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A method and device for long-term storage of cross-domain path information

A path information and path technology, applied in the field of communications, can solve the problem that path information cannot be stored for a long time, and achieve the effect of facilitating recovery and optimization

Active Publication Date: 2017-08-04
重庆智慧之源科技成果转化服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that path information cannot be stored for a long time, the present invention provides a method and device for long-term storage of cross-domain path information

Method used

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  • A method and device for long-term storage of cross-domain path information
  • A method and device for long-term storage of cross-domain path information
  • A method and device for long-term storage of cross-domain path information

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Embodiment Construction

[0036] The structure and principle of the present invention will be described in detail below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, not to limit the protection scope of the present invention.

[0037] like figure 1 As shown, in order to solve the problem that path information cannot be stored for a long time in this embodiment, a method for long-term storage of cross-domain path information is provided for stateless PCE, including the following steps:

[0038] The path head node sends the path request information including the path head node and the path end node to the second PCE corresponding to the second domain where the path end node is located through the first PCE corresponding to the first domain, so that the first PCE calculates the An intra-domain path and generate a first PATH-KEY corresponding to the first intra-domain path, and calculate the path head node according to the path respons...

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Abstract

The present invention relates to a method and device for long-term storage of cross-domain path information, which is used for stateless PCE. The method for long-term storage of cross-domain path information includes the following steps: the first PCE calculates the path; the head node of the path sends a query message to the first PCE The query information of the path information in the first domain corresponding to the first PATH-KEY, and generate a third PATH-KEY with a unique identifier corresponding to the path information in the first domain according to the query result returned by the first PCE, and save it; the path header The node sends inter-domain routing signaling including the third PATH-KEY and the second PATH-KEY to the first node in the second domain, so that the first node in the second domain sends a query to the second PCE corresponding to the second PATH-KEY The query information of the path information in the second domain, and generate a uniquely identified fourth PATH-KEY corresponding to the path information in the second domain according to the query result returned by the second PCE, and save it; the path head node returns according to the path end node The reverse signaling of the third PATH‑KEY and the fourth PATH‑KEY is included to change the path information from the path head node to the path end node.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for long-term storage of cross-domain path information. Background technique [0002] In the process of multi-domain path calculation, if the domains do not trust each other, they need to hide their own internal path information from other domains, that is, the path needs to be kept secret. [0003] When PCE (Path Computation Element, Path Computation Element) provides path computation, path secrecy is implemented through the mechanism of PATH-KEY (Path Key), which is described in RFC5520. The general meaning of this technology is as follows: [0004] PCE calculates a path in the domain, and before returning the path result to PCE in other domains, a PATH-KEY sub-object can be used to replace the detailed intra-domain path. Before the PATH-KEY sub-object, reserve the TERouterID of the incoming border node as a hop. The standard recommends that the PATH-KEY info...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/701H04L12/703H04L45/02H04L45/28H04L45/42
CPCH04L45/42H04L41/145H04L41/28H04L45/02H04L41/12
Inventor 吕文祥王家昱卢刚王志宏曹徐平
Owner 重庆智慧之源科技成果转化服务有限公司