COMMUNICATION TERMINAL AND COMMUNICATION STATE CHANGE METHOD

摘要

A generating unit (210) generates group formation data for forming groups among nodes making up an ALM distribution tree. A transmitting unit (220) transmits the group formation data to a node that is a destination set to a communication terminal. When a condition for grouping is satisfied, the generating unit (210) converts the group formation data into data for changing at least one of the number of groups and the number of nodes corresponding to each of the groups. Every time the group formation data is converted, the transmitting unit (220) transmits the converted group formation data to the node that is the destination set to the communication terminal. The group formation data is data for forming a group in which a local improvement process of switching positions of two nodes with each other is performed.