Method and device for establishing cross-domain path

Abstract

The invention provides a method and equipment for establishing a cross-domain path. The method includes: a transmission network controller set in the first network receives a request for establishing a cross-domain path, and the request for establishing a cross-domain path includes first and last node information and bandwidth information of a target path; according to topology information and TE information of the first network, obtaining The first sub-path of the target path in the first network; allocate network resources for links between nodes on the first sub-path according to the bandwidth information, so that each node can establish a connection; send to the second border node of the second network The path message is used for the second border node to run the signaling protocol in the GMPLS protocol stack according to the path message to establish the second subpath of the target path in the second network, and complete the connection between the nodes on the second subpath; After receiving the network resource corresponding to the cross-domain link sent by the second border node, an indication message is sent to the first border node, so that the first border node connects the first sub-path and the second sub-path.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method and device for establishing a cross-domain path. Background technique [0002] The traditional optical network is a system based on manual management. The creation, maintenance and removal of optical connections require manual intervention. With the continuous growth of the type and quantity of services carried by the network, the traditional optical network can no longer meet the dynamic requirements. , Flexible networking requirements. Therefore, ITU-T for ITU Telecommunication Standardization Sector (ITU-T for short) proposed the Automatically Switched Optical Network (ASON) architecture, compared with the traditional optical network , the control plane is introduced in ASON, and the link management, routing and signaling functions of the control plane are realized through the Generalized Multi Protocol Label Switching (GMPLS) protocol stack, so...

AI Technical Summary

Problems solved by technology

[0003] Since the distributed control architecture is adopted in ASON, in actual application, if multiple different nodes calculate the path at the same time, they may select the same link resource in a certain section in the middle of the path. When the link is established, At this link resource, these paths will cause signaling rollback due to collision

Images