ODN (Optical Distribution Network) system with capacity expansion adaptability, line protection function and annular feeder line structure

Abstract

The invention discloses an ODN (Optical Distribution Network) system with capacity expansion adaptability, a line protection function and an annular feeder line structure. The ODN system is characterized by being partitioned into a framework feeder line network, a feeder line part and a wiring access part, wherein the framework feeder line network has an annular structure; total double-optical-fiber path protection is adopted for the feeder line part; and partial or total double-path protection is adopted for the wiring access part. In a switched protection scheme of an ODN, protections of the feeder line part and the wiring part are realized separately, and feeder line switched protection has the advantages of concentrated local end control and remote passive configuration, so that the increase in the cost of the ODN network caused by the realization of switched protection is greatly reduced; and moreover, the switched protection of the wiring part can be flexibly configured according to a user level and requirements based on the passive configuration structure of a remote node, and is mainly controlled by a user terminal.

Description

technical field [0001] The invention relates to a ring feeder structure ODN network system, belonging to the field of optical fiber communication, in particular to a ring feeder structure ODN network system with capacity expansion adaptability and line protection function, which can be used for ODN construction with path protection function in FTTX promotion. Background technique [0002] Optical distribution network (ODN) is the basic network architecture in broadband optical access (FTTX) technology. Due to the wide range of users and technology updates, FTTX has great differences in personality and is still in continuous development. FSAN organization will The research on NG-PON is divided into two parts: NGA1 and NGA2. Among them, the research direction of NGA1 is mainly to formulate next-generation PON technology standards that are compatible with current GPON and can share the same ODN. It can be seen that the construction of network infrastructure such as ODN must no...

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Problems solved by technology

[0005] However, for the special point-to-multipoint tree-type branch fiber path structure of the PON network, the method of double-ended optical switch switching greatly increases the complexity of network auxiliary equipment, and also increases the cost of equipment operation and maintenance; In these aspects, the existing technical standards and patented methods cannot give people a satisfactory answer. The industry needs a more adaptable technical solution for optical fiber path protection in the ODN of PON, as well as a variety of protection methods to adapt to Reliability requirements for different types of users

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