WDM transmission system protection method and apparatus

A transmission system and business technology, applied in the field of communication transmission, can solve the problem of high cost and achieve the effect of reducing the cost of network construction
CN1968141AActive Publication Date: 2007-05-23HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2007-05-23

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Abstract

The invention relates to a WDM (wavelength division multiplex) transmission system applied in local network access network, and relative device, wherein the light modulation method comprises that: 1, terminal node checks condition of descending service; 2, when the descending service has accidence, the terminal node marks the accident descending path and generates descending path accidence information; 3, transmitting the accident information to the central node via ascending path; 4, central node switches descending service from work path into protective path. The invention inactivates the distributing node to reduce network cost.
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Description

technical field

[0001] The invention relates to the field of communication transmission, in particular to a method and device for realizing a WDM (wavelength division multiplex) transmission system in a metro access network. Background technique

[0002] In the metropolitan access network, the most widely used optical fiber access method is PON (Passive Optical Network Passive Optical Network), but the highest rate that optical fiber can provide is only 1.25Gbps or 2.5Gbps, and the actual single user The computer usually uses a network card of 100Mbps, and the access bandwidth is only about 2M, which cannot meet the rapidly growing needs of customers. Therefore, higher bandwidth is required to provide optical fiber access. WDM technology has been commercialized on a large scale in backbone networks and metropolitan area networks, and its bandwidth can be upgraded and expanded with increasing wavelengths as demand continues. With the continuous and rapid growth of access ba...

Claims

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