Method and device for detecting up transmitting error and protecting passive light network terminal

A passive optical network and transmission error technology, which is applied in the field of communication, can solve problems such as uplink channel congestion, unresolved, and interference with uplink optical signals, and achieve the effect of improving security and enhancing robustness

Inactive Publication Date: 2007-07-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, it will seriously interfere with the upstream optical signals emitted by other ONTs or ONUs, causing the OLT to be unable to parse the data uploaded by other ONTs or ONUs
As a result, the uplink channel of the entire system is blocked
[0007] In the prior art, there is no solution to the above problems

Method used

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  • Method and device for detecting up transmitting error and protecting passive light network terminal
  • Method and device for detecting up transmitting error and protecting passive light network terminal
  • Method and device for detecting up transmitting error and protecting passive light network terminal

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Embodiment Construction

[0041] The present invention provides a method and device for detecting uplink transmission errors and protecting PON terminals. The core of the present invention is: the terminal obtains a prohibition window for prohibiting itself from sending signals upwards according to the time slot allocation message sent by the OLT, and the terminal is within the prohibition window The internal synchronization detects the optical signal sent upward by its own optical module, and if it finds that there is an optical signal sent within the forbidden window, it determines that the uplink transmission is chaotic, and stops sending the optical signal upward.

[0042] Describe the present invention in detail below in conjunction with accompanying drawing, the structure of the specific implementation mode of the device described in this method is as shown in Figure 5, and this device can be PON terminal, wherein comprises ONT or ONU, comprises following module:

[0043] Optical module: used to r...

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Abstract

The method includes following main steps: obtaining up going time slot assigned to the terminal from time slot assignment message sent to terminal in passive optical network (PON) from office equipment (OLT); detecting optical signal up sent by the terminal; when detected that the terminal sends optical signal outside the up going time slot, the method stops the terminal to send optical signal. The said terminals in the invention include optical feedback module and optical detection control module mainly. When PON terminals send signal not according to pointed time slit, the disclosed method takes measures to recover up going communication of PON in time so as to enhance robustness of PON.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a device for detecting an uplink transmission error and protecting a PON (passive optical network) terminal. Background technique [0002] Optical fiber has the advantages of wide transmission frequency, large capacity, low loss and strong anti-interference ability, and is very suitable as a transmission medium for high-speed and broadband services. Among various optical access technologies, PON (Passive Optical Network), as a very promising optical access technology now and in the future, is attracting more and more attention. [0003] PON consists of an OLT (office equipment), an optical splitter, multiple remote terminal equipment and multiple optical fibers, as shown in Figure 1. The OLT is located at the end of the operator's network. It is connected upwards to the network and downwards to the optical splitter. An optical fiber is connected between the central office ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04J3/14H04Q11/00H04B10/032
Inventor 王峰王运涛江涛黄伟陈珺林华枫卫国赵峻谭培龙
Owner HUAWEI TECH CO LTD
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