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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

Active Publication Date: 2007-05-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the above-mentioned problem of high cost caused by the construction of distribution nodes, the present invention provides a protection method and device for a WDM transmission system, which reduces the cost of comprehensive network construction by making the distribution nodes passive

Method used

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  • WDM transmission system protection method and apparatus
  • WDM transmission system protection method and apparatus
  • WDM transmission system protection method and apparatus

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Embodiment Construction

[0031] The core idea of ​​the present invention is: for a specific scenario of the access network, an asymmetric protection implementation scheme is adopted, the downlink path adopts the scheme of selective transmission at the sending end and double reception at the receiving end, and the scheme of double transmission at the sending end and selective reception at the receiving end is adopted for the uplink path. In this way, the transmission and reception on the central node side adopts the selection mode, and the distribution nodes near the user side adopt the permanent connection mode, so that the distribution node realized in this way does not have a selection switch, so it can be realized by passive devices without power supply, thus There is no need to use ancillary equipment such as air conditioners to ensure the ambient temperature and humidity of the device and equipment, thereby achieving the purpose of reducing costs.

[0032] The present invention will be further des...

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PUM

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04J14/02
CPCH04J14/0297H04J14/0294H04J14/0227H04J14/0295H04J14/0283H04J14/0282H04J14/0246H04J14/025
Inventor 李汉国陈铭洪斌
Owner HUAWEI TECH CO LTD
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