Kddi Corporation

Yuji Ikeda

Satoshi Konishi

Xiaoqiu Wang

Yasuhiko Hiehata

A wireless communication system includes an upper transmission station and a lower transmission station, each serving as a transmission station, a terminal serving as a reception station. The upper transmission station allocates a downlink control channel for each terminal to part of a predetermined data-channel region ascribed to the lower transmission station based on a demodulation reference signal for each transmission station. Based on the allocation result, the lower transmission station allocates the downlink control channel for each terminal, which is disposed at art of the data-channel region thereof. The terminal decodes the downlink control channel based on the demodulation reference signal.

Wireless communication system, terminal, transmission station, and wireless communication program

A wireless communication device is disclosed in which signal quality values C[t] of a wireless signal received by the wireless communication device is successively measured at variable time intervals &#x394;t, mean value &#x3bc; of the successively-measured signal quality values C[t] is calculated, standard deviation &#x3c3; of the successively-measured signal quality values C[t] is calculated, a determination is made as to whether the signal quality value C[t] at present time satisfies a predetermined inequality which represents that a signal quality value C[t] at arbitrary time lies within k times the standard deviations &#x3c3; away from the mean value &#x3bc;, and lengths of the time intervals &#x394;t for the measurement device are controlled based on the determination.

Growing community of inventors

Fujimino, Japan

Yuji Ikeda