Optical network protection method, optical link switching control device and optical link switching control system

Abstract

The invention provides an optical network protection method, an optical link switching control device and an optical link switching control system. Multiple optical communication ports are adopted for backups, and simultaneously the system can further provide a multiple-link switching function of optical links. When the system has an optical communication port failure or a line failure, the system selects an appropriate working optical communication port to be connected with a relevant optical link according to relevant information so as to ensure normal communication. In addition, compared with the prior art, a networking mode of multiple masters + multiple standbys + multiple optical links is adopted. When any one group of optical links fails, the system can still provide communication guarantee through an optical link loopback function, thereby greatly improving the protection capability of an optical network system and saving the networking cost. Furthermore, for update and modification of later-stage communication devices, the system can still effectively provide protection, thereby facilitating development of an optical network technology.

Description

Technical field [0001] The invention relates to the field of optical communication technology, in particular to a protection method, optical link switching control equipment and system related to an optical network. Background technique [0002] Optical network is one of the most common networking methods currently used in communication. Because optical fiber has the advantages of bandwidth, large capacity, low loss, and strong anti-interference ability, it has become an indispensable means for communication networks. [0003] However, in the protection of optical networks in the past, protection schemes with more optical communication ports were generally not considered. The current OLT equipment has been able to have 64 PON ports or more. However, the optical distribution network (Optical Distributing Network, ODN) The network structure has exceeded the complexity of the original optical communication network; and the protection of the general optical network has not been conside...

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Problems solved by technology

[0004] Chinese patent publication number CN102064885 proposes a "method and device for fast protection switching of PON ports in any slot in 10G-EPON system". This method can only achieve this purpose under the condition of 1:1 redundancy of optical communication ports. In the project, it is difficult to achieve 1:1 redundancy protection for all optical communication ports, and only one port for each port is correspondingly protected. If the protection port fails, the remaining redundant ports cannot protect the communication optical port. protect

[0005] Chinese patent publication number CN101951290A proposes a kind of " EPON optical channel protection technology ", and this method is to provide optical switch at EPON equipment end port, far-end ONU port place, in order to protect optical fiber channel; When other faults occur on the second optical link, additional faults will easily occur due to switching

In this type of solution, only 1:N protection mode can be provided, and for PON systems, there are a large number of optical ports at the central office, and the system can only provide one-way protection, and it will not be able to do so when multiple optical ports fail. time protection

[0008] It can be seen that it is generally not possible to propose a reasonable optical network protection method for the communication equipment with many optical communication ports and the complex optical network structure at the same time.

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