Multicast packet delivery in a wireless network operating in non-storing mode
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United States of America Patent
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Jul 25, 2017
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app pub date -
Jan 22, 2015
filing date -
Jan 22, 2015
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Abstract
A router node according to an aspect of the present disclosure maintains multicast information indicating child nodes registered for respective multicasts, while operating in a non-storing mode along with other router nodes of a wireless network for processing unicast packets. Upon receiving a layer-3 multicast packet, the router node examines the multicast information to identify a set of child nodes registered for the corresponding multicast. The router node thereafter unicasts, at L2-level, the layer-3 multicast packet to each child node of the set of child nodes. In an embodiment, the router node participates in a routing protocol (e.g., RPL) to form a hierarchy of nodes constituting the wireless network, with the hierarchy containing a root node and a set of end devices as leaf nodes.
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