Update method and device for topology state data based on low-orbit satellite link

Abstract

The embodiment of the invention provides an update method and device for topology state data based on low-orbit satellite links. The method comprises the following steps: calculating location information of all satellites in a satellite network according to operating orbit information of all the satellites in the satellite network and the location information of a target satellite; determining neighbor satellites of the target satellite and generating first local topology state data; separately sending detection data packets to each neighbor satellite, and determining the on-off state of a link between each neighbor satellite and the target satellite; if the link between each neighbor satellite and the target satellite is connected, stopping flooding the first local topology state data to the neighbor satellites; and if the link between at least one neighbor satellite and the target satellite is disconnected, updating the first local topology state data, and flooding the updated first local topology state data in the entire network. By adopting the update method and device provided by the embodiment of the invention, the convergence time of the satellite network can be shortened, and the time delay of the entire satellite network can be reduced.

Description

technical field [0001] The invention relates to the technical field of satellite networks, in particular to a method and device for updating topology state data based on low-orbit satellite links. Background technique [0002] Satellite networks are playing an increasingly important role in global communications, navigation and positioning, weather forecasting, environment and disaster monitoring, resource detection, and military applications. Satellite network routing protocols, as the core of satellite network communication protocols, undertake inter-satellite data The important task of transmission determines the overall performance of the constellation network. [0003] Each satellite in the satellite network is used as a router, and the space segment of the entire satellite network is used as an autonomous system. The satellite network of the low-orbit satellite in the prior art adopts the OSPF (Open Shortest Path First, open shortest path first) routing protocol, and t...

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Problems solved by technology

[0007] It is worth noting that in the existing OSPF routing protocol, no matter whether the link status between the target satellite and its surrounding satellites is on or off, the target satellite will flood the topology state data to the surrounding satellites, which is The convergence time of the entire satellite network is too long, which in turn increases the delay of the entire satellite network

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