An Active Low-Latency Routing Method for LEO Satellite Networks

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 ...

AI Technical Summary

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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