| 摘要 |
An eNB assigns an uplink SRS resource for transmitting the SRS utilized in an adaptive array control, and a PDSCH resource that overlaps, on a frequency axis, with the uplink SRS resource, to a UE. The eNB assigns the uplink SRS resource within a range of an SRS transmission available frequency band f1 that can be used for transmitting the SRS. When it is necessary to transmit downlink repeat data to a first UE when an assignment of the uplink SRS resource is switched from the first UE to a second UE, the eNB assigns the PDSCH resource for the downlink repeat data in an SRS transmission unavailable frequency band f2 outside the range of the SRS transmission available frequency band f1. |
| 主权项 |
1. A radio base station that performs radio communication by using adaptive array control and an automatic repeat request, in a TDD radio communication system, comprising:
a resource assignment unit that assigns an uplink reference signal resource for transmitting an uplink reference signal utilized in the adaptive array control and a downlink radio resource that overlaps, on a frequency axis, with the uplink reference signal resource, to a radio terminal, wherein the resource assignment unit assigns the uplink reference signal resource within a range of a first frequency band that can be used for transmitting the uplink reference signal, and when it is necessary to transmit downlink repeat data to the radio terminal when an assignment of the uplink reference signal resource is switched from the radio terminal to another radio terminal, the resource assignment unit assigns a downlink radio resource for a downlink repeat data in a second frequency band outside the range of the first frequency band.
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