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Optical network unit of Ethernet passive optical network

A passive optical network and optical network unit technology, applied in the field of optical transmission equipment, can solve problems such as IPTV wide bandwidth and network channel congestion, and achieve the effects of increasing reliability, reducing volume, and facilitating connection

Inactive Publication Date: 2007-11-21
SHANGHAI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the EPON system, VoIP and IPTV can be used to solve the problem of the integration of the three networks. Due to the narrow bandwidth of IP voice, the bandwidth of EPON is enough to ensure a good call quality, but the bandwidth occupied by IPTV is relatively wide, and it is used by a large number of users at the same time. When ordering different channels, it will cause congestion of the entire network channel

Method used

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  • Optical network unit of Ethernet passive optical network
  • Optical network unit of Ethernet passive optical network
  • Optical network unit of Ethernet passive optical network

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Embodiment Construction

[0023] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0024] The overall block diagram of the EPON optical network unit ONU used for triple play is shown in Figure 2.

[0025] The downlink 1490nm EPON data and 1550nm CATV optical signal sent by the OLT through the ODN optical path enter the EPON optical interface module 5, and after photoelectric conversion, the output 1.25Gb / s PECL baseband data signal enters the EPON ONU MAC data processing module 7, and the MAC data processing module is in the The Ethernet frame recovered from the downlink data enters the Ethernet interfaces 9 and 10 through the media independent interface MII or the gigabit media independent interface GMII, and becomes a standard 10 / 100 / 1000M Ethernet interface signal and then sent to the network equipment connected to the ONU. The 10 / 100 / 1000M Ethernet interface electrical or optical signal sent by the network equipment becomes...

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Abstract

The optical network unit thereof has CATV-signal outputting function while realizing the transmission of Ethernet data transmission so as to realizing the transmission of TV signal in EPON, and can be used in realizing EPON-based three-network integration. The invention uses an optical module integrated with three wave lengths and an ONU MAC process chip so as to improve the reliability of ONU and to reduce the cost, and is equipped with mega bytes and giga bytes Ethernet I / O interfaces so as to improve the adaptability of ONU.

Description

technical field [0001] The invention relates to optical transmission equipment, in particular to an optical network unit (ONU) of an Ethernet passive optical network (EPON), which has a CATV signal output function while realizing Ethernet data transmission, and solves the transmission problem of TV signals in EPON , used to realize EPON-based triple play. Background technique [0002] In today's world, a movement called "Fiber to the Building (FTTB)", "Fiber to the Office (FTTO)", "Fiber to the Home (FTTH)", or collectively "Fiber to the Premises (FTTP)" is emerging. The main network technology of FTTP is Ethernet Passive Optical Network (EPON) or Gigabit Passive Optical Network (GPON). As a substitute for existing broadband access network technologies - FTTC+xDSL, HFC+Cable Modem, and FTTB+LAN, the maturity of FTTP technology is setting off a new generation of broadband access network revolution, and it is clearly based on TV, data and telephone Network integration (Tripl...

Claims

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Application Information

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IPC IPC(8): H04B10/14H04L12/28H04Q11/00
Inventor 宋英雄李迎春陈健姚炜苏皆磊
Owner SHANGHAI UNIV
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