Optical fiber access net and its communication protecting method

Abstract

A fiber access network and communication protecting method thereof, the said fiber access network includes: fiber communication system, wireless communication system and communication service switching device. When the fiber between the optical line terminal in the fiber communication system and the optical network unit is broken off, the communication service is switched by the communication service switching device from the fiber communication system to the wireless communication system; after the fiber malfunction has been eliminated, the communication service then is switched back to the fiber communication system by the communication service switching device. The system construction of the invention is simple, a limitation of resources such as pipeline, cable and so on can be overcome by adopting the invention, and the invention also contributes to the utilization of the communication device, thus the communication service of the fiber communication system is effectively ensured.

Description

technical field [0001] The present invention relates to an optical fiber access network and a communication protection method thereof, in particular to an optical fiber access network with a communication protection function capable of providing wireless communication protection when an optical fiber is disconnected and faulty, and when an optical fiber is disconnected and faulty, A communication protection method to ensure that communication services are not affected. Background technique [0002] The use of optical fiber access network is an inevitable trend in the development of optical fiber communication. There are usually five topological structures of optical fiber access network: single star, multi-star, tree, bus and ring. For the first four, they can be collectively referred to as star structure. Compared with the ring network and point-to-point system, the star network can save a lot of optical fibers and optical transceiver modules, and its branch structure is e...

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Problems solved by technology

[0004] 1. Use the same cable splitting method for protection, that is, there are main and backup fibers in the same cable. When the main fiber is cut off, the backup fiber can be used. However, when the entire cable is cut off, this method cannot Ensure the normal operation of communication services

[0005] 2. Use the same route splitting method for protection, that is, on the same pipeline or route, the main and backup optical fibers are in different optical cables, so that when the optical cable where the main optical fiber is located fails, the backup optical fiber can be activated. However, this method It can only protect general optical cable cutting faults, but cannot prevent large-scale faults, such as the accident of cutting optical cable ducts in a large area due to the construction of large machinery

[0007] However, in the existing actual protection applications, due to the limitation of pipelines, optical fiber resources and construction costs, only the above-mentioned protection methods are used to protect the optical fiber lines between the optical line terminal and the optical splitter, and the star type is rarely used. The optical fiber line between the optical splitter and the optical network unit in the network access network is protected. Once the optical fiber is broken, the network communication will be invalid.

[0008] Many tariff-sensitive users and users who need real-time network information exchange do not have strict QOS requirements for the network and can tolerate network performance degradation in a short period of time, such as network speed drops, but they cannot tolerate long-term network degradation. to interrupt

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