Method and device for establishing cross-domain paths

Abstract

The present invention provides a method and a device for establishing cross-domain paths. The method comprises: a transmission network controller set in a first network receives a request for establishing a cross-domain path, and the cross-domain path request comprises first and last node information and bandwidth information of the target path; based on the topological information of the first network and the TE information, a first sub-path of the target path in the first network is received; network resources are allocated for links among the nodes on the first sub-path to allow all the nodes to be in the connection, according to the bandwidth information; path messages are transmitted to second boundary nodes of a second network to allow the second boundary nodes to build a second sub-path of the target path within the second network, based on signaling protocols in a path message GMPLS operating protocol stack, and connection among the nodes of the second sub-path is achieved; and after the network resources in correspondence to inter-links transmitted by the second boundary nodes is received, an indication message is sent to the first boundary node to allow the first boundary nodes to be connected with 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 dismantling of optical connections all require manual intervention. , Flexible networking requirements. Therefore, the International Telecommunication Union Telecommunication Standardization Sector (ITU-T for ITU Telecommunication Standardization Sector, referred to as: ITU-T) proposed the Automatically Switched Optical Network (Automatically Switched Optical Network, referred to: ASON) architecture, compared with the traditional optical network. , The control plane is introduced into ASON, and the link management, routing and signaling functions of the control plane are implemented through the Generalized Multi Protocol Label Switching (Generalized Multi Protocol Label...

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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

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