Patent ID: 7983196
Filing Date: 2011-07-19
Classification: H04L

Abstract:
1. A broadcast device in a tree-type broadcast system formed by participation of a plurality of node devices that forms a plurality of hierarchy levels, wherein the broadcast device is located at a top position of the tree-type broadcast system and the node devices are connected in a tree-like shape through a communication circuit to enable content data broadcasted by the broadcast device are sequentially transferred from the node devices in an upper hierarchy level to the node devices in a lower hierarchy level, the node devices comprising: a mode selection unit configured to select either one of modes of a first mode and a second mode, the first mode determining a reconnection destination by acquiring node information to be the reconnection destination from a server device which manages a connection mode between the node devices in the tree-type broadcast system, the second mode determining a reconnection destination by acquiring node information of the node device to be the reconnection destination candidate from at least one of the node devices participating in the tree-type broadcast system; and a reconnection processing unit configured to determine the reconnection destination by acquiring the node information according to the mode selected by the mode selection unit, the broadcast device in the tree-type broadcast system comprising: a load status monitor unit configured to monitor a load status of the server device; and a switch instruction information transmission unit configured to transmit switch instruction information for instructing the node devices to switch selection to the second mode, in response to determining that a monitor level of the load status reaches a threshold level.