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Optical network terminal of asynchronous transmission mode passive optical access network system

A technology of passive optical access network and asynchronous transmission mode, which is applied in the direction of transmission system, electrical components, etc., can solve the problems such as the inability to provide fiber-to-the-home requirements, and achieve the effects of realizing ONT performance, facilitating upgrades, and simplifying system design

Inactive Publication Date: 2006-01-25
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0003] Chinese patent 01106561 (publication number CN1308434A) discloses an asynchronous transfer mode passive optical network system. The optical network user terminal equipment in the system has the following disadvantages: it is an optical network unit, not a user terminal equipment, and cannot To provide fiber-to-the-home (FTTH) requirements, it is necessary to provide users with various business services through other means

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  • Optical network terminal of asynchronous transmission mode passive optical access network system
  • Optical network terminal of asynchronous transmission mode passive optical access network system
  • Optical network terminal of asynchronous transmission mode passive optical access network system

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Embodiment Construction

[0012] combine figure 1 , the composition block diagram of ONT of the present invention, it is made up of photoelectricity / electro-optic conversion module, clock recovery module, transmission convergence layer module, Utopia interface module, channel layer module, adaptation layer and high-level general software platform module.

[0013] combine figure 2 , is a schematic diagram of the physical layer circuit system structure. It is mainly composed of optical modules, clock recovery chips, and FPGA chips. Among them, the optical module completes the photoelectric / electro-optical conversion function of the physical media sublayer function, the clock recovery chip completes the bit synchronization function, and the FPGA chip completes the TC layer function. At the same time, the physical layer circuit board also has a power supply module to provide power for the system; a circuit status display and drive module to display the status of the system; FPGA configuration PROM module...

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Abstract

An optical network terminal in passive optical switching in net system of asynchronous transmission mode consists of photoelectric / electro-optical converting module , clock recovery module , transmission collection layer module , Utopia interface module , ATM layer module , universal software platform module of adaptive and application layers in sequence at uplink direction of signal stream as well as universal software platform of adaptive and application layers , ATM layer module , Utopia interface module , transmission collection layer module and photoelectric / electro optical converting module in sequence at downlink direction of signal stream .

Description

A technical field [0001] The invention relates to an optical network user end equipment (ONT) in an asynchronous transfer mode passive optical network (ATM-PON) system, in particular to an optical network terminal of an asynchronous transfer mode passive optical access network system. Two background technology [0002] In today's information age, people's demand for information is becoming more and more urgent, and the forms of demand are becoming more and more diverse. Facing the GHz bandwidth of the telecom backbone network, the development of the access network at the edge of the telecom network has been very slow, with backward technology and narrow bandwidth. Therefore, the development of the access network is imminent. The Asynchronous Transfer Mode-based Passive Optical Network (APON) combines the multi-service multi-bit rate support capability of ATM and the transparent broadband transmission capability of PON, and becomes an ideal fiber access solution in the 21st ...

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Application Information

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IPC IPC(8): H04L29/12
Inventor 迟泽英陈文建李武森董大圣苏林杨浩季晓飞贺辉
Owner NANJING UNIV OF SCI & TECH
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