Patent ID: 8265647
Filing Date: 2012-09-11
Classification: H04W

Abstract:
1. A communication device for performing wireless communication with a terminal, comprising: a reference-signal reception unit which receives from said terminal a pilot signal spreading over a plurality of sub-bands for evaluation of communication quality of the sub-bands; a communication-quality measurement unit which measures communication quality of each of the plurality of sub-bands on a basis of the pilot signal that is received; and a sub-band assignment unit which assigns a first single sub-band among the plurality of sub-bands to the terminal on a basis of the measured communication quality, for the terminal to perform wireless communication with the communication device in non-hopping mode; and wherein: the sub-band assignment unit causes the terminal to perform wireless communication in the non-hopping mode by using the first single sub-band for a predetermined time, and thereafter to switch from the non-hopping mode to hopping mode to continue the wireless communication by using the plurality of sub-bands in turn, the communication-quality measurement unit re-measures communication quality of each of the plurality of sub-bands based on the pilot signal received during the wireless communication in the hopping mode, and the terminal stops the hopping mode upon completion of one round of using the plurality of sub-bands, and the sub-band assignment unit re-assigns a second single sub-band to the terminal which is selected from among the plurality of sub-bands based on the re-measured communication quality and causes the terminal to continue the wireless communication in non-hopping mode by using the second single sub-band.