Patent ID: 11943136
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The method of claim 13, wherein the forwarding the data packet to the next backup element is based on the backup PPR information instead of the PPR information, the method further comprising:
determining that the next backup element on the PPR graph is unavailable;
searching the forwarding database to determine another backup element on the backup PPR graph along which to forward the data packet in response to the next element on the PPR graph being unavailable;
replacing the PPR-ID included in the data packet with a backup PPR-ID identifying the backup PPR graph; and
transmitting the data packet to the other backup element on the backup PPR graph based on the backup PPR information stored at the forwarding database.