An adaptive survivable satellite routing method based on virtual nodes

Abstract

The invention discloses an adaptive anti-destroy satellite routing method based on virtual nodes. The specific implementation steps are: when the satellite routes the received data packets, it first perceives the change of the virtual node corresponding to the satellite and the whole network pre-saved by the satellite. The change of the on-off state of the inter-satellite link triggers the update of the routing table to generate a routing table with the shortest and second shortest paths; then, the next hop is determined for the data packet from the primary and alternate next hops through the active-standby switchover strategy. When the main and alternate next hops are unavailable due to heavy load, select the one with a smaller link occupancy rate as the next hop; when the virtual node corresponding to the satellite is switched or the state of the inter-satellite link is changed in the present invention , triggering routing updates, making the routing invulnerable, and adopting the active-standby switching strategy to determine the next hop for the received data packets, so that the routing can handle network congestion more effectively.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a virtual node-based self-adaptive anti-destruction satellite routing method. Background technique [0002] The backbone nodes in the LEO satellite network are all low-orbit high-speed moving satellites, and the network topology is in a state of continuous high-speed change. On the other hand, due to the uneven distribution of users in the global region, the dense population near the equator and low-latitude regions has relatively low traffic demand. However, polar regions and ocean regions have less demand for traffic, resulting in network congestion in areas with large traffic demand. Therefore, the existing ground routing methods cannot be directly applied to satellite networks, and need to be targeted at the characteristics and congestion of satellite networks. The problem is to design a specific routing algorithm suitable for LEO satellite networks. [000...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this scheme is that when multiple nodes or multiple inter-satellite links in the network fail, the routing performance drops sharply and lacks adaptive invulnerability. In addition, this scheme only relies on the current node's link The congestion situation does not consider the congestion situation of the next hop node for congestion avoidance, which cannot handle network congestion well

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