Terminal device, communication method, and integrated circuit
A terminal device and a base station device efficiently communicate with each other by using multiple cells. The terminal device selects a PUCCH resource used to transmit an SR, from a first PUCCH resource in a first cell and a second PUCCH resource in a second cell, and transmits the SR by using the selected PUCCH resource in a first subframe. In a case that a first PUCCH not including a transport block in the first subframe is transmitted in the first cell, the second PUCCH resource in the first subframe is selected.
1. A terminal device comprising:
selection circuitry configured to select a physical uplink control channel (PUCCH) resource used to transmit a scheduling request, from a first PUCCH resource in a first subframe in a first serving cell and a second PUCCH resource in the first subframe in a second serving cell; and
transmission circuitry configured to transmit Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) by using a predetermined PUCCH format, in the first subframe in the first serving cell; wherein
in a case that the PUCCH resource is selected in the first serving cell,
the transmission circuitry is configured
to transmit, in the first subframe in the first serving cell, the HARQ-ACK using the predetermined PUCCH format and the scheduling request, and
not to transmit, in the first subframe in the second serving cell, the scheduling request using a PUCCH format 1, and
in a case that the PUCCH resource is selected in the second serving cell,
the transmission circuitry is configured to
transmit, in the first subframe in the second serving cell, the HARQ-ACK using the predetermined PUCCH format and the scheduling request, and
transmit, in the first subframe in the second serving cell, the scheduling request using the PUCCH format 1.
2. A communication method to be used by a terminal device, the method comprising the steps of:
selecting a physical uplink control channel (PUCCH) resource used to transmit a scheduling request, from a first PUCCH resource in a first subframe in a first serving cell and a second PUCCH resource in the first subframe in a second serving cell; and
transmitting Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) by using a predetermined PUCCH format, in the first subframe in the first serving cell; wherein
in a case that the PUCCH resource is selected in the first serving cell,
transmitting, in the first subframe in the first serving cell, the HARQ-ACK using the predetermined PUCCH format and the scheduling request, and
not transmitting, in the first subframe in the second serving cell, the scheduling request using a PUCCH format 1, and
in a case that the PUCCH resource is selected in the second serving cell,
transmitting, in the first subframe in the second serving cell, the HARQ-ACK using the predetermined PUCCH format and the scheduling request, and
transmitting, in the first subframe in the second serving cell, the scheduling request using the PUCCH format 1.