Method for realizing load balance in automatic exchange optical network

Abstract

The invention relates to a method for realizing load balancing based on synchronous digital hierarchy in an automatic switch optical network, which comprises: adopting multiple Dijkstra algorism to calculate a plurality of disjoint paths from a source node to a destination node; adopting a route calculation module to attain the available bandwidth of all chains contained in each disjoint path, adopting the minimum available bandwidth of all chains contained by each disjoint path as the maximum available bandwidth provided by the disjoint path, dividing the maximum available bandwidth of each disjoint path by the path index of the path to attain the load index of each disjoint path, and selecting a best path from a plurality of disjoint paths according to the load index. The load balancing method can reduce the service amount affected by accident network resource and can keep a certain redundancy in all resources in a network to provide protection and recovery for existed services, thereby reducing the failure rate of service protection and recovery.

Description

Technical field [0001] The invention relates to a method for realizing load balancing in an automatic switching optical network, in particular to a method for realizing load balancing in an automatic switching optical network ASON based on the synchronous digital series SDH, which can be applied to ASON networks of SDH and other various types Traffic engineering network. Background technique [0002] As various networks, especially traditional IP networks, have continuously improved requirements for service quality, traffic engineering TE technology has become more and more practical. From IP network to MPLS network to GMPLS network, traffic engineering has begun to be applied in large numbers. [0003] Especially in terms of transmission network, the rapid development of ASON, which uses GMPLS-TE protocol family as the control plane, based on SDH transmission equipment, has brought many automatic control methods to optical networks, such as automatic neighbor discovery and autom...

AI Technical Summary

Problems solved by technology

[0011] The main method to solve load balancing in the prior art is to use the number of packets to be forwarded in the network layer data buffer to measure the load level. This method is not suitable for networks based on traffic engineering, especially for non-packet switched networks. , for example, SDH-based ASON network

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