Method and device for restoring parallel cross-domain fault of multilayer and multi-domain distributed optical network

Abstract

The invention provides a method and a device for establishing and restoring a link in a cross-domain way under a multilayer and multi-domain distributed optical network. The method comprises the following steps of: when an upper-layer routing device establishes a working path, calculating and establishing an inter-domain restoration path between adjacent domains based on the working path by utilizing a calculation method based on a link restoration path between adjacent domains. When the inter-domain working path has a fault, intra-domain restoration paths of a passing domain of the inter-domain restoration path are established by using a parallel signaling mechanism to realize the establishment of a cross-domain fault restoration path and improve the viability of cross-domain services. The inter-domain path of the restoration path establishes or preserves resources in advance in the process of establishing the working path, and the intra-domain paths are established after the fault is detected, which not only ensures cross-domain resource usability during restoration, but also avoids resource waste caused by establishing the intra-domain restoration paths in advance. The intra-domain restoration paths are established in parallel, which can reduce the time of establishing the restoration paths, and can simultaneously process faults when a plurality of cross-domain links have the faults simultaneously to avoid waiting in lines.

Description

technical field [0001] The invention relates to a method and device for recovering cross-domain faults in a multi-layer and multi-domain distributed optical network, and belongs to the technical field of distributed optical networks. Background technique [0002] While the ever-evolving optical transport network is developing toward large capacity, integration, and intelligence, the structure of the optical network is gradually divided into different domains according to the requirements of management, survivability, and technology. for different domains. Whether it is a service-oriented architecture (Service-Oriented Architecture) or a user-oriented architecture (User-Oriented Architecture), it is to solve a large number of large-scale, high-bandwidth, The real-time business continues to increase, and the information interaction between multiple domains is becoming more and more significant. Multi-domain switching increases the logical hierarchy of the optical network, ma...

AI Technical Summary

Problems solved by technology

For example, IETF solves the problem of end-to-end path computation in a large multi-domain network by configuring the path computation element (PathComputation Element PCE) function module. Using a centralized method may result in poor rerouting performance, so it is necessary to cooperate with pre-calculated routing or preset routing to meet the requirement of circuit recovery time <1s

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