Coding method and coding system capable of transmitting clock and data based on phase modulation

Abstract

The invention discloses a coding method and a coding system capable of transmitting clock and data based on phase modulation, and relates to the field of digital signal transmission coding. The method comprises the following steps of: S1, setting coding frequency of a transmitting end to be quadruple of output frequency, and switching to a step S2; S2, defining interval coding between two neighboring data frames as '1100', defining coding of information data transmitted to a receiving end by the transmitting end when bit='1' as '1110', defining coding of the information data transmitted to the receiving end by the transmitting end when bit='0' as 1000, and switching to a step S3; S3, transmitting the information data to the receiving end by the transmitting end, and simultaneously transmitting complete clock information, frequency information and frame alignment pulse signals during the transmission process. With the method and the system, transmission of three types of signals of clock, frame alignment pulse and information and control data buses can be completed through one signal bus, the number of interconnection signals is reduced, and resource is used reasonably, so that the method and the system are suitable for being generalized.

Description

technical field [0001] The invention relates to the field of digital signal transmission encoding, in particular to an encoding method and system for transmitting clock and data based on phase modulation. Background technique [0002] In the optical network, in order to support the bearer functions of the telecommunication network, frequency synchronization network and time synchronization network, the optical network transmission equipment (such as PTN, IPRAN, OTN, etc.) Time synchronization function. [0003] In order to realize the above functions, the transmission equipment of the optical network is designed with a frequency synchronization core unit and a time synchronization core unit. When the transmission device is in use, the service disk obtains the frequency synchronization signal of the system from the backplane, and the time synchronization core unit provides the frequency synchronization signal, frame alignment pulse, time synchronization pulse and time inform...

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Problems solved by technology

[0005] As mentioned above, in terms of time synchronization, a time synchronization clock bus, second pulse bus and time information bus are also required. The independent transmission of signals by the above buses will occupy multiple terminal resources on the system backplane, which is not conducive to the simplification of the internal interconnection of the system and the utilization of resources. Unreasonable, especially problematic for large devices with too many interconnecting signal lines

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