Convergence type metropolitan area wavelength division access network system and accessing method

A technology of access network and access method, which is applied in the convergent metropolitan area WDM access network system and access field, and can solve the problems of high technical cost and inability to meet the low-cost requirements of ordinary users, etc.

Active Publication Date: 2013-09-04
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for PON technologies to meet the high-quality requirements of mobile backhaul and private lines for VIP customers. MSTP (Multi-Service Transmission Platform, multi-service tr

Method used

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  • Convergence type metropolitan area wavelength division access network system and accessing method
  • Convergence type metropolitan area wavelength division access network system and accessing method
  • Convergence type metropolitan area wavelength division access network system and accessing method

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] see figure 1 As shown, the embodiment of the present invention provides a converged metropolitan WDM access network system, including an OLT (Optical Line Terminal, Optical Line Terminal) located in a CO (Central Office, Central Office), m ROADM (Reconfigurable Optical Add -Drop Multiplexer, reconfigurable optical add-drop multiplexer) node and n remote OTUs (Optical Transport Unit, Optical Transport Unit), m and n are both positive integers, m≥1, n≥m, n remote The wavelengths corresponding to the end OTUs are λ1, ..., λn, and the central computer room is used as the network convergence point. The central computer room OLT and m ROADM nodes are connected sequentially through optical fibers to form a ring topology. The m ROADMs in the ring topology Nodes are numbered clockwise as ROADM1, ROADM2, ..., ROADM m-1, ROADM m. East an...

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Abstract

The invention discloses a convergence type metropolitan area wavelength division access network system and an accessing method, and relates to the field of metropolitan area access. The system comprises an OLT located in a central apparatus room, m ROADM nodes and n far-end OTUs, wherein m and n belong to positive integers, m is larger than or equal to 1, and n is larger than or equal to m. The central apparatus room is a network convergence point, the OLT of the central apparatus room and the m ROADM nodes are sequentially connected through optical fibers to form an annular topological structure, the connecting direction of the m ROADM nodes in an annular topology is expressed in the eastward direction and the westward direction, on the basis of the clockwise direction, the eastward direction of a prior ROADM node is connected with the westward direction of a next ROADM node, only one optical fiber exists between every two adjacent ROADM nodes, and each ROADM node is connected with at least one far-end OTU. All services of a service provider can be accessed through one network, the robustness requirements such as mobile backhaul and a special line for a big customer are met, management is convenient, cost is low, bandwidth is allocated flexibly, capacity is large, and the accessing distance is long.

Description

technical field [0001] The invention relates to the field of metropolitan access, in particular to a convergent metropolitan wavelength division access network system and an access method. Background technique [0002] With the continuous development of technologies and services such as the Internet, Internet of Things, cloud computing, and triple play integration, the demand for user access bandwidth has increased significantly. China proposes that by 2015, the user access bandwidth in developed cities will reach 100Mb / s (megabits per second). Under the premise of low cost, large capacity and large bandwidth have become the development goals of PON (Passive Optical Network, Passive Optical Network) technology, EPON (Ethernet Passive Optical Network, Ethernet Passive Optical Network), GPON (Gigabit-Capable PON , Gbit Ethernet Passive Optical Network) has been commercialized on a large scale around the world, 10G EPON / GPON is gradually entering the market, and standardizatio...

Claims

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Application Information

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IPC IPC(8): H04J14/02H04L12/24
Inventor 张新全程容杨铸何炜刘武
Owner WUHAN POST & TELECOMM RES INST CO LTD
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