A protection path calculation method, related equipment and system

Abstract

The present invention provides a protection path calculation method, related equipment and system. The first node of the protection path obtains the shared risk link group SRLG information of each link of the working path, and the SRLG information of each link of the working path is multi- It is unique within the scope of the domain, so that the SRLG information of each link of the working path can be correctly displayed when crossing domains, that is, to correctly distinguish whether a link shares risks with another link, and by using all SRLG information of each link in the link, calculate a protection path separate from the working path SRLG, to exclude links with the same SRLG information as any link on the working path, and to exclude links with any link on the working path Links with the same SRLG information have a mapping relationship, avoiding the situation that links with non-working paths should not be excluded, and effectively improving the survivability of cross-domain services in the communication network.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for calculating a protection path, related equipment and a system. Background technique [0002] The survivability of the communication network is an important technical indicator of the communication network. In order to improve the survivability of the communication network, it is necessary to reduce the impact of network failures on the communication services. Therefore, multiple communication paths can be configured to improve the survivability of the communication network. If there is a problem with one of the working paths among the communication paths dealing with communication services, it is ensured that there is at least one path separated from the working path in addition to the working path with the problem. The protection path is used to complete the communication service interrupted due to the failure of the working path through the protectio...

AI Technical Summary

Problems solved by technology

However, each control area independently allocates and manages its own SRLG information value, so the distribution of the global SRLG information value is irregular, and different control areas may assign different SRLG information values ​​to links sharing the same risk , thus calculating a working path and its corresponding protection path, even if it is confirmed that there is no link with the same SRLG value, it cannot show that the two paths are actually separated from each other

Or, different control regions may assign the same SRLG information value to links that do not share the same risk, resulting in wrong SRLG separation, that is, two links that do not share risks cannot be used by the working path and the protection path respectively, reducing Survivability of communication network

Therefore, the SRLG separation of the working path and the protection path cannot be realized by distinguishing the SRLG information value. Currently, the links of the protection path separated from the SRLG of the working path are obtained by excluding the links corresponding to the SRLG information values ​​of all links in the working path. However, the working path The SRLG information value of each link in all the SRLG information values ​​may not be unique, by excluding the SRLG information values ​​of all links of the working path, resulting in the obtained chain of the protection path separated from the working path SRLG The number of ways is reduced, and there is a risk of excluding links that should not be excluded, thereby reducing the quality of SRLG separation

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