Service recovering method, system and node device

Abstract

The present invention relates to the technical field of network communications. Embodiments of the present invention disclose a method for service restoration. The method includes: a node equipment receives a restoration path establishment request which carries a restoration path number corresponding to the service needing restoration; according to the restoration path number, the node equipment obtains restoration path information corresponding to the service and current available time slots both of which are preset in the node equipment; according to the restoration path information, the node equipment judges whether the node equipment is an end node of the service; if not, the node equipment configures at least two restoration channels according to the current available time slots, establishes the cross-connection between at least two restoration channels, and sends the restoration path establishment request to a downstream node according to the restoration path information. The embodiments of the present invention also disclose a system for service restoration and node equipments. The technical solutions of the embodiments of the present invention can accelerate the service restoration speed, and save the system resources effectively.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a service recovery method, system and node equipment. Background technique [0002] The optical transport network (Optical Transport Network, OTN) technology is a new generation of standardized digital transmission architecture, which is used to transmit correspondingly adapted payloads on the optical fiber transmission network. [0003] OTN defines the electrical layer encapsulation structure. Client signals need to be mapped to an overhead processing unit (Overhead Processing Unit, OPU). The OPU can be encapsulated into an optical channel data unit (Optical channel Data Unit, ODU). ODU can be encapsulated into an Optical Channel Transport Unit (Optical ChannelTransport Unit, OTU), or multiple low-order ODUs (low-rate ODUs) are multiplexed into one high-order ODU (high-speed ODU), and the high-order ODUs are repackaged To an OTU, the OTU can be transmitted using o...

AI Technical Summary

Problems solved by technology

[0013] The inventor found in the process of practicing the existing technology that the existing business recovery method requires the intermediate node to parse the complicated Path message and forward the Path message, which consumes more system resources and leads to a slow business recovery speed

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