Method and device for multiplying and de-multiplying low speed service

A service multiplexing and demultiplexing technology, which is applied in the field of optical transport network, can solve the problems that OTN cannot bear the weight of data services and low-speed services cannot be multiplexed.

Inactive Publication Date: 2007-10-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] In order to solve the problem that OTN cannot carry data services and any low-speed services cannot be multiplexed in the

Method used

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  • Method and device for multiplying and de-multiplying low speed service
  • Method and device for multiplying and de-multiplying low speed service
  • Method and device for multiplying and de-multiplying low speed service

Examples

Experimental program
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Example Embodiment

[0042] Example 1

[0043] Referring to FIG. 3, an embodiment of the present invention provides a method for multiplexing low-speed services, which adopts a method of automatically identifying the type of low-speed services, and specifically includes the following steps:

[0044] Step 101: Perform clock data recovery processing on the accessed customer service signal to obtain the customer service rate.

[0045] Step 102: Evenly divide the payload area in the OTN frame into multiple time slots, and allocate a corresponding number of time slots to each customer service signal according to the rate of each customer service signal.

[0046] All time slots have the same bandwidth, and the bandwidth of each time slot is the bandwidth of the payload area of ​​the OTN frame divided by the number of time slots. There are various ways of allocating time slots to the OTN frame. For example, time slots can be allocated in a byte-interleaving multiplexing mode or a sequential mode, or can...

Example Embodiment

[0058] Embodiment 2

[0059] Referring to FIG. 6 , an embodiment of the present invention also provides a method for multiplexing low-speed services, which adopts a method of specifying a low-speed service type by a user, and specifically includes the following steps:

[0060] Step 201: The user specifies the customer service type and service rate, and the customer service types include synchronization service and data service.

[0061] Step 202: Evenly divide the payload area in the OTN frame into multiple time slots, and allocate a corresponding number of time slots for each customer service signal according to the rate of each customer service signal; all time slots have the same bandwidth , the bandwidth of each time slot is the bandwidth of the payload area of ​​the OTN frame divided by the number of time slots. There are various ways of allocating time slots to the OTN frame. For example, time slots can be allocated in a byte-interleaving multiplexing mode or a sequenti...

Example Embodiment

[0071] Embodiment 3

[0072] Referring to FIG. 8 , an embodiment of the present invention further provides a method for demultiplexing low-speed services, which specifically includes the following steps:

[0073] Step 301: Receive the OTN frame from the sender, and perform corresponding processing on the received OTN frame, including OTN framing, OTUk / ODUk layer overhead processing, and obtain OTUk OH, ODUk OH, OPUk OH, payload area, FEC , FAS and MFAS.

[0074] Step 302: Determine the mapping relationship between each time slot in the OTN frame and the client service according to PSI[2]-PSI[K+1] (K is the number of timeslots) in the OPUk OH, and determine the type of the client service.

[0075] Step 303: Determine the customer service type, if the customer service type is a synchronous service, go to step 304; if the customer service type is a data service, go to step 305; if the customer service type is an unknown type of service, go to step 306.

[0076] Step 304: Perfor...

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Abstract

The invention is in use for solving the issues that in current technique, optical transmission network (OTN) is unable to load support data operation in low speed, and operation in any low speed cannot be multiplexed. The disclosed multiplexing method includes steps: partitioning OTN frame into multiple time slots, and assigning time slot to operation in low speed based on rate of the operation; if the operation in low speed is synchronization operation, then mapping the operation to the time slot in asynchronization; otherwise, mapping the operation to the time slot after packaging treatment. The multiplexing device includes time slot partition and assignment module and mapping module. The invention makes OTN possible to load support data operation, as well as multiplexes and demultiplexes hybrid services.

Description

technical field [0001] The present invention relates to the field of optical transport networks, in particular to a method and device for multiplexing and demultiplexing low-speed services. Background technique [0002] SONET (Synchronous Optical Network, Synchronous Optical Network) / SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy) as a mature transmission technology, can meet the access, multiplexing, scheduling, management and protection of various customer services; With the increase of TDM (Time Division Multiplex, time division multiplexing) and WDM (Wavelength Division Multiplexing, wavelength division multiplexing) technologies. In the existing network, especially the metropolitan area network environment, there are both traditional voice services and a large number of data services. Therefore, it is necessary to solve the transmission of mixed services. [0003] Compared with SONET / SDH and WDM (Wavelength Division Multiplexing), OTN (Optical Transp...

Claims

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Application Information

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IPC IPC(8): H04J14/00H04J14/02H04J3/16
CPCH04J3/1652H04J3/1664H04J2203/0082H04J3/12
Inventor 张建梅刘玥
Owner HUAWEI TECH CO LTD
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