Label switching method in dynamic MPLS satellite network

Abstract

The invention discloses a label switching method in a dynamic MPLS satellite network. The label switching method includes the steps that first, peer discovery is performed in a label distribution protocol process and concretely achieved through real-time update of Hello message neighbors; second, a session of a label distribution protocol is established and maintained; third, a label switching path is established and maintained. Through the label switching method in the MPLS satellite network, the problem that data cannot be forwarded because of satellite link disconnection resulting from changes of the link environment and the network topology structure of the satellite communication network on the MPLS path can be effectively solved, and the label switching method can be well applicable to the satellite network environment. The label switching method is easy to implement, good in effect and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of satellite multi-protocol label switching (MPLS), in particular to a label switching method in a dynamic MPLS network on a satellite. Background technique [0002] With the development of satellite communication technology, the satellite has developed from the original transparent forwarding to the ability of on-board switching and processing. At present, the space-borne switching system mainly includes space-borne ATM switching and space-borne IP switching. The protocol overhead of the spaceborne ATM switching method is large, the scalability is not strong, the signaling is complicated, and it cannot be seamlessly connected with the ground IP network. Onboard IP switching is based on a hop-by-hop forwarding strategy. Each hop needs to perform a table lookup for the longest IP prefix match, resulting in slow onboard forwarding rates and weak QoS guarantee capabilities for pure IP switching. The differen...

AI Technical Summary

Problems solved by technology

This long-delay feature brings new problems to the QoS guarantee of satellite MPLS network services, the discovery and maintenance of MPLS peers, the exchange of LDP information, and the establishment of constraint-based LSP paths;

[0006] (3) On-board computing resources are limited

[0009] (2) The network topology changes frequently

[0010] (3) Satellite communication network resources are limited

[0024] The traditional label distribution protocol is the core control protocol of MPLS, which does not consider the characteristics of satellite network topology changes

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