Patent ID: 11917455
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. A control station controlling a plurality of radio base stations, each of the radio base stations performing, with a plurality of radio terminal stations, communication of a first method in which reception confirmation is enabled and communication of a second method in which reception confirmation is not possible, wherein the communication of the first method is unicast communication, and the communication of the second method is multicast communication or broadcast communication, the control station comprising:
a network communication unit configured to receive radio communication information in the communication of the first method between each of the radio base stations and the radio terminal stations and radio environment information about radio communication except the radio base stations, through a network, and to transmit transmission parameters in the communication of the second method between each of the radio base stations and the radio terminal stations, to the radio base stations through the network; and
an information processing unit configured to determine transmission parameters in the communication of the second method between each of the radio base stations and the radio terminal stations, based on the radio communication information and the radio environment information received from the plurality of radio base stations, and to transmit the determined transmission parameters to the radio base stations,
wherein transmission parameters include all of a modulation level, a length of guard interval, a number of transmission streams, bandwidth, and an error method.