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ONU(Optical Network Unit)-transferable TWDM-PON (Time and Wavelength Division Multiplexed Passive Optical Network) system

A TWDM-PON, a specific technology, applied in the system field of the optical communication technology field, can solve the problems of waste of resources, unfavorable utilization of bandwidth resources, etc., and achieve the effect of flexible migration

Inactive Publication Date: 2013-08-14
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in this system, each ONU is allocated on a specific wavelength, which is not conducive to the flexible use of bandwidth resources; and each wavelength is always in a working state even in the case of a small number of ONUs, which leads to resource constraints. waste

Method used

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  • ONU(Optical Network Unit)-transferable TWDM-PON (Time and Wavelength Division Multiplexed Passive Optical Network) system

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0021] refer to Figure 1 to Figure 5 , respectively define the MAC protocol control frame structure in the ONU automatic discovery and migration message interaction process, the MAC protocol control frame structure meets the requirements of the IEEE802.3ah protocol, including:

[0022] figure 1 It is the authorization (GATE) frame structure in the MAC control frame structure part. The role of the authorization frame is to assign sending authorization for all unregistered and registered ONUs. T...

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Abstract

The invention provides an ONU (Optical Network Unit)-transferable TWDM-PON (Time and Wavelength Division Multiplexed Passive Optical Network) system which can realize flexible transfer of online users on different active wavelengths via a specific protocol, and specifically realizes information interaction of an ONU and an OLT (Optical Line Terminal) in the migration process under the existing EPON (Ethernet Passive Optical Network) protocol through redefining some MAC (Media Access Control) protocol frames. The ONU-transferable TWDM-PON system adopts the technical scheme comprising the steps as follows: a, the ONU is registered in the system via the IEEE802.3ah multi-point control protocol, and a unique logical link identifier and a wavelength identifier are distributed for the new registered ONU; and b, the OLT requires the ONU to perform transfer via the specific protocol, and then the ONU exits the registration and performs re-registration according to the requirements of the OLT. According to the invention, under the situation of not influencing service quality for users, flexible transfer of online users on different active wavelengths can be realized via the specific protocol.

Description

technical field [0001] The invention relates to a system in the technical field of optical communication, in particular to a TWDM-PON system in which an ONU can be migrated. Background technique [0002] With the acceleration of triple play process and the rapid development of emerging services in the Internet, more and more home and business users need more and more access network bandwidth; some reports show that by 2015, home users will need at least 250M / S bandwidth. In order to meet this demand trend, many passive optical network (PON, passive optical network) technologies have been proposed to achieve access bandwidth exceeding 10Gb / s, such as wavelength division multiplexing passive optical network (WDM-PON, wavelength division multiplexed passive optical network), optical code division multiplexing passive optical network (OCDMA-PON, optical code division multiplexed passive optical network), orthogonal frequency division multiplexing passive optical network (OFDM-P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/40H04Q11/00
Inventor 杨红阳李军孙卫强胡卫生
Owner SHANGHAI JIAO TONG UNIV
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