Tree-shaped broadcasting system, packet transmitting method, node device, and computer-readable medium
AssigneeBrother Kogyo Kabushiki Kaisha
InventorYasushi Yanagihara
Life of this patent
Estimating the term…
Abstract
A lost packet in a plurality of packets broadcasted from a broadcasting apparatus is detected. Packet complement request information indicative of a packet complement request for complementing the lost packet is transmitted to a device in a high hierarchical level, and a dummy packet for holding transmission of the packet complement request information for a predetermined hold time is transmitted in place of the lost packet to a node device connected in a low hierarchical level.
Claims7
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.
A Non-transitory computer readable medium having computer executable instructions for performing a method of controlling a node device for use in a tree-shaped broadcasting system including a plurality of node devices connected and located in a hierarchy, the method comprising the steps of:
- receiving a plurality of packets of content data transmitted from a node device located at one level higher in the hierarchy or a broadcasting device located at a top of the hierarchy;
- detecting a lost packet from the packets of the content data received;
- transmitting packet complement request information including a packet complementation request to complement the lost packet to the node device located at one level higher in the hierarchy;
- and
- transmitting a dummy packet to a node located at one level lower in the hierarchy instead of the lost packet.
A method of controlling a node device for use in a tree-shaped broadcasting system including a plurality of node devices connected and located in a hierarchy, the method comprising the steps of:
- receiving a plurality of packets of content data transmitted from a node device located at one level higher in the hierarchy or a broadcasting device located at a top of the hierarchy;
- detecting a lost packet from the packets of the content data received;
- transmitting packet complement request information including a packet complementation request to complement the lost packet to the node device located at one level higher in the hierarchy;
- and
- transmitting a dummy packet to a node located at one level lower in the hierarchy instead of the lost packet.
Dependencies are inferred from the claim text.