Centralized spectrum-flexible optical network information synchronous method and system

Abstract

The invention provides a centralized spectrum-flexible optical network information synchronous method and a system. In the system, an RCM (Resource Centralized Management) node and a plurality of general nodes are allocated in each field; a TED (Traffic Engineering Data Base) is arranged in the RCM node and used for storing the node information and resource information, including the spectrum resource information of links of the whole field; meanwhile, the RCM node receives the damage information sent by a damage monitoring and evaluation module, and updates the damage information in the TED in a real time manner; the RCM node completes the selection to the network business tracks according to the information stored in the TED, and selects suitable spectrum and modulation format for the business; after the spectrum resource allocation for the network business is completed, the RCM node updates the information in the TED according to records; and the general nodes are only responsible for the flooding of the information about the nodes, that is, the information is flooded in the network only when the network node goes wrong, is deleted or is added, so as to realize node information synchronization.

Description

technical field [0001] The present invention relates to the technical field of spectrum flexible optical network, in particular to a centralized spectrum flexible optical network information synchronization method and system. Background technique [0002] The prominent feature of the spectrum flexible optical network is to dynamically allocate spectrum bandwidth of corresponding size to the business according to the demand of the business. That is, the spectrum flexible optical network uses the all-optical network to allocate continuous subcarriers to services. Compared with the traditional wavelength division multiplexing network, the subcarriers here have a smaller wavelength granularity, which can better match transmission services of different sizes and improve the spectrum utilization of the network. rate, reducing the blocking rate. [0003] Since the spectrum flexible optical network is based on subcarriers with smaller granularity, the network dynamically allocates ...

AI Technical Summary

Problems solved by technology

[0016] Since the amount of information in the spectrum flexible optical network has increased a lot compared with the wavelength switched optical network (such as spectrum resource information on the link, service-related modulation format information, and increased signaling information in the network), once various services in the network change frequently , the amount of network information flooding and various signaling information in the network will be large, resulting in longer network synchronization time and signaling processing time, causing nodes in the entire network to not grasp the latest network status information, resulting in information distortion , leading to resource occupation (resources allocated by the source node have been reserved and used by other connections) and misjudgment of optical path transmission quality (some physical damage, such as crosstalk, nonlinear effects, etc.), causing network blocking rate to increase and network performance to decrease

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