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

Patent metadata

Field	Value
Publication number	US-9444557-B2
Application number	US-201314384322-A
Country	US
Kind code	B2
Filing date	Mar 13, 2013
Priority date	Mar 14, 2012
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

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.

First claim

The invention claimed is:

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.

2. The terminal device according to claim 1 , wherein
the demodulation reference signal sequence of the demodulation reference signal being given by a base sequence number, the base sequence number being given by the first parameter.

3. The terminal device according to claim 1 , wherein
the transmission of the physical uplink shared channel that corresponds to the downlink control information to which the CRC parity bits scrambled by the temporary C-RNTI are attached is used for indicating a retransmission of a transport block in a random access procedure.

4. A base station device comprising:
receiving circuitry configured to receive, from a terminal device, 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
demodulating circuitry configured to demodulate the physical uplink shared channel based on 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 transmitted 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 transmitted 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 transmitted 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 transmitted on the PDCCH.

5. The base station device according to claim 4 , wherein
the demodulation reference signal sequence of the demodulation reference signal being given by a base sequence number, the base sequence number being given by the first parameter.

6. The base station device according to claim 4 , wherein
the transmission of the physical uplink shared channel that corresponds to the downlink control information to which the CRC parity bits scrambled by the temporary C-RNTI are attached is used for indicating a retransmission of a transport block in a random access procedure.

7. A communication method of a terminal device comprising:
transmitting, to a base station device, 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, the sequence group number being given by a first parameter, wherein
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

Assignees

• Sharp Kk

Inventors

• Aiba Tatsushi
• Imamura Kimihiko
• Nogami Toshizoh
• Suzuki Shoichi
• Ouchi Wataru

Classifications

• H04L1/0057

  Block codes (H04L1/0061, H04L1/0064 take precedence) · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title