Patent ID: 7924856
Filing Date: 2011-04-12
Classification: H04L

Abstract:
1. A node device for use in a tree-shaped broadcasting system including a plurality of node devices connected and located in a hierarchy, the node device comprising: a receiver configured to receive a plurality of packets of content data transmitted from a node located at one level higher in the hierarchy or a broadcasting device located at a top of the hierarchy; a lost packet detector configured to detect a lost packet from the packets of the content data received by the receiver; a packet complement request information transmitter configured to transmit packet complement request information to the node device located at one level higher in the hierarchy, the packet complement request information including a packet complementation request to complement the lost packet; and a dummy packet transmitter configured to transmit a dummy packet to a node located at one level lower in the hierarchy instead of the lost packet, the dummy packet including information to delay transmission of the packet complement request information for a predetermined period of hold time.