Patent ID: 11895674
Assignee: SAFRAN PASSENGER INNOVATIONS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 1:
2. The program of claim 1, the operations further comprising:
determining whether an origin of the received packet having a multicast group address is a preferred parent of the mote;
if the origin is the preferred parent, the router checking whether the multicast group address is listed in a routing table of the router;
if the origin is not the preferred parent, dropping the packet;
only if the multicast group address is listed in the routing table, the router forwarding the packet downward using a link layer unicast transmission or the link layer broadcast transmission as a function of the number of children;
after determining whether the multicast group address is listed in the routing table, the router checking whether the mote is a member of the multicast group; and
if the router determines that the mote is the member of the multicast group, delivering the packet upward.