# US 12,004,086 B2 · Control of terminal-requested power reduction

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- Number: US 12,004,086 B2
- Document ID: US12004086B2
- Status: Granted
- Kind: B2
- Application number: 17/434,743
- Filed: 2020-03-18
- Published: 2022-04-28
- Granted: 2024-06-04
- Earliest claimed: 2019-04-30
- Assignees: Sony Group Corporation
- Applicants: Sony Group Corporation
- Inventors: Kun Zhao; Olof Zander; Rickard Ljung
- Web page: https://patentgrep.com/patent/US12004086B2

## CPC

- H04W 52/146: {Uplink power control}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Method, carried out in a radio terminal (130), for configuring uplink output power of radio transmission from the radio terminal, comprising determining (402) a demand power reduction (P-MPR1) based on a maximum power level associated with a first uplink duty cycle (UDC1); transmitting (403), to a radio network node (120), an indication (233) of the demand power reduction; receiving (404), from the network node, an indication (253) of a target power reduction (P-MPR2) associated with an actual uplink duty cycle (UDC2); and configuring (406) the output power based on the target power reduction.

## Claims

### Claim 1

A method, carried out in a radio network node, for configuring uplink output power of radio transmission from a radio terminal, said method comprising:
determining a demand power reduction based on a maximum power level associated with a first uplink duty cycle;
transmitting, to a radio network node, an indication of the demand power reduction; and
receiving, from the network node, an indication of an actual uplink duty cycle and of a target power reduction associated with the actual uplink duty cycle;
wherein the receiving comprises receiving, from the network node, network scheduling for an uplink transmission of the radio terminal in accordance with the actual uplink duty cycle; and
configuring the output power based on the target power reduction.

### Claim 2 (depends on 1)

The method of claim 1, wherein the target power reduction is different from the demand power reduction.

### Claim 3 (depends on 1)

The method of claim 1, wherein the target power reduction is smaller than the demand power reduction.

### Claim 4 (depends on 3)

The method of claim 3, wherein the actual uplink duty cycle has a lower value than the first uplink duty cycle.

### Claim 5 (depends on 1)

The method of claim 1, wherein the target power reduction is larger than the demand power reduction.

### Claim 6 (depends on 5)

The method of claim 5, wherein the actual uplink duty cycle is different from the first uplink duty cycle.

### Claim 7 (depends on 5)

The method of claim 5, wherein the actual uplink duty cycle has a higher value than the first uplink duty cycle.

### Claim 8 (depends on 1)

The method of claim 1, comprising
transmitting, to the network node, an indication of the first uplink duty cycle.

### Claim 9 (depends on 1)

The method of claim 1, comprising
transmitting spatial relation information for an uplink beam associated with said target power reduction.

### Claim 10 (depends on 1)

The method of claim 1, wherein determining a demand power reduction is carried out for each one of a plurality of uplink beams, wherein said indication of the demand power reduction indicates a power value for each of said plurality of uplink beams.

### Claim 11 (depends on 10)

The method of claim 10, wherein the indication of a target power reduction indicates power value for each of said plurality of uplink beams.

### Claim 12 (depends on 10)

The method of claim 10, wherein said indication of the demand power reduction indicates a beam-specific value for a reference beam and a relative value, associated with the beam-specific value, for another beam among said plurality of uplink beams.

### Claim 13

A method, carried out in a radio network node, for configuring uplink output power of radio transmission from a radio terminal, comprising
receiving, from the radio terminal, an indication of a demand power reduction based on a maximum power level, associated with uplink transmission with a first uplink duty cycle;
determining a target power reduction for the radio terminal;
determining an actual uplink duty cycle associated with the target power reduction associated with the target power reduction;
transmitting, to the radio terminal, an indication of the determined target power reduction to apply by the radio terminal for configuring the output power; and
wherein the transmitting comprises scheduling uplink transmission from the terminal in accordance with the actual uplink duty cycle.

### Claim 14 (depends on 13)

The method of claim 13, wherein the target power reduction is different from the demand power reduction.

### Claim 15 (depends on 13)

The method of claim 13, wherein the target power reduction is smaller than the demand power reduction.

### Claim 16 (depends on 13)

The method of claim 13, wherein the target power reduction is larger than the demand power reduction.

### Claim 17 (depends on 13)

The method of claim 13, wherein
the target power reduction is smaller than the demand power reduction; and
the actual uplink duty cycle has a lower value than the first uplink duty cycle.

### Claim 18 (depends on 13)

The method of claim 13, wherein the target power reduction is larger than the demand power reduction; and
the actual uplink duty cycle has a higher value than the first uplink duty cycle.

### Claim 19 (depends on 13)

The method of claim 13, comprising
receiving spatial relation information for an uplink beam associated with said demand power reduction.

### Claim 20 (depends on 19)

The method of claim 19, wherein the indication of a target power reduction indicates at least one uplink beam for the terminal to use.

### Claim 21 (depends on 13)

The method of claim 13, wherein said indication of the demand power reduction indicates a power value for each of a plurality of uplink beams.

### Claim 22 (depends on 21)

The method of claim 21, wherein said indication of the demand power reduction indicates a beam-specific value for a reference beam and a relative value, associated with the beam-specific value, for another beam among said plurality of uplink beams.

### Claim 23 (depends on 21)

The method of claim 21, wherein the indication of a target power reduction indicates a power value for each of said plurality of uplink beams.

### Claim 24 (depends on 13)

The method of claim 13, wherein the target power reduction and the actual uplink duty cycle are controlled in dependence of each other, such a total transmit power of the terminal remains below a threshold value.

### Claim 25

A radio terminal, comprising:
a radio transceiver,
logic configured to communicate data, via the radio transceiver, with a radio network node, wherein the logic is further configured to
determine a demand power reduction based on a maximum power level, associated with a first uplink duty cycle;
transmit, to a radio network node, an indication of the demand power reduction;
receive, from the network node, an indication of a target power reduction and an actual uplink duty cycle associated with the target power reduction; and
receive, from the network node, network scheduling for an uplink transmission of the radio terminal in accordance with the actual uplink duty cycle; and
configure the output power based on the target power reduction.

### Claim 26

A radio network node, for configuring uplink output power of radio transmission from a radio terminal, comprising:
a radio transceiver,
logic configured to communicate data via the radio transceiver, wherein the logic is configured to
receive, from the radio terminal, an indication of a demand power reduction based on a maximum power level, associated with uplink transmission with a first uplink duty cycle;
determine a target power reduction for the radio terminal;
transmit, to the radio terminal, an indication of the target power reduction to apply by the radio terminal for configuring the output power;
determine, an actual uplink duty cycle associate with the target power reduction; and
schedule, an uplink transmission from the terminal in accordance with the actual uplink duty cycle.