Wireless base station, wireless communication system, and wireless communication method

Abstract

When time at present is included in a high-traffic time period, an interference determining unit ( 37 ) determines that there is a possibility that a downlink signal to be received by any wireless terminal has interference with a pilot signal transmitted from a wireless base station. A pilot signal transmission control unit ( 40 ) controls the transmission of the pilot signal, which is included in an OFDMA frame or an OFDM frame. When it is determined that there is the possibility of interference, the pilot signal transmission control unit ( 40 ) stops the transmission of the pilot signal or reduces power of the pilot signal in a whole or a portion of a user data area.

1 . A wireless base station that communicates with a wireless terminal by an orthogonal frequency division multiple access (OFDMA) scheme or an orthogonal frequency division multiplexing (OFDM) scheme, comprising:
 a receiver configured to receive a measurement report that includes at least one of a downlink signal strength and a downlink signal communication quality that are measured by the wireless terminal, from the wireless terminal; and   a processor configured to stop transmission of a downlink signal from the wireless base station not to cause interference to a different wireless terminal from the wireless terminal when it is determined that a downlink signal transmitted from the wireless base station has interference based on the measurement report.   
     
     
         2 . A wireless communication method in a wireless base station that communicates with a wireless terminal by an orthogonal frequency division multiple access (OFDMA) scheme or an orthogonal frequency division multiplexing (OFDM) scheme, comprising:
 receiving a measurement report that includes at least one of a downlink signal strength and a downlink signal communication quality that are measured by the wireless terminal, from the wireless terminal; and   stopping transmission of a downlink signal from the wireless base station not to cause interference to a different wireless terminal from the wireless terminal when it is determined that a downlink signal transmitted from the wireless base station has interference based on the measurement report.