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 a packet transport network, and can solve problems such as large data delay and inability to serially buffer data.

Active Publication Date: 2012-09-12
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

This is the second problem: the DCC data forwarded to each optical direction on the board is parallel, and the data from the backplane side cannot be serially buffered, otherwise the data delay in some optical directions will be greatly delayed

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  • Processing method and processing device for DCC (Data Communication Channel) overhead of SDH (Synchronous Digital Hierarchy) service in packet transport network
  • Processing method and processing device for DCC (Data Communication Channel) overhead of SDH (Synchronous Digital Hierarchy) service in packet transport network
  • Processing method and processing device for DCC (Data Communication Channel) overhead of SDH (Synchronous Digital Hierarchy) service in packet transport network

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Embodiment Construction

[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 transport 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 th...

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Abstract

The invention relates to a processing method and a processing device for the DCC overhead of SDH service in a packet transport network. The system comprises an external SDRAM (synchronous dynamic random access memory), moreover, the system adopts an SDRAM-based trilevel cache structure, the first level of cache exists in an Ethernet-to-multichannel HDLC (High-level Data Link Control) demultiplexing module, the second level of cache is the SDRAM, the third level of cache exists in an HDLC transmission processing module, the first level of cache and the third level of cache assist the second level of cache to carry out a multichannel parallel DCC overhead data storage and forwarding function and adaptation function of a back panel side Ethernet clock rate and a line side overhead clock rate; and the space of the second level of cache as the SDRAM is uniformly allocated according to the number of DCC overhead channels to be processed. The processing method and the processing system disclosed by the invention utilize the external SDRAM to satisfy the demand of DCC overhead processing on RAM resource, and can carry out multichannel DCC overhead processing, and moreover, the designed SDRAM-based trilevel cache structure can effectively meet the requirement of multichannel DCC overhead data on parallel transmission.

Description

technical field [0001] The invention relates to the technical field of service processing in a packet transport network (PTN), in particular to a method and device for processing SDH service DCC overhead in a packet transport network. In particular, it refers to a processing method and device suitable for DCC overhead of multiple optical interface SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy) services in a packet transport network (PTN). Background technique [0002] A considerable part of the existing transport network is SDH equipment and SDH-based ASON (Automatically Switched Optical Network) equipment. The management communication network (MCN) used to manage the transport network has two modes: in-band and out-of-band. The MCN can adopt an in-band mode, an out-of-band mode, or a mixed implementation of the two. The in-band mode means that management information is carried in the embedded control channel (ECC) or dedicated communication channel, whe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/56H04L12/869
Inventor 杨虎林陈飞月
Owner FENGHUO COMM SCI & TECH CO LTD
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