CN114285457B - Inter-satellite service transmission method and device, electronic equipment, medium and product - Google Patents
Inter-satellite service transmission method and device, electronic equipment, medium and product Download PDFInfo
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Abstract
The application provides an inter-satellite service transmission method, an inter-satellite service transmission device, electronic equipment, a medium and a product, wherein the method comprises the following steps: and receiving the service packet to be transmitted. If the service packet has a target satellite, determining a shortest path to the target satellite, and transmitting the service packet to a next node of the shortest path until the target satellite is reached. If the service packet does not have the destination satellite, determining the shortest path in paths of all the first satellites currently accessed to the earth station, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached. According to the scheme, each satellite of the constellation is addressed to transmit the service independently, and dynamic routing can be realized without complex operation.
Description
Technical Field
The present disclosure relates to the field of satellite communications, and in particular, to a method and apparatus for transmitting inter-satellite service, an electronic device, a medium, and a product.
Background
The low-rail-based satellite system has the characteristics of wide coverage, real-time communication, low power consumption and the like, can effectively supplement coverage blind areas of a ground communication network, and can effectively improve the data transmission problem of the blind areas of the offshore and air networks. At present, the low-rail-connected satellite base is widely applied to the fields of emergency communication rescue, environmental protection monitoring, meteorological monitoring, dangerous chemical transportation, aircraft tracking monitoring, earthquake monitoring and forecasting, smart city, smart sea, smart agriculture, oil gas pipeline network, electric power pipeline network monitoring, wild animal and plant protection and the like.
In the related art, the reverse slot exists in the polar orbit constellation in the low orbit things-connected satellite base system, so that the inter-satellite routing is complex, and the transmission time is prolonged. And the whole constellation is addressed as a whole by the constellation routing algorithm, so that the problems of poor dynamic adaptability and high complexity exist.
Disclosure of Invention
The application provides an inter-satellite service transmission method, an inter-satellite service transmission device, electronic equipment, media and products, and dynamic routing can be realized without complex operation.
In a first aspect, the present application provides a method for transmitting an inter-satellite service, including: receiving a service packet to be transmitted; if the service packet has a target satellite, determining a shortest path to the target satellite, and transmitting the service packet to a next node of the shortest path until the target satellite is reached; if the service packet does not have the destination satellite, determining the shortest path in paths of all the first satellites currently accessed to the earth station, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached.
In one possible implementation manner, if there is no destination satellite in the service packet, determining a shortest path among paths to all first satellites currently accessing the earth station includes: if the service packet does not have the target satellite, each first satellite currently accessed to the earth station is used as the target satellite, and the shortest path to the target satellite is determined; and taking the shortest path in the shortest paths of the target satellite as the final shortest path.
In one possible implementation, the determining the shortest path to the destination satellite includes: if the satellite and the target satellite are on the same orbit surface, determining a shortest path through a link between the same orbit satellites; if the self and the target satellite are not on the same orbit surface, judging whether the self has adjacent inter-satellite links; if adjacent inter-satellite links exist, determining the shortest path from the satellite to the target satellite through the adjacent inter-satellite links; if there is no adjacent inter-satellite link, determining the shortest path from itself to the target satellite through the adjacent inter-satellite link.
In one possible implementation manner, the receiving the service packet to be transmitted includes: receiving a service packet to be transmitted, wherein the service packet comprises a target satellite which is determined by an earth station according to the position information of a satellite terminal, and the target satellite is a satellite for establishing a user link with the satellite terminal; or receiving a service packet to be transmitted, wherein the service packet comprises a target satellite, the target satellite is a satellite for receiving the service packet through a user link, and the service packet is determined based on a first satellite corresponding to the shortest path in paths of all first satellites currently accessed to the earth station.
In one possible implementation, the satellites of the low orbit constellation comprise a plurality of satellites of a plurality of orbital planes; the method comprises the steps that satellites on the same orbit surface are connected through links between the satellites on the same orbit surface, each satellite on the same orbit surface is provided with 2 sets of links between the satellites on the same orbit surface, and the two-way communication is carried out by respectively connecting 2 satellites on the same orbit surface in opposite directions; 2 satellites are selected from each track surface, 2 inter-satellite links are respectively configured, and two adjacent track surfaces are respectively connected for bidirectional communication; the 2 satellites are back-up to each other with 0 ° < phase difference <90 °, or 90 ° < phase difference <180 °.
In one possible implementation manner, before the transmitting the service packet to the next node of the shortest path, the method further includes: detecting whether congestion occurs in the shortest path; and if congestion occurs to the shortest path, transmitting the service packet to the next node of the shortest path except the shortest path.
In a second aspect, the present application provides an inter-satellite traffic transmission device applied to a satellite of a low orbit constellation with an inclined orbit, including; the transmission module is used for receiving the service packet to be transmitted; the calculation module is used for determining the shortest path to the target satellite if the target satellite exists in the service packet, and transmitting the service packet to the next node of the shortest path until the target satellite is reached; and the calculation module is further used for determining the shortest path in the paths of all the first satellites currently accessed to the earth station if the service packet does not have the destination satellite, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached.
In one possible implementation manner, the calculating module is specifically configured to determine, if there is no destination satellite in the service packet, a shortest path to the destination satellite by using each first satellite currently accessed to the earth station as the destination satellite; the calculation module is specifically further configured to use a shortest path among shortest paths of the destination satellite as a final shortest path.
In one possible implementation manner, the calculation module is specifically configured to determine, if the calculation module is on the same orbit plane as the target satellite, a shortest path through the inter-same-orbit link; the calculation module is specifically further configured to determine whether an adjacent inter-satellite link exists between itself if the calculation module is not on the same orbit plane as the target satellite; if adjacent inter-satellite links exist, determining the shortest path from the satellite to the target satellite through the adjacent inter-satellite links; if there is no adjacent inter-satellite link, determining the shortest path from itself to the target satellite through the adjacent inter-satellite link.
In a possible implementation manner, the transmission module is specifically configured to receive a service packet to be transmitted, where the service packet includes a destination satellite, and the destination satellite is determined by an earth station according to location information of a satellite terminal, and the destination satellite is a satellite that establishes a user link with the satellite terminal; or the transmission module is specifically further configured to receive a service packet to be transmitted, where the service packet includes a destination satellite, and the destination satellite is a satellite that receives the service packet through a user link, and is determined based on a first satellite corresponding to a shortest path in paths of all first satellites currently accessing the earth station.
In one possible implementation, the apparatus further includes: the configuration module is used for connecting satellites on the same orbit surface through the links between the same orbit satellites, and each satellite on the same orbit surface is configured with 2 sets of links between the same orbit satellites, and is respectively connected with 2 satellites with opposite directions on the same orbit surface for bidirectional communication; the configuration module is also used for selecting 2 satellites from each track surface to respectively configure 2 inter-satellite links, and respectively connecting two adjacent track surfaces for bidirectional communication; the 2 satellites are back-up to each other with 0 ° < phase difference <90 °, or 90 ° < phase difference <180 °.
In one possible implementation, the apparatus further includes: the detection module is used for detecting whether congestion occurs in the shortest path; and the detection module is also used for transmitting the service packet to the next node of the shortest path except the shortest path if congestion occurs in the shortest path.
In a third aspect, the present application provides an electronic device, comprising: a processor, and a memory communicatively coupled to the processor; the memory stores computer-executable instructions; the processor executes computer-executable instructions stored in the memory to implement the method of any one of the first aspects.
In a fourth aspect, the present application provides a computer-readable storage medium having stored therein computer-executable instructions for performing the method of any of the first aspects by a processor.
In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the method according to any of the first aspects.
The inter-satellite service transmission method, device, electronic equipment, medium and product provided by the application receive service packets to be transmitted. If the service packet has a target satellite, determining a shortest path to the target satellite, and transmitting the service packet to a next node of the shortest path until the target satellite is reached. If the service packet does not have the destination satellite, determining the shortest path in paths of all the first satellites currently accessed to the earth station, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached. According to the scheme, each satellite of the constellation is addressed to transmit the service independently, and dynamic routing can be realized without complex operation.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is an application scenario schematic diagram of an inter-satellite service transmission method provided in an embodiment of the present application;
fig. 2 is a flow chart of an inter-satellite service transmission method according to a first embodiment of the present application;
fig. 3 is an example of a slant-track low-track constellation configuration provided in an embodiment of the present application;
fig. 4 is an example of inter-satellite link configuration provided in an embodiment of the present application;
fig. 5 is an example of an inter-satellite routing flowchart provided in an embodiment of the present application;
fig. 6 is a diagram illustrating a structure of an inter-satellite service transmission device according to a second embodiment of the present application;
fig. 7 is a device block diagram of an inter-satellite service transmission device according to a third embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
First, the terms involved are explained:
reverse stitching; two adjacent orbits appear in the polar orbit satellite, the movement directions of the satellites running on the two orbits are opposite, the region between the two orbits is called a reverse slot, and the satellites on two sides of the reverse slot cannot directly transmit data;
flooding: transmitting a data stream received from a certain interface to all interfaces except the interface;
forward traffic: transmitting user traffic and signaling signals from the base station to the subscriber station;
reverse traffic: traffic from subscriber stations to base stations.
Fig. 1 is a schematic application scenario of an inter-satellite service transmission method provided in an embodiment of the present application, as shown in fig. 1, where the scenario includes: a user terminal 1, a service data center 2 and a satellite 3.
Examples are given in connection with the illustrated scenario: the user terminal 1 establishes connection with the satellite 3 through a user link, the service data center 2 establishes connection with the satellite 3 through a feed link, and the satellite 3 is connected with the satellite 3 through an inter-satellite link. And the service packet is forwarded between the user 1 and the service data center 2 through the satellite 3 to realize service transmission.
The following examples are presented to illustrate aspects of embodiments of the present application in connection with the following examples.
Example 1
Fig. 2 is a flow chart of an inter-satellite service transmission method according to an embodiment of the present application, where the method includes the following steps:
s101, receiving a service packet to be transmitted;
s102, if a target satellite exists in the service packet, determining the shortest path to the target satellite, and transmitting the service packet to a next node of the shortest path until the target satellite is reached;
and S103, if no destination satellite exists in the service packet, determining the shortest path in paths of all first satellites currently accessed to the earth station, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached.
As an example, the execution subject of this embodiment may be an inter-satellite traffic transmission device, and there are various implementations of the inter-satellite traffic transmission device. For example, the program may be software, or a medium storing a related computer program, such as a usb disk; alternatively, the apparatus may be a physical device, such as a chip, a smart terminal, a computer, a server, etc., in which the relevant computer program is integrated or installed.
In practical applications, the service packet to be transmitted may be received from the earth station, or may be received from the satellite terminal, and the receiving of the service packet to be transmitted is described in the following by way of example with reference to a plurality of examples.
In one example, the inter-satellite service transmission method further includes: the satellites on the same orbit are connected through links between the satellites on the same orbit, each satellite on the same orbit is provided with 2 sets of links between the same orbit, and the two sets of links between the satellites on the same orbit are respectively connected with 2 satellites on the same orbit in opposite directions for bidirectional communication; 2 satellites are selected from each track surface, 2 inter-satellite links are respectively configured, and two adjacent track surfaces are respectively connected for bidirectional communication; the 2 satellites are back-up to each other with 0 ° < phase difference <90 °, or 90 ° < phase difference <180 °.
As for the scene examples, as shown in fig. 3 and 4, fig. 3 is an oblique orbit low orbit constellation configuration example, and fig. 4 is an inter-satellite link configuration example. The low-orbit things-to-nothing satellite base system consists of N satellites distributed on M orbit planes, earth stations, service data centers, satellite terminals, internet users and the like, wherein each satellite is fixedly provided with 4 neighbor satellite nodes, 2 satellites are positioned on adjacent orbit planes, and 2 satellites are positioned on the same orbit plane. Satellite number < i j >, i denotes the track number and j denotes the number of the satellite in the track. Each star is provided with 2 sets of inter-satellite link terminals with inter-satellite link numbers of 1 and 2, and the inter-satellite link terminals are respectively in bidirectional communication with the front and rear satellites with the same orbit. Each track surface selects 2 satellites (which are backup, 0 degree < phase difference <90 degrees or 90 degrees < phase difference <180 degrees) and is respectively provided with 2 inter-satellite links, the inter-satellite links are numbered as inter-satellite 3 and inter-satellite 4, and the inter-satellite links are respectively in bidirectional communication with adjacent two track neighbor nodes.
Based on the above embodiments, the satellites of the plurality of orbit planes are connected through the inter-orbit link and the inter-orbit link, thereby realizing the transmission of the service packet to any one satellite. 2 satellites are selected for each track surface to configure inter-satellite links, and 2 satellites are backed up, so that the inter-satellite link faults can be dealt with, and the method is simple and easy to realize.
In one example, S101 may specifically include: receiving a service packet to be transmitted from an earth station; the service packets are transmitted by a service data center to the earth station.
By combining with a scene example, the service data center connects the earth station and the user in a wired mode, and if the service data center needs to send a service instruction to the user, whether the target user establishes wired connection with the service data center is judged. If the destination user establishes wired connection with the service center, the service packet is directly transmitted through the network cable. If the destination user does not establish wired connection with the service center, the service packet is transmitted to the earth station, and the earth station forwards the service packet to the satellite terminal of the user through the satellite.
In one example, S101 may specifically further include: a service packet to be transmitted is received from a satellite terminal.
In combination with a scenario example, if the satellite terminal corresponds to a user and the user needs to send data to the service data center, the satellite terminal of the user forwards the service packet containing the data to the earth station through the satellite, and the earth station sends the service packet to the service data center. If the user needs to send data to other users, the service package containing the data is forwarded to the earth station through the satellite terminal, and the earth station sends the service package to the service data center. And then the service data center transmits the service packet to the earth station according to the target user in the service, and the earth station forwards the service packet to the satellite terminal corresponding to the target user through the satellite.
Based on the above embodiments, the corresponding transmission mode may be determined in a targeted manner according to the service type of the service packet.
In one example, S102 may specifically include: calculating to obtain an optional path according to a target satellite in the service packet; selecting a shortest path from the selectable paths; the shortest path is the path with the shortest transmission distance; and transmitting the service packet to the next node of the shortest path until the target satellite is reached.
By way of example of a scenario, satellites of a low orbit constellation are connected by a plurality of inter-satellite links, and there may be multiple paths for traffic packet transmissions. And calculating all the optional paths which can be transmitted to the target satellite according to the position of the target satellite in the service packet, and obtaining an optional path list. And the selectable path list is arranged in ascending order according to the distance to obtain the shortest path. And transmitting the service packets to the satellite nodes included in the shortest path in sequence through the shortest path.
Based on the above embodiment, the shortest path can be dynamically selected to transmit the service packet, thereby reducing the time delay.
In one example, S103 may specifically include: and if the service packet does not have the destination satellite, taking each first satellite currently accessed to the earth station as the destination satellite, and determining the shortest path to the destination satellite.
Alternatively, there may be multiple earth stations, each of which is connected to a corresponding satellite, that is, the first satellite, through a feeder link. When the earth station is connected with the satellite through the feed link, the number and the position information of the accessed first satellite are transmitted to all satellites in the low orbit constellation of the inclined orbit through a flooding method, and all satellites can automatically inquire the number and the position information of the first satellite.
In combination with the scene example, if no target satellite exists in the service packet, calculating the optional paths to all the first satellites to obtain an optional path list. And the selectable path list is arranged in ascending order according to the distance to obtain the shortest path. The service packets are transmitted to a first satellite according to the shortest path, the first satellite transmitting the service packets to the earth station.
Based on the above embodiment, the objective satellite can be dynamically determined, and the shortest path is dynamically selected to transmit the service packet, so that the time delay is reduced.
In one example, determining the shortest path to the destination satellite specifically includes: if the satellite and the target satellite are on the same orbit surface, determining a shortest path through a link between the same orbit satellites; if the self and the target satellite are not on the same orbit surface, judging whether the self has adjacent inter-satellite links; if adjacent inter-satellite links exist, determining the shortest path from the satellite to the target satellite through the adjacent inter-satellite links; if there is no adjacent inter-satellite link, determining the shortest path from itself to the target satellite through the adjacent inter-satellite link.
For example, assume that the source satellite node number satellite < i j >, the destination satellite number < k m >, the satellite < i j > and the inter-satellite 1 reachable with the inter-satellite link configured with the inter-satellite link are < i h >, and the inter-satellite 2 reachable with the inter-satellite link configured with the inter-satellite link is < i n >.
If satellites < i j >, < k m > are out-of-orbit satellites, the shortest path calculation formula corresponding to the selectable path is as follows:
path 1 (corresponding to inter-star 1) = { if h > j, take h-j; if h is less than j, N/M- |h-j|min { |i-k|, M- |i-k|min { |h-m|, N/M- |h-m|are taken
Path 2 (corresponding inter-star 2) = { if j > n, take j-n; if j is less than N, N/M- |j-n|j-n|min { |i-k|, M- |i-k|min { |n-m|, N/M- |n-m|min { |n-M }, and the like are taken
Path 3 (corresponding inter-star 3) = { if i > k, take i-k; if i is less than k, M- |i-k| } +min { |j-m|, N/M- |j-m| }, and the method is that
Path 4 (corresponding inter-star 4) = { if i < k, take i-k|; if i is greater than k, M- |i-k| } +min { |j-m|, N/M- |j-m| }, and then taking the formula of the formula
If satellites < i j >, < k m > are co-orbiting satellites, the shortest path calculation formula corresponding to the selectable path is as follows:
path 1 (corresponding to inter-star 1) = { if m > j, take m-j; if M is less than j, N/M-M-j }, where N is equal to M
Path 2 (corresponding inter-star 2) = { if j > m, take j-m; if j is less than M, N/M- |j-m| }, then
Based on the above embodiment, the shortest path can be calculated according to the formula according to whether the shortest path is on the same track surface, so as to obtain an accurate calculation result.
In one example, receiving a service packet to be transmitted specifically includes: receiving a service packet to be transmitted, wherein the service packet comprises a target satellite which is determined by an earth station according to the position information of a satellite terminal, and the target satellite is a satellite for establishing a user link with the satellite terminal; or receiving a service packet to be transmitted, wherein the service packet comprises a target satellite, the target satellite is a satellite for receiving the service packet through a user link, and the service packet is determined based on a first satellite corresponding to the shortest path in paths of all first satellites currently accessed to the earth station.
For example, if the service data center transmits a forward service to a user, determining a satellite establishing a user link with a satellite terminal according to position information of the satellite terminal corresponding to the user as a target satellite; if the satellite terminal sends reverse service to the service data center, selecting a first satellite with the shortest path in the first satellites which have established feed links with the earth station as a target satellite; if the satellite terminal sends the service to other users, the service packet is firstly transmitted to the service data center, and then the service packet is transmitted to other satellite terminals.
Based on the above embodiment, the corresponding destination satellite can be determined according to different service types, and then the shortest transmission path of the service packet is determined, so that dynamic routing is realized, and transmission delay is reduced.
In one example, the inter-satellite service transmission method further includes: detecting whether congestion occurs in the shortest path; and if congestion occurs to the shortest path, transmitting the service packet to the next node of the shortest path except the shortest path.
In combination with the scene example, inter-satellite traffic transmission causes congestion between two satellites due to the problems of large transmission quantity and the like, and the transmission delay is increased. The method and the device can detect whether the current shortest path is congested in real time, and if so, the method and the device switch to the next satellite of the shortest path except the shortest path for transmission.
Based on the above embodiment, the congestion condition of the shortest path can be detected in real time, and the service packet transmission path is dynamically switched, so that the service packet transmission efficiency is ensured.
For ease of understanding, fig. 5 is an exemplary inter-satellite routing flowchart, as shown in fig. 5:
a. source satellite node: i.e., the first satellite node in the transmission of service packets, which receives service packets from the feeder link or the subscriber link; judging whether the service packet is provided with a target satellite node number or not; if yes, calculating an optional path to a target satellite node, and selecting a shortest path for forwarding; if not, calculating the optional paths from the satellite to all the satellite nodes accessing the earth station, selecting the shortest path for forwarding, confirming the corresponding satellite as the target satellite node, and filling the serial number information into the service packet.
b. Intermediate satellite nodes: such satellite nodes receive a service packet from a last satellite node of the inter-satellite link, the service packet including a destination satellite node number; judging whether the satellite node has an inter-satellite link or not; if yes, calculating the optional path from the satellite node to the target satellite node, and selecting the shortest path for forwarding; if not, another inter-satellite link forwarding service packet is selected. For the next intermediate satellite node that receives the service packet, a similar procedure is performed until the destination satellite node is reached.
c. Destination satellite node: the satellite node receives service packets from inter-satellite links; and selecting a feed link or a user link to send service packets according to the destination terminal address.
Optionally, in the route switching process, if the selected shortest path is congested, a suboptimal path is selected for transmission. It should be noted that the above-mentioned flow is merely an example of the solution, and the embodiments are not limited thereto.
In the inter-satellite service transmission method provided in this embodiment, a service packet to be transmitted is received. If the service packet has a target satellite, determining a shortest path to the target satellite, and transmitting the service packet to a next node of the shortest path until the target satellite is reached. If the service packet does not have the destination satellite, determining the shortest path in paths of all the first satellites currently accessed to the earth station, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached. According to the scheme, each satellite of the constellation is addressed to transmit the service independently, and dynamic routing can be realized without complex operation.
Example two
Fig. 6 is a schematic structural diagram of an inter-satellite service transmission device according to a second embodiment of the present application, as shown in fig. 6, where the inter-satellite service transmission device includes:
a transmission module 61, configured to receive a service packet to be transmitted;
a calculation module 62, configured to determine a shortest path to a destination satellite if the service packet includes the destination satellite, and transmit the service packet to a node next to the shortest path until the destination satellite is reached;
the calculation module 62 is further configured to determine a shortest path among paths to all first satellites currently accessing the earth station if there is no destination satellite in the service packet, package the first satellite corresponding to the shortest path as the destination satellite into the service packet, and transmit the service packet to a node next to the shortest path until the destination satellite is reached.
In practical applications, the service packet to be transmitted may be received from the earth station, or may be received from the satellite terminal, and the receiving of the service packet to be transmitted is described in the following by way of example with reference to a plurality of examples.
In one example, the inter-satellite service transmission device further includes a configuration module 63, configured to connect satellites on a common orbit through inter-satellite links, where each satellite on the common orbit configures 2 sets of inter-satellite links, and connects 2 satellites with opposite directions on the common orbit respectively for bidirectional communication; 2 satellites are selected from each track surface, 2 inter-satellite links are respectively configured, and two adjacent track surfaces are respectively connected for bidirectional communication; the 2 satellites are back-up to each other with 0 ° < phase difference <90 °, or 90 ° < phase difference <180 °.
As for the scene examples, as shown in fig. 3 and 4, fig. 3 is an oblique orbit low orbit constellation configuration example, and fig. 4 is an inter-satellite link configuration example. The low-orbit things-to-nothing satellite base system consists of N satellites distributed on M orbit planes, earth stations, service data centers, satellite terminals, internet users and the like, wherein each satellite is fixedly provided with 4 neighbor satellite nodes, 2 satellites are positioned on adjacent orbit planes, and 2 satellites are positioned on the same orbit plane. Satellite number < i j >, i denotes the track number and j denotes the number of the satellite in the track. Each star is provided with 2 sets of inter-satellite link terminals with inter-satellite link numbers of 1 and 2, and the inter-satellite link terminals are respectively in bidirectional communication with the front and rear satellites with the same orbit. Each track surface selects 2 satellites (which are backup, 0 degree < phase difference <90 degrees or 90 degrees < phase difference <180 degrees) and is respectively provided with 2 inter-satellite links, the inter-satellite links are numbered as inter-satellite 3 and inter-satellite 4, and the inter-satellite links are respectively in bidirectional communication with adjacent two track neighbor nodes.
Based on the above embodiments, the satellites of the plurality of orbit planes are connected through the inter-orbit link and the inter-orbit link, thereby realizing the transmission of the service packet to any one satellite. 2 satellites are selected for each track surface to configure inter-satellite links, and 2 satellites are backed up, so that the inter-satellite link faults can be dealt with, and the method is simple and easy to realize.
In one example, the transmission module 61 is specifically configured to receive a service packet to be transmitted from the earth station; the service packets are transmitted by a service data center to the earth station.
By combining with a scene example, the service data center connects the earth station and the user in a wired mode, and if the service data center needs to send a service instruction to the user, whether the target user establishes wired connection with the service data center is judged. If the destination user establishes wired connection with the service center, the service packet is directly transmitted through the network cable. If the destination user does not establish wired connection with the service center, the service packet is transmitted to the earth station, and the earth station forwards the service packet to the satellite terminal through the satellite.
In one example, the transmission module 61 is specifically further configured to receive a service packet to be transmitted from a satellite terminal.
In combination with a scenario example, if the satellite terminal corresponds to a user, and the user needs to send data to the service data center, the satellite terminal forwards the service packet containing the data to the earth station through the satellite, and the earth station sends the service packet to the service data center. If the user needs to send data to other users, the service package containing the data is forwarded to the earth station through the satellite terminal, and the earth station sends the service package to the service data center. And then the service data center transmits the service packet to the earth station according to the target user in the service, and the earth station forwards the service packet to the satellite terminal corresponding to the target user through the satellite.
Based on the above embodiments, the corresponding transmission mode may be determined in a targeted manner according to the service type of the service packet.
In one example, the calculating module 62 is specifically configured to calculate an optional path according to a destination satellite in the service packet; selecting a shortest path from the selectable paths; the shortest path is the path with the shortest transmission distance; and transmitting the service packet to the next node of the shortest path until the target satellite is reached.
By way of example of a scenario, satellites of a low orbit constellation are connected by a plurality of inter-satellite links, and there may be multiple paths for traffic packet transmissions. And calculating all the optional paths which can be transmitted to the target satellite according to the position of the target satellite in the service packet, and obtaining an optional path list. And the selectable path list is arranged in ascending order according to the distance to obtain the shortest path. And transmitting the service packets to the satellite nodes included in the shortest path in sequence through the shortest path.
Based on the above embodiment, the shortest path can be dynamically selected to transmit the service packet, thereby reducing the time delay.
In one example, the calculating module 62 is specifically configured to determine, if there is no destination satellite in the service packet, a shortest path to the destination satellite using each first satellite currently accessing the earth station as the destination satellite.
Alternatively, there may be multiple earth stations, each of which is connected to a corresponding satellite, that is, the first satellite, through a feeder link. When the earth station is connected with the satellite through the feed link, the number and the position information of the accessed first satellite are transmitted to all satellites in the low orbit constellation of the inclined orbit through a flooding method, and all satellites can automatically inquire the number and the position information of the first satellite.
In combination with the scene example, if no target satellite exists in the service packet, calculating the optional paths to all the first satellites to obtain an optional path list. And the selectable path list is arranged in ascending order according to the distance to obtain the shortest path. The service packets are transmitted to a first satellite according to the shortest path, the first satellite transmitting the service packets to the earth station.
Based on the above embodiment, the objective satellite can be dynamically determined, and the shortest path is dynamically selected to transmit the service packet, so that the time delay is reduced.
In one example, the calculation module 62 is specifically configured to determine the shortest path through the inter-orbital link if itself is on the same orbital plane as the target satellite; if the self and the target satellite are not on the same orbit surface, judging whether the self has adjacent inter-satellite links; if adjacent inter-satellite links exist, determining the shortest path from the satellite to the target satellite through the adjacent inter-satellite links; if there is no adjacent inter-satellite link, determining the shortest path from itself to the target satellite through the adjacent inter-satellite link.
For example, assume that the source satellite node number satellite < i j >, the destination satellite number < k m >, the satellite < i j > and the inter-satellite 1 reachable with the inter-satellite link configured with the inter-satellite link are < i h >, and the inter-satellite 2 reachable with the inter-satellite link configured with the inter-satellite link is < i n >.
If satellites < i j >, < k m > are out-of-orbit satellites, the shortest path calculation formula corresponding to the selectable path is as follows:
path 1 (corresponding to inter-star 1) = { if h > j, take h-j; if h is less than j, N/M- |h-j|min { |i-k|, M- |i-k|min { |h-m|, N/M- |h-m|are taken
Path 2 (corresponding inter-star 2) = { if j > n, take j-n; if j is less than N, N/M- |j-n|j-n|min { |i-k|, M- |i-k|min { |n-m|, N/M- |n-m|min { |n-M }, and the like are taken
Path 3 (corresponding inter-star 3) = { if i > k, take i-k; if i is less than k, M- |i-k| } +min { |j-m|, N/M- |j-m| }, and the method is that
Path 4 (corresponding inter-star 4) = { if i < k, take i-k|; if i is greater than k, M- |i-k| } +min { |j-m|, N/M- |j-m| }, and then taking the formula of the formula
If satellites < i j >, < k m > are co-orbiting satellites, the shortest path calculation formula corresponding to the selectable path is as follows:
path 1 (corresponding to inter-star 1) = { if m > j, take m-j; if M is less than j, N/M-M-j }, where N is equal to M
Path 2 (corresponding inter-star 2) = { if j > m, take j-m; if j is less than M, N/M- |j-m| }, then
Based on the above embodiment, the shortest path can be calculated according to the formula according to whether the shortest path is on the same track surface, so as to obtain an accurate calculation result.
In one example, the transmission module 61 is further configured to receive a service packet to be transmitted, where the service packet includes a destination satellite, where the destination satellite is determined by an earth station according to location information of a satellite terminal, and the destination satellite is a satellite that establishes a user link with the satellite terminal; or receiving a service packet to be transmitted, wherein the service packet comprises a target satellite, the target satellite is a satellite for receiving the service packet through a user link, and the service packet is determined based on a first satellite corresponding to the shortest path in paths of all first satellites currently accessed to the earth station.
For example, if the service data center transmits a forward service to a user, determining a satellite establishing a user link with a satellite terminal according to position information of the satellite terminal corresponding to the user as a target satellite; if the satellite terminal sends reverse service to the service data center, selecting a first satellite with the shortest path in the first satellites which have established feed links with the earth station as a target satellite; if the satellite terminal sends the service to other users, the service packet is firstly transmitted to the service data center, and then the service packet is transmitted to other satellite terminals.
Based on the above embodiment, the corresponding destination satellite can be determined according to different service types, and then the shortest transmission path of the service packet is determined, so that dynamic routing is realized, and transmission delay is reduced.
In one example, the inter-satellite traffic transmission device further includes a detection module 64 for detecting whether congestion occurs in the shortest path; and if congestion occurs to the shortest path, transmitting the service packet to the next node of the shortest path except the shortest path.
In combination with the scene example, inter-satellite traffic transmission causes congestion between two satellites due to the problems of large transmission quantity and the like, and the transmission delay is increased. The method and the device can detect whether the current shortest path is congested in real time, and if so, the method and the device switch to the next satellite of the shortest path except the shortest path for transmission.
Based on the above embodiment, the congestion condition of the shortest path can be detected in real time, and the service packet transmission path is dynamically switched, so that the service packet transmission efficiency is ensured.
In the inter-satellite service transmission device provided in this embodiment, a transmission module is configured to receive a service packet to be transmitted. And the calculation module is used for determining the shortest path to the target satellite if the target satellite exists in the service packet, and transmitting the service packet to the next node of the shortest path until the target satellite is reached. And the calculation module is further used for determining the shortest path in the paths of all the first satellites currently accessed to the earth station if the service packet does not have the destination satellite, packaging the first satellite corresponding to the shortest path into the service packet as the destination satellite, and transmitting the service packet to the next node of the shortest path until the destination satellite is reached. According to the scheme, each satellite of the constellation is addressed to transmit the service independently, and dynamic routing can be realized without complex operation.
Example III
Fig. 7 is a block diagram of an apparatus, which may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, etc., for illustrating an inter-satellite traffic transmission apparatus according to an exemplary embodiment.
The apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the apparatus 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interactions between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power supply component 806 provides power to the various components of the device 800. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 800.
The multimedia component 808 includes a screen between the device 800 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 800 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the apparatus 800. For example, the sensor assembly 814 may detect an on/off state of the device 800, a relative positioning of the components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, an orientation or acceleration/deceleration of the device 800, and a change in temperature of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communication between the apparatus 800 and other devices, either in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 804 including instructions executable by processor 820 of apparatus 800 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
Example IV
Fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application, as shown in fig. 8, where the electronic device includes:
a processor 291, the electronic device further comprising a memory 292; a communication interface (Communication Interface) 293 and bus 294 may also be included. The processor 291, the memory 292, and the communication interface 293 may communicate with each other via the bus 294. Communication interface 293 may be used for information transfer. The processor 291 may call logic instructions in the memory 294 to perform the methods of the above embodiments.
Further, the logic instructions in memory 292 described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product.
The memory 292 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present application. The processor 291 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 292, i.e., implements the methods of the method embodiments described above.
Embodiments of the present application provide a non-transitory computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, are configured to implement a method as described in the previous embodiments.
Embodiments of the present application provide a computer program product comprising a computer program which, when executed by a processor, implements a method as described in the previous embodiments.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (12)
1. An inter-satellite service transmission method is characterized by being applied to satellites of a low orbit constellation in an inclined orbit, and comprises the following steps:
receiving a service packet to be transmitted;
if the service packet has a target satellite, determining a shortest path to the target satellite, and transmitting the service packet to a next node of the shortest path until the target satellite is reached;
if the service packet does not have a target satellite, determining the shortest path in paths of all first satellites currently accessed to an earth station, packaging the first satellite corresponding to the shortest path into the service packet as the target satellite, and transmitting the service packet to the next node of the shortest path until the target satellite is reached;
the satellites of the low orbit constellation of the inclined orbit include a plurality of satellites of a plurality of orbit planes; wherein,,
the satellites on the same orbit are connected through links between the satellites on the same orbit, each satellite on the same orbit is provided with 2 sets of links between the same orbit, and the two sets of links between the satellites on the same orbit are respectively connected with 2 satellites on the same orbit in opposite directions for bidirectional communication;
2 satellites are selected from each track surface, 2 inter-satellite links are respectively configured, and two adjacent track surfaces are respectively connected for bidirectional communication; the 2 satellites are back-up to each other with 0 ° < phase difference <90 °, or 90 ° < phase difference <180 °.
2. The method of claim 1, wherein determining the shortest path among paths to all first satellites currently accessing the earth station if there is no destination satellite in the service packet comprises:
if the service packet does not have the target satellite, each first satellite currently accessed to the earth station is used as the target satellite, and the shortest path to the target satellite is determined;
and taking the shortest path in the shortest paths of the target satellite as the final shortest path.
3. The method according to claim 1 or 2, wherein said determining the shortest path to the destination satellite comprises:
if the satellite and the target satellite are on the same orbit surface, determining a shortest path through a link between the same orbit satellites;
if the self and the target satellite are not on the same orbit surface, judging whether the self has adjacent inter-satellite links; if adjacent inter-satellite links exist, determining the shortest path from the satellite to the target satellite through the adjacent inter-satellite links; if there is no adjacent inter-satellite link, determining the shortest path from itself to the target satellite through the adjacent inter-satellite link.
4. The method of claim 1, wherein the receiving the service packet to be transmitted comprises:
receiving a service packet to be transmitted, wherein the service packet comprises a target satellite which is determined by an earth station according to the position information of a satellite terminal, and the target satellite is a satellite for establishing a user link with the satellite terminal; or,
and receiving a service packet to be transmitted, wherein the service packet comprises a target satellite, the target satellite is a satellite for receiving the service packet through a user link, and the service packet is determined based on a first satellite corresponding to the shortest path in paths of all first satellites currently accessed to the earth station.
5. The method according to claims 1-4, wherein before said transmitting said service packet to a next node of said shortest path, further comprising:
detecting whether congestion occurs in the shortest path;
and if congestion occurs to the shortest path, transmitting the service packet to the next node of the shortest path except the shortest path.
6. An inter-satellite traffic transmission device, for use with a low orbit constellation of oblique orbits, comprising:
the transmission module is used for receiving the service packet to be transmitted;
the calculation module is used for determining the shortest path to the target satellite if the target satellite exists in the service packet, and transmitting the service packet to the next node of the shortest path until the target satellite is reached;
The calculation module is further configured to determine a shortest path among paths to all first satellites currently connected to the earth station if the service packet has no destination satellite, package the first satellite corresponding to the shortest path as the destination satellite into the service packet, and transmit the service packet to a next node of the shortest path until the destination satellite is reached;
the apparatus further comprises:
the configuration module is used for connecting satellites on the same orbit surface through the links between the same orbit satellites, and each satellite on the same orbit surface is configured with 2 sets of links between the same orbit satellites, and is respectively connected with 2 satellites with opposite directions on the same orbit surface for bidirectional communication;
the configuration module is also used for selecting 2 satellites from each track surface to respectively configure 2 inter-satellite links, and respectively connecting two adjacent track surfaces for bidirectional communication; the 2 satellites are back-up to each other with 0 ° < phase difference <90 °, or 90 ° < phase difference <180 °.
7. The apparatus of claim 6, wherein the device comprises a plurality of sensors,
the computing module is specifically configured to determine, if there is no destination satellite in the service packet, a shortest path to the destination satellite by using each first satellite currently accessed to the earth station as the destination satellite;
The calculation module is specifically further configured to use a shortest path among shortest paths of the destination satellite as a final shortest path.
8. The apparatus according to claim 6 or 7, wherein,
the calculation module is specifically used for determining the shortest path through the inter-same-orbit link if the calculation module and the target satellite are on the same orbit surface;
the calculation module is specifically further configured to determine whether an adjacent inter-satellite link exists between itself if the calculation module is not on the same orbit plane as the target satellite; if adjacent inter-satellite links exist, determining the shortest path from the satellite to the target satellite through the adjacent inter-satellite links; if there is no adjacent inter-satellite link, determining the shortest path from itself to the target satellite through the adjacent inter-satellite link.
9. The apparatus of claim 6, wherein the device comprises a plurality of sensors,
the transmission module is specifically configured to receive a service packet to be transmitted, where the service packet includes a destination satellite, the destination satellite is determined by an earth station according to position information of a satellite terminal, and the destination satellite is a satellite that establishes a user link with the satellite terminal; or,
the transmission module is specifically further configured to receive a service packet to be transmitted, where the service packet includes a destination satellite, and the destination satellite is a satellite that receives the service packet through a user link, and is determined based on a first satellite corresponding to a shortest path in paths of all first satellites currently accessing the earth station.
10. The apparatus according to claims 6-9, characterized in that the apparatus further comprises:
the detection module is used for detecting whether congestion occurs in the shortest path;
and the detection module is also used for transmitting the service packet to the next node of the shortest path except the shortest path if congestion occurs in the shortest path.
11. An electronic device, comprising: a processor, and a memory communicatively coupled to the processor;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored in the memory to implement the method of any one of claims 1-5.
12. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-5.
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