# US 11,445,446 B2 · Methods and apparatuses for power control

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- Number: US 11,445,446 B2
- Document ID: US11445446B2
- Status: Granted
- Kind: B2
- Application number: 17/280,014
- Filed: 2018-11-09
- Published: 2022-02-03
- Granted: 2022-09-13
- Earliest claimed: 2018-11-09
- Assignees: Lenovo (Beijing) Limited
- Applicants: Lenovo (Beijing) Limited
- Inventors: Hongmei Liu; Lianhai Wu; Haipeng Lei; Zhennian Sun; Zhi Yan
- Web page: https://patentgrep.com/patent/US11445446B2

## CPC

- H04W 52/143: {Downlink power control}
- 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 52/04: Transmission power control [TPC]
- H04W 52/325: {Power control of control or pilot channels}
- H04W 52/36: with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W 52/362: {Aspects of the step size}
- H04W 52/365: {Power headroom reporting}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 52/38: TPC being performed in particular situations
- H04W 52/42: in systems with time, space, frequency or polarisation diversity
- H04W 52/46: in multi-hop networks, e.g. wireless relay networks
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- 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

Methods and apparatuses for power control are disclosed. A method comprises: receiving a first signaling indicating one or multiple power values for a downlink reception from a node, each power value being associated with a spatial domain filter, and determining a power value for the downlink reception from the node.

## Claims

### Claim 1

A method comprising:
receiving a first signaling indicating one or multiple power values for a downlink reception from a node, each power value being associated with a spatial domain filter; and
determining a power value for the downlink reception from the node.

### Claim 2 (depends on 1)

The method of claim 1, wherein the power value is a power offset that indicates that a power level to be reduced, or an absolute transmitting power level, or an absolute receiving power level.

### Claim 3 (depends on 1)

The method of claim 1, wherein the power values associated with one or multiple spatial domain filters are configured by radio resource control signaling or medium access control control element signaling, or any combination thereof.

### Claim 4 (depends on 3)

The method of claim 3, wherein the power value for physical downlink shared channel scheduled by a downlink control information is determined by a transmission configuration indication state in the downlink control information or a default transmission configuration indication state or a default transmission configuration indication state set, and the transmission configuration indication state is used to determine the spatial domain filter.

### Claim 5 (depends on 4)

The method of claim 4, wherein both the default transmission configuration indication state and the default transmission configuration indication state set are selected from a transmission configuration indication state set configured by radio resource control signaling or medium access control control element signaling or downlink control information 2_0 or downlink control information 2_2 or downlink control information 2_3 or any combination thereof.

### Claim 6 (depends on 4)

The method of claim 4, wherein the power value for physical downlink shared channel is based on the smallest or the largest value among power values for all the transmission configuration indication states in the default transmission configuration indication state set.

### Claim 7 (depends on 3)

The method of claim 3, wherein the power value for physical downlink control channel or for channel-state information reference signal is determined by a transmission configuration indication state in radio resource control signaling or medium access control control element signaling or any combination thereof.

### Claim 8 (depends on 1)

The method of claim 1, wherein the power values associated with or one or multiple spatial domain filters are indicated by downlink control information 2_0 or downlink control information 2_2 or downlink control information 2_3, and the starting position of the power value for a specific spatial domain filter in downlink control information 2_0 or downlink control information 2_2 or downlink control information 2_3 is configured by radio resource control signaling.

### Claim 9 (depends on 1)

The method of claim 1, wherein both the power value and the transmission configuration indication state corresponding to the spatial domain filter are indicated in downlink control information to determine the power value for scheduled physical downlink shared channel.

### Claim 10 (depends on 9)

The method of claim 9, wherein the number of bits for power value indication in the downlink control information is configured by radio resource control signaling.

### Claim 11

A method comprising:
receiving a first signaling indicating a set of reference signal resources, wherein each reference signal resource corresponds to a spatial domain filter;
receiving a second signaling indicating reporting for power values for all of or part of reference signal resources contained in the set of reference signal resources; and
reporting power value for at least one of the reference signal resources.

### Claim 12 (depends on 11)

The method of claim 11, wherein the reference signal resource is a channel-state information reference signal resource and/or a synchronization signal block resource.

### Claim 13 (depends on 11)

The method of claim 11, wherein the power value is a power offset, or a downlink transmission power or a downlink reception power.

### Claim 14 (depends on 11)

The method of claim 11, wherein both the power value and the corresponding resource index are reported.

### Claim 15 (depends on 11)

The method of claim 11, wherein a plurality of power values are reported, and each power value is reported as an absolute power value or a differential power value.

### Claim 16 (depends on 12)

The method of claim 12, wherein in the condition that a channel-state information reference signal resource and a synchronization signal block resource correspond to the same spatial domain filter, the power value is determined by both the channel-state information reference signal resource and the synchronization signal block resource.

### Claim 17

An apparatus comprising:
a receiver that receives a first signaling indicating a set of reference signal resources, wherein each reference signal resource corresponds to a spatial domain filter, and receives a second signaling indicating reporting for power values for all of or part of reference signal resources contained in the set of reference signal resources; and
a transmitter that reports power value for at least one of the reference signal resources.

### Claim 18 (depends on 17)

The apparatus of claim 17, wherein the reference signal resource is a channel-state information reference signal resource and/or a synchronization signal block resource.

### Claim 19 (depends on 17)

The apparatus of claim 17, wherein the power value is a power offset, or a downlink transmission power or a downlink reception power.

### Claim 20 (depends on 17)

The apparatus of claim 17, wherein both the power value and the corresponding resource index are reported.