Hierarchical switched network logical channel self-healing method

Abstract

The present invention relates to a hierarchy type switched network self-recovery method. Hierarchy type switched network logic channel is composed of multiple physics channels, when some physics channel or switchboard port occurring fault, the communication load distributed to said channel must be switched to other physics channel belonging to same logic channel. The present invention provides a fast zero channel fault detection method, after channel being fault, setting-up systematical fault state, transition state and normal state, using action, event and state conversion to realize channel recovering, at the same time utilizing interactive process in channel recovery process determining channel round-trip delay, being used as channel and port parameter for other protocol or software module to use. Said invention provided fast self-recovery method can overcame channel fault to user real-time communication infection. Said invention provided fault detection method can be used for other occasion possess of 1 1 or N: 1 spare channel spare channel.

Description

technical field [0001] The invention relates to the fields of automatic recovery of network faults, quality assurance of real-time communication and network communication protocols. Background technique [0002] Hierarchical switching network (Chinese patent application 03120998.X, hereinafter referred to as hierarchical network) is a network whose topological structure is structured according to hierarchical structure, and its address space is also allocated according to hierarchical structure, and the hierarchical structure of topology and the hierarchical structure of address structure are strictly matched. It replaces IP Routing with IP Switching by redefining the network topology, the method of network address allocation, and the relationship between the two, avoiding routing operations, and realizing data packets according to hierarchical addresses. It can be exchanged in a timely manner, thereby improving the performance of network nodes and simplifying the complexit...

AI Technical Summary

Problems solved by technology

The disadvantage of this approach is that, first, sending Hello packets specially will occupy the channel bandwidth, so they can only be sent regularly and sparsely, resulting in a long time for judging invalidation; The response of the Hello message, it cannot immediately determine that the link or the other node has failed

[0014] The main problem with this self-healing method is that there are strict restrictions on the use of the channel, which is not conducive to the direct use of light waves

At the same time, it also increases the cost and complexity brought by SDH facilities

[0015] In addition, there is a technology called Resilient Packet Ring (RPR), which also uses the reverse loop of the optical fiber ring to forward the communication load on the failed ring. The protocol level of its self-healing control is higher than that of SDH, but this method only It can be used in a specific metro network, so it will not be described here

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