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System and method for using wavelength division multiplex passive optical network to realize sharing of downlink wavelength

A passive optical network and wavelength division multiplexing technology, applied in the field of optical communication, can solve the problems of low resource utilization and high average cost of users, and achieve the effect of reducing construction costs

Inactive Publication Date: 2010-06-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reduce the number of optical transmitters and their reserve transmitters in the optical line terminal by the above methods, so as to overcome the problems of low utilization rate of existing wavelength division multiplexing passive optical network resources and high average cost of users

Method used

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  • System and method for using wavelength division multiplex passive optical network to realize sharing of downlink wavelength
  • System and method for using wavelength division multiplex passive optical network to realize sharing of downlink wavelength

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Embodiment 1

[0015] Embodiment 1: A wavelength division multiplexing passive optical network realizes a system for sharing wavelengths in the downlink direction, including three parts: 1 optical line terminal (22), 1 remote node (23) and 32 optical network units (24) (n=32). The optical line terminal (22) consists of 32 fixed receivers (9), 1 first waveguide grating router (8), 1 waveband demultiplexer (7), 32 dynamically adjustable receivers (18), A high-power laser (19), a band multiplexer (5), a central scheduler (10) and a multi-frequency laser (11) are connected to each other. The remote node (23) consists of a band multiplexer (5), a band demultiplexer (7), an arrayed waveguide grating (4), an opto-voltage converter (20), 1 switch drive circuit (21), 1 second waveguide grating router (12), 1 32 * It consists of 32-port optical switches (13) and 32 dual-band demultiplexers (3). The optical network unit (24) consists of 1 light emitting diode (1), 1 coupler (2), 1 optical circulator...

Embodiment 2

[0016] Embodiment two: adopt the above-mentioned system to realize the specific method of network downlink wavelength sharing: when the optical network unit (24) needs to carry out downlink wavelength sharing, the uplink wavelength application information will be loaded by the L-band light-emitting diode (1) therein, different The wavelength application information of the optical network unit is divided into spectrum by the arrayed waveguide grating (4) at the remote node (23), combined into the feed fiber (6) and transmitted to the optical line terminal (22). After the wavelength application signals of each optical network unit (24) are demultiplexed by the first waveguide grating router (8), they are respectively received by the fixed receiver array (9) at the left end of the first waveguide grating router. The central scheduler (10) at the optical line terminal will summarize and analyze the received wavelength application information, and then dynamically control the output o...

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Abstract

The invention relates to a system and a method for using a wavelength division multiplex passive optical network to realize sharing of downlink wavelengths. In the system, an optical line terminal is connected with a remote node, and the remote node is connected with n optical network units, wherein n is a natural number that is greater than 2. A high-power laser, a photovoltaic converter, a switch driving circuit, an optical switch and the like applied in the optical line terminal and the remote node not only realize the sharing of the downlink wavelengths but also keep the advanced characteristics of the passive network. Based on the system, the invention uses an application-dispatching sharing model to realize the wavelength sharing of downlink optical network units. The invention has the characteristics that wavelengths and routes can be reconstructed as required, the utilization ratio of wavelength resources are high, the cost of network creation is low, and the like.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a wavelength division multiplexing passive optical network system and method based on optical voltage conversion and wavelength path reconstruction that can realize downlink wavelength sharing. Background technique [0002] The WDM passive optical network is widely considered by the industry as the evolution direction of the next-generation ultra-broadband access network because of its unique advantages such as good information security and extremely rich bandwidth resources. Today's wavelength division multiplexing passive optical network systems mostly use a static allocation method in which each ONU corresponds to a wavelength. Due to the high cost of a single-wavelength laser, this allocation method will not only lead to an increase in the average cost of users, but also make the wavelength in the system Resource utilization is low. The wavelength-division multiplexing p...

Claims

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Application Information

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IPC IPC(8): H04Q11/00
Inventor 石磊甘朝钦周杨张锋朱龙
Owner SHANGHAI UNIV