Method, device and system for protection switching of packet transport network

Abstract

The embodiment of the invention discloses a method for protection switching of a packet transport network, comprising the following steps: receiving a data packet from the packet transport network at a node inlet port, detecting whether the data packet is wrong or not according to the physical-layer information of the data packet, and acquiring port error rate of a link according to the detected result; and comparing the relation of the acquired port error rate and a preset port error rate threshold, if the port error rate is larger than the preset port error rate threshold, triggering protection switching. By utilizing the embodiment of the invention, the condition of degradation of performance in the network can be effectively detected, and the survivability of the network is improved. Similarly, the embodiment of the invention discloses a device and system applying the method.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method, device and system for protection switching of a packet transmission network. Background technique [0002] With the development of communication networks, the types of services carried by mobile networks and fixed networks are changing from circuit-based voice services to packet-based data services. PTN (Packet Transport Network, Packet Transport Network) has become the focus of attention hot spot. PTN is a network with connection-oriented networking characteristics implemented by technologies such as MPLS-TP (MultiProtocol Label Switching-Transport Profile, multi-protocol label switching-transport) and PBT (Provider Backbone Transport, operator backbone network transmission), supporting multiple Packet features such as graded QoS (Quality of Service), flexibility, scalability, label forwarding, and statistical multiplexing, as well as end-to-end transmis...

AI Technical Summary

Problems solved by technology

However, when the transmission quality of the optical fiber link is degraded, the luminous power of the transmission equipment is too low, the poor contact of the connector and other network nodes and lines cause the network transmission quality to be poor, and then cannot meet the service delay, jitter, bit error / packet loss, etc. Transmission performance requirements, and lead to the degradation of PTN line transmission quality, such as link degradation, optical attenuation, and a small number of bit errors, because no continuous CC message is lost, the existing protection mechanism cannot detect the above performance degradation In this case, the protection switching cannot be triggered

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