Explicit block encoding of multicast group membership information with bit index explicit replication (BIER)
US9432205B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2015 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Apr 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/74
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network device executes a method to forward a packet that is encoded using an explicit block encoding of multicast group membership information with Bit Index Explicit Replication. The method includes receiving a packet, where the packet includes a bitstring having a set of blocks, each block including a set identifier field and a SubBitString field. The method further includes selecting a block for processing, finding a first bit position of a SubBitString identifying a destination bit-forwarding router (BFR), looking up a forwarding bitmask for the destination BFR and a next-hop to reach the destination BFR in a bit index forwarding table, creating a copy of the packet, applying a bit-wise AND operation on the copy of the packet with the forwarding bitmask, forwarding the copy of the packet to the next-hop, and applying a bit-wise AND operation on the packet with an inverse of the forwarding bitmask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.