Implementation Method of Service Transmission in Optical Transport Network

Abstract

The invention discloses an implementation method of the service transmission in an optical transmission network. The method includes the steps as follows: the service input unit and the service output unit are configured with the same system clock or the same source system clock; the service data received from the external is stored and adjusted by the service input unit according to the system clock; the adjusted service data, the frame head signal received from the external, the system clock and the generated adjustment indication information are encapsulated into a SDH frame signal; the SDH frame signal is transmitted to a core cross unit; the service output unit receives the SDH frame signal from the core cross unit; the service output unit outputs the adjusted service data in the SDH frame signal according to the adjustment indication information, the system clock and the service recovery clock. Based on the implementation method of the service transmission in the optical transmission network, the ODU service can be transmitted through the SDH device; various mapping modes are fulfilled; the implementation method is simple; the high quality service clock signal can be recovered.

Description

technical field [0001] The invention relates to the field of optical network technology, in particular to a method for realizing service transmission in an optical transmission network. Background technique [0002] With the development of science and technology and the demand of the market, the expansion of communication capacity is promoted. Communication transmission technology has gone through several development stages, from the initial PDH (plesynchronous digital hierarchy) technology to SDH (synchronous digital series all synchronous digital hierarchy) technology, and then to OTN (optical transport network) and WDM (wavelength division multiplexing) technology, the emergence of each new transmission technology is based on the existing technology, the new technology Products need to be compatible with legacy products. In the case that a large number of SDH networks already exist, OTN products need to coexist compatible with SDH networks, OTN services can be transmitte...

AI Technical Summary

Problems solved by technology

[0004] The mapping method given in the standard is a general method, which is suitable for all applications. The recovered clock jitter of the service is relatively large, and it is necessary to use a method such as the patent CN1848717A to reduce the clock jitter value, and the recovery method is complicated.

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