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

Patent metadata

Field	Value
Publication number	US-9590785-B2
Application number	US-201615259830-A
Country	US
Kind code	B2
Filing date	Sep 8, 2016
Priority date	Mar 14, 2012
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

There are provided a terminal device, a base station device, and an integrated circuit 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. A terminal device that transmits a demodulation reference signal associated with a physical uplink shared channel to a base station device includes determining a sequence group number on the basis of a value of a parameter configured by a higher layer, determining the sequence group number on the basis of a physical layer cell identity, and generating a sequence of the demodulation reference signal on the basis of the sequence group number, wherein the sequence group number is determined on the basis of the physical layer cell identity in a case where a transmission on the physical uplink shared channel corresponding to a downlink control information format to which CRC parity bits scrambled by a Temporary C-RNTI are attached is performed in a random access procedure.

First claim

The invention claimed is:

1. A terminal device comprising:
receiving circuitry configured to receive a first parameter indicating that a sequence group hopping is enabled or disabled; and
transmitting circuitry configured to transmit 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 a value related to a cyclic shift, the sequence group number being given by a second parameter, the value related to the cyclic shift being given by a third parameter, wherein
a value of the second 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, 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, and the sequence group hopping is enabled,
the value of the second parameter is given by a physical layer cell identity in a case that no value of the first information is configured by the higher layer and the sequence group hoping is enabled,
the 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 a random access response grant and the sequence group hopping is enabled,
a value of the third parameter is given by a 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, 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 value of the third parameter is given by the physical layer cell identity in a case that no value of the second information is configured by the higher layer, and
the value of the third parameter is given by the physical layer cell identity in a case that the transmission of the physical uplink shared channel corresponds to the random access response grant.

2. The terminal device according to claim 1 , wherein
the value of the second parameter is zero in a case that the sequence group hopping is disabled.

3. The terminal device according to claim 1 , wherein
the transmission of the physical uplink shared channel that corresponds to the random access response grant is used for a transmission of a message 3 in a random access procedure.

4. The terminal device according to claim 1 , wherein
the 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 a temporary C-RNTI are attached and the sequence group hopping is enabled, and
the value of the third 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 and the sequence group hopping is enabled.

5. The terminal 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 a retransmission of a transport block in a random access procedure.

6. A base station device comprising:
transmitting circuitry configured to transmit a first parameter indicating that a sequence group hopping is enabled or disabled; and
receiving circuitry configured to receive 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 a value related to a cyclic shift, the sequence group number being given by a second parameter, the value related to the cyclic shift being given by a third parameter, wherein
a value of the second 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, 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, and the sequence group hopping is enabled,
the value of the second parameter is given by a physical layer cell identity in a case that no value of the first information is configured by the higher layer and the sequence group hoping is enabled,
the 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 a random access response grant and the sequence group hopping is enabled,
a value of the third parameter is given by a 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, 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 value of the third parameter is given by the physical layer cell identity in a case that no value of the second information is configured by the higher layer, and
the value of the third parameter is given by the physical layer cell identity in a case that the transmission of the physical uplink shared channel corresponds to the random access response grant.

7. The base station device according to claim 6 , wherein
the value of the second parameter is zero in a case that the sequence group hopping is disabled.

8. The base station device according to claim 6 , wherein
the transmission of the physical uplink shared channel that corresponds to the random access response grant is used for a transmission of a message 3 in a random access procedure.

9. The base station device according to claim 6 , wherein
the 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 a temporary C-RNTI are attached and the sequence group hopping is enabled, and
the value of the third 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 and the sequence group hopping is enabled.

10. The base station device according to claim 9 , 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 a retransmission of a transport block in a random access procedure.

11. A communication method of a terminal device comprising:
receiving a first parameter indicating that a sequence group hopping is enabled or disabled; and
transmitting 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 a value related to a cyclic shift, the sequ

Assignees

• Sharp Kk

Inventors

• Aiba Tatsushi
• Suzuki Shoichi
• Imamura Kimihiko
• Ouchi Wataru
• Yokomakura Kazunari

Classifications

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04L5/0073

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

• H04L5/0035

  Resource allocation in a cooperative multipoint environment · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L27/2613

  Structure of the reference signals · CPC title