Terminal apparatus and communication method for setting appropriate uplink transmit power for an uplink signal based on detecing a DCI

• US 10,321,411 B2
• Filed: 05/10/2017
• Issued: 06/11/2019
• Est. Priority Date: 08/02/2011
• 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, Imamura, Kimihiko, Akimoto, Yosuke, Nogami, Toshizo, Nakashima, Daiichiro, Shimezawa, Kazuyuki, Suzuki, Shoichi, Kato, Yasuyuki, Uemura, Katsunari
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): Van Roie, Justin T
• Application Number:
  US15/591,492
• Publication Number:
  US 20170245220A1
• Time in Patent Office: 762 Days
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A terminal apparatus for communication with a base station apparatus includes reception circuitry and a transmission circuitry. The reception circuitry receives a higher layer signal and sets first and second parameter sets for an uplink power control. The transmission circuitry transmits an uplink signal. If a cell of a first base station and a cell of a second base station are configured, the transmission circuitry sets a transmit power for the uplink signal based on the first parameter set upon detecting a DCI format from the first base station and sets transmit power based on the second parameter set upon detecting a DCI format from the second base station.

Claims

1. A terminal apparatus comprising:

reception circuitry configured to receive, via a higher layer signal, a first parameter set for uplink power control and a second parameter set for the uplink power control; and

transmission circuitry configured to transmit an uplink signal including at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a sounding reference signal (SRS);

wherein,

in a case that a first cell of a first base station and a second cell of a second base station are configured, the transmission circuitry is further configured to;

set a transmit power for the uplink signal based on the first parameter set, in a first case that the reception circuitry receives a first downlink control information (DCI) format from the first base station; and

set the transmit power based on the second parameter set, in a second case that the reception circuitry receives a second DCI format from the second base station, and

each of the first parameter set and the second parameter set includes at least a first type parameter for the PUSCH, a second type parameter for the PUCCH, and a third type parameter for the SRS.

2. The terminal apparatus according to claim 1, wherein

each of the first parameter set and the second parameter set includes at least a nominal power for the uplink signal.

3. The terminal apparatus according to claim 1, wherein

the transmission circuitry is configured to set the transmit power based further on a first pathloss in the first case, the first pathloss determined from a first received power of a first measurement target from the first base station, and

set the transmit power based further on a second pathloss in the second case, the second pathloss determined from a second received power of a second measurement target from the second base station.

4. A communication method for a terminal apparatus comprising:

receiving, via a higher layer signal, a first parameter set for uplink power control and a second parameter set for the uplink power control;

transmitting an uplink signal including at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a sounding reference signal (SRS); and

in a case that a first cell of a first base station and a second cell of a second base station are configured,

setting a transmit power for the uplink signal based on the first parameter set, in a first case of receiving a first downlink control information (DCI) format from the first base station, and

setting the transmit power based on the second parameter set, in a second case of receiving a second DCI format from the second base station,

wherein each of the first parameter set and the second parameter set includes at least a first type parameter for the PUSCH, a second type parameter for the PUCCH, and a third type parameter for the SRS.