A label switching method in dynamic mpls satellite network

Abstract

The invention discloses a label exchange method in a dynamic MPLS satellite network, comprising step 1: peer discovery in the label distribution protocol process, and its specific implementation is to perform peer discovery through real-time update of Hello message neighbors; step 2 : Establish and maintain a label distribution protocol session; Step 3: Establish and maintain a label switching path. The label switching method in the satellite MPLS network provided by the present invention can effectively solve the problem that the data cannot be forwarded due to the disconnection of the satellite link caused by the change of the link environment and network topology of the satellite communication network on the MPLS label switching path. problem, it can be well applied to the satellite network environment. The invention has simple realization, good effect and wide 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 difference...

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

Images