TREE TYPE BROADCAST SYSTEM, RECONNECTING PROCESSING METHOD, NODE DEVICE, NODE PROCESSING PROGRAM, SERVER APPARATUS, AND SERVER PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a tree type broadcast system capable of offering each node device with a candidate having optimality equivalent to a candidate of a connection destination obtained from a connection destination introduction server, while reducing a load imposed onto the connection destination introduction server for managing topology, in order to stabilize topology.

SOLUTION: Each node device receives connection destination candidate information broadcast from an upper-layer node device to which the own node is connected and indicative of node devices being candidates of reconnecting destination. Each node device selects a node device suitable to the attribute information of the own node as a candidate of reconnecting destination from among the node devices listed in the connection destination candidate information. Each node device stores information on the node device selected as the candidate of reconnecting destination. When the connection between the upper-layer node device and the own node is canceled and reconnection is newly carried out to another node device, each node device selects one node device from among the candidates of reconnecting destination as a reconnecting destination, and connects to the node device selected as the specified reconnecting destination.

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