# US 10,455,524 B2 · Uplink transmission power determination method and wireless device

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- Number: US 10,455,524 B2
- Document ID: US10455524B2
- Status: Granted
- Kind: B2
- Application number: 15/556,605
- Filed: 2016-03-31
- Published: 2018-02-15
- Granted: 2019-10-22
- Earliest claimed: 2015-03-31
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Suhwan Lim; Yoonoh Yang; Sangwook Lee; Manyoung Jung; Jinyup Hwang
- Web page: https://patentgrep.com/patent/US10455524B2

## CPC

- H04W 52/30: using constraints in the total amount of available transmission power
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 27/34: Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04W 52/14: Separate analysis of uplink or downlink
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 52/146: {Uplink power control}
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- 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)

## Abstract

A disclosure of the present specification provides a method for determining uplink transmission power by a wireless device. The transmission power determination method may comprise the steps of: determining whether transmission of uplink data uses 64 quadrature amplitude modulation (QAM) or not; determining whether transmission of the uplink data corresponds to multi-clustered transmission or not; determining whether transmission of the uplink data is to be performed through a single carrier or is to be performed through a plurality of carriers according to carrier aggregation; and determining a maximum power reduction (MPR) value, which is to be applied to transmission of the uplink data, according to the determination results. Here, when transmission of the uplink data uses the 64 QAM, corresponds to the multi-clustered transmission, and is performed through the single carrier, a first MPR value may be determined; and, when transmission of the uplink data uses the 64 QAM, corresponds to the multi-clustered transmission, and is performed through the plurality of carriers, a second MPR value may be determined.

## Claims

### Claim 1

A method for determining an uplink transmission power, the method performed by a user equipment (UE) and comprising:
determining a maximum power reduction (MPR) value based on:
whether 64 QAM (Quadrature Amplitude Modulation) is used for uplink data transmission,
whether multi-clustered transmission is used for the uplink data transmission, and
whether a single carrier is used for the uplink data transmission or a plurality of carriers using carrier aggregation (CA) is used for the uplink data transmission;
determining the uplink transmission power based on the MPR value;
transmitting uplink data based on the uplink transmission power,
wherein based on that the 64 QAM, the multi-clustered transmission, and the single carrier are used for the uplink data transmission, a first MPR value is determined as the MPR value to be applied to the uplink data transmission,
wherein based on that the 64 QAM, the multi-clustered transmission, and the plurality of carriers are used for the uplink data transmission, a second MPR value is determined as the MPR value to be applied to the uplink data transmission,
wherein the first MPR value is determined based on CEIL {MA, 0.5},
wherein, MA=10.0, ; 0<A≤0.1
11.75-17.5A, ; 0.1<A≤0.5
3.6-1.2A, ; 0.5<A≤1.0
wherein A=NRB_alloc/NRB_agg, and
wherein NRB_agg represents a number of RBs in a channel band, NRB_alloc represents a total number of RBs transmitted simultaneously, and CEIL {MA, 0.5} represents a function that rounds off MA on a per-0.5 dB basis.

### Claim 2 (depends on 1)

The method of claim 1, wherein each of the first and second MPR values is in a range of 2.0 dB to 10.0 dB based on a resource block allocation ratio.

### Claim 3 (depends on 1)

The method of claim 1, wherein the second MPR value is determined based on CEIL {MA, 0.5},
wherein, MA=10.0, ; 0<A≤0.16
12.3-23.3A, ; 0.16<A≤0.4
3.67-1.67A, ; 0.4<A≤1.0.

### Claim 4 (depends on 1)

The method of claim 1, wherein based on that the 64 QAM, and the single-clustered transmission are used for the uplink data transmission, a MPR value to be applied for transmission of the uplink data using 16 QAM is determined as the MPR value to be applied to the uplink data transmission using the 64 QAM.

### Claim 5 (depends on 1)

The method of claim 1, wherein the first MPR and second MPR values has a power reduction level larger than a MPR value to be applied for transmission of the uplink data using 16 QAM.

### Claim 6 (depends on 1)

The method of claim 1, wherein based on the plurality of carriers being aggregated via the carrier aggregation, a maximum bandwidth of the plurality of carriers is 40 MHz.

### Claim 7

A user equipment (UE) for determining an uplink transmission power, the UE comprising:
a transceiver for transmitting and receiving a wireless signal; and
a processor operatively connected to the transceiver, wherein the processor is configured to:
determining a maximum power reduction (MPR) value based on whether 64 QAM (Quadrature Amplitude Modulation) is used for uplink data transmission, whether multi-clustered transmission is used for the uplink data transmission, and whether a single carrier is used for the uplink data transmission or a plurality of carriers using carrier aggregation (CA) is used for the uplink data transmission;
determine the uplink transmission power based on the MPR value;
control the transceiver to transmit uplink data based on the uplink transmission power,
wherein based on that the 64 QAM, the multi-clustered transmission, and the single carrier are used for the uplink data transmission, a first MPR value is determined as the MPR value to be applied to the uplink data transmission,
wherein based on that the 64 QAM, the multi-clustered transmission, and the plurality of carriers are used for the uplink data transmission, a second MPR value is determined as the MPR value to be applied to the uplink data transmission,
wherein the first MPR value is determined based on CEIL {MA, 0.5},
wherein, MA=10.0, ; 0<A≤0.1
11.75-17.5A, ; 0.1<A≤0.5
3.6-1.2A, ; 0.5<A≤1.0
wherein A=NRB_alloc/NRB_agg, and
wherein NRB_agg represents a number of RBs in a channel band, NRB_alloc represents a total number of RBs transmitted simultaneously, and CEIL {MA, 0.5} represents a function that rounds off MA on a per-0.5 dB basis.

### Claim 8 (depends on 7)

The UE of claim 7, wherein each of the first and second MPR values is in a range of 2.0 dB to 10.0 dB based on a resource block allocation ratio.

### Claim 9 (depends on 7)

The UE of claim 7, wherein the second MPR value is determined based on CEIL {MA, 0.5},
wherein, MA=10.0, ; 0<A≤0.16
12.3-23.3A, ; 0.16<A≤0.4
3.67-1.67A, ; 0.4<A≤1.0.

### Claim 10 (depends on 7)

The UE of claim 7, wherein, based on that the 64 QAM, and a single-clustered transmission are used for the uplink data transmission, a MPR value to be applied for transmission of the uplink data using 16 QAM is determined as the MPR value to be applied to the uplink data transmission using the 64 QAM.

### Claim 11 (depends on 7)

The UE of claim 7, wherein the first MPR and second MPR values has a power reduction level larger than a MPR value to be applied for transmission of the uplink data using 16 QAM.

### Claim 12 (depends on 7)

The UE of claim 7, wherein, based the plurality of carriers being aggregated via the carrier aggregation, a maximum bandwidth of the plurality of carriers is 40 MHz.