Route distribution method and device applied to hybrid grid optical network

Abstract

The invention discloses a route distribution method and device applied to a hybrid grid optical network. The method comprises the following steps: determining a plurality of alternative routes betweena source node and a destination node in the hybrid grid optical network; for each alternative route, calculating the spectrum compactness of each link according to the grid attribute of the startingnode of each link of the alternative route, and then determining the cost value of the alternative route according to the calculated spectrum compactness; according to the cost value of each alternative route, selecting one alternative route as a final route allocated to the service between the source node and the destination node. According to the invention, the resource defragmentation and rerouting caused by resource defragmentation can be avoided, so the performance of the whole network is improved.

Description

technical field [0001] The present invention relates to the technical field of hybrid grid optical network, in particular to a routing distribution method and device applied to hybrid grid optical network. Background technique [0002] With the rapid growth of new large-capacity services represented by high-definition video services, data center data requests, and distributed services, the data traffic has shown an exponential growth. Lattice optical network has become one of the main directions of optical network development. However, due to the high price of key enabling devices (such as bandwidth variable wavelength selection switches, etc.), the cost of large-scale deployment is too high, and the upgrade of equipment from traditional WDM optical networks to flexible grid optical networks will affect or even interrupt the network. Therefore, the more realistic situation is to partially upgrade the traditional WDM optical network and gradually transition to the flexible g...

AI Technical Summary

Problems solved by technology

However, the fundamental problem of WDM optical network is: In order to reduce the difficulty of network implementation, a "one-size-fits-all" mode is adopted in bandwidth allocation and performance management, that is, channel spacing, signal rate and format, etc. parameters are fixed

For example, the corresponding de-fragmentation operation is performed only when fragments have gradually accumulated to a certain threshold or have caused business congestion, which means that rerouting will occur during this process, which will affect the performance of the entire network

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