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

Claim 0:
1. A transmission parameter control method in a radio communication system that performs, between a radio base station and 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, and

wherein the radio base station selects transmission parameters in the communication of the second method with the radio terminal stations, based on radio communication information in the communication of the first method with the radio terminal 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.