Method of multicasting
US5905871A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1996 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Oct 10, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/27
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multicasting method transmits data segments, including one or more data packets, over an established global multicast tree from a Sender S to a dynamically changing set of receivers, including at least one unknown Receiver R. In response to a data segment transmission, the Sender S receives a first status signal from the at least one unknown Receiver R (and/or any known Designated Receivers DRs) indicating the addition of and packet reception status of the unknown Receiver R (and/or any known Designated Receivers DRs) which has joined the multicast. In response to the status signals, the Sender S retransmits to the unknown Receiver R (and/or any known Designated Receivers DRs) those packets not received thereat. In this manner the unknown Receiver R (and/or any known Designated Receivers DRs) is added to the multicast session and retransmissions thereto are handled in the same manner as other receivers connected to the multicast session.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.