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A method and device for improving reliability of passive optical network

A passive optical network and reliability technology, applied in the field of communication, can solve the problem of ONU not working normally, upstream optical signal collision, etc., to achieve the effect of improving user satisfaction and reliability

Inactive Publication Date: 2012-06-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: when a certain ONU fails in the prior art, such as long light emission or when it cannot be synchronized with the OLT due to loss of lock, the transmission circuit is turned on in the wrong time slot, resulting in the same power PON network The upstream optical signals of other ONUs under the same PON network collide, thus causing other ONUs under the same PON network to fail to work normally, and a method and device for solving this problem are proposed

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  • A method and device for improving reliability of passive optical network
  • A method and device for improving reliability of passive optical network
  • A method and device for improving reliability of passive optical network

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Embodiment Construction

[0019] The implementation of the invention will be introduced below in conjunction with the accompanying drawings.

[0020] Normally, there are two methods for judging whether the ONU is working normally, one is judging from the perspective of receiving, and the other is judging from the perspective of sending. The following uses GPON as an example to illustrate the working principle of the present invention.

[0021] image 3 It is the general circuit frame diagram of the ONU side of the GPON system. From the perspective of reception, when the ONU is working normally, the SerDes is stably locked on the downlink (from OLT to ONU) input signal. At this time, the clock lock signal CDR_LOCK of the SerDes shows lock . Under abnormal circumstances, when the ONU cannot enter the locked state, it means that the ONU cannot work normally. When the CDR_LOCK is detected to be abnormal, the transmission of the optical module should be turned off in time to avoid disturbing the normal ope...

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Abstract

The invention discloses a method and a device for improving reliability of passive optical networks. The device is additionally provided with a logic device based on the existing optical network units (ONU), and controls whether an optical module in the ONU is to be started or not by judging whether CDR-LOCK signals and TX-EN signals process overtime. The method and the device of the invention improve the reliability of the PON networks, thus improving user satisfaction of the PON networks. The method and the device of the invention are suitable for PON networks of all powers, including GPON,EPON and BPON.

Description

technical field [0001] The present invention relates to the communication technology using the Time Division Multiple Access (TDMA) working mode in the field of communication, in particular to the passive optical network (Passive Optical Network, PON) communication technology for power distribution. Background technique [0002] In the power PON system, from the Optical Network Unit (Optical Network Unit, ONU) to the Optical Line Terminal (Optical Line Terminal, OLT), that is, the upstream direction adopts the TDMA mechanism. Time division multiplexing shares an uplink physical channel for data transmission. Such as figure 2 As shown, in the normal working mode, the optical network terminal (Optical Network Terminal, ONT) only turns on the optical module in the time slot allocated to it by the OLT, uploads data to the OLT, and the OLT allocates corresponding The time slot ensures that only one ONU can emit light at the same time, so as not to cause conflicts, but such a sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/08H04J3/06H04B10/03H04B10/07
Inventor 李明生贝劲松王静璇
Owner ZTE CORP