Method of network fault recovery crossing over connections in multiple domains

Abstract

Its system consists of: a transmission platform including a network composed of multi net elements that are used to assign and build links, and to build connection between subnets; and a control platform including multi control nodes. Each net element in the transmission platform corresponds to a control node. The invention can automatically build the static or dynamic protective connection used to recover the inter-domain failure by building cross-domain normal connection, determining intra-domain protection mechanism, and determining inter-domain protection mechanism.

Description

technical field [0001] The present invention relates to a general transport network, including a network fault recovery method in the field of transport networks such as IP transport network, Ethernet, ATM network, SDH and OTN, and in particular to a method for effectively utilizing network bandwidth resources to establish cross-domain normal connections and protection The method of connection not only guarantees business recovery in case of intra-domain failures, but more importantly, effectively restores services and fully optimizes the use of network resources when inter-domain failures affect services. Background technique [0002] According to the current ITU standard recommendations G.841 and G.842, the transport network adopts static protection methods for fault recovery methods. These methods establish a corresponding protection connection for an end-to-end connection, or allocate resources for the protection connection. The end-to-end connection here can be a single...

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Problems solved by technology

[0007] (1) The inter-domain subnet connection protection technology can only recover from link failures, and does not consider the protection of gateway network element failures

[0008] (2) When the gateway fails, if the fault recovery is carried out in a larger recovery domain, the network scale involved in the routing calculation and the connection establishment of each network element is very large, and the calculation is complicated, which affects the recovery efficiency

[0009] (3) The existing recovery technology literature patents do not take into account how to effectively recover from various faults between domains. Although these technologies can be used to recover from faults between domains, they do not support the establishment and recovery of business connections in real time. In the system, the establishment of cross-domain connections is a fully automatic process. Therefore, how to apply these methods to inter-domain faults requires a complete automatic system process. This automatic system process includes: the operation of realizing inter-domain recovery It should be organically combined with the operations in the domain

Without this automatic implementation system, the real-time performance of connection establishment cannot be guaranteed

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