| US 7,415,015 B2 | ||
| Centralized IGMP GMQ timing | ||
| Gregory Gyetko, Dunrobin (Canada) | ||
| Assigned to Alcatel, Paris (France) | ||
| Filed on Jun. 18, 2004, as Appl. No. 10/869,938. | ||
| Claims priority of provisional application 60/483647, filed on Jul. 01, 2003. | ||
| Prior Publication US 2005/0002396 A1, Jan. 06, 2005 | ||
| Int. Cl. H04L 12/56 (2006.01) | ||
| U.S. Cl. 370—390 [370/432; 370/254; 709/238] | 4 Claims |
| 1. A system for performing a General Membership Query (GMQ) on an Internet Group Management Protocol (IGMP) router on homes
serviced by the IGMP router or channels wherein each channel has a corresponding broadcast group, the system comprising:
a plurality of hosts; and
an IGMP router, the router characterized in that:
a plurality of counters are provided at the IGMP router,
each counter being associated with a unique host and channel combination,
each counter being incremented after a response time interval, said response time interval beginning when the IGMP router
sends a GMQ message to the host, has elapsed and the IGMP router has failed to receive a Join report for the host and channel
combination associated with that counter and responsive to a counter being equal to a selected robustness parameter, the host
and channel combination associated with the counter is dropped from the broadcast group corresponding to the channel of that
host and channel combination, and wherein the response time interval is timed by one timer for all of the host and channel
combinations and the same value of the robustness parameter is applicable to all the counters and is likewise programmable.
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