Patent Number: 7,613,460

Title: Radio device, channel allocation method, and channel, allocation program

Abstract: When there is a connection request to a base station supporting adaptive modulation from a terminal supporting adaptive modulation, the base station measures a D wave level that indicates communication environment of the transmission path. When the measured D wave level is not lower than a threshold value of D wave level at which communication is possible by a modulation method (16QAM) having larger multi-value number, the base station permits allocation of a wireless channel to the terminal. Therefore, even when the modulation method is switched from one having smaller multi-value number (.pi./4 shift QPSK) to one having larger multi-value number (16QAM) during communication after channel allocation to the terminal, degradation of communication quality due to the communication environment of the transmission path can be prevented.

Inventors: Matsui; Seiji (Gifu, JP), Kitakado; Jun (Hashima, JP)

Assignee: Kyocera Corporation

International Classification: H04W 72/00 (20090101)

Expiration Date: 1/03/02017