An Active Low-Latency Routing Method for LEO Satellite Networks

A low-orbit satellite, active technology, applied in the field of satellite communications, can solve the problem of high packet transmission delay requirements, not optimal, etc., to achieve the effect of reducing the inter-satellite transmission delay

Active Publication Date: 2022-04-15
航天科工空间工程发展有限公司
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Problems solved by technology

The shortest number of hops (the minimum number of relays and forwards from the service source satellite to the service destination satellite) is usually used as the basis for selecting the inter-satellite forwarding path, but the path selected based on this is often not the optimal path, especially for delay-sensitive Business, which has high requirements on the transmission delay of data packets, the shortest hop routing transmission path is not necessarily the minimum delay routing transmission path

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  • An Active Low-Latency Routing Method for LEO Satellite Networks
  • An Active Low-Latency Routing Method for LEO Satellite Networks
  • An Active Low-Latency Routing Method for LEO Satellite Networks

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[0058] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0059] figure 1 A flowchart of an embodiment of an active low-latency routing method for a low-orbit satellite network according to the present application is shown. An active low-delay routing method for a low-orbit satellite network, comprising the following steps:

[0060] S100. Calibrate the routing processing and sending delay D of each satellite node HS .

[0061] In a specific embodiment, the S100 also includes:

[0062] S1000. Sending delay D in calibration route processing HS Empty the forwarding waiting queu...

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Abstract

An embodiment of the present invention discloses an active low-delay routing method for a low-orbit satellite network. The method includes: S100. Calibrate the routing processing transmission delay D of each satellite node HS ; S102, real-time statistics of the queue forwarding delay D of each satellite node QW ; S104, calculating the inter-satellite transmission delay D of two adjacent satellite nodes ij ; S106, each satellite node in a statistical time window T sa Internally count the forwarding waiting delay D of all queues on each port in the star QW and routing processing sending delay D HS , and form a neighbor detection message NeighborMsg, NeighborMsg message to count the time window T sa Sent at each port of the inter-satellite link for the sending period; S108, after receiving the NeighborMsg message, other satellite nodes except the own star generate a one-hop neighbor table, two-hop neighbor table and network topology table according to the NeighborMsg message; S110, by generating The one-hop neighbor table, the two-hop neighbor table and the network topology table are used to calculate the routing table of the local star.

Description

technical field [0001] The invention relates to the technical field of satellite communication. More specifically, it relates to an active low-latency routing algorithm for low-orbit satellite networks. Background technique [0002] In the low-orbit satellite constellation communication network system, each satellite node in the network can perform data communication and information interaction between satellites through the inter-satellite communication link (referred to as the inter-satellite link), and realize the data transmission of the entire constellation network, reaching global No blind spot coverage. At present, many companies such as SpaceX have proposed or are building a low-orbit broadband satellite communication system based on the inter-satellite link network. Using the inter-satellite link to realize the large-scale network of low-orbit satellites has become one of the main development trends of the communication satellite system. . [0003] The low-orbit ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185
CPCH04B7/18521
Inventor 窦宏浩李常亮杨彪章雷刘丽张世杰何文婷
Owner 航天科工空间工程发展有限公司
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