| 摘要 |
<p>On the basis of the throughputs of uplink signals from multiple radio terminals, a mode setting unit (30) sets two or more radio terminals to a collaborative spatial multiplex mode in which the same uplink data burst region is shared therebetween. A burst region report unit (41) reports the uplink data burst region shared between the two or more radio terminals to the two or more radio terminals set to the collaborative spatial multiplex mode. Concerning a first type of radio terminal which transmits a known signal from multiple antennas, a switching unit (95) switches the MIMO system of a downlink signal from a space-time coding system to a spatial multiplex system when the communication quality and the spatial correlation coefficient satisfy a predetermined condition.</p> |
