Mechanism for tracking host participation in multicast groups
US8849989B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2010 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/185
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method performed in a network element coupled between a subscriber end station and a multicast source for tracking a history of IGMP report messages. The network element receives and IGMP report message from the subscriber end station and determines a multicast group address and multicast source IP address corresponding to a multicast group to which the network element is a member. The network element builds an IGMP report history record indicating the subscriber end station's identity and comprises the multicast group address, the multicast source IP address, and a time stamp corresponding to the date and time at which the network element received the IGMP report message. This record is then stored in an IGMP report history database along with a plurality of other IGMP report history records so that the network element can maintain a history of IGMP report messages received from the subscriber end station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.