Terminal device, a base station device, a communication method, and an integrated circuit for processing demodulation reference signals

摘要

There are provided a terminal device, a base station device, a communication method, an integrated circuit, and a wireless communication system that enable a base station device and a terminal device to determine parameters related to uplink signals or uplink reference signals and to perform efficient communication. In a terminal device that transmits a demodulation reference signal, a sequence group number is determined on the basis of a value of a parameter configured by a higher layer in a case where a transmission on a physical uplink shared channel is performed in accordance with a downlink control information format to which CRC parity bits scrambled by a C-RNTI are attached, which is transmitted on an enhanced physical downlink control channel, and the sequence group number is determined on the basis of a physical layer cell identity in a case where a transmission on the physical uplink shared channel is performed in accordance with a downlink control information format to which CRC parity bits scrambled by a Temporary C-RNTI are attached, which is transmitted on a physical downlink control channel.

主权项

1. A terminal device comprising:
scheduling circuitry configured to generate a demodulation reference signal associated with transmission of a physical uplink shared channel, a demodulation reference signal sequence of the demodulation reference signal being given by a sequence group number and by a value of a cyclic shift; and transmitting circuitry configured to transmit, to a base station device, the demodulation reference signal, wherein the sequence group number is given by a first parameter, a value of the first parameter is given by a value of first information configured by a higher layer in a case that the value of the first information is configured by the higher layer and the transmission of the physical uplink shared channel corresponds to downlink control information to which Cyclic Redundancy Check (CRC) parity bits scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI) are attached, the downlink control information to which the CRC parity bits scrambled by the C-RNTI are attached being received on an Enhanced-Physical Downlink Control CHannel (E-PDCCH), a value of the first parameter is given by a physical layer cell identity in a case that the transmission of the physical uplink shared channel corresponds to downlink control information to which CRC parity bits scrambled by a temporary C-RNTI are attached, the downlink control information to which the CRC parity bits scrambled by the temporary C-RNTI are attached being received on a Physical Downlink Control CHannel (PDCCH) the value of the cyclic shift being given by a second parameter, a value of the second parameter is given by the value of second information configured by the higher layer in a case that the value of the second information is configured by the higher layer and the transmission of the physical uplink shared channel corresponds to the downlink control information to which the CRC parity bits scrambled by the C-RNTI are attached, the downlink control information to which the CRC parity bits scrambled by the C-RNTI are attached being received on the E-PDCCH, and a value of the second parameter is given by the physical layer cell identity in a case that the transmission of the physical uplink shared channel corresponds to the downlink control information to which the CRC parity bits scrambled by the temporary C-RNTI are attached, the downlink control information to which the CRC parity bits scrambled by the temporary C-RNTI are attached being received on the PDCCH.