Base station, terminal, and communication method
A base station ( 100, 300 ) is provided with a transmitter and a receiver. The transmitter ( 109 ) transmits a downlink signal in a downlink transmission region, in a time unit that includes the downlink transmission region, an uplink transmission region, and a gap period that is a switching point between the downlink transmission region and the uplink transmission region. The receiver ( 111 ) receives an uplink signal in the uplink transmission region, in the time unit. Furthermore, a delay tolerant signal for which a delay is tolerated more than for the downlink signal and the uplink signal is mapped to within the gap period.
1. A base station comprising:
a transmitter, which, in operation, transmits a downlink signal in a downlink transmission region, in a subcarrier subframe, the subcarrier subframe including the downlink transmission region, an uplink transmission region, and a gap period between the downlink transmission region and the uplink transmission region; and
a receiver, which, in operation, receives an uplink signal in the uplink transmission region, in the subcarrier subframe,
wherein a delay tolerant signal for which a delay is tolerated more than for the downlink signal and the uplink signal is mapped to within the gap period in the subcarrier subframe, and
the delay tolerant signal is a sounding reference signal (SRS).
2. The base station according to claim 1 ,
wherein the receiver receives the delay tolerant signal mapped to the gap period arranged after the uplink transmission region.
3. The base station according to claim 1 ,
wherein the delay tolerant signal is mapped to a resource associated on a one-to-one basis with a resource used to transmit assignment information indicating a resource assignment for data transmitted in a same subcarrier subframe as the delay tolerant signal.
4. The base station according to claim 1 , wherein the delay tolerant signal is not mapped to the uplink transmission region and the downlink transmission region beyond the gap period.
5. A terminal comprising:
a receiver, which, in operation, receives a downlink signal in a downlink transmission region, in a subcarrier subframe, the subcarrier subframe including the downlink transmission region, an uplink transmission region, and a gap period between the downlink transmission region and the uplink transmission region; and
a transmitter, which, in operation, transmits an uplink signal in the uplink transmission region, in the subcarrier subframe,
wherein a delay tolerant signal for which a delay is tolerated more than for the downlink signal and the uplink signal is mapped to within the gap period in the subcarrier subframe, and
the delay tolerant signal is a sounding reference signal (SRS).
6. The terminal according to claim 5 , wherein the delay tolerant signal is not mapped to the uplink transmission region and the downlink transmission region beyond the gap period.
7. A communication method including:
transmitting a downlink signal in a downlink transmission region, in a subcarrier subframe including the downlink transmission region, an uplink transmission region, and a gap period between the downlink transmission region and the uplink transmission region; and
receiving an uplink signal in the uplink transmission region, in the subcarrier subframe,
wherein a delay tolerant signal for which a delay is tolerated more than for the downlink signal and the uplink signal is mapped to within the gap period in the subcarrier subframe, and
the delay tolerant signal is a sounding reference signal (SRS).
8. A communication method including:
receiving a downlink signal in a downlink transmission region, in a subcarrier subframe, the subcarrier subframe including the downlink transmission region, an uplink transmission region, and a gap period between the downlink transmission region and the uplink transmission region; and
transmitting an uplink signal in the uplink transmission region, in the subcarrier subframe,
wherein a delay tolerant signal for which a delay is tolerated more than for the downlink signal and the uplink signal is mapped to within the gap period in the subcarrier subframe, and
the delay tolerant signal is a sounding reference signal (SRS).