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PON system mixing TDMA and WDM having function of local area network

A local area network and functional technology, applied in TDMA and WDM hybrid PON system, GEPON system extension, EPON, supports the communication field between optical network units, can solve the problems such as not being able to meet frequent switching, and achieve improved channel utilization and improved The effect of system bandwidth, fast switching

Active Publication Date: 2008-11-19
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thermo-optical switches or mechanical-optical switches can only work at the μs level, which cannot meet the frequent switching between the two modes in practical situations.

Method used

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  • PON system mixing TDMA and WDM having function of local area network
  • PON system mixing TDMA and WDM having function of local area network
  • PON system mixing TDMA and WDM having function of local area network

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Embodiment Construction

[0020]A kind of TDMA and WDM mixed PON system with local area network function provided by the present invention comprises: optical line terminal OLT, optical coupler and optical network unit ONU, wherein the downlink optical data signal and public antenna TV CATV radio frequency signal pass OLT in the optical fiber Transmission, output to the ONU through the optical coupler, and the uplink single-wavelength data signal is transmitted to the OLT through the ONU and the optical coupler. In the OLT, there are M optical transmission modules that send M different wavelengths, an optical transmission module that supports CATV radio frequency signal transmission, and The optical receiving module for receiving uplink signals, the optical transmitting module and the optical receiving module in the ONU all have wavelength switching functions. The output terminals of M optical sending modules, optical receiving modules and CATV radio frequency signal sending modules of the OLT are connec...

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Abstract

The invention discloses a PON system with the combination of TDMA and WDM and the LAN function. An OLT is connected with N ONU through an optical coupler; the OLT end includes M transmitter modules Tx with different wavelengths, a receiver module Rx with single wavelength and a CATV RF signal transmitter module Tx; each ONU includes a transmitter module and a receiver module with the function of high speed wavelength switching. The PON system adopts the coarse wavelength division multiplexing technique to realize the multi wavelength downstream data transmission; each wavelength is distributed to a plurality of ONU for sharing through the current TDMA technology so that the system bandwidth is extended; the LAN mode is separated from the PON system by the receiver-transmitter module with the wavelength switching function in the ONU end so that the rapid switching between the PON mode and the LAN mode is realized and the problem of low channel utilization rate found in the traditional access mode is solved.

Description

technical field [0001] The invention belongs to the field of optical fiber communication. Specifically, the invention relates to a TDMA and WDM hybrid PON system with local area network functions, which is applicable to the expansion of EPON (Ethernet PON) and GEPON systems, especially supporting optical networks. Communication between units. Background technique [0002] The First Mile Ethernet Alliance (EFMA) proposed the concept of Ethernet-based PON in early 2001, EPON, which uses the topology of PON (Passive Optical Network) to realize Ethernet access. EPON is a broadband access technology that adopts point-to-multipoint network structure, passive optical fiber transmission mode, high-speed Ethernet platform and TDM time division MAC (Media Access Control) media access control mode, and provides multiple comprehensive services. EPON adopts 8B / 10B code pattern, follows the IEEE802.3ah standard, and can support 1.25Gb / s symmetrical rate. With the maturity of IOG Ethernet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04J14/02H04B10/14H04B10/20H04B10/25H04Q11/00
Inventor 简伟王建新余建国
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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