Controller, communication system, and radio control method

A communication system comprising:

• a plurality of radio devices;
• a terminal device configured to receive data via the plurality of radio devices;
• and
• a controller configured to control radio transmission of the plurality of radio devices,
• all or part of the plurality of radio devices constituting a cluster, wherein the controller
• acquires radio propagation characteristics between the terminal device and the radio devices,
• determines a plurality of radio devices constituting the cluster to which the terminal device belongs, based on the acquired radio propagation characteristics, and
• determines the transmission weights of each of the plurality of radio devices constituting the cluster, based on the radio propagation characteristics of each of the plurality of radio devices constituting the cluster and instructs the plurality of radio devices constituting the cluster to transmit the data with the determined transmission weights of each of the plurality of radio devices to the terminal device, and
• the plurality of radio devices constituting the cluster transmits the data with a same frequency and determined transmission weights of each of the plurality of radio devices to the terminal device.

A radio control method by a controller that controls radio transmission of a plurality of radio devices in a radio communication system in which the plurality of radio devices constituting a cluster transmits to a terminal device belonging to the cluster data with a same frequency and transmission weights of each of the plurality of radio devices, the radio control method comprising:

• acquiring radio propagation characteristics between the terminal device and the plurality of radio devices;
• determining the plurality of radio devices constituting the cluster to which the terminal device belongs, based on the acquired radio propagation characteristics;
• and
• determining the transmission weights of each of the plurality of radio devices constituting the cluster, based on the radio propagation characteristics of each of the plurality of radio devices constituting the cluster, and instructing the plurality of radio devices constituting the cluster to transmit the data with the determined transmission weights of each of the plurality of radio devices constituting the cluster to the terminal device.