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

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...

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 transmission platform), PTN (Packet Transport Radio Access Network, IP wireless access network) and other technologies have high costs and cannot meet the low-cost requirements of ordinary user access

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