Double-node interconnection protection method and system

Abstract

The invention discloses a double-node interconnection protection method, and the method comprises the steps: employing SNCP (subnetwork connection protection) to combine a backbone scheduling ring and a business downloading ring into a business scheduling downloading ring; enabling the business scheduling downloading ring to be intersected with a first convergence ring at a first network element and a second network element; enabling the business scheduling downloading ring to be intersected with a second convergence ring at a third network element and a fourth network element; enabling the source time slot of the first network element to be configured at a link side of the first convergence ring; enabling the working time slot of the first network element to be configured in the direction of the second network element; enabling a protection time slot of the first network element to be configured in the direction of the third network element; and enabling the time slot, passing through the first network element, of the second network element to arrive at the fourth network element. The invention also discloses a double-node interconnection protection system.

Description

technical field [0001] The invention relates to node protection technology in a transmission network, in particular to a method and system for dual-node interconnection protection. Background technique [0002] As the information society has higher and higher security requirements for the transmission network, the security of the core layer carrying a large number of business scheduling becomes more and more important. Active / standby automatic protection of core node services is an inevitable choice to provide core layer security. However, due to the use of complex Dual Node Interconnection (DNI, Dual Node Interconnection) protection technology, it is difficult to realize automatic active / standby switchover of services in Synchronous Digital Hierarchy (SDH, Synchronous Digital Hierarchy). Such as figure 1 As shown, the existing DNI protection network includes a four-layer ring network, which are: a backbone dispatching ring, a service download ring, a convergence ring, and...

AI Technical Summary

Problems solved by technology

[0009] With the explosive growth of the number and types of services, especially group access services and broadband services, it is required that the protection capability of the network should also be simple to maintain, consume less resources, and open up services in different levels. The existing DNI protection technology is difficult To meet the needs of business development and maintenance, and, with the increase of business volume, it is necessary to maximize the use of network resources, the existing DNI protection technology cannot realize the repeated use of the same serial number time slot in the multiplex section protection ring , wasting network resources

Images