Business connection establishment method, path computing unit device and network system

Abstract

The invention discloses a business connection establishment method capable of improving reliability of business connection, a path computing unit device and a network system. The method comprises the following steps: acquiring information of the source node and destination node of a business, wherein the information of the source node and the destination node comprises information of signal types respectively supported by the source node and the destination node; acquiring information of electricity relay units in other nodes except the source node and the destination node, wherein the information of the electrical relay units at least comprises node identification information of the electrical relay units and information of signal types supported by the electrical relay units; acquiring a head node as the source node and an end node as the destination node and passing through one route of at least one electrical relay unit in the other nodes; and triggering and establishing one end-to-end business connection of the route, wherein the information of the signal types supported by the electrical relay unit passed by the business connection is in accordance with the information of the signal types supported by the source node and the destination node.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a service connection establishment method, a path calculation unit device and a network system. Background technique [0002] With the development of communication technology, optical network has become the core of future wide area network and metropolitan area network. At present, a wavelength division multiplexing (WDM, Wavelength Division Multiplexing) optical network has appeared, and the WDM optical network can perform signal multiplexing, transmission, amplification, routing and recovery in the optical domain. There are generally some signal impairments during the signal transmission process of the WDM optical network, so the WDM network generally reduces or eliminates the signal impairment introduced in the optical domain transmission through the electrical relay unit during the signal transmission process. [0003] Taking the transmission of service data in...

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Problems solved by technology

[0004] During the research and practice of this method, the inventor of the present invention found that: in the prior art, when the electrical relay unit fails, according to the existing rerouting mechanism, both service connections need to be rerouted , but since the electrical relay unit is the end node and the first node of the two service connections respectively, rerouting cannot be performed at this time, resulting in the interruption of the service connection and the interruption of the service

Therefore, the reliability of the service connection established by the prior art is poor

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