User equipments, base stations and methods
A user equipment (UE) is described that includes a higher-layer processor configured to configure a shortened transmission timing interval (TTI) for a serving cell. The UE also includes a physical uplink channel transmitter configured to transmit a physical uplink control channel (PUCCH) on the serving cell. The UE further includes a shortened physical uplink channel transmitter configured to transmit a shortened physical uplink control channel (SPUCCH) on the serving cell. In a case that a transmission instance of the SPUCCH collides with an uplink subframe where the PUCCH is to be transmitted, the PUCCH is dropped, and the SPUCCH is transmitted.
1. A terminal apparatus comprising:
a higher-layer processor configured to configure a short transmission timing interval (sTTI) for a first serving cell;
a physical uplink channel transmitter configured to transmit a physical uplink control channel (PUCCH) on the first serving cell; and
a short physical uplink channel transmitter configured to transmit a short physical uplink control channel (SPUCCH) on the first serving cell; wherein
in a case of a collision between the PUCCH and the SPUCCH in a subframe, the PUCCH is dropped.
2. A base station apparatus comprising:
a higher-layer processor configured to send information indicating a short transmission timing interval (sTTI) for a first serving cell;
a physical uplink channel receiver configured to receive a physical uplink control channel (PUCCH) on the first serving cell; and
a short physical uplink channel receiver configured to receive a short physical uplink control channel (SPUCCH) on the first serving cell; wherein
in a case of a collision between the PUCCH and the SPUCCH in a subframe, the base station apparatus assumes that the PUCCH is dropped.
3. A method for a terminal apparatus, the method comprising:
configuring a short transmission timing interval (sTTI) for a first serving cell;
transmitting a physical uplink control channel (PUCCH) on the first serving cell; and
transmitting a short physical uplink control channel (SPUCCH) on the first serving cell; wherein
in a case of a collision between the PUCCH and the SPUCCH in a subframe, the PUCCH is dropped.
4. A method for a base station apparatus, the method comprising:
sending information indicating a short transmission timing interval (sTTI) for a first serving cell;
receiving a physical uplink control channel (PUCCH) on the first serving cell; and
receiving a short physical uplink control channel (SPUCCH) on the first serving cell; wherein
in a case of a collision between the PUCCH and the SPUCCH in a subframe, the base station apparatus assumes that the PUCCH is dropped.