Method and system for implementing sub-wavelength passage sharing protection by electronic crossing mode

Abstract

The invention discloses a method and system for accomplishing subwavelength channel shared protection by electric cross mode. Branch interface unit de-converge client side business to multi-back board side branch subwavelength signal, and transmitting by back board side interface to electric cross RSU; electric cross RSU crosswise assigning back board side branch subwavelength signal to protection channel of circuitry interface unit back board side branch; circuitry interface unit converging back board side branch subwavelength signal crosswise assigned to circuitry signal and transmitting tooptical fiber line. The invention provides a electric cross mode to accomplish DWDM system subwavelength channel shared ring network protection switching, provides a switching mode of high reliability, processes business more agily, accomplishes a channel shared protection switching for protected fine granularity.

Description

technical field [0001] The invention relates to the service field of an optical communication-intensive wavelength division multiplexing DWDM network system, in particular to a method and system for realizing sub-wavelength channel sharing and protection in an electrical crossover mode. Background technique [0002] In the current optical transmission network, the survivability of the network has become an important design criterion. With the increasing network scale and service capacity and the market demand for high-quality services, the importance of optical transmission network protection functions is also increasing. [0003] In particular, in recent years, the formation of a new generation of transmission network architecture oriented to Internet Protocol IP (Internet Protocol, hereinafter referred to as IP) has gradually changed from IP over SDH (Synchronous Digital Hierarchy, hereinafter referred to as SDH) and WDM (Wavelength Division Multiplexing, hereinafter WDM) ...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent "02145080.3 All-optical network two-fiber bidirectional channel sharing protection device" introduces a method and device for realizing channel sharing protection by using an optical switch, as shown in the attached figure 2 As shown, the optical switching switch 205 controls the pre-switching service route 207 to the post-switching service route 208, and the shared protection channel access switch 206 controls the working channel 203 and the shared protection channel 204, and when the service between A and B fails It is indicated by the cross symbol in the figure; on the one hand, the optical switch switching method is based on the optical power as the starting switching condition, so the performance monitoring of the service is insufficient; on the other hand, the switching granularity is based on the wavelength, which means that it cannot be realized Channel sharing protection with finer granularity, because, with the increase of wavelength division multiplexing WDM aggregation services, the capacity of the same wavelength in the network bandwidth can simultaneously meet the transmission of multiple low-rate services, usually called sub-wavelengths, which It is required that the switching granularity should be in sub-wavelength units

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