# US 12,015,987 B2 · Power headroom reports assuming half duplex and/or full duplex

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- Number: US 12,015,987 B2
- Document ID: US12015987B2
- Status: Granted
- Kind: B2
- Application number: 17/491,353
- Filed: 2021-09-30
- Published: 2022-04-07
- Granted: 2024-06-18
- Earliest claimed: 2020-10-02
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Qian Zhang; Yan Zhou; Junyi Li; Navid Abedini; Tao Luo
- Web page: https://patentgrep.com/patent/US12015987B2

## CPC

- H04W 52/365: {Power headroom reporting}
- H04L 5/1423: {for simultaneous baseband signals}
- H04L 5/16: Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission}
- H04W 52/146: {Uplink power control}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- 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

Certain aspects of the present disclosure provide techniques for wireless communications. An example method generally includes calculating a first power headroom report (PHR) for a half duplex (HD) operating mode, calculating a second PHR for a full duplex (FD) operating mode during which maximum uplink transmit power is subject to one or more self-interference constraints, determining whether to report the first PHR, the second PHR, or both, and reporting at least one of the first PHR or the second PHR to a network entity, in accordance with the determination.

## Claims

### Claim 1

A method for wireless communications by a user equipment (UE), comprising:
calculating a first power headroom report (PHR) for a half duplex (HD) operating mode;
calculating a second PHR for a full duplex (FD) operating mode during which maximum uplink transmit power is subject to one or more self-interference constraints;
determining whether to report the first PHR, the second PHR, or both; and
reporting at least one of the first PHR or the second PHR to a network entity, in accordance with the determination.

### Claim 2 (depends on 1)

The method of claim 1, wherein the determination is based on an indication from the network entity.

### Claim 3 (depends on 2)

The method of claim 2, wherein the indication is provided via at least one of a radio resource control (RRC) message, a medium access control (MAC) control element (MAC-CE), or a downlink control information (DCI) signaling.

### Claim 4 (depends on 1)

The method of claim 1, wherein the determination is based on one or more PHR reporting rules defined in a standard specification.

### Claim 5 (depends on 1)

The method of claim 1, wherein the determination is based on resources allocated per HD mode and FD mode.

### Claim 6 (depends on 5)

The method of claim 5, wherein the determination is to, at least one of:
report the first PHR in slots of the resources allocated for the HD operating mode; or
report the second PHR in slots of the resources allocated for the FD operating mode.

### Claim 7 (depends on 1)

The method of claim 1, wherein:
the determination is to report either the first PHR or the second PHR; and
the method further comprising including, in the report, a mode flag indicating an operating mode for the reported PHR.

### Claim 8 (depends on 1)

The method of claim 1, wherein:
the determination is to report both the first PHR and the second PHR regardless of whether a current operating mode is FD or HD.

### Claim 9 (depends on 1)

The method of claim 1, wherein the determination is to:
report the first PHR as a default report; and
report the second PHR only when at least one conditions is met.

### Claim 10 (depends on 9)

The method of claim 9, wherein the second PHR is reported as a value of a difference between the first PHR and the second PHR.

### Claim 11 (depends on 10)

The method of claim 10, further comprising:
receiving a threshold value via at least one of a radio resource control (RRC) message, a medium access control (MAC) control element (MAC-CE), or a downlink control information (DCI) signaling, wherein:
the condition is that the value is equal to or above the threshold value.

### Claim 12 (depends on 10)

The method of claim 10, wherein the condition is that in a current slot, resources are allocated for the FD operating mode.

### Claim 13 (depends on 1)

The method of claim 1, further comprising, if the second PHR indicates a value that is equal to or less than a threshold value, sending, to a network entity, a request to abort the FD operating mode.

### Claim 14

An apparatus for wireless communications by a user equipment (UE), comprising:
memory; and
at least one processor coupled with the memory and configured to:
calculate a first power headroom report (PHR) for a half duplex (HD) operating mode;
calculate a second PHR for a full duplex (FD) operating mode during which maximum uplink transmit power is subject to one or more self-interference constraints;
determine whether to report the first PHR, the second PHR, or both; and
report at least one of the first PHR or the second PHR to a network entity, in accordance with the determination.