Method, node device and system for establishing label switched path

摘要

A method, node device, and system are disclosed for establishing a label switched path, which belong to the field of communications technologies. Establishing the label switched path between a source node and a sink node utilizes a connection establishment request message that carries bandwidth request information corresponding to different conditions. Based on the bandwidth request information corresponding to the different conditions, various amounts of bandwidth resources corresponding to the different conditions are reserved on local links that establish a connection between the source node and the sink node.

主权项

1. A method for establishing a label switched path, comprising:
receiving, by a node, a Path message from a source node, wherein the Path message carries bandwidth request information, the bandwidth request information including a plurality of availability parameters and a plurality of respective requested bandwidths under the plurality of availability parameters, wherein each of the plurality of availability parameters corresponds to a time scale for which a corresponding requested bandwidth is ensured; comparing each of the plurality of requested bandwidths with a respective remaining bandwidth under the availability parameter corresponding to the requested bandwidth; and reserving, based on each of the plurality of requested bandwidths being smaller than or equal to the respective remaining bandwidth under the availability parameter corresponding to the requested bandwidth, the plurality of requested bandwidths.