Multicast packet control apparatus
US7532624B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2006 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Nov 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/1881
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
When multicast distribution is performed on a network where a point-to-point connection is made between user terminals and a multicast router, the multicast router is protected from load due to response reports, join requests, or leave statements sent from the user terminals simultaneously. If the user terminals send response reports simultaneously, a Layer 2 switch disposed between the user terminals and the multicast router limits response reports sent to the multicast router. The Layer 2 switch prevents response reports sent from the same user terminal from being discarded consecutively, by sending a response report sent from the same user terminal to the multicast router 200 with priority in the next join confirmation event. If the user terminals send join requests or leave statements simultaneously, the Layer 2 switch limits the join requests or leave statements sent to the multicast router 200 in the same manner. The Layer 2 switch further enlarges a transmission buffer thereof at the multicast router side, so that the packets can be stored in the buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.