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Multiplex transmission system and multiplex transmission method

一种传输系统、传输帧的技术，应用在光传输系统领域，能够解决波长资源利用率降低等问题

Active Publication Date: 2009-08-12
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even a 43.0Gbit / s OTN signal can only accommodate three 10GbE-LAN-PHY signals
[0016] Therefore, the utilization rate of the wavelength resources of the operator network is reduced

Method used

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  • Multiplex transmission system and multiplex transmission method
  • Multiplex transmission system and multiplex transmission method
  • Multiplex transmission system and multiplex transmission method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0072] figure 2 The first embodiment of the present invention is shown. figure 2 The optical transmission system shown has a sending system and a receiving system. They are connected by an optical transport network. Each of the transmission system and the reception system may be constituted by one device, or may be constituted by a plurality of devices. This also applies to other embodiments.

[0073] Such as figure 2 As shown, the transmitting system and the receiving system each have a system for accommodating client signals without multiplexing and transmitting them as optical signals (upper side in the figure) and a system for accommodating and multiplexing client signals and transmitting them as optical signals ( lower side of the figure).

[0074] When performing multiplexing, the rate adjustment unit 3 performs rate adjustment on a plurality of client signals whose bit rates are not integer multiples of each other so that the bit rates become integer multiples o...

no. 2 approach

[0079] image 3 A second embodiment of the present invention is shown. image 3 An example of a system in which eight 1GbE signals and three 10GbE signals are multiplexed and transmitted as client signals is shown. On the sending side, the 1GbE signal of the client signal first passes through the 64B / 66B encoding section 11 to encode the bit rate into 66 / 64 (for example: 64B / 66B encoding), the bit rate is adjusted, and the OH adding section 12 is used for management. Signal additional management of rate adjustment with OH.

[0080] The 1.25 Gbit / s 1GbE signal becomes 1.25×66 / 64 Gbit / s by encoding in the 64B / 66B encoding unit 11 , and the bit rate becomes 1 / 8 of the 10.3125 Gbit / s 10GbE signal. The bit rate becomes an integer fraction of the 10GbE signal, making it easy to perform time-division multiplexing.

[0081] The encoded 1GbE signal to which the OH for management is added is multiplexed 8 times by the multiplexing processing unit 13 , and the OH for management of the m...

no. 3 approach

[0096] Figure 6 A third embodiment is shown. Here, a system configuration example in which rate adjustment is performed only when multiplexing is performed is shown. By performing rate adjustment by the rate adjustment unit 27 only when multiplexing is performed, and not performing rate adjustment when not multiplexing, the transmission bit rate when not performing multiplexing can be kept low. Accordingly, the operating speed required for the device hardware can be eased, and the margin for transmission characteristics can be increased. The reception side includes a rate reduction unit 28 that restores the rate of the separated signal. in addition, Figure 6 It shows a structure in which the rate adjustment is performed after the management OH is added.

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Abstract

Provided is a multiplex transmission system which adds a managing overhead to a client signal and multiplexes or contains the client signal in a transparent for transmission. The multiplex transmission system contains a plurality of client signals having different bit rates including client signals other than a signal having a bit rate multiplied or divided by an integer and adjusts some or all of the client signals so that the their bit rates are equal to the other client signals which are multiplied or divided by integers.

Description

technical field [0001] The invention relates to an optical transmission system, which transparently accommodates, multiplexes and transmits a plurality of client signals including signals whose bit rates are different from each other and whose bit rates are not integer multiples or integer fractions of each other. Background technique [0002] In an optical transmission system, Synchronous Digital Hierarchy (SDH, Synchronous Digital Hierarchy) is internationally standardized as an existing digital hierarchy for multiplexing service signals. In the United States, Synchronous Optical Network (SONET, Synchronous Optical Network), which is the same as SDH, has become a standard. [0003] Among the current optical transmission systems, the optical transmission system conforming to the SONET / SDH standard has become the mainstream, and has been widely adopted in the world so far. In recent years, not only SDH / SONET, but also ATM, Ethernet (registered trademark), etc. have been use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/00H04J3/22H04J14/08H04L12/28
CPCH04J3/1664H04J3/07H04L25/14
Inventor 木坂由明相泽茂树高桥哲夫大原拓也古贺正文富沢将人宫本裕
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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