Processing method and processing device for DCC (Data Communication Channel) overhead of SDH (Synchronous Digital Hierarchy) service in packet transport network
A technology of a packet transport network and a processing method is applied in the field of processing methods and devices for SDH service DCC overhead in packet transport networks, and can solve problems such as large data delay and inability to serially buffer data.
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[0082] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0083] Such as figure 2 As shown, in the SDH service DCC overhead processing device in the packet transmission network of the present invention, the external SDRAM solves the requirement of RAM resources for DCC overhead processing, and can perform multi-channel DCC overhead processing, including: external SDRAM, multiplexing processing unit and demultiplexing processing units,
[0084] The multiplexing processing unit includes:
[0085] A number of DCC overhead extraction modules are connected one-to-one with lines 1...n, n is an integer, and the lines refer to the light direction, and one line is one light direction. For example: a 4-way STM-1 SDH service single board has 4 optical ports, then each optical port corresponds to a line, then n=4;
[0086] Several HDLC (high-level data link control) receiving processing modules are connected one-to-one with...
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