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Method supporting multi-service access and output and system thereof

A multi-service access and service technology, applied in the access and transmission fields of optical transport networks, can solve the problems of small data service bandwidth and low transmission efficiency, and achieve convenient scheduling functions, flexible service cross-multiplexing, and easy addition and drop. The effect of multiplexing

Inactive Publication Date: 2010-04-14
ZTE CORP
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Problems solved by technology

Although this method improves the utilization rate of transmission bandwidth, the bandwidth of data services is generally smaller than that of OPUk, and a large number of GFP idle frames need to be inserted for rate adaptation, so the transmission efficiency of this method is relatively low

Method used

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  • Method supporting multi-service access and output and system thereof
  • Method supporting multi-service access and output and system thereof
  • Method supporting multi-service access and output and system thereof

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Embodiment Construction

[0020] The basic idea of ​​the present invention is: the sending end maps multiple data service signals of different rates or single channels into the GFP frame, performs rate adaptation and then maps them into ODU0 to realize cross-multiplexing, and then divides time slots and Synchronously mapped to the OTN frame, converted and sent through the OTN; after receiving the OTN frame, the receiving end performs OTN deframe processing to recover multiple low-rate data services.

[0021] It should be noted that ODU0 is an optical channel data unit provided in the present invention, and its rate is half of the rate of OPU1 ie 2.48832 Gbps. Moreover, the ODUk frame structure includes OPUk for carrying payload data and frame header overhead bytes. ODUk is equivalent to the channel layer, and the optical channel transport unit OTUk is equivalent to the section layer. On the basis of the ODUk frame, the frame header of the OTUk is set OTUk frame is obtained by overhead bytes.

[0022] ...

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Abstract

The invention discloses a method supporting multi-service access and output and a system thereof. At a transmission terminal, multiple channels of data service signals with different rates or a single channel of data service signals are mapped into a GFP frame, mapped into ODU0 to realize cross multiplexing after rate adaptation, synchronously mapped into an OTZ frame through slot time division, and then are converted to be transmitted by OTN. At a receiving terminal, multi-channel low-rate data service can be realized via an OTN deframing process after the OTN frame is received. Therefore, the method supporting multi-service access and output and the system thereof can realize multi-channel access and output of data service with various rates and increase utilization rate and transmission efficiency of wide bands.

Description

technical field [0001] The present invention relates to the access and transmission technology of Optical Transport Network (OTN, Optical Transport Network), in particular to a method and system supporting multi-service access and transmission. Background technique [0002] At present, OTN is a transmission network based on wavelength division multiplexing technology and organized at the optical layer. It is the next-generation backbone transmission network and one of the main forms of information transmission in the telecommunications network. Telecommunication Standardization Bureau (ITU-T) G.709 defines the frame structure and rate of OTN. For example, the bandwidth granularity of OTN electrical domain is Optical Path Data Unit (OPUk), where k=1, 2, 3, in G.709 The specified minimum rate level OPU1 is 2.48832Gbps, and its granularity is relatively large. [0003] The main bearing services of the telecommunication network are data services, such as: Gigabit Ethernet (GE, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00
CPCH04L69/32H04J3/1658H04L29/06068H04L29/08009H04L69/08
Inventor 秦永兵
Owner ZTE CORP
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