N satellites S in satellite orbit O1 11 ~S 1N Along the first cycle direction X shown in the diagram, each satellite has a co-orbit transmission channel with the next satellite in the same orbit. That is, satellite S11 To satellite S 12 There is a co-track transmission channel C between them 11 Satellite S 12 To satellite S 13 There is a co-track transmission channel C between them 12 ...and so on, satellite S 1N-1 To satellite S 1N There is a co-track transmission channel C between them 1N-1 Star S 1N To satellite S 11 There is a co-track transmission channel C between them 1N .

[0051] N satellites S in satellite orbit O2 21 ~S 2N Along the first cycle direction X shown in the diagram, each satellite has a co-orbit transmission channel with the next satellite in the same orbit. That is, satellite S 21 To satellite S 22 There is a co-track transmission channel C between them 21 Satellite S 22 To satellite S 23 There is a co-track transmission channel C between them 22 ...and so on, satellite S 2N-1 To satellite S 2N There is a co-track transmission channel C between them 2N-1 Satellite S 2N To satellite S 21 There is a co-track transmission channel C between them 2N .

[0052] N satellites S in satellite orbit O1 11 ~S 1N With N satellites S in satellite orbit O2 21 ~S 2N One-to-one correspondence forms N inter-track communication channels I 11 ~I 1N Furthermore, the transmission directions of communication channels between adjacent tracks are opposite. For example... Figure 3 As shown, satellite S 11 With satellite S 21 Inter-orbit communication channel I 11 The transmission direction is determined by satellite S 11 Pointing to satellite S 21 Satellite S 12 With satellite S 22 Inter-orbit communication channel I 12 The transmission direction is determined by satellite S 22 Pointing to satellite S 12 ...and so on, satellite S 1N With satellite S 2N Inter-orbit communication channel I1N The transmission direction is determined by satellite S 2N Pointing to satellite S 1N It is understandable that, since N is an even number, the inter-orbit communication channel I... 1N The transmission direction and inter-orbit communication channel I 11 The transmission direction is opposite.

[0053] Correspondingly, Figure 4 This is a flowchart illustrating a method for constructing a communication network structure for a Walker constellation according to another aspect of the present invention. The method for constructing the communication network structure may include establishing a first wavelength transmission network. For example... Figure 4 As shown, establishing the first wavelength transmission network includes steps S110 to S120.

[0054] Step S110 involves determining the current satellite's orbit within the Walker constellation and its position within that orbit.

[0055] Step S120 is: to establish the satellite's communication network based on the current satellite orbit and the current satellite's position in the current satellite orbit.

[0056] by Figure 2 Taking the Walker constellation structure shown as an example, the orbits of M satellites O1~O2 can be sequentially arranged according to their orbital positions. M A communication network is established using N satellites in orbit O1. This involves starting with the first satellite S in orbit O1. 11 From the start of construction to the completion of satellite orbit O M The Nth satellite S MN The communication network was cut off.

[0057] by Figure 2 Any j-th satellite orbit O in the Walker constellation structure shown j Any satellite S on ji Taking (1≤j≤M, 1≤i≤N) as an example, we can use Figure 5 The diagram illustrates a portion of the construction method in one embodiment. For example... Figure 5 As shown, step S120 can be further refined into steps S121~S122.

[0058] Step S121 is: establish a co-orbit transmission channel between the current satellite and the next satellite in the current satellite orbit. When the current satellite is the Nth satellite in the current satellite orbit, the next satellite in the current satellite orbit is the first satellite in the current satellite orbit.

[0059] by Figure 3 Taking the communication network structure shown as an example, the first loop direction X is the satellite S. 11 To S1N Where M=2, then for Figure 3 Any satellite S in the communication network structure shown ji j=1 or 2, 1≤i≤N. When i≠N, establish the current satellite S. ji To the current satellite orbit O j The next satellite S ji+1 The same track transmission channel C between ji (like Figure 3 In the same track transmission channel C 1i and co-track transmission channel C 2i Satellite S ji To satellite S ji+1 Co-orbit transmission channels refer to transmission channels where the transmission direction is from satellites in the same orbit. ji Pointing to satellite S ji+1 The communication channel; when i=N, the current satellite S ji For satellite orbit O j The Nth satellite S jN , combined Figure 1 It can be understood that N satellites in the same orbit are uniformly distributed around a spherical or circular orbit, and the Nth satellite in any orbit is adjacent to the first satellite in its orbit. Therefore, the satellite orbit O... j The Nth satellite S jN The next satellite will be in satellite orbit O j The first satellite S j1 .

[0060] Step S122 is as follows: When the current satellite orbit is not the Mth satellite orbit, establish an inter-orbit communication channel between the current satellite and a satellite at the same position in the next satellite orbit of the current satellite orbit. The transmission direction of the inter-orbit communication channel between the current satellite and the next satellite orbit is opposite to that of its adjacent inter-orbit communication channel. When the current satellite orbit is the first satellite orbit and the current satellite is the first satellite, arbitrarily set the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite of the second satellite orbit.

[0061] by Figure 3 Taking the communication network structure shown as an example, the first loop direction X is the satellite S. 11 To S 1N Where M=2, then for Figure 3 Any satellite S in the communication network structure shown ji j=1 or 2, 1≤i≤N. When j≠M, i.e., j=1, establish the current satellite S. 1i Satellite S at the same position in the next satellite orbit O2 from the current satellite orbit O1 2i Inter-orbit communication channel I 1i .

[0062] Specifically, when i=1, given the inter-track communication channel I 1i Any transmission direction, for example, can be directed towards the current satellite S. 11 Pointing to the first satellite S in the second satellite orbit 21 Alternatively, it can be the first satellite S in the second satellite orbit. 21 Pointing to the current satellite S 11 .

[0063] When i≠1, the inter-track communication channel I 1i The transmission direction and its adjacent inter-track communication channel I 1i-1 The transmission directions are opposite. If adjacent inter-track communication channels I 1i-1 The transmission direction is satellite S 1i-1 Pointing to satellite S 2i-1 Then the inter-orbit communication channel I 1i The transmission direction is satellite S 2i Pointing to satellite S 1i If adjacent inter-track communication channels I 1i-1 The transmission direction is satellite S 2i-1 Pointing to satellite S 1i-1 Then the inter-orbit communication channel I 1i The transmission direction is satellite S 1i Pointing to satellite S 2i .

[0064] In conclusion, Figure 3 The communication network structure shown has been established.

[0065] Furthermore, in Figure 2 In the Walker constellation structure shown, when M≥3, the corresponding communication network structure of the Walker constellation can be referred to Figure 6 Understood. Figure 6 The communication network structure diagram shown includes M satellite orbits O1~O M Each satellite orbits N satellites are evenly distributed, that is, N satellites S are evenly distributed in satellite orbit O1. 11 ~S 1N N satellites S are evenly distributed in satellite orbit O2. 21 ~S 2N ... and so on, for any satellite orbit O j N satellites S are evenly distributed on the surface. j1 ~S jN , ..., satellite orbit O M N satellites S are evenly distributed on the surface. M1 ~S MN , 1≤j≤M.

[0066] Among them, arbitrary satellite orbit Oj N satellites S are evenly distributed on the surface. j1 ~S jN N satellites S j1 ~S jN Along the first cycle direction X shown in the diagram, each satellite has a co-orbit transmission channel with the next satellite in the same orbit. That is, satellite S j1 To satellite S j2 There is a co-track transmission channel C between them j1 Satellite S j2 To satellite S j3 There is a co-track transmission channel C between them j2 ... and so on, ... satellite S jN-1 To satellite S jN There is a co-track transmission channel C between them jN-1 Satellite S jN To satellite S j1 There is a co-track transmission channel C between them jN , 1≤j≤M.

[0067] When M≥3, there are N satellites S in satellite orbit O1. 11 ~S 1N With N satellites S in satellite orbit O2 21 ~S 2N One-to-one correspondence forms N inter-track communication channels I 11 ~I 1N Furthermore, the transmission directions of communication channels between adjacent tracks are opposite. For example... Figure 6 As shown, satellite S 11 With satellite S 21 Inter-orbit communication channel I 11 The transmission direction is determined by satellite S 11 Pointing to satellite S 21 Satellite S 12 With satellite S 22 Inter-orbit communication channel I 12 The transmission direction is determined by satellite S 22 Pointing to satellite S 12 ... and so on, ... satellite S 1N With satellite S 2N Inter-orbit communication channel I 1N The transmission direction is determined by satellite S 2N Pointing to satellite S 1N When 2≤j≤M-1, the orbit of the (j-1)th satellite is O j-1 N satellites S j-11 ~S j-1N With the j-th satellite orbit O j N satellites S j1 ~S jN A one-to-one correspondence is established between them to form N inter-track communication channels Ij-11 ~I j-1N The j-th satellite orbit O j N satellites S j1 ~S jN With the (j+1)th satellite orbit O j+1 N satellites S j+1 ~S j+N N inter-track communication channels I are formed between them j1 ~I jN Inter-orbit communication channel I j-11 ~I j-1N Inter-orbit communication channel I j1 ~I jN The transmission directions are identical in a one-to-one correspondence, that is, as shown in the example. Figure 6 Satellite S shown 1i ~S Mi Inter-track communication channels I formed sequentially between them 1i ~I M-1i They have the same transmission direction.

[0068] Corresponding to Figure 6 The communication network structure shown is as follows: Figure 5 Step S121 in the construction method shown may further include: when the current satellite orbit is not the first satellite orbit and the current satellite is the first satellite in the current satellite orbit, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the next satellite orbit is the same as the transmission direction of the inter-orbit communication channel between the first satellite in the previous satellite orbit of the current satellite orbit and the current satellite.

[0069] by Figure 6 Taking the communication network structure diagram shown as an example, when establishing the inter-orbit communication channel between the first satellite orbit O1 and the second satellite orbit O2, satellite S is randomly assigned... 11 With satellite S 21 Inter-orbit communication channel I 11 The transmission direction can be satellite S 11 Pointing to satellite S 21 It could also be satellite S. 21 Pointing to satellite S 11 Satellite S 12 With satellite S 22 Inter-orbit communication channel I 12 The transmission direction and inter-orbit communication channel I 11 The transmission direction is opposite, satellite S 13 With satellite S 23 Inter-orbit communication channel I 13 The transmission direction and inter-orbit communication channel I 12 The transmission direction is opposite, ..., and so on, ..., satellite S 1NWith satellite S 2N Inter-orbit communication channel I 1N The transmission direction and inter-orbit communication channel I 1N-1 The transmission direction is opposite;

[0070] When establishing the inter-orbit communication channel between the second satellite orbit O2 and the third satellite orbit O3, satellite S 21 With satellite S 31 Inter-orbit communication channel I 21 The transmission direction and inter-orbit communication channel I 11 The transmission directions are the same, that is, if the inter-track communication channel I... 11 The transmission direction is satellite S 11 Pointing to satellite S 21 Then the inter-orbit communication channel I 21 The transmission direction is satellite S 21 Pointing to satellite S 31 That is, if the inter-orbit communication channel I 11 The transmission direction is satellite S 21 Pointing to satellite S 11 Then the inter-orbit communication channel I 21 The transmission direction is satellite S 31 Pointing to satellite S 21 Satellite S 22 With satellite S 32 Inter-orbit communication channel I 22 The transmission direction and inter-orbit communication channel I 21 The transmission direction is opposite, satellite S 23 With satellite S 33 Inter-orbit communication channel I 23 The transmission direction and inter-orbit communication channel I 22 The transmission direction is opposite, ..., and so on, ..., satellite S 2N With satellite S 3N Inter-orbit communication channel I 2N The transmission direction and inter-orbit communication channel I 2N-1 The transmission direction is opposite;

[0071] Similarly, when 2≤j≤M-1, when establishing any j-th satellite orbit O j With the (j+1)th satellite orbit O j+1 When communicating via inter-orbit channels, satellite S j1 With satellite S j+11 Inter-orbit communication channel I j1 The transmission direction and inter-orbit communication channel I j-11 The transmission directions are the same, that is, if the inter-track communication channel I... j-11 The transmission direction is satellite S j-11 Pointing to satellite Sj1 Then the inter-orbit communication channel I j1 The transmission direction is satellite S j1 Pointing to satellite S j+11 That is, if the inter-orbit communication channel I j-11 The transmission direction is satellite S j1 Pointing to satellite S j-11 Then the inter-orbit communication channel I j1 The transmission direction is satellite S j+11 Pointing to satellite S j1 Satellite S j2 With satellite S j+12 Inter-orbit communication channel I j2 The transmission direction and inter-orbit communication channel I j1 The transmission direction is opposite, satellite S j3 With satellite S j+13 Inter-orbit communication channel I j3 The transmission direction and inter-orbit communication channel I j2 The transmission direction is opposite, ..., and so on, ..., satellite S jN With satellite S j+1N Inter-orbit communication channel I jN The transmission direction and inter-orbit communication channel I jN-1 The transmission direction is opposite.

[0072] To achieve bidirectional propagation, the communication network structure may also include a second wavelength transmission network. The second wavelength is not equal to the first wavelength. In a communication network structure based on the same Walker constellation, the propagation direction between any two satellites in the second wavelength transmission network is opposite to the propagation direction between corresponding two satellites in the first wavelength transmission network. That is, for any satellite in any orbit, the same-orbit transmission channel and inter-orbit communication channel in the first wavelength transmission network have corresponding same-orbit transmission channels and inter-orbit communication channels with opposite transmission directions in the second wavelength transmission network.

[0073] Figure 7 It shows the relationship with Figure 6 A schematic diagram of a second-wavelength transmission network based on the same Walker constellation communication network structure.

[0074] like Figure 7 As shown, arbitrary satellite orbit O j N satellites S are evenly distributed on the surface. j1 ~S jN N satellites S j1 ~S jN Along the second cycle direction Y shown in the diagram, each satellite has a co-orbital transmission channel with the next satellite. That is, satellite S j2 To satellite S j1 There is a co-track transmission channel C between themj1 Satellite S j3 To satellite S j2 There is a co-track transmission channel C between them j2 ... and so on, ... satellite S jN To satellite S jN-1 There is a co-track transmission channel C between them jN-1 Satellite S j1 To satellite S jN There is a co-track transmission channel C between them jN , 1≤j≤M.

[0075] The N inter-orbit communication channels formed by the one-to-one correspondence between N satellites in any two adjacent satellite orbits have the opposite transmission direction to the N inter-orbit communication channels corresponding to the first transmission wavelength. Figure 7 Any satellite orbit O shown j N satellites S j1 ~S jN Its adjacent satellite orbit O j+1 N satellites S j+11 ~S j+1N N inter-track communication channels I formed by one-to-one correspondence between them j1 ~I jN For example (1≤j≤M-1), Figure 7 N inter-track communication channels I j1 ~I jN and Figure 6 N inter-track communication channels I j1 ~I jN One-to-one correspondence is the opposite.

[0076] Correspondingly, the method for constructing a communication network structure may also include: constructing a second wavelength transmission network.

[0077] The steps for constructing the second wavelength transmission network are the same as those for constructing the first wavelength transmission network; please refer to [link / reference needed]. Figure 4 The flowchart shown illustrates the process of constructing the first wavelength transmission network, with the only difference being the reversed propagation direction in the refinement step S120.

[0078] For example, Figure 8 A partial flowchart of a method for constructing a communication network structure in one embodiment is shown to build a second wavelength transmission network.

[0079] like Figure 8 As shown, Figure 5 The step S121 shown corresponds to step S123: establishing a co-orbit transmission channel between the current satellite and the next satellite in the current satellite orbit. When the current satellite is the Nth satellite in the current satellite orbit, the next satellite is the first satellite in the current satellite orbit.

[0080] Figure 9 It shows the relationship with Figure 3 The diagram shows the second-wavelength transmission network structure corresponding to the communication network structure shown. Figure 9 As shown, the second cycle direction Y is for satellite S. 1N To S 11 Where M=2, for Figure 9 Any satellite S in the communication network structure shown ji j=1 or 2, 1≤i≤N. When i≠1, establish the current satellite S. ji In the current satellite orbit O j The next satellite S ji+1 Up to the current satellite S ji The same track transmission channel C between ji (like Figure 9 In the same track transmission channel C 1i and co-track transmission channel C 2i Satellite S ji+1 To satellite S ji The same track transmission channel C between ji The transmission direction is indicated by satellite S ji+1 Pointing to satellite S ji The communication channel; when i=N, the current satellite S ji For satellite orbit O j The Nth satellite S jN , combined Figure 1 It can be understood that N satellites in the same orbit are uniformly distributed around a spherical or circular orbit, and the Nth satellite in any orbit is adjacent to the first satellite in its orbit. Therefore, the satellite orbit O... j The Nth satellite S jN The next satellite will be in satellite orbit O j The first satellite S j1 Same-track transmission channel C jN The transmission direction is determined by satellite S j1 Pointing to satellite S jN .

[0081] like Figure 8 As shown, Figure 5The step S122 shown corresponds to step S124: When the current satellite orbit is not the Mth satellite orbit, an inter-orbit communication channel is established between the current satellite and the satellite at the same position in the next satellite orbit of the current satellite orbit. The transmission direction of the inter-orbit communication channel between the current satellite and the next satellite orbit is opposite to that of its adjacent inter-orbit communication channel. When the current satellite orbit is the first satellite orbit and the current satellite is the first satellite, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second satellite orbit is set to be opposite to the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second satellite orbit in the first wavelength transmission network.

[0082] The only difference between step S124 and step S122 is that when the current satellite is the first satellite in the first satellite orbit, the transmission direction of the inter-orbit communication channel cannot be randomly given, but needs to be opposite to the transmission direction of the corresponding inter-orbit communication channel in the first wavelength transmission network structure.

[0083] by Figure 9 Taking the communication network structure shown as an example, the second loop direction Y is the satellite S 1N To S 11 Where M=2, for Figure 9 Any satellite S in the communication network structure shown ji j=1 or 2, 1≤i≤N.

[0084] When j ≠ M, i.e., j = 1, establish the current satellite S. 1i Satellite S at the same position in the next satellite orbit O2 from the current satellite orbit O1 2i Inter-orbit communication channel I 1i .

[0085] Specifically, when i=1, it is necessary to determine the value based on the given information. Figure 3 Inter-track communication channel I in the first wavelength transmission network shown 11 Given Figure 9 Inter-track communication channel I shown 11 The direction of transmission, such as Figure 3 Inter-track communication channel I in the first wavelength transmission network shown 11 The transmission direction is satellite S 11 To satellite S 21 ,but Figure 9 Inter-track communication channel I in the second wavelength transmission network shown 11 The transmission direction should be satellite S 21 To satellite S 11 .

[0086] When i≠1, the inter-track communication channel I 1i The transmission direction and its adjacent inter-track communication channel I1i-1 The transmission directions are opposite. If adjacent inter-track communication channels I 1i-1 The transmission direction is satellite S 1i-1 Pointing to satellite S 2i-1 Then the inter-orbit communication channel I 1i The transmission direction is satellite S 2i Pointing to satellite S 1i If adjacent inter-track communication channels I 1i-1 The transmission direction is satellite S 2i-1 Pointing to satellite S 1i-1 Then the inter-orbit communication channel I 1i The transmission direction is satellite S 1i Pointing to satellite S 2i .

[0087] Corresponding to Figure 7 The communication network structure shown, step S123 of constructing the second wavelength transmission network may further include: when the current satellite orbit is not the first satellite orbit and the current satellite is the first satellite in the current satellite orbit, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the next satellite orbit is the same as the transmission direction of the inter-orbit communication channel between the first satellite in the previous satellite orbit of the current satellite orbit and the current satellite.

[0088] For reference Figure 7 When M≥3 and 2≤j≤M-1, the orbit of the (j-1)th satellite is O j-1 N satellites S j-11 ~S j-1N With the j-th satellite orbit O j N satellites S j1 ~S jN A one-to-one correspondence is established between them to form N inter-track communication channels I j-11 ~I j-1N The j-th satellite orbit O j N satellites S j1 ~S jN With the (j+1)th satellite orbit O j+1 N satellites S j+11 ~S j+1N N inter-track communication channels I are formed between them j1 ~I jN Inter-orbit communication channel I j-11 ~I j-1N Inter-orbit communication channel I j1 ~I jN The transmission directions are identical in a one-to-one correspondence, that is, as shown in the example. Figure 7 Satellite S shown 1i ~S Mi Inter-track communication channels I formed sequentially between them 1i ~IM-1i They have the same transmission direction.

[0089] Compared to Figure 8 The steps for constructing the second wavelength transmission network shown can be simplified as follows: For each satellite in each satellite orbit, establish corresponding co-orbit transmission channels and inter-orbit communication channels based on the second wavelength in the first wavelength transmission network. The transmission directions of the satellite based on the second wavelength co-orbit transmission channels and inter-orbit communication channels are opposite to the transmission directions of the co-orbit transmission channels and inter-orbit communication channels based on the first wavelength.

[0090] by Figure 7 Any satellite orbit O shown j Any satellite S on ji For example, satellite S ji The co-track transmission channels include C ji and C ji-1 Satellite S ji The inter-orbit communication channels include I ji and I j-1i ,like Figure 7 As shown, satellite S ji C-track transmission channel ji and C ji-1 respectively with Figure 6 Satellite S in ji C-track transmission channel ji and C ji-1 The transmission direction is opposite, satellite S ji The inter-orbit communication channels include I ji and I j-1i respectively with Figure 6 The inter-orbit communication channels in the middle include I ji and I j-1i The transmission direction is opposite.

[0091] Although the methods described above are illustrated and depicted as a series of actions for the sake of simplicity, it should be understood and appreciated that these methods are not limited by the order of the actions, as some actions may occur in a different order and / or concurrently with other actions from the illustrations and descriptions herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0092] According to another aspect of this application, a computer device is also provided.

[0093] Figure 10 A schematic block diagram of a computer device according to one embodiment is shown. Figure 10As shown, the computer device 10 includes a memory 11 and a processor 12. The memory 11 is used to store computer programs, and the processor 12 is connected to the memory 11. The processor 12 is configured to execute the computer programs on the memory 11. When the processor 12 executes the computer programs on the memory 11, it implements the method for constructing the communication network structure of the Walker constellation as described in any of the foregoing embodiments.

[0094] According to another aspect of this application, a computer-readable storage medium storing computer-executable instructions is also provided, which, when executed, implement a method for constructing a communication network structure of the Walker constellation as described in any embodiment.

[0095] According to another aspect of this application, a computer program product is also provided, the computer program product including computer-executable instructions that, when executed, implement a method for constructing a communication network structure of the Walker constellation as in any embodiment.

[0096] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps are described above in a generalized manner in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in different ways for each specific application, but such implementation decisions should not be construed as departing from the scope of the invention.

[0097] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or performed using a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, it may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0098] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor such that the processor can read and write information to / from the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and storage medium may reside as discrete components in the user terminal.

[0099] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functionality may be stored or transmitted as one or more instructions or code on or through a computer-readable medium. A computer-readable medium includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium accessible to a computer. By way of example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a computer.

[0100] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. However, it should be understood that the scope of protection of this invention should be determined by the appended claims and should not be limited to the specific structures and components of the embodiments described above. Various changes and modifications can be made to the embodiments by those skilled in the art within the spirit and scope of this invention, and these changes and modifications also fall within the scope of protection of this invention.

Claims

1. A communication network structure suitable for the Walker constellation, characterized in that, The Walker constellation comprises M satellite orbits arranged sequentially along the surface of a central celestial body, with N satellites evenly distributed in each orbit, where N is an even number, M ≥ 2, and N ≥ 4. The communication network structure includes a first wavelength transmission network, in which: Each orbit of N satellites has a co-orbital transmission channel with the next satellite in the first cycle direction. N satellites in any two adjacent satellite orbits form N inter-orbit communication channels in a one-to-one correspondence. Among the N inter-orbit communication channels, the transmission directions of adjacent inter-orbit communication channels are opposite.

2. The communication network structure as described in claim 1, characterized in that, When M≥3, any number of... j The satellite orbit and the first j +1 satellite orbits form N inter-orbit communication channels and the first j- 1 satellite orbit and the first j The transmission directions of the N inter-orbit communication channels formed between the satellite orbits are identical in a one-to-one correspondence. j ∈[2, M-1].

3. The communication network structure as described in claim 1 or 2, characterized in that, Also includes: A second wavelength transmission network, wherein the second wavelength is not equal to the first wavelength, in which: Each orbit of N satellites has a co-orbital transmission channel with the next satellite in a second cyclic direction, which is opposite to the first cyclic direction. The N inter-orbit communication channels formed between N satellites in any two adjacent satellite orbits have the opposite transmission direction to the N inter-orbit communication channels formed in the first wavelength transmission network.

4. A method for constructing a communication network structure for a Walker constellation, characterized in that, The Walker constellation comprises M satellite orbits arranged sequentially along the surface of a central celestial body, with N satellites evenly distributed in each orbit, where N is an even number, M ≥ 2, and N ≥ 4. The construction method includes establishing a first wavelength transmission network, which includes: Determine the current satellite's orbit within the Walker constellation and its position within that orbit; and Establishing a communication network for the current satellite based on its current orbit and its position within that orbit includes: Establish a co-orbit transmission channel between the current satellite and the next satellite in the current satellite orbit. When the current satellite is the Nth satellite in the current satellite orbit, the next satellite of the current satellite is the first satellite in the current satellite orbit. When the current satellite orbit is not the Mth satellite orbit, an inter-orbit communication channel is established between the current satellite and a satellite at the same position in the next satellite orbit of the current satellite orbit. The transmission direction of the inter-orbit communication channel between the current satellite and the next satellite orbit is opposite to that of its adjacent inter-orbit communication channel. When the current satellite orbit is the first satellite orbit and the current satellite is the first satellite, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite of the second satellite orbit is arbitrarily set.

5. The construction method as described in claim 4, characterized in that, When M≥3, and when the current satellite orbit is not the Mth satellite orbit, establishing an inter-orbit communication channel between the current satellite and satellites at the same position in the next satellite orbit of the current satellite orbit further includes: When the current satellite orbit is not the first satellite orbit and the current satellite is the first satellite in the current satellite orbit, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the next satellite orbit is the same as the transmission direction of the inter-orbit communication channel between the first satellite in the previous satellite orbit of the current satellite orbit and the current satellite.

6. The construction method as described in claim 4 or 5, characterized in that, It also includes establishing a second wavelength transmission network, where the second wavelength is not equal to the first wavelength. Establishing the second wavelength transmission network includes: Determine the current satellite's orbit within the Walker constellation and its position within that orbit; and Establishing a communication network for the current satellite based on its current orbit and its position within that orbit includes: Establish a co-orbit transmission channel between the current satellite and the next satellite in the current satellite orbit. When the current satellite is the Nth satellite in the current satellite orbit, the next satellite of the current satellite is the first satellite in the current satellite orbit. When the current satellite orbit is not the Mth satellite orbit, an inter-orbit communication channel is established between the current satellite and a satellite at the same position in the next satellite orbit of the current satellite orbit. The transmission direction of the inter-orbit communication channel between the current satellite and the next satellite orbit is opposite to that of its adjacent inter-orbit communication channel. When the current satellite orbit is the first satellite orbit and the current satellite is the first satellite, the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second satellite orbit is set to be opposite to the transmission direction of the inter-orbit communication channel between the current satellite and the first satellite in the second satellite orbit in the first wavelength transmission network.

7. The construction method as described in claim 4 or 5, characterized in that, It also includes establishing a second wavelength transmission network, where the second wavelength is not equal to the first wavelength. Establishing the second wavelength transmission network includes: For each satellite in each satellite orbit, corresponding co-orbit transmission channels and inter-orbit communication channels based on the second wavelength are established sequentially based on the co-orbit transmission channels and inter-orbit communication channels of the satellite in the first wavelength transmission network. The transmission directions of the satellite based on the co-orbit transmission channels and inter-orbit communication channels based on the second wavelength are opposite to the transmission directions of the co-orbit transmission channels and inter-orbit communication channels based on the first wavelength.

8. A computer device, comprising a memory and a processor connected to the memory, characterized in that, The memory is used to store a computer program, and the processor is configured to execute the computer program on the memory. When the processor executes the computer program, it implements the method for constructing the communication network structure of the Walker constellation as described in any one of claims 4 to 7.

9. A computer-readable storage medium storing computer-executable instructions, characterized in that, When the computer-executable instructions on the computer-readable storage medium are executed, they implement the method for constructing the communication network structure of the Walker constellation as described in any one of claims 4 to 7.

10. A computer program product, the computer program product comprising computer-executable instructions, characterized in that, When the computer-executable instructions are executed, they implement the method for constructing the communication network structure of the Walker constellation as described in any one of claims 4 to 7.

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