A multi-orbit satellite network networking method based on an SD-WAN architecture

Abstract

The application discloses a kind of multi-orbit satellite network networking methods based on SD-WAN architecture, it is related to space-ground integration network communication technical field.The method includes: satellite communication CPE is connected with multi-orbit satellite SD-WAN controller and periodically reports station type capacity and service routing information;Controller according to networking task planning, network measurement task is issued to satellite communication CPE, and when bandwidth guarantee is needed, resource is pre-applied to each orbit resource management and control center;Satellite communication CPE executes network measurement and reports result;Controller comprehensively resource pre-application result, network measurement result, station type capacity and service routing information, executes network optimization algorithm, generates orbit satellite network selection strategy and is issued to satellite communication CPE, and confirms resource reservation to resource management and control center.The application can select optimal orbit according to service characteristics and network state intelligently, improve user experience and the certainty of service transmission.

Description

Technical Field

[0001] This invention relates to the field of space-ground integrated network communication technology, and in particular to a multi-orbit satellite network networking method based on SD-WAN architecture. Background Technology

[0002] Multi-orbit satellite networks are becoming a hot topic in satellite network development. For decades, high-orbit satellites have been the primary means of satellite communication for users. In recent years, low-orbit satellite internet has developed rapidly, gradually becoming the mainstay of satellite communication, while medium-orbit satellite constellations are also becoming increasingly important. Future satellite networks will be hybrid networks with multiple orbits (high, medium, and low orbits), military, civilian, and commercial systems coexisting. However, from a user's perspective, they are less concerned with the specific orbit or system of the satellite network used and more concerned with the user experience. How to efficiently and comprehensively utilize multi-orbit hybrid satellite networks to provide users with a better experience and achieve differentiated service quality assurance for user services is currently a hot research topic. Summary of the Invention

[0003] This invention discloses a multi-orbit satellite network networking method based on SD-WAN architecture, which aims to solve the problem of flexible use of multiple links and differentiated services when users use a hybrid networking of high, medium and low orbit satellite networks.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-orbit satellite network deployment method based on SD-WAN architecture specifically includes the following steps:

[0006] Step 1: After the initial connection is established between the Satcom CPE and the Multi-orbit Satellite SD-WAN Controller, the Satcom CPE periodically sends normal connection maintenance messages to the Multi-orbit Satellite SD-WAN Controller; the Satcom CPE sends site capability update reporting messages and service routing update reporting messages to the Multi-orbit Satellite SD-WAN Controller; the Multi-orbit Satellite SD-WAN Controller updates and pushes the received reporting messages to other Satcom CPEs.

[0007] Step 2: After receiving the task plan for networking communication using the multi-orbit satellite network, the multi-orbit satellite SD-WAN controller sends a network measurement task execution message to the satellite communication CPEs with communication needs in the networking task. If the communication needs in the networking task require the orbital satellite network to guarantee bandwidth, the multi-orbit satellite SD-WAN controller extracts the station address information of each channel connected to the satellite communication CPEs of both parties in the business communication, sends a resource pre-request to each resource management center of the multi-orbit satellite network, and each resource management center returns the resource pre-request result. The multi-orbit satellite SD-WAN controller prioritizes the use of orbital satellite networks that can guarantee resources.

[0008] Step 3: The satellite CPE that receives the network measurement task performs network measurement on the orbital satellite network and obtains the measurement results. Then, it sends a network measurement result reporting message to the multi-orbit satellite SD-WAN controller.

[0009] Step 4: The multi-orbit satellite SD-WAN controller executes a network optimization algorithm based on the obtained resource capability guarantee information, generates an orbital satellite network selection strategy, distributes it to each satellite communication CPE, and sends a resource application confirmation message to each resource management center based on the final orbital satellite network result. After confirming the use of the orbital satellite network resource, each resource management center reserves resources for the channel unit used by both communicating parties.

[0010] Furthermore, step 1 specifically includes the following process:

[0011] Step 101: After the Satcom CPE is started, it sends an initial connection establishment message to the multi-orbit satellite SD-WAN controller;

[0012] Step 102: The multi-orbit satellite SD-WAN controller sends an initial configuration message to the connected satellite CPE and establishes an initial connection;

[0013] Step 103: After receiving the initial configuration message, the Satcom CPE sends a site capability update reporting message and a service routing update reporting message to the multi-orbit satellite SD-WAN controller; the multi-orbit satellite SD-WAN controller then pushes the received reporting messages to other Satcom CPEs.

[0014] Furthermore, the resource capability assurance information in step 4 includes resource pre-application results, service assurance requirements, network measurement results reported by the satellite communication CPE, and the site type capabilities and service routes of each satellite communication CPE.

[0015] Furthermore, the networking mode between satellite communication CPEs is either a two-layer network or a three-layer network. If it is a two-layer network, a two-layer mesh tunnel is established between the interfaces of all satellite communication CPEs and each orbital satellite network channel unit. If it is a three-layer network, a three-layer mesh tunnel is established between the interfaces of all satellite communication CPEs and each orbital satellite network channel unit.

[0016] Furthermore, in step 4, the orbital satellite network selection strategy refers to the tunnel diversion information based on service characteristics. When the satellite communication CPE receives the service message from the user side, it forwards it into the corresponding second-level or third-level tunnel of the orbital satellite network for encapsulation according to the tunnel diversion information, and then sends it to the satellite side.

[0017] Furthermore, in step 4, when the resource capability guarantee information changes, the network optimization algorithm will be re-executed to regenerate the service-based orbital satellite network selection strategy, which will be sent to each satellite communication CPE. Based on the updated orbital satellite network selection results, the resource pre-request message will be resent to each resource management center. After confirming the use of the updated satellite network resources, the resource management center will re-reserve resources for the channel units used by both communicating parties.

[0018] Furthermore, in step 102, when the multi-orbit satellite SD-WAN controller sends the initial configuration message to the satellite communication CPE that has established the connection, if the home station information is configured for the satellite communication CPE, then when the multi-orbit satellite SD-WAN controller receives the service route update report message from the satellite communication CPE, it sends service route inbound / outbound control messages to all home outbound ground stations. The service route inbound / outbound control messages sent to the home outbound ground stations of the satellite communication CPE carry outbound service route information; the service route inbound / outbound control messages sent to the non-home outbound ground stations of the satellite communication CPE carry inbound service route information.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] This invention, by deploying a multi-orbit satellite SD-WAN controller and a satellite communication CPE, and combining satellite network channel status and resource status, can achieve efficient guarantee and deterministic transmission of user services. It is particularly suitable for multi-orbit satellite network systems with shared air interface link resources and heterogeneous network differences. Attached Figure Description

[0021] Figure 1 This is an example diagram illustrating an application scenario of the present invention. Detailed Implementation

[0022] The following combination Figure 1 The preferred embodiments of the present invention are described herein. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Figure 1 The application scenario example diagram illustrates the basic principle of this embodiment. Both satellite communication vehicle a and satellite communication vehicle b are equipped with satellite communication CPEs. Both satellite communication vehicle a and satellite communication vehicle b are connected to a multi-orbit satellite network consisting of multiple high (GEO), medium (MEO), and low (LEO) orbits. When satellite communication vehicle a and satellite communication vehicle b need to communicate, they can choose to use one or more of the high-orbit, medium-orbit, and low-orbit satellite networks.

[0024] The satellite communication CPEs of satellite communication vehicles a and b will establish a connection with the multi-orbit satellite SD-WAN controller to negotiate transmission capabilities, report their own site type capabilities, service routing and other information, and obtain the other party's site type capabilities, service routing and other information from the multi-orbit satellite SD-WAN controller.

[0025] When satellite communication vehicle A and satellite communication vehicle B need to perform network communication tasks, the user plans the network task through the multi-orbit satellite SD-WAN controller. Based on the task requirements, the multi-orbit satellite SD-WAN controller initiates network measurement tasks to assess the link quality of the satellite networks on multiple orbits between satellite communication vehicles A and B. This obtains network transmission quality data for each orbital satellite network between satellite communication vehicles A and B, including latency, jitter, and packet loss. For bandwidth guarantee services between satellite communication vehicles A and B, the multi-orbit satellite SD-WAN controller extracts the channel unit information of the satellite communication CPE connection between satellite communication vehicles A and B, and sends resource pre-requests to the resource management centers of each orbital satellite network. The resource management centers of each orbital satellite network then return the resource pre-request results.

[0026] The multi-orbit satellite SD-WAN controller executes a network optimization algorithm based on resource pre-request results, network measurement results reported by the satellite communication CPEs, the site type capabilities of each satellite communication CPE device, and service routing information. This algorithm generates a service-based orbital satellite network selection strategy, which is then distributed to the satellite communication CPEs of satellite communication vehicles a and b. Based on the final orbital satellite network results, the controller sends a resource request confirmation message to the resource management center. After confirming the use of satellite network resources, the resource management center of each orbital satellite network reserves channel units for both communicating parties. Once the multi-orbit satellite SD-WAN controller completes the network planning, satellite communication vehicles a and b can conduct service communication based on the multi-orbit satellite network.

[0027] The following provides a more detailed explanation of a multi-orbit satellite network deployment method based on the SD-WAN architecture, including the following steps:

[0028] Step 1: The Satcom CPE establishes an initial connection with the multi-orbit satellite SD-WAN controller; the Satcom CPE periodically sends normal connection maintenance messages to the multi-orbit satellite SD-WAN controller; the Satcom CPE sends site capability update reporting messages and service routing update reporting messages to the multi-orbit satellite SD-WAN controller; the multi-orbit satellite SD-WAN controller updates and pushes the received reporting messages to other Satcom CPEs.

[0029] Step 2: After receiving the task plan for networking communication using the multi-orbit satellite network, the multi-orbit satellite SD-WAN controller sends a network measurement task execution message to the satellite communication CPEs with communication needs in the networking task. If the communication needs in the networking task require the orbital satellite network to guarantee bandwidth, the multi-orbit satellite SD-WAN controller extracts the station address information of each channel connected to the satellite communication CPEs of both parties in the business communication, sends a resource pre-request to each resource management center of the multi-orbit satellite network, and each resource management center returns the resource pre-request result. The multi-orbit satellite SD-WAN controller prioritizes the use of orbital satellite networks that can guarantee resources.

[0030] Step 3: The satellite CPE that receives the network measurement task performs network measurement on the orbital satellite network and obtains the measurement results. Then, it sends a network measurement result reporting message to the multi-orbit satellite SD-WAN controller.

[0031] Step 4: The multi-orbit satellite SD-WAN controller executes a network optimization algorithm based on the obtained resource capability guarantee information, generates an orbital satellite network selection strategy, distributes it to each satellite communication CPE, and sends a resource application confirmation message to each resource management center based on the final orbital satellite network result. After confirming the use of the orbital satellite network resource, each resource management center reserves resources for the channel unit used by both communicating parties.

[0032] The specific process of step 1 is as follows:

[0033] Step 101: After the satellite CPE starts up, it sends an initial connection establishment message to the multi-orbit satellite SD-WAN controller. The initial connection establishment message includes its own ID information, capability negotiation information, supported networking modes, whether it needs to configure the home outgoing ground station, and the number and number of supported interfaces.

[0034] Step 102: The multi-orbit satellite SD-WAN controller sends an initial configuration message to the satellite communication CPE to establish an initial connection; the initial configuration message includes network slice information, networking mode, and home station list of the satellite communication CPE to which it belongs. The home station list includes the home station satellite communication CPE ID, home station IP address, and home station priority information.

[0035] Step 103: After receiving the initial configuration message, the Satellite Communication CPE sends a station capability update reporting message to the multi-orbit satellite SD-WAN controller. The station capability update reporting message includes all the interface numbers of this CPE, the interface IP address, the IP address of this interface used for network measurement, the IP address of the tunnel interface corresponding to this interface, the IP address of each orbital satellite network channel unit connected to this interface, the channel type, the channel station address, and the channel status.

[0036] The multi-orbit satellite SD-WAN controller receives the site capability update report message and pushes the site capability update message to all other satellite communication CPEs. The message content is the same as the site capability update report message.

[0037] After receiving the initial configuration message, the Satcom CPE sends a service route update report message to the multi-orbit satellite SD-WAN controller. The service route update report message includes user service route information of this CPE, including the ID information of this Satcom CPE, the route network segment, and the route metric.

[0038] The multi-orbit satellite SD-WAN controller receives the service route update reporting message and reflects the service route update push message to all other satellite communication CPEs. The message content is the same as the service route update reporting message.

[0039] In step 102, when the multi-orbit satellite SD-WAN controller sends an initial configuration message to the satellite communication CPE establishing the connection, if home station information is configured for the satellite communication CPE, then after the multi-orbit satellite SD-WAN controller receives the service route update report message from the satellite communication CPE, it sends service route inbound / outbound control messages to all home outbound ground stations. The service route inbound / outbound control messages sent to the home outbound ground stations of the satellite communication CPE carry outbound service route information; the service route inbound / outbound control messages sent to the non-home outbound ground stations of the satellite communication CPE carry inbound service route information.

[0040] The networking mode between satellite communication CPEs is either a two-layer network or a three-layer network. If it is a two-layer network, a two-layer mesh tunnel is established between the interfaces of all satellite communication CPEs and each orbital satellite network channel unit. If it is a three-layer network, a three-layer mesh tunnel is established between the interfaces of all satellite communication CPEs and each orbital satellite network channel unit.

[0041] In step 4, the orbital satellite network selection strategy refers to the tunnel diversion information based on service characteristics. When the satellite communication CPE receives the service message from the user side, it forwards it into the corresponding second-level or third-level tunnel of the orbital satellite network for encapsulation according to the tunnel diversion information, and then sends it to the satellite side.

[0042] In step 4, when the resource capability guarantee information changes, the network optimization algorithm will be re-executed to regenerate the service-based orbital satellite network selection strategy, which will be sent to each satellite communication CPE. Based on the updated orbital satellite network selection results, the resource pre-request message will be resent to each resource management center. After confirming the use of the updated satellite network resources, the resource management center will re-reserve resources for the channel units used by both communicating parties.

Claims

1. A multi-orbit satellite network networking method based on SD-WAN architecture, characterized in that, Specifically, the following steps are included: Step 1: After the initial connection is established between the Satcom CPE and the Multi-orbit Satellite SD-WAN Controller, the Satcom CPE periodically sends normal connection maintenance messages to the Multi-orbit Satellite SD-WAN Controller; the Satcom CPE sends site capability update reporting messages and service routing update reporting messages to the Multi-orbit Satellite SD-WAN Controller; the Multi-orbit Satellite SD-WAN Controller updates and pushes the received reporting messages to other Satcom CPEs. Step 2: After receiving the task plan for networking communication using a multi-orbit satellite network, the multi-orbit satellite SD-WAN controller sends a message to the satellite communication CPE with communication needs in the networking task to execute the network measurement task. If the communication requirements in the networking task require the orbital satellite network to guarantee bandwidth, the multi-orbit satellite SD-WAN controller extracts the station address information of each channel of the satellite communication CPE connection between the two parties in the business communication, sends the resource pre-request to each resource management center of the multi-orbit satellite network, and each resource management center returns the resource pre-request result. The multi-orbit satellite SD-WAN controller prioritizes the use of the orbital satellite network that can guarantee resources. Step 3: The satellite CPE that receives the network measurement task performs network measurement on the orbital satellite network and obtains the measurement results. Then, it sends a network measurement result reporting message to the multi-orbit satellite SD-WAN controller. Step 4: The multi-orbit satellite SD-WAN controller executes a network optimization algorithm based on the obtained resource capability guarantee information, generates an orbital satellite network selection strategy, distributes it to each satellite communication CPE, and sends a resource application confirmation message to each resource management center based on the final orbital satellite network result. After confirming the use of the orbital satellite network resource, each resource management center reserves resources for the channel unit used by both communicating parties. The resource capability assurance information includes the results of resource pre-application, the service assurance requirements, the network measurement results reported by the satellite communication CPE, and the site type capabilities and service routes of each satellite communication CPE.

2. The multi-orbit satellite network networking method based on SD-WAN architecture according to claim 1, characterized in that, Step 1 is specifically... Includes the following processes: Step 101: After the Satcom CPE is started, it sends an initial connection establishment message to the multi-orbit satellite SD-WAN controller; Step 102: The multi-orbit satellite SD-WAN controller sends an initial configuration message to the connected satellite CPE and establishes an initial connection; Step 103: After receiving the initial configuration message, the Satcom CPE sends a site capability update reporting message and a service routing update reporting message to the multi-orbit satellite SD-WAN controller; the multi-orbit satellite SD-WAN controller then pushes the received reporting messages to other Satcom CPEs.

3. The multi-orbit satellite network networking method based on SD-WAN architecture according to claim 1, characterized in that, The networking mode between satellite communication CPEs is either a two-layer network or a three-layer network. If it is a two-layer network, a two-layer mesh tunnel is established between the interfaces of all satellite communication CPEs and each orbital satellite network channel unit. If it is a three-layer network, a three-layer mesh tunnel is established between the interfaces of all satellite communication CPEs and each orbital satellite network channel unit.

4. The multi-orbit satellite network networking method based on SD-WAN architecture according to claim 1, characterized in that, In step 4, the orbital satellite network selection strategy refers to the tunnel diversion information based on service characteristics. When the satellite communication CPE receives the service message from the user side, it forwards it into the corresponding second-level or third-level tunnel of the orbital satellite network for encapsulation according to the tunnel diversion information, and then sends it to the satellite side.

5. A multi-orbit satellite network networking method based on SD-WAN architecture according to claim 1, characterized in that, In step 4, when the resource capability guarantee information changes, the network optimization algorithm will be re-executed to regenerate the service-based orbital satellite network selection strategy, which will be sent to each satellite communication CPE. Based on the updated orbital satellite network selection results, the resource pre-request message will be resent to each resource management center. After confirming the use of the updated satellite network resources, the resource management center will re-reserve resources for the channel units used by both communicating parties.

6. A multi-orbit satellite network networking method based on SD-WAN architecture according to claim 2, characterized in that, In step 102, when the multi-orbit satellite SD-WAN controller sends an initial configuration message to the satellite communication CPE that has established a connection, if home station information has been configured for the satellite communication CPE, then when the multi-orbit satellite SD-WAN controller receives the service route update report message from the satellite communication CPE, it sends service route inbound / outbound control messages to all home outbound ground stations. The service route inbound / outbound control messages sent to the home outbound ground stations of the satellite communication CPE carry outbound service route information; the service route inbound / outbound control messages sent to the non-home outbound ground stations of the satellite communication CPE carry inbound service route information.

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