Service restoration method

Abstract

Based on the mutual independence between the service level agreement (SLA) and the recovery priority, when the heavy route happens, the method comprises: the head node of the heavy route service ranks the service needing to make heavy route according the different recovery priority; according to the result of ranking and the known sequence of link resource usage and occupation, firstly recovering the service with high recovery priority.

Description

technical field [0001] The present invention relates to the technical field of digital communication, in particular to an automatic switching optical network, and in particular to a method for guaranteeing priority recovery of high recovery priority services on the basis of mutual independence of SLA (Service Level Agreement; Service Level Commitment) and recovery priority. business recovery methods. Background technique [0002] In the prior art, Synchronous Digital Hierarchy (SDH: Synchronous Digital Hierarchy), Synchronous Optical Network (SONET: Synchronous Optical Network) data and Optical Transport Network (OTN: Optical Transport Network) are traditionally designed to transmit voice services. [0003] With the rapid development of data services, in order to meet the needs of data service transmission, the network connection provision method should transition from static provision of permanent connections to signaling-based soft permanent connections and switched connec...

AI Technical Summary

Problems solved by technology

However, the defect of this method is that the recovery success rate cannot be guaranteed when the link resources are relatively tight, that is, if most of the link resources have been used, especially some link resources are used by low-priority services, At this time, the high-priority recovery request cannot preempt the low-priority link resources because there are no idle link resources, which will lead to recovery failure.

Images