Time-based scheduling for tunnels computed by a stateful path computation element

摘要

In one embodiment, a path computation element (PCE) in a computer network receives one or more path computation requests (PCReqs), and records a time of each PCReq and the corresponding requested bandwidth. Based on this information, the PCE may determine a traffic profile of the computer network, and may augment a traffic engineering database (TED) with requested bandwidth according to time based on the traffic profile. As such, prior to a particular time, the PCE may determine placement of tunnels within the traffic profile for the particular time.

主权项

1. A method, comprising:
receiving one or more path computation requests (PCReqs) at a path computation element (PCE) in a computer network; recording, by the PCE, a time of that each PCReq is received and an amount of bandwidth that is request by each PCReq at the time by each PCReq; determining, by the PCE, a traffic profile of the computer network based history of the bandwidth requested over time; predictively augmenting, by the PCE, a traffic engineering database (TED) with requested bandwidth according to time based on the traffic profile; determining, by the PCE prior to a particular time, placement of tunnels within the traffic profile for the particular time; and signaling, by the PCE to one or more head-ends nodes, the placement of the tunnels for the particular time.