Path calculation method, system and node equipment

A technology of path calculation and node equipment, which is applied in the field of transmission network, can solve the problems of unfavorable network stability such as simplification of PCE side processing flow, achieve the effect of simplifying the synchronization processing flow of resource allocation information and improving reliability
CN101984602AInactive Publication Date: 2011-03-09ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZTE CORP
Publication Date
2011-03-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of transport network, in particular to a path calculation method, a system and node equipment. The method in the invention comprises the following steps: receiving a path calculation request by the node equipment; from a PCE ( path calculation element) server capable of performing the path calculation request in a local path calculation region, selecting a primary PCE server according to a set selection strategy; sending the path calculation request to the primary PCE server; according to the path calculation request, performing path calculation and resource distribution by the primary PCE server; and notifying path calculation and resource distribution information to other PCE servers in the path calculation region. At least one embodiment in the invention simplifies the synchronous processing flow of the integral resource distribution information of the network in the path calculation region, and improves the reliability of path calculation and resource distribution under the PCE environment.
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Description

technical field

[0001] The invention relates to the field of transmission networks, in particular to a path calculation method, system, and node equipment. Background technique

[0002] In the transmission network, the proposal of path computing element (PCE, path compute element) and PCEP (path compute element communication protocol, PCE communication protocol) provides a feasible way for cross-domain path computing, and also provides a basis for TE LSP of different manufacturers' products. (traffic-engineering label switched path, traffic engineering label switching path) computing interconnection creates conditions.

[0003] Usually, path calculation and resource allocation are two sub-problems of RWA (routing and resource assignment). After the path calculation and resource allocation are successful, the connection management submodule (CC, Connection Controller) sends a PATH message through RSVP (Resource ReServation Protocol, resource reservation protocol)-TE to estab...

Claims

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