Coexistence system of existing passive optical network and next generation passive optical network and updating method

A passive optical network, next-generation technology, applied in transmission systems, electromagnetic wave transmission systems, selection devices for multiplexing systems, etc., can solve the problems of increasing technical difficulty, production costs, sacrificing bandwidth, etc., and achieve low upgrade costs. , the effect of strong operability

Active Publication Date: 2010-11-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although time-division multiplexing can also be used to share the optical distribution network, it sacrifices bandwidth and requires synchronization between two-rate passive optical networks, which increases technical difficulty and production costs.

Method used

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  • Coexistence system of existing passive optical network and next generation passive optical network and updating method
  • Coexistence system of existing passive optical network and next generation passive optical network and updating method
  • Coexistence system of existing passive optical network and next generation passive optical network and updating method

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no. 1 example

[0054] Fig. 1 (a) has shown the structure of present embodiment GEPON and 10GGPON coexistence system, and this coexistence system comprises wavelength division multiplexer (Wave Division Multiplexer, WDM), and the optical line terminal (Optical Line Terminal) (Optical Line Terminal) of this WDM and at least one GEPON , OLT) and at least one 10GGPON optical line terminal connection, and connected to at least one optical distribution network (optical distribution network, ODN) through the trunk fiber (referring to the fiber between WDM and optical distribution network), for the downlink of GEPON and 10GGPON Optical signal multiplexing and demultiplexing of GEPON and 10GGPON upstream optical signals. The optical splitter (splitter) (there may be one or more) in the optical distribution network is connected with one or more GEPON optical network units (Optical Network Unit, ONU) after the narrowed operating bandwidth of the upstream optical signal, and the optical splitter It is a...

no. 2 example

[0067] Figure 2(a) shows the structure of the coexistence system of GEPON and 10GGPON in this embodiment, the coexistence system includes wavelength division multiplexing for multiplexing GEPON and 10GGPON downlink optical signals and demultiplexing GEPON and 10GGPON uplink optical signals The WDM is connected with at least one GEPON optical line terminal and at least one 10GGPON optical line terminal, and is connected to at least one optical distribution network through a trunk fiber.

[0068]Different from the first embodiment, in this embodiment, in addition to adding smooth upgrade wavelength division multiplexers, 10GGPON optical line terminals and 10GGPON optical network units and connecting them as shown in Figure 2 (a), there is no need to The operating bandwidth of the upstream optical signal of the GEPON optical network unit is narrowed, but after the existing optical splitter of the optical distribution network, one or more wavelength converters (wavelength converter...

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Abstract

The invention discloses a coexistence system of the existing passive optical network and the next generation passive optical network and a smooth updating method. The operation bandwidth of the uplink optical signal defined by the existing passive optical network and the next generation passive optical network is overlapped. The coexistence system comprises a backbone fiber, a light distribution network, a first optical line terminal and a first optical network unit of the existing passive optical network, a second optical line terminal and a second network unit of the next generation passive optical network and a wavelength division multiplexer which is connected with the backbone fiber, the first optical line terminal and the second optical line terminal; the second optical network unit is connected with the light distribution network; the light distribution network and / or the first optical network unit narrows the operation bandwidth of the uplink optical signal of the existing passive optical network to the range which is not overlapped with the operation bandwidth of the uplink optical signal of the next generation passive optical network. The invention can avoid the bandwidth conflict of two passive optical networks and fully utilizes the bandwidth.

Description

technical field [0001] The invention relates to the field of optical access network communication, in particular to a coexistence system and smooth upgrade method of an existing passive optical network and a next-generation passive optical network. Background technique [0002] Current optical access network technologies are all based on time division multiplexing passive optical network technology (Time-Division-Multiplexing Passive Optical Network, TDM-PON). There are mainly two types of Ethernet Passive Optical Network (EPON) and Gigabit-Capable Passive Optical Network (GPON). Among them, the existing EPON mainly refers to Gigabit Ethernet wireless Source Optical Network (Gigabit Ethernet Passive Optical Network, GEPON). However, with the continuous improvement of people's bandwidth requirements, and the requirements for multi-network merging and multi-service bearer, the existing GEPON and GPON can no longer meet these requirements, so the existing optical access networ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04B10/20
Inventor 苏婕朱松林何子安耿丹
Owner ZTE CORP
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