Patent ID: 8559965
Filing Date: 2013-10-15
Classification: H04L,H04W,Y02D

Abstract:
1. A radio base station apparatus in a radio communication system in which different frequency bands are used between uplink where a signal is transmitted from a radio terminal apparatus to the radio base station apparatus and downlink where a signal is transmitted from the radio base status apparatus to the radio terminal apparatus, the apparatus comprising: a pilot forming section that forms a first pilot signal, which is a signal for measuring communication quality of the uplink at the radio terminal apparatus; and a transmission section that transmits the first pilot signal in the downlink in a transmission period for the first pilot signal, using a frequency band used for the uplink; and a communication quality measurement section that measures communication quality of the uplink based on a second pilot signal transmitted from the radio terminal apparatus in a band in which the communication quality measured at the radio terminal apparatus based on the first pilot signal is equal to or better than a predetermined level.