# US 10,321,411 B2 · Terminal apparatus and communication method for setting appropriate uplink transmit power for an uplink signal based on detecing a DCI

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- Number: US 10,321,411 B2
- Document ID: US10321411B2
- Status: Granted
- Kind: B2
- Application number: 15/591,492
- Filed: 2017-05-10
- Published: 2017-08-24
- Granted: 2019-06-11
- Earliest claimed: 2011-08-02
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Wataru Ouchi; Kimihiko Imamura; Yosuke Akimoto; Toshizo Nogami; Daiichiro Nakashima; Kazuyuki Shimezawa; Shoichi Suzuki; Yasuyuki Kato; Katsunari Uemura
- Web page: https://patentgrep.com/patent/US10321411B2

## CPC

- H04W 52/242: {taking into account path loss}
- H04L 5/0073: {Allocation arrangements that take into account other cell interferences}
- H04W 52/146: {Uplink power control}
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- 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
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## 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

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 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.