Multi-element network and cross network element complex section protection switching method
A technology of multiplex section protection and automatic protection switching, which is applied in the field of communication to prevent the switching time from being too long and meet the effect of protection performance
Inactive Publication Date: 2011-05-25
ZTE CORP
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Problems solved by technology
[0010] The technical problem to be solved by the present invention is to provide a multi-network element network and a method for multiplex section protection switching across network elements, which is used to solve the problem of promptly and accurately notifying the pseudowire protection side of the switching status on the multiplex section side, so that The switching status of the PW side and the MSP side are the same
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] Aiming at the problem of how to notify the generated switching state to the network element D configured with pseudowire redundancy group protection in the several situations described in the background technology, the present invention adopts the method of APS-like message notification, and the cross-network element complex Network element D is notified of the decision result of section protection, and network element D performs switching operations on the PW redundancy group according to the result of the cross-network element multiplexing section protection decision and other factors, so as to realize the protection of the entire network and meet the switching requirements of the entire network. performance requirements.
[0031] The multi-network elemen...
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The invention discloses a multi-element network and cross network element complex section protection switching method. A network element (B or C) configured with cross network element complex section protection and a network element (D) configured with pseudowire redundancy group protection are adopted in the method, wherein when a working link or a protection link is switched, the network element configured with the cross network element complex section protection encapsulates a switching state as message and sends the message to the network element configured with the pseudowire redundancy group protection; and the network element configured with the pseudowire redundancy group protection resolves the received message, then takes out the switching state, and executes the switching of the pseudowire redundancy group protection side according to the decision of the switching state. By using the method, the pseudowire (PW) side can receive the switching state of the cross network element complex section protection side and can accurately receive the state so as to prevent over long switching time or wrong switching result and the like.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to a multi-network element network and a method for multiplex section protection switching across network elements. Background technique [0002] Linear multiplex section protection is defined in ITU-T (International Telecommunication Union Telecommunications Standardization Sector) G.841, which is a dedicated or common protection mechanism used to protect the multiplex section layer . Linear multiplex section protection is applicable to point-to-point physical networks. One multiplex section protection is used to protect a certain number of working multiplex sections, but cannot provide protection against node failures. Multiplex section protection can work on single-ended or double-ended. In addition, when the multiplex section protection is in an idle state, it can also be used to open additional services that do not need protection. [0003] At the same time, a mechani...
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IPC IPC(8): H04L12/56H04L12/24
CPCH04L41/00
Inventor 薛亚军
Owner ZTE CORP