Multi-PCE path calculation interaction method and system

[0056] In order to establish and define a specific flow of path calculation interaction in a multi-PCE mode, a transmission channel between PCE and PCC is added, and path calculation and path construction requests are added. The first embodiment provides a multi-PCE path calculation interaction method, such as figure 2 and image 3 As shown, the method includes:

[0057] 101: Configure the PCC to establish an independent connection channel with at least one sub-PCE, and the PCC completes the establishment of a session with each sub-PCE.

[0058] 102: Configure each child PCE to establish an independent connection channel with the parent PCE, and each child PCE completes the establishment of a session with the parent PCE.

[0059] 103: Each sub-PCE announces the running state, and announces it again when the state changes.

[0060] 1041: When the PCC side generates a route calculation request, it selects an appropriate connection channel according to the PCE election policy pr

[0120] The second embodiment provides a multi-PCE path calculation interaction system, and the system is configured to execute the multi-PCE path calculation interaction method in the first embodiment.

[0121] The system can perform the actions of establishing a session between multiple PCEs and a PCC, announcing the running status of each PCE, generating a path calculation request on the PCC side, and generating a path establishment request on the PCE side. The system-defined multi-PCE path calculation interaction method in this embodiment 2 enriches and improves the networking deployment and interaction design of SDN intelligent path calculation, provides concurrent path calculation, path construction, load balancing capabilities, and ensures LSP between PCEs - Consistency and timeliness of DB data synchronization.