Terminal device, communication method, and integrated circuit

Patent metadata

Field	Value
Publication number	US-2016150490-A1
Application number	US-201414889529-A
Country	US
Kind code	A1
Filing date	Apr 3, 2014
Priority date	May 9, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

Provided is a terminal device that performs communication with a base station device, the terminal device including a reception unit that receives information relating to a first configuration, information relating to a second configuration, and a downlink control information (DCI) format; and a transmission unit that transmit an uplink signal to the base station device in a case where the uplink signal is scheduled based on the DCI format, and switching between DCI formats that are applied to subframe sets, respectively.

First claim

1 . A terminal device that performs communication with a base station device, the terminal device comprising:
a reception unit that receives information relating to a first configuration, information relating to a second configuration, and a downlink control information (DCI) format; and a transmission unit that transmits an uplink signal to the base station device in a case where the uplink signal is scheduled based on the DCI format, wherein, in a case where both of the first configuration and the second configuration are set, the transmission unit
sets transmission power for the uplink signal that is transmitted on an uplink subframe (a first subframe) which belongs to a first subframe set, based on a power control adjustment value that is obtained by a transmit power control (TPC) command which is included in a DCI format (a first DCI format) that is used for the scheduling of the uplink signal or a DCI format (a second DCI format) that is used for transfer of the TPC command, and
sets the transmission power for the uplink signal that is transmitted on an uplink subframe (a second subframe) which belongs to a second subframe set, based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format.

2 . The terminal device according to claim 1 ,
wherein, when the first DCI format and the second DCI format are detected in the same subframe in the reception unit,
in a case where the first DCI format schedules the uplink signal for the first subframe, the transmission unit sets the transmission power for the uplink signal, based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format, and
in a case where the first DCI format schedules the uplink signal for the second subframe, the transmission unit sets the transmission power for the uplink signal based on the TPC command that is included in the first DCI format, and independently sets the transmission power based on the power control adjustment value that is obtained by the TPC command which is included in the second DCI format.

3 . The terminal device according to claim 1 or 2 ,
wherein, when only the second DCI format is detected in the reception unit, the transmission unit applies the power control adjustment value that is obtained by the TPC command which is included in the second DCI format, to the transmission power for the uplink signal that is transmitted on the second subframe, without depending on a subframe in which the second DCI format is detected.

4 . A communication method for use in a terminal device that performs communication with a base station device, the method comprising:
a step of receiving information relating to a first configuration, information relating to a second configuration, and a downlink control information (DCI) format; and a step of transmitting an uplink signal to the base station device in a case where the uplink signal is scheduled based on the DCI format, wherein, in a case where both of the first configuration and the second configuration are set, the step of transmitting the uplink signal includes
a step of setting transmission power for the uplink signal that is transmitted on an uplink subframe (a first subframe) which belongs to a first subframe set, based on a power control adjustment value that is obtained by a transmit power control (TPC) command which is included in a DCI format (a first DCI format) that is used for the scheduling of the uplink signal or a DCI format (a second DCI format) that is used for transfer of the transmit power control (TPC) command, and
a step of setting the transmission power for the uplink signal that is transmitted on an uplink subframe (a second subframe) which belongs to a second subframe set, based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format.

5 . The communication method according to claim 4 , further comprising:
a step of setting the transmission power for the uplink signal, based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format, in a case where the first DCI format schedules the uplink signal for the first subframe, when the first DCI format and the second DCI format are detected in the same subframe; and a step of setting the transmission power for the uplink signal based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format, and independently setting the transmission power based on the power control adjustment value that is obtained by the TPC command which is included in the second DCI format, in a case where the first DCI format schedules the uplink signal for the second subframe, when the first DCI format and the second DCI format are detected in the same subframe.

6 . The communication method according to claim 4 , further comprising:
a step of applying the power control adjustment value that is obtained by the TPC command which is included in the second DCI format, to the transmission power for the uplink signal that is transmitted on the second subframe, without depending on a subframe in which the second DCI format is detected, when only the second DCI format is detected.

7 . An integrated circuit which is built in a terminal device that performs communication with a base station device, and which causes the terminal device to perform:
a function of receiving information relating to a first configuration, information relating to a second configuration, and a downlink control information (DCI) format; and a function of transmitting an uplink signal to the base station device in a case where the uplink signal is scheduled based on the DCI format, wherein, in a case where both of the first configuration and the second configuration are set, the function of transmitting the uplink signal includes
a function of setting transmission power for the uplink signal that is transmitted on an uplink subframe (a first subframe) which belongs to a first subframe set, based on a power control adjustment value that is obtained by a transmit power control (TPC) command which is included in a DCI format (a first DCI format) that is used for the scheduling of the uplink signal or a DCI format (a second DCI format) that is used for transfer of the transmit power control (TPC) command, and
a function of setting the transmission power for the uplink signal that is transmitted on an uplink subframe (a second subframe) which belongs to a second subframe set, based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format.

8 . The integrated circuit according to claim 7 , which causes the terminal device to further perform:
a function of setting the transmission power for the uplink signal, based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format, in a case where the first DCI format schedules the uplink signal for the first subframe, when the first DCI format and the second DCI format are detected in the same subframe; and a function of setting the transmission power for the uplink signal based on the power control adjustment value that is obtained by the TPC command which is included in the first DCI format, and independently setting the transmission power based on the TPC command which is included in the second DCI format, in a case where the first DCI format schedules the uplink signal for the second subframe, when the first DCI format and the second DCI format are detected in the same subframe.

9 . The integrated circuit according to claim 7 , which causes the

Assignees

• Sharp Kk

Inventors

• Ouchi Wataru
• Aiba Tatsushi
• Suzuki Shoichi

Classifications

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W52/54 Primary

  Signalisation aspects of the TPC commands, e.g. frame structure · CPC title

• H04W72/12 Primary

  Wireless traffic scheduling · CPC title

• H04W52/146

  Uplink power control · CPC title

• H04W52/16

  Deriving transmission power values from another channel · CPC title