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Optical line terminal

An optical line terminal and optical signal technology, which is applied in the field of optical communication, can solve the problems of increasing the difficulty of GPONOLT module design, etc., and achieve the effects of simplifying maintenance work, high-sensitivity reception, and improving reliability

Active Publication Date: 2012-04-11
HISENSE BROADBAND MULTIMEDIA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively strict standards formulated by the GPON protocol, and at the end of 2008, mainstream telecom operators proposed that the GPON OLT module must add a digital received signal strength indicator (RSSI) function, which greatly increases the design difficulty of the GPON OLT module

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] In order to realize the receiving and diagnosing function of the optical signal in the uplink burst mode, the optical line terminal of the present invention needs to support the monitoring of the received optical power of the burst mode within a certain period of time (that is, within the shortest working packet length of the optical input signal). The technical difficulties encountered in the process mainly lie in the following two aspects:

[0035] 1. Realize high-sensitivity reception of optical input signals in uplink burst mode;

[0036] 2. Accurately monitor the average optical power of each burst signal packet in the uplink burst mode.

[0037] For high-sensitivity reception of optical signals in burst mode: Since the optical line terminal (GPON OLT) based on the GPON system requires a burst receiving rate o...

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Abstract

The invention discloses an optical line terminal, which comprises an optical receiving component and a processor, wherein the optical receiving module generates response current according to a received optical signal; the response current is processed by a current mirror image device and then is transmitted to a current-voltage converting circuit; a current signal is converted into a voltage signal by the converting circuit and is transmitted to a switch circuit; the switch circuit is conducted when receiving an effective triggering control signal on a control terminal; the voltage signal output by the current-voltage converting circuit is transmitted to an energy storage circuit to carry out sampling and holding so as to connect the processer; and the average optical power of the received optical signal is monitored by the processer. The optical line terminal realizes accurate calculation and monitoring of the average receiving optical power by carrying out sampling and holding to the received optical signal, is particularly suitable for monitoring and precisely measuring the average optical power of each burst signal package in the uplink burst mode, and makes the optical line terminal have the burst monitoring function.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an optical line terminal capable of supporting digital burst receiving and diagnosing functions. Background technique [0002] In recent years, people's requirements for high bandwidth have become more obvious, and various value-added services have continued to develop, such as video conferencing, high-definition video, real-time games, IPTV and other applications, and people's demand for high bandwidth has also been continuously promoted. [0003] Generally speaking, the modern communication network can be divided into: the core network and the access network, and the access network is vividly called "the last mile". As far as the current market is concerned, among many solutions, the emergence of fiber-to-the-home (FTTH) is considered to be the ultimate solution for the "last mile" of broadband access. Among the many solutions of FTTH, the passive opt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/02H04B10/14H04B10/08H04B10/079H04B10/69
CPCH04B10/69H04B10/07955
Inventor 张华吴锡贵
Owner HISENSE BROADBAND MULTIMEDIA TECH
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