Network based multicast stream duplication and merging
US8184628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2009 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Jul 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/185
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a method includes receiving a join message from a receiver at a receiver edge router, the join message identifying a source and a group, and creating at least two forwarding trees for transmitting multicast data streams comprising duplicate data to the receiver edge router. The forwarding trees include a root at a source edge router in communication with the source, and different network paths. The method further includes receiving a packet from one of the forwarding trees and processing the received packet to determine if the packet is a duplicate of another packet received at the receiver edge router. If the packet is a duplicate packet, it is discarded. If the packet is not a duplicate, it is forwarded to the receiver. An apparatus is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.