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TDM business realizing method based on Ethernet passive light network

A technology of passive optical network and implementation method, which is applied in the field of TDM service implementation based on Ethernet passive optical network, can solve the problems of high cost, unsatisfactory clock recovery accuracy, difficult implementation, etc. Effect

Active Publication Date: 2010-05-12
广州市高科通信技术股份有限公司
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Problems solved by technology

The implementation of this method is difficult, the cost is high, and the accuracy of the recovered clock is not satisfactory. In actual use, the provider of the IP service needs to guarantee the QoS of the TDM service data packet.

Method used

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  • TDM business realizing method based on Ethernet passive light network
  • TDM business realizing method based on Ethernet passive light network
  • TDM business realizing method based on Ethernet passive light network

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Principle block diagram of the present invention is attached figure 1 shown. Mainly set code rate adjustment / de-adjustment, multiplexing / demultiplexing and data encapsulation / unencapsulation modules in OLT and ONU. The working process of these modules adopts the clock source stipulated in the IEEE802.3ah agreement.

[0034] The present invention includes a sending process and a receiving process of TDM service data;

[0035] During the sending process, the optical line terminal and the optical network unit both adjust the code rate of the TDM service data before sending the TDM service data, and then multiplex the adjusted two channels of data into one channel, and the multiplexed data adopts the Ethernet frame format for data encapsulation;

[0036] In the receiving process, the data is first decapsulated, and then the demultiplexed data is demultiplexed, a...

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Abstract

A method for realizing TDM service based on Ethernet passive optical network includes carrying out code rate regulation on TDM service data by both optical line terminal and optical network unit thenmultiplexing two paths of regulated data to be one path and using Ethernet frame format to package multiplexed data in sending process, forming original TDM service data by depackaging and demultiplexing as well as deregulating in receiving process, utilizing system clock of passive optical network to synchronize clock at said terminal and said unit in both said receiving and sending processes.

Description

technical field [0001] The invention belongs to the access technology based on the Ethernet passive optical network EPON, and specifically relates to a method for adapting TDM services to the Ethernet. technical background [0002] The EPON system based on the Gigabit Ethernet passive optical network has realized low-cost, long-distance high-speed access, and is considered to be a new trend of broadband access. The EPON system can efficiently realize the access of Ethernet-based data services and voice services, but it is difficult to implement traditional TDM services on the EPON system. At present, the industry generally adopts the method of circuit simulation to restore the timing clock signal. This method encapsulates the TDM service data and clock information into IP data packets, and recovers the service data and clock signals from the IP data packets when receiving. The implementation of this method is difficult, the cost is high, and the accuracy of the recovered cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/00H04L12/28H04Q11/00H04Q11/04H04B10/25
Inventor 张贤德周昭荣
Owner 广州市高科通信技术股份有限公司
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