TERMINAL DEVICE, METHOD, AND INTEGRATED CIRCUIT

• US 20160165547A1
• Filed: 07/10/2014
• Published: 06/09/2016
• Est. Priority Date: 07/12/2013
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: OUCHI, Wataru, AIBA, Tatsushi, SUZUKI, Shoichi
• Granted Patent: US 9,565,641 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment

Abstract

Provided is a terminal device configured to communicate with a base station device, the terminal device being configured to: transmission power for transmission of a physical uplink shared channel in a subframe belonging to a first subframe set, based on a first parameter and a third parameter relating to power control adjustment; set transmission power for transmission of a physical uplink shared channel in a subframe belonging to a second subframe set, based on a second parameter and a fourth parameter relating to the power control adjustment; reset a value of the third parameter in a case that accumulation is enabled, and a random access response is received; and reset a value of the third parameter in a case that the accumulation is enabled, and a value of the first parameter is changed.

Claims

1. A terminal device configured to communicate with a base station device, the terminal device comprising:

reception circuitry configured and/or programmed to receive information that indicates a subframe in a first subframe set and a subframe in a second subframe set, information that indicates a first parameter for the first subframe set, and information that indicates a second parameter for the second subframe set; and

transmission circuitry configured and/or programmed to

set transmission power for transmission of a physical uplink shared channel in a subframe belonging to the first subframe set, based on the first parameter and a third parameter relating to power control adjustment,

set transmission power for transmission of a physical uplink shared channel in a subframe belonging to the second subframe set, based on the second parameter and a fourth parameter relating to the power control adjustment,

reset a value of the third parameter in a case that accumulation is enabled, and a random access response is received,

reset a value of the third parameter in a case that the accumulation is enabled, and a value of the first parameter is changed, and

reset a value of the fourth parameter in a case that the accumulation is enabled, and a value of the second parameter is changed.

2. The terminal device according to claim 1, wherein

the transmission circuitry is configured to, in the case that the accumulation is enabled,

calculate the value of the third parameter by accumulating a correction value indicated by a transmit power control command which corresponds to the subframe belonging to the first subframe set, and

calculate the value of the fourth parameter by accumulating a correction value indicated by a transmit power control command which corresponds to the subframe belonging to the second subframe set.

3. The terminal device according to claim 1, wherein

the transmission circuitry is configured to set an initial value for the third parameter, based on a parameter relating to power adjustment for transmission of a random access preamble, in a case that the value of the third parameter is reset by receiving the random access response message,

the transmission circuitry is configured to set the initial value for the third parameter to 0, in a case that the value of the third parameter is reset by the value of the first parameter being changed, and

the transmission circuitry is configured to set an initial value for the fourth parameter to 0, in a case that the value of the fourth parameter is reset by the value of the second parameter being changed.

4. The terminal device according to claim 2, wherein

the transmission circuitry is configured not to accumulate the correction value for the third parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the third parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the first subframe set exceeds a maximum transmission power set to the terminal device, and

the transmission circuitry is configured not to accumulate the correction value for the fourth parameter, in a case that the transmission power based on the value of the fourth parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the second subframe set exceeds the maximum transmission power set to the terminal device.

5. The terminal device according to claim 2, wherein

the transmission circuitry is configured not to accumulate the correction value for the third parameter, in a case that the transmission power based on the value of the third parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the first subframe set is equal to or smaller than a minimum transmission power, and

the transmission circuitry is configured not to accumulate the correction value for the fourth parameter, in a case that the transmission power based on the value of the fourth parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the second subframe set is equal to or smaller than the minimum transmission power.

6. A method to be used by a terminal device configured to communicate with a base station device, the method comprising:

receiving information that indicates a subframe in a first subframe set and a subframe in a second subframe set, information that indicates a first parameter for the first subframe set, and information that indicates a second parameter for the second subframe set;

setting transmission power for transmission of a physical uplink shared channel in a subframe belonging to the first subframe set, based on the first parameter and a third parameter relating to power control adjustment;

setting transmission power for transmission of a physical uplink shared channel in a subframe belonging to the second subframe set, based on the second parameter and a fourth parameter relating to the power control adjustment;

resetting a value of the third parameter in a case that accumulation is enabled, and a random access response message is received;

resetting a value of the third parameter in a case that the accumulation is enabled, and a value of the first parameter is changed; and

resetting a value of the fourth parameter in a case that the accumulation is enabled, and a value of the second parameter is changed.

7. The method according to claim 6, further comprising:

in the case that the accumulation is enabled, calculating the value of the third parameter by accumulating a correction value indicated by a transmit power control command which corresponds to the subframe belonging to the first subframe set; and

in the case that the accumulation is enabled, calculating the value of the fourth parameter by accumulating a correction value indicated by a transmit power control command which corresponds to the subframe belonging to the second subframe set.

8. The method according to claim 6, further comprising:

setting an initial value for the third parameter, based on a parameter relating to power adjustment for transmission of a random access preamble, in a case that the value of the third parameter is reset by receiving the random access response message;

setting the initial value for the third parameter to 0, in a case that the value of the third parameter is reset by the value of the first parameter being changed; and

setting an initial value for the fourth parameter to 0, in a case that the value of the fourth parameter is reset by the value of the second parameter being changed.

9. The method according to claim 7, further comprising:

not accumulating the correction value for the third parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the third parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the first subframe set exceeds a maximum transmission power set to the terminal device; and

not accumulating the correction value for the fourth parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the fourth parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the second subframe set exceeds the maximum transmission power set to the terminal device.

10. The method according to claim 7, further comprising:

not accumulating the correction value for the third parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the third parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the first subframe set is equal to or smaller than a minimum transmission power; and

not accumulating the correction value for the fourth parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the fourth parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the second subframe set is equal to or smaller than the minimum transmission power.

11. An integrated circuit to be mounted on a terminal device configured to communicate with a base station device, the integrated circuit being configured to cause the terminal device to perform at least:

setting a subframe in a first subframe set and a subframe in a second subframe set, based on information that indicates the subframe in the first subframe set and the subframe in the second subframe set;

setting transmission power for transmission of a physical uplink shared channel in a subframe belonging to the first subframe set, based on a first parameter for the first subframe set and a third parameter relating to power control adjustment;

setting transmission power for transmission of a physical uplink shared channel in a subframe belonging to the second subframe set, based on a second parameter for the second subframe set and a fourth parameter relating to the power control adjustment;

resetting a value of the third parameter in a case that accumulation is enabled, and a random access response message is received;

resetting the value of the third parameter a case that the accumulation is enabled, and a value of the first parameter is changed; and

retting a value of the fourth parameter in a case that the accumulation is enabled, and a value of the second parameter is changed.

12. The integrated circuit according to claim 11, wherein the integrated circuit is configured to cause the terminal device to further perform:

in the case that the accumulation is enabled, calculating the value of the third parameter by accumulating a correction value indicated by a transmit power control command which corresponds to the subframe belonging to the first subframe set; and

in the case that the accumulation is enabled, calculating the value of the fourth parameter by accumulating a correction value indicated by a transmit power control command which corresponds to the subframe belonging to the second subframe set.

13. The integrated circuit according to claim 11, wherein the integrated circuit is configured to cause the terminal device to further perform:

setting an initial value for the third parameter, based on a parameter relating to power adjustment for transmission of a random access preamble, in a case that the value of the third parameter reset by receiving the random access response message;

setting the initial value for the third parameter to 0, in a case that the value of the third parameter is reset by the value of the first parameter being changed; and

setting an initial value for the fourth parameter to 0, in a case that the value of the fourth parameter is reset by the value of the second parameter being changed.

14. The integrated circuit according to claim 12, wherein the integrated circuit is configured to cause the terminal device to further perform:

not accumulating the correction value for the third parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the third parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the first subframe set exceeds a maximum transmission power set to the terminal device; and

not accumulating the correction value for the fourth parameter, in a case that the accumulation is enabled, and the transmission power that is based on the value of the fourth parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the second subframe set exceeds the maximum transmission power set to the terminal device.

15. The integrated circuit according to claim 12, wherein the integrated circuit is configured to cause the terminal device to further perform:

not accumulating the correction value for the third parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the third parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the first subframe set is equal to or smaller than a minimum transmission power; and

not accumulating the correction value for the fourth parameter, in a case that the accumulation is enabled, and the transmission power based on the value of the fourth parameter calculated by accumulating the correction value indicated by the transmit power control command which corresponds to the subframe belonging to the second subframe set is equal to or smaller than the minimum transmission power.