# US 11,122,524 B2 · Reporting power headroom

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- Number: US 11,122,524 B2
- Document ID: US11122524B2
- Status: Granted
- Kind: B2
- Application number: 16/724,011
- Filed: 2019-12-20
- Published: 2020-06-25
- Granted: 2021-09-14
- Earliest claimed: 2018-12-21
- Assignees: Lenovo (Singapore) Pte. Ltd.
- Applicants: Lenovo (Singapore) PTE. LTD.
- Inventors: Joachim Loehr; Alexander Johann Maria Golitschek Edler von Elbwart; Prateek Basu Mallick; Ravi Kuchibhotla
- Web page: https://patentgrep.com/patent/US11122524B2

## CPC

- H04W 52/365: {Power headroom reporting}
- H04W 52/40: during macro-diversity or soft handoff
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Apparatuses, methods, and systems are disclosed for reporting power headroom. One apparatus includes a processor that identifies a transmission occasion for AUL transmission on an unlicensed serving cell and generates a PHR MAC CE. The apparatus includes a transceiver that transmits the PHR MAC CE with an AUL transmission to a RAN node in the mobile communication network, wherein transmitting the PHR MAC CE includes indicating timing information corresponding to the PHR.

## Claims

### Claim 1

A method of a user equipment (“UE”) for power headroom reporting in a mobile communication network, the method comprising:
identifying a transmission occasion for autonomous uplink (“AUL”) transmission on an unlicensed serving cell;
generating a power headroom report (“PHR”) Medium Access Control (“MAC”) Control Element (“CE”); and
transmitting the PHR MAC CE with an AUL transmission to a radio access network (“RAN”) node in the mobile communication network,
wherein transmitting the PHR MAC CE comprises indicating timing information corresponding to the PHR, wherein the timing information indicates a time when the power headroom information was generated.

### Claim 2 (depends on 1)

The method of claim 1, wherein the timing information provides information to the RAN node on a first transmission attempt of the PHR MAC CE.

### Claim 3 (depends on 1)

The method of claim 1, wherein the timing information comprises a one-bit flag, wherein a first value of the one-bit flag indicates that the PHR MAC CE transmission corresponds to a first transmission attempt and a second value of the one-bit flag indicates that the PHR MAC CE transmission corresponds to a subsequent transmission attempt.

### Claim 4 (depends on 1)

The method of claim 1, wherein the timing information comprises an indication of a timing offset between the PHR MAC CE transmission and a first transmission attempt.

### Claim 5 (depends on 1)

The method of claim 1, wherein the timing information is transmitted as part of uplink control information and is encoded separately from the PHR.

### Claim 6

A user equipment (“UE”) apparatus for power headroom reporting in a mobile communication network, the apparatus comprising:
a processor that:
identifies a transmission occasion for autonomous uplink (“AUL”) transmission on an unlicensed serving cell, and
generates a power headroom report (“PHR”) Medium Access Control (“MAC”) Control Element (“CE”); and
a transceiver that transmits the PHR MAC CE with an AUL transmission to a radio access network (“RAN”) node in the mobile communication network,
wherein transmitting the PHR MAC CE comprises indicating timing information corresponding to the PHR, wherein the timing information indicates a time when the power headroom information was generated.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein the timing information provides information to the RAN node on a first transmission attempt of the PHR MAC CE.

### Claim 8 (depends on 6)

The apparatus of claim 6, wherein the timing information comprises a one-bit flag, wherein a first value of the one-bit flag indicates that the PHR MAC CE transmission corresponds to a first transmission attempt and a second value of the one-bit flag indicates that the PHR MAC CE transmission corresponds to a subsequent transmission attempt.

### Claim 9 (depends on 6)

The apparatus of claim 6, wherein the timing information comprises an indication of a timing offset between the PHR MAC CE transmission and a first transmission attempt.

### Claim 10 (depends on 6)

The apparatus of claim 6, wherein the timing information is transmitted as part of uplink control information and is encoded separately from the PHR.