Novel wide-area coverage hybrid wavelength-time division multiplexing passive optical network system

A technology of passive optical network and time division multiplexing, which is applied in the direction of wavelength division multiplexing system, selection device of multiplexing system, electrical components, etc. Small area and other issues, to achieve the effect of low operation and maintenance costs, overcome their own defects, and simple network structure
CN102665152AActive Publication Date: 2012-09-12WUHAN POST & TELECOMM RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN POST & TELECOMM RES INST CO LTD
Publication Date
2012-09-12

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Abstract

The invention relates to a novel wide-area coverage hybrid wavelength-time division multiplexing passive optical network system. A two-fiber bidirectional transmission mode is adopted for a system link. A central office wavelength division multiplexer / demultiplexer combines and splits uplink and downlink optical wavelengths respectively, so that the wavelength crosstalk of bidirectional data communication is avoided; a reconfigurable optical add-drop multiplexer inserted into a trunk fiber downloads and uploads signals of a time division multiplexing-passive optical network (TDM-PON) branch with any wavelength according to networking requirements; an all-optical wavelength converter transparently transmits a downlink optical signal which is downloaded by the reconfigurable optical add-drop multiplexer, and converts uplink data wavelength lambdaup signals which are transmitted by each optical network unit (ONU) in a unified way into uplink optical signals with optical wavelengths which are the same as the downlink optical wavelength lambdan of the branch; and an optical power splitter is connected with a plurality of ONUs in a hooking way to realize the service access of a user. The system is high in capacity, long in access distance, wide in coverage area, low in operation and maintenance cost and simple in network structure, a conflict between the bandwidth and cost of an access network is completely eliminated, and the advantages of various conventional PON technologies are reserved.
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Description

technical field

[0001] The invention relates to the technical field of optical access networks, in particular to a novel wide-area coverage hybrid wavelength division time division multiplexing passive optical network system. In particular, it refers to a new wide-area coverage hybrid wavelength division time division multiplexing passive optical network system based on reconfigurable optical add-drop multiplexers and all-optical wavelength converters. Background technique

[0002] Against the background of the general trend of triple play integration, the Passive Optical Network (PON) technology, which has the advantages of large capacity, full service, low cost, high reliability, and easy maintenance, has been adopted by major fixed network operators and equipment The manufacturer considers it the best solution for fiber-to-the-home (FTTH) access. At present, TDM-PON (EPON / GPON) and WDM-PON optical access networks have been successfully commercialized on a large scale aro...

Claims

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