CN114430295A - Satellite network link fault processing method, device, equipment and storage medium - Google Patents
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Abstract
The application relates to a satellite network link fault processing method, a satellite network link fault processing device and a storage medium. The method comprises the following steps: acquiring a real-time inter-satellite routing snapshot; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network; determining a plurality of non-overlapping paths between a message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite; determining a current optimal path corresponding to the message sending satellite from a plurality of non-overlapping paths based on the inter-satellite link mapping; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping. By adopting the method, the satellite which has faults before can be effectively avoided, the simultaneous or sequential occurrence of a plurality of faults can be supported, and the timeliness and the multi-fault property of satellite network communication can be considered.
Description
Technical Field
The present application relates to the field of satellite network communication technologies, and in particular, to a method and an apparatus for processing a satellite network link failure, a computer device, and a storage medium.
Background
With the development of satellite network communication technology, LEO (Low-orbit) satellites are widely used for real-time large-flow transmission. LEO satellite has fast moving characteristic (relative ground speed exceeds 25000km/h), and the ground classical distributed algorithm has convergence process, so that the satellite can cause frequent convergence during moving, heavy network load is caused, and the congestion condition and fault in actual operation can not be predicted.
In the prior art, when a satellite network fails, the following two methods can be generally used for processing:
(1) reporting the fault to a ground route calculation controller, removing the fault link from the topology, recalculating and injecting the recalculated link to the satellite; and sending a path switching instruction so as to switch the path of message forwarding.
(2) And reporting the fault to a ground controller, selecting a satellite set influenced by a link, and then sending a command of switching the standby path which is calculated in advance to switch to the standby path.
However, because the time delay of the satellite to the ground station is large, the method (1) can affect the timeliness of satellite network communication; although the method (2) can solve the problem by switching the standby path when a failure occurs for the first time, if a failed link occurs in the standby path, the standby path also fails, and at this time, recalculation, emptying and injection processes are required, so that timeliness and multi-failure of satellite network communication are difficult to be considered at the same time.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a satellite network link failure processing method, apparatus, computer device, computer readable storage medium and computer program product for solving the above technical problems.
In a first aspect, the present application provides a method for processing a link failure of a satellite network. The method comprises the following steps:
acquiring a real-time inter-satellite routing snapshot; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network;
determining a plurality of non-overlapping paths between a message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite;
determining a current optimal path corresponding to a message sending satellite from multiple non-overlapping paths based on inter-satellite link mapping; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping.
In one embodiment, obtaining a real-time inter-satellite routing snapshot includes:
monitoring the communication condition of inter-satellite direct-connection links among satellites in a satellite network to obtain invalid direct-connection links among the satellites;
and acquiring an inter-satellite route snapshot generated by the ground controller, and deleting the inter-satellite direct route corresponding to the invalid direct link from the inter-satellite route snapshot to obtain a real-time inter-satellite route snapshot.
In one embodiment, determining a plurality of non-overlapping paths between a message sending satellite and a directly connected satellite thereof based on a real-time inter-satellite routing snapshot, and correspondingly generating a real-time inter-satellite link map corresponding to the message sending satellite, includes:
acquiring all paths from each satellite to all direct-connected satellites in a satellite network based on real-time inter-satellite routing snapshots, and determining all paths from a message sending satellite to all direct-connected satellites;
determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite.
In one embodiment, after determining a current optimal path corresponding to a packet sending satellite from multiple non-overlapping paths based on inter-satellite link mapping, the method further includes:
monitoring communication conditions of a plurality of direct connection links contained in the optimal path;
and when the communication condition of any one of the plurality of direct connection links is abnormal, determining that the optimal path communication is abnormal.
In one embodiment, the method further includes:
acquiring a message to be sent, and acquiring a satellite simplified label verified by a target satellite as a path label; each path label corresponds to a corresponding target satellite one by one;
and adding the path label to a message header of the message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path label.
In one embodiment, after obtaining the message to be sent, the method further includes:
if the satellite simplified label verified by the target satellite does not exist, acquiring the path information of the optimal path, wherein the path information comprises: the method comprises the steps that a message sending satellite, a target satellite and a plurality of direct connection links contained in an optimal path are obtained;
and adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of the message to be sent, so that the message to be sent is forwarded to a target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the plurality of relay satellites through which the optimal path passes on the satellite simplified label is obtained.
In a second aspect, the application further provides a device for processing a satellite network link failure. The device comprises:
the route determining module is used for acquiring real-time inter-satellite route snapshots; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network;
the link mapping generation module is used for determining a plurality of non-overlapping paths between the message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite;
the optimal path determining module is used for determining a current optimal path corresponding to a message sending satellite from a plurality of non-overlapping paths based on inter-satellite link mapping; and when the communication of the current optimal path is abnormal, the current optimal path is re-determined according to the inter-satellite link mapping.
In a third aspect, the present application also provides a computer device. The computer device comprises a memory storing a computer program and a processor implementing the steps of the method according to any of the embodiments described above when executing the computer program.
In a fourth aspect, the present application further provides a computer device readable storage medium. The computer device readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any of the above embodiments.
In a fifth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which, when executed by a processor, performs the steps of the method of any of the above embodiments.
According to the method, the device, the computer equipment, the storage medium and the computer program product for processing the link fault of the satellite network, all effective inter-satellite direct routes in the satellite network are determined by acquiring the real-time inter-satellite route snapshot; based on the real-time inter-satellite route snapshot, a plurality of non-overlapping paths between the message sending satellite and the directly connected satellite are determined, the fault satellite can be bypassed in real time, and the success rate of communication is improved. Further, determining a current optimal path corresponding to the message sending satellite from the plurality of non-overlapping paths; when the communication of the current optimal path is abnormal, the current optimal path is re-determined according to the inter-satellite link mapping, a plurality of faults can be supported to occur simultaneously or successively, and because the switched optimal path and the previous fault path are non-overlapping paths, the satellite which has faults before can be effectively avoided.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for handling a satellite network link failure according to an embodiment;
FIG. 2 is a diagram of an inter-satellite route, in accordance with one embodiment;
FIG. 3 is a diagram illustrating an inter-satellite routing snapshot in accordance with one embodiment;
FIG. 4 is a diagram of a link map in another embodiment;
FIG. 5 is a diagram illustrating the contents of a link mapping table in another embodiment;
FIG. 6 is a schematic diagram of non-overlapping paths between two satellites in another embodiment;
FIG. 7 is a schematic link map of non-overlapping paths between two satellites in another embodiment;
FIG. 8 is a diagram illustrating communication status of paths in another embodiment;
FIG. 9 is a schematic diagram of a header with a simplified tag added in another embodiment;
FIG. 10 is a block diagram showing a configuration of a satellite network link failure processing apparatus according to an embodiment;
FIG. 11 is a diagram illustrating an internal structure of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Because an LEO (Low-orbit) satellite has a fast moving characteristic (the relative ground speed exceeds 25000km/h), the connection time between the LEO satellite and a ground controller is short, and the ground classical distributed algorithm has a convergence process, so that the satellite frequently converges in the moving process, and the congestion condition and the fault in actual operation cannot be predicted, so that a heavy network load is easily caused to a satellite communication network.
The satellite network link fault processing method can be applied to single-side implementation of a satellite controller, can also be applied to a system comprising the satellite controller and a ground controller, and is achieved through interaction of the satellite controller and the ground controller.
The method is applied to a system comprising a satellite controller and a ground controller as an example, and the embodiment is realized through network interaction of the ground controller and the satellite controller. Wherein the data storage system can store data that the satellite controller needs to process. The data storage system may be integrated on a satellite network server. The ground controller and the satellite controller interactively determine real-time inter-satellite route snapshots through a network; the satellite controller determines an optimal path for message transmission among a plurality of satellites based on the real-time inter-satellite routing snapshot.
Wherein the plurality of satellites may be low earth orbit satellites. The ground controller may adopt a Software Defined Network (SDN) centralized management and control architecture.
In one embodiment, as shown in fig. 1, a method for processing a satellite network link failure is provided, which is described by taking an example that the method is applied to a system including a satellite controller and a ground controller, and includes the following steps:
In this embodiment, the satellite controller obtains a real-time inter-satellite routing snapshot from the ground controller. For example, as shown in fig. 3, taking S29- > S32 as an example, the route snapshot includes a destination satellite and a next hop (relay satellite).
In the present embodiment, the communication conditions include, but are not limited to: normal communication, communication congestion, communication failure.
In this embodiment, according to the real-time inter-satellite route snapshot, the satellite controller may monitor the communication status of the inter-satellite direct links between the satellites in the satellite network in real time, use the direct links with normal communication among the multiple direct links as effective inter-satellite links, and determine effective inter-satellite routes based on the multiple effective inter-satellite links. It can be understood that, among the above-mentioned plurality of direct links, a direct link with a communication congestion or a communication failure is a failed inter-satellite link. Further, as shown in fig. 2, the ground controller may obtain, in real time, the communication conditions of the plurality of direct-connected links through the satellite controller, determine a plurality of real-time effective inter-satellite links, and update the inter-satellite route snapshot correspondingly in real time.
And 204, determining a plurality of non-overlapping paths between the message sending satellite and the direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite.
In this embodiment, the non-overlapping paths include, but are not limited to, paths corresponding to direct-connected links, and when the packet sending satellite and the direct-connected satellite thereof can perform network communication through a plurality of relay satellites, the non-overlapping paths may also refer to paths without a shared relay satellite.
In this embodiment, as shown in fig. 4, the real-time inter-satellite link mapping corresponding to the packet sending satellite may be represented by a link mapping snapshot real-time link mapping table or the like.
In another embodiment, as shown in fig. 5, the link mapping table may include information such as path status, path delay, path hop count, etc.
In this embodiment, the satellite controller may determine the optimal path from the plurality of non-overlapping paths according to factors such as hop count, time delay, link load, and the like. It will be appreciated that the satellite controller may make the selection of the optimal path according to the traffic demands. Specifically, the satellite controller may select a path with the smallest hop count from the plurality of non-overlapping paths as the optimal path, or may select a path with the smallest time delay as the optimal path.
In the method for processing the link fault of the satellite network, all effective inter-satellite direct routes in the satellite network are determined by acquiring real-time inter-satellite route snapshots; based on the real-time inter-satellite route snapshot, a plurality of non-overlapping paths between the message sending satellite and the directly connected satellite are determined, the fault satellite can be bypassed in real time, and the success rate of communication is improved. Further, determining a current optimal path corresponding to the message sending satellite from the plurality of non-overlapping paths; when the communication of the current optimal path is abnormal, the current optimal path is re-determined according to the inter-satellite link mapping, a plurality of faults can be supported to occur simultaneously or successively, and because the switched optimal path and the previous fault path are non-overlapping paths, the satellite which has faults before can be effectively avoided.
In one embodiment, obtaining a real-time inter-satellite routing snapshot may include: monitoring the communication condition of inter-satellite direct-connection links among satellites in a satellite network to obtain invalid direct-connection links among the satellites; and acquiring an inter-satellite route snapshot generated by the ground controller, and deleting the inter-satellite direct route corresponding to the invalid direct link from the inter-satellite route snapshot to obtain a real-time inter-satellite route snapshot.
In the present embodiment, the communication conditions include, but are not limited to: normal communication, communication congestion, communication failure.
In this embodiment, the satellite controller may send the monitoring signal to the satellite controllers of the plurality of directly connected satellites corresponding thereto in real time, and request signal feedback from the satellite controllers of the plurality of directly connected satellites. The satellite controller judges the communication state of the satellite key direct-connection link based on the information such as the existence and the content of signal feedback in the preset time.
In this embodiment, the satellite controller may send the first monitoring message to all direct-connected satellites corresponding to the message sending satellite in a periodic ECHO _ INTERVAL, and request signal feedback. Further, after the directly connected satellite receives the first monitoring message sent by the message sending satellite, the first signal feedback message can be sent to the corresponding message sending satellite. The first monitoring message and the first monitoring feedback message corresponding to the first monitoring message can carry the same timestamp, so that the message sending satellite can determine the time delay of communication between the message sending satellite and the directly connected satellite.
In this embodiment, the first monitoring packet may also carry a serial number of a packet sending satellite, so that the satellite receiving the first monitoring packet can identify the sending end conveniently.
In another embodiment, the first monitoring feedback message may also carry a serial number of a satellite, and after the message sending satellite receives the first monitoring feedback message, the sending satellite of the first monitoring feedback message may be determined according to the serial number in the first monitoring feedback message, so as to determine that the bidirectional routing communication between the sending satellite and the satellite is normal.
In this embodiment, within a preset time, if the satellite control of the message sending satellite does not receive the first monitoring feedback information, it is considered that link communication between the message sending satellite and the directly connected satellite is abnormal, such as a communication failure or a communication congestion. For example, the satellite a and the satellite B are directly connected satellites, the satellite a periodically sends a first monitoring message to the satellite B, and if the satellite a receives the first monitoring feedback message sent by the satellite B within a preset time, the satellite a proves that the bidirectional routing communication between the satellite a and the satellite B is normal; when the satellite a does not receive the first monitoring feedback message corresponding to the satellite B within the preset time, a communication fault or communication congestion may occur in a direct connection link between the satellite a and the satellite B.
In another embodiment, each satellite in the satellite network may send a satellite as a message, and therefore, each satellite periodically sends a monitoring message to a plurality of directly connected satellites corresponding to the satellite. That is to say, when the message sending satellite periodically sends the first monitoring message to the direct connection satellite corresponding to the message sending satellite, the direct connection satellite also periodically sends the second monitoring message to the message sending satellite.
In this embodiment, based on the periodic mutual monitoring between the messaging satellite and the directly connected satellite, the communication status of the directly connected link between the messaging satellite and the directly connected satellite can be determined.
In the present embodiment, the communication failure may be classified as a one-way communication abnormality or a two-way communication abnormality. For example, when the satellite B is a direct connection satellite of the message sending satellite a, and the message sending satellite a does not receive the first monitoring feedback message corresponding to the satellite B within a preset time, if the message sending satellite a receives the second monitoring message sent by the satellite B, it indicates that a direct connection link between the message sending satellite a and the satellite B is abnormal in one-way communication, that is, only one-way communication is available; if the message sending satellite A does not receive the second monitoring message sent by the satellite B or the first monitoring feedback message sent by the satellite B, the fact that a direct connection link between the message sending satellite A and the satellite B is abnormal in two-way communication is indicated, namely, normal communication cannot be achieved in two ways.
In one embodiment, determining a plurality of non-overlapping paths between a message sending satellite and a directly connected satellite thereof based on a real-time inter-satellite routing snapshot, and correspondingly generating a real-time inter-satellite link map corresponding to the message sending satellite may include: acquiring all paths from each satellite to all direct-connected satellites in a satellite network based on real-time inter-satellite routing snapshots, and determining all paths from a message sending satellite to all direct-connected satellites; determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite.
In this embodiment, as shown in fig. 6, the non-overlapping paths include, but are not limited to, paths corresponding to direct-connected links, and when the packet sending satellite and the direct-connected satellite thereof can perform network communication through multiple relay satellites, the non-overlapping paths may also refer to paths without a shared relay satellite. For example, as shown in FIG. 7, there is a link map corresponding to the four non-overlapping paths S30 → S31 in FIG. 6. Therefore, when one path has a fault and the satellite controller selects the other path for communication, the relay satellite passing through the fault path can be avoided.
In one embodiment, as shown in fig. 8, after determining a current optimal path corresponding to a packet sending satellite from multiple non-overlapping paths based on inter-satellite link mapping, the method may further include: monitoring communication conditions of a plurality of direct connection links contained in the optimal path; and when the communication condition of any one of the plurality of direct connection links is abnormal, determining that the optimal path communication is abnormal.
In this embodiment, due to unpredictability of a fault and congestion in the satellite communication network, the satellite controller monitors the communication condition of the optimal path in real time, and switches a new optimal path in real time after the communication condition of the current optimal path has a communication fault or communication congestion, so that the problem of abnormal data forwarding caused by the communication fault or the communication congestion can be solved, and multiple faults can be supported to occur simultaneously or sequentially.
In one embodiment, as shown in fig. 9, the method may further include: acquiring a message to be sent, and acquiring a satellite simplified label verified by a target satellite as a path label; each path label corresponds to a corresponding target satellite one by one; and adding the path label to a message header of the message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path label.
In this embodiment, after the target satellite verifies the reduced tag, the target satellite is considered to have understood the path represented by the reduced tag. Further, when all the satellites in the optimal path verify the simplified tags, all the satellites in the optimal path are considered to have understood the paths represented by the simplified tags. Furthermore, only a simplified label needs to be added into the message header to represent the optimal path, and the storage space is effectively saved. Taking IP (Internet Protocol) address forwarding as an example, if the IP header is 20 bytes, in the case of not using the simplified label, the set of paths that S30 needs to join from path 2 is 40 bytes in total from { S30- > S26, S30- > S27, S30- > S31}, whereas the set of paths represented by the simplified label { label, S30- > S31} only needs 1 byte, and the more the hops are, the more the effect of saving the storage space is obvious.
In one embodiment, after obtaining the message to be sent, the method may further include: if the satellite simplified label verified by the target satellite does not exist, acquiring the path information of the optimal path, wherein the path information comprises: the method comprises the steps that a message sending satellite, a target satellite and a plurality of direct connection links contained in an optimal path are obtained; and adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of the message to be sent, so that the message to be sent is forwarded to a target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the plurality of relay satellites through which the optimal path passes on the satellite simplified label is obtained.
In this embodiment, when the packet is forwarded through a path for the first time, since the verification of the target satellite on the simplified tag is not obtained yet, in order to reduce the communication delay, path information is added to the packet header and the simplified tag to be verified is carried, so that the packet can be normally forwarded when the simplified tag is not verified by the target satellite yet.
In this embodiment, after receiving the simplified tag sent by the message sending satellite, the target satellite determines whether the use record of the tag already exists locally, and if so, the verification fails, and if not, the verification succeeds. After receiving the verification failure message, the message sending satellite redistributes a label to repeat the steps until the verification is successful.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides a satellite network link fault processing device for realizing the satellite network link fault processing method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so specific limitations in one or more embodiments of the satellite network link failure processing device provided below can refer to the limitations on the satellite network link failure processing method in the foregoing, and details are not described here.
In one embodiment, as shown in fig. 10, there is provided a satellite network link failure processing apparatus, including: a route determination module 100, a link map determination module 200, and an optimal path determination module 300, wherein:
a route determining module 100, configured to obtain a real-time inter-satellite route snapshot; the inter-satellite route snapshot includes all valid inter-satellite direct routes in the satellite network.
The link mapping generation module 200 is configured to determine multiple non-overlapping paths between the packet sending satellite and the direct connection satellite thereof based on the real-time inter-satellite routing snapshot, and generate a real-time inter-satellite link mapping corresponding to the packet sending satellite.
An optimal path determining module 300, configured to determine, based on inter-satellite link mapping, a current optimal path corresponding to a packet sending satellite from multiple non-overlapping paths; and when the communication of the current optimal path is abnormal, the current optimal path is re-determined according to the inter-satellite link mapping.
In one embodiment, the route determining module 100 may include:
and the invalid link determining submodule is used for monitoring the communication condition of the inter-satellite direct link between the satellites in the satellite network and acquiring the invalid direct link between the satellites.
And the real-time routing determination submodule is used for acquiring the inter-satellite routing snapshot generated by the ground controller, deleting the inter-satellite direct routing corresponding to the failed direct connection link from the inter-satellite routing snapshot, and acquiring the real-time inter-satellite routing snapshot.
In one embodiment, the link map generating module 200 may include:
and the full-path determining submodule is used for acquiring all paths from each satellite to one of the directly connected satellites in the satellite network based on the real-time inter-satellite routing snapshot and determining all paths from the message sending satellite to all the directly connected satellites.
And the link mapping generation submodule is used for determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite.
In one embodiment, the optimal path determining module 300 may include:
and the optimal path communication monitoring submodule is used for monitoring the communication conditions of a plurality of direct-connected links contained in the optimal path.
And the communication abnormity determining submodule is used for determining the communication abnormity of the optimal path when the communication condition of any one of the plurality of direct-connected links is communication abnormity.
In one embodiment, the apparatus may further include:
the path tag acquisition module is used for acquiring a message to be sent and acquiring a satellite simplified tag verified by a target satellite as a path tag; and each path label corresponds to the corresponding target satellite one by one.
And the message header processing module is used for adding the path label to the message header of the message to be sent so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path label.
In one embodiment, the apparatus may further include:
the path information acquisition module is used for acquiring the path information of the optimal path if the satellite simplified tag verified by the target satellite does not exist, and the path information comprises: and the message sending satellite, the target satellite and a plurality of direct connection links contained in the optimal path.
And the path forwarding module is used for adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of the message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the plurality of relay satellites through which the optimal path passes on the satellite simplified label is obtained.
The modules in the satellite network link failure processing device can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing data such as intersatellite link mapping, simplified labels and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of satellite network link failure handling.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program: acquiring a real-time inter-satellite routing snapshot; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network; determining a plurality of non-overlapping paths between a message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite; determining a current optimal path corresponding to a message sending satellite from multiple non-overlapping paths based on inter-satellite link mapping; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping.
In one embodiment, the obtaining of the real-time inter-satellite routing snapshot when the processor executes the computer program may include: monitoring the communication condition of inter-satellite direct-connection links among satellites in a satellite network to obtain invalid direct-connection links among the satellites; and acquiring an inter-satellite route snapshot generated by the ground controller, and deleting the inter-satellite direct route corresponding to the invalid direct link from the inter-satellite route snapshot to obtain a real-time inter-satellite route snapshot.
In one embodiment, when executing the computer program, the processor implements a real-time inter-satellite routing snapshot, determines a plurality of non-overlapping paths between the packet sending satellite and a directly connected satellite thereof, and generates a real-time inter-satellite link map corresponding to the packet sending satellite, which may include: acquiring all paths from each satellite to all directly connected satellites in a satellite network based on real-time inter-satellite routing snapshots, and determining all paths from a message sending satellite to all directly connected satellites; determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite. .
In one embodiment, after the processor executes the computer program to determine a current optimal path corresponding to the packet sending satellite from multiple non-overlapping paths based on inter-satellite link mapping, the method may further include: monitoring communication conditions of a plurality of direct connection links contained in the optimal path; and when the communication condition of any one of the plurality of direct links is abnormal, determining that the optimal path communication is abnormal.
In one embodiment, the processor executing the computer program further performs the steps of: acquiring a message to be sent, and acquiring a satellite simplified label verified by a target satellite as a path label; each path label corresponds to a corresponding target satellite one by one; and adding the path label to a message header of the message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path label.
In one embodiment, after the processor executes the computer program to obtain the message to be sent, the method may further include: if the satellite simplified label verified by the target satellite does not exist, acquiring the path information of the optimal path, wherein the path information comprises: the method comprises the steps that a message sending satellite, a target satellite and a plurality of direct connection links contained in an optimal path are obtained; and adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of the message to be sent, so that the message to be sent is forwarded to a target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the plurality of relay satellites through which the optimal path passes on the satellite simplified label is obtained.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring a real-time inter-satellite routing snapshot; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network; determining a plurality of non-overlapping paths between a message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite; determining a current optimal path corresponding to a message sending satellite from multiple non-overlapping paths based on inter-satellite link mapping; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping.
In one embodiment, the computer program, when executed by the processor, implements obtaining a real-time inter-satellite routing snapshot, and may include: monitoring the communication condition of inter-satellite direct-connection links among satellites in a satellite network to obtain invalid direct-connection links among the satellites; and acquiring an inter-satellite route snapshot generated by the ground controller, and deleting the inter-satellite direct route corresponding to the invalid direct link from the inter-satellite route snapshot to obtain a real-time inter-satellite route snapshot.
In one embodiment, when executed by the processor, the computer program implements a real-time inter-satellite routing snapshot, determines multiple non-overlapping paths between the messaging satellite and a directly connected satellite thereof, and generates a real-time inter-satellite link map corresponding to the messaging satellite, which may include: acquiring all paths from each satellite to all direct-connected satellites in a satellite network based on real-time inter-satellite routing snapshots, and determining all paths from a message sending satellite to all direct-connected satellites; determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite.
In one embodiment, after the computer program is executed by the processor to determine a current optimal path corresponding to the messaging satellite from a plurality of non-overlapping paths based on inter-satellite link mapping, the method may further include: monitoring communication conditions of a plurality of direct connection links contained in the optimal path; and when the communication condition of any one of the plurality of direct connection links is abnormal, determining that the optimal path communication is abnormal.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a message to be sent, and acquiring a satellite simplified label verified by a target satellite as a path label; each path label corresponds to a corresponding target satellite one by one; and adding the path label to a message header of the message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path label.
In one embodiment, after the computer program is executed by the processor to obtain the message to be sent, the method may further include: if the satellite simplified label verified by the target satellite does not exist, acquiring the path information of the optimal path, wherein the path information comprises: the method comprises the steps that a message sending satellite, a target satellite and a plurality of direct connection links contained in an optimal path are obtained; and adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of the message to be sent, so that the message to be sent is forwarded to a target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the plurality of relay satellites through which the optimal path passes on the satellite simplified label is obtained.
In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, performs the steps of: acquiring a real-time inter-satellite routing snapshot; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network; determining a plurality of non-overlapping paths between a message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite; determining a current optimal path corresponding to a message sending satellite from multiple non-overlapping paths based on inter-satellite link mapping; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping.
In one embodiment, the computer program, when executed by the processor, implements obtaining a real-time inter-satellite routing snapshot, and may include: monitoring the communication condition of inter-satellite direct-connection links among satellites in a satellite network to obtain invalid direct-connection links among the satellites; and acquiring an inter-satellite route snapshot generated by the ground controller, and deleting the inter-satellite direct route corresponding to the invalid direct link from the inter-satellite route snapshot to obtain a real-time inter-satellite route snapshot.
In one embodiment, when executed by a processor, a computer program implements a real-time inter-satellite routing snapshot based on a plurality of non-overlapping paths between a messaging satellite and a directly connected satellite thereof, and correspondingly generates a real-time inter-satellite link map corresponding to the messaging satellite, which may include: acquiring all paths from each satellite to all direct-connected satellites in a satellite network based on real-time inter-satellite routing snapshots, and determining all paths from a message sending satellite to all direct-connected satellites; determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite. .
In one embodiment, after the computer program is executed by the processor to determine a current optimal path corresponding to the messaging satellite from a plurality of non-overlapping paths based on inter-satellite link mapping, the method may further include: monitoring communication conditions of a plurality of direct connection links contained in the optimal path; and when the communication condition of any one of the plurality of direct connection links is abnormal, determining that the optimal path communication is abnormal.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a message to be sent, and acquiring a satellite simplified label verified by a target satellite as a path label; each path label corresponds to the corresponding target satellite one by one; and adding the path label to a message header of the message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path label.
In one embodiment, after the computer program is executed by the processor to obtain the message to be sent, the method may further include: if the satellite simplified label verified by the target satellite does not exist, acquiring the path information of the optimal path, wherein the path information comprises: the method comprises the steps that a message sending satellite, a target satellite and a plurality of direct connection links contained in an optimal path are obtained; and adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of the message to be sent, so that the message to be sent is forwarded to a target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the plurality of relay satellites through which the optimal path passes on the satellite simplified label is obtained.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), Magnetic Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases involved in the embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A method for handling a link failure in a satellite network, the method comprising:
acquiring a real-time inter-satellite routing snapshot; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network;
determining a plurality of non-overlapping paths between a message sending satellite and a direct connection satellite thereof based on the real-time inter-satellite route snapshot, and correspondingly generating real-time inter-satellite link mapping corresponding to the message sending satellite;
determining a current optimal path corresponding to the message sending satellite from a plurality of non-overlapping paths based on the inter-satellite link mapping; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping.
2. The method of claim 1, wherein the obtaining a real-time inter-satellite routing snapshot comprises:
monitoring the communication condition of inter-satellite direct-connection links among satellites in a satellite network to obtain invalid direct-connection links among the satellites;
and acquiring an inter-satellite route snapshot generated by the ground controller, and deleting the inter-satellite direct route corresponding to the invalid direct link from the inter-satellite route snapshot to obtain a real-time inter-satellite route snapshot.
3. The method according to claim 1, wherein the determining a plurality of non-overlapping paths between the messaging satellite and a directly connected satellite thereof based on the real-time inter-satellite routing snapshot and correspondingly generating a real-time inter-satellite link map corresponding to the messaging satellite comprises:
acquiring all paths from each satellite to all direct-connected satellites in a satellite network based on the real-time inter-satellite routing snapshot, and determining all paths from a message sending satellite to all direct-connected satellites;
and determining all non-overlapping paths from the message sending satellite to each direct connection satellite based on all paths from the message sending satellite to all direct connection satellites, and correspondingly generating inter-satellite link mapping corresponding to the message sending satellite.
4. The method according to claim 1, wherein after determining a current optimal path corresponding to the messaging satellite from the plurality of non-overlapping paths based on the inter-satellite link mapping, further comprising:
monitoring communication conditions of a plurality of direct connection links contained in the optimal path;
and when the communication condition of any one of the plurality of direct connection links is abnormal communication, determining that the optimal path communication is abnormal.
5. The method of claim 4, further comprising:
acquiring a message to be sent, and acquiring a satellite simplified label verified by a target satellite as a path label; each path label corresponds to a corresponding target satellite one by one;
and adding the path label to a message header of a message to be sent, so that the message to be sent is forwarded to a target satellite according to a path corresponding to the path label.
6. The method according to claim 5, wherein after the obtaining the message to be sent, further comprising:
if the satellite simplified label verified by the target satellite does not exist, acquiring the path information of the optimal path, wherein the path information comprises: the message sending satellite, the target satellite and a plurality of direct connection links contained in the optimal path;
and adding the path information of the optimal path and the satellite simplified label to be verified corresponding to the path information into a message header of a message to be sent, so that the message to be sent is forwarded to the target satellite according to the path corresponding to the path information, and verification feedback of the target satellite and the relay satellites through which the optimal path passes on the satellite simplified label is obtained.
7. An apparatus for handling a satellite network link failure, the apparatus comprising:
the route determining module is used for acquiring real-time inter-satellite route snapshots; the inter-satellite route snapshot comprises all effective inter-satellite direct routes in the satellite network;
a link mapping generation module, configured to determine multiple non-overlapping paths between a packet sending satellite and a direct connection satellite thereof based on the real-time inter-satellite routing snapshot, and generate a real-time inter-satellite link mapping corresponding to the packet sending satellite;
an optimal path determining module, configured to determine, based on the inter-satellite link mapping, a current optimal path corresponding to the packet sending satellite from multiple non-overlapping paths; and when the communication of the current optimal path is abnormal, re-determining the current optimal path according to the inter-satellite link mapping.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 6 when executed by a processor.
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