Method and apparatus for transmitting and receiving power headroom information in wireless communication system

Patent metadata

Field	Value
Publication number	US-11985656-B2
Application number	US-201917298350-A
Country	US
Kind code	B2
Filing date	Nov 28, 2019
Priority date	Nov 28, 2018
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

A wireless communication system and, more particularly, a method and an apparatus therefor, the method including the steps of: triggering power headroom reporting at a first time point; determining power headroom (PH) information of a cell on the basis of actual transmission or a reference format, on the basis of an uplink (UL) scheduling status; and transmitting the PH information of the cell at a second time point, via a configured grant based physical uplink shared channel (PUSCH), wherein the UL scheduling status includes downlink control information reception from the first time point to a third time point which exists before the second time point, and a time interval between the third time point and the second time point is determined on the basis of a PUSCH processing time.

First claim

What is claimed is:

1. A method of transmitting a signal by an apparatus in a wireless communication system, the method comprising:
triggering a power headroom report (PHR) at a first time point;
determining power headroom (PH) information about a cell based on an actual transmission or a reference format based on an uplink (UL) scheduling state; and
transmitting the PH information about the cell on a configured grant (CG)-based physical uplink shared channel (PUSCH) at a second time point,
wherein the UL scheduling state includes reception of downlink control information from the first time point to a third time point before the second time point, and a time interval between the third time point and the second time point is determined based on a PUSCH preparation time,
wherein the PUSCH preparation time satisfies A*2 −u where A is a positive number based on a PUSCH timing capability and u is one of (uDL, uUL), which maximizes the PUSCH preparation time, and
wherein uDL is related to a subcarrier spacing (SCS) of an active downlink (DL) bandwidth part (BWP) of a scheduling cell for the CG-based PUSCH, uUL is related to an SCS applied to the CG-based PUSCH, and the SCSs satisfy 15*2 u KHz.

2. The method according to claim 1 , wherein A*2 −u satisfies (N 2 +d 2,1 )(2048+144)*k* 2 −u *Tc, N 2 represents the number of symbols based on the PUSCH timing capability, d 2,1 is 0 or 1, k is 64, and Tc is 1/(480*10 3 *4096).

3. The method according to claim 1 , wherein the cell is an activated cell.

4. The method according to claim 1 , wherein the cell is different from a cell in which the CG-based PUSCH is transmitted.

5. The method according to claim 1 , wherein the UL scheduling state further includes a sound reference signal (SRS) scheduling state.

6. An apparatus configured to operate in a wireless communication system, the apparatus comprising:
a memory; and
a processor,
wherein the processor is configured to perform operations comprising:
triggering a power headroom report (PHR) at a first time point,
determining power headroom (PH) information about a cell based on an actual transmission or a reference format based on an uplink (UL) scheduling state, and
transmitting the PH information about the cell on a configured grant (CG)-based physical uplink shared channel (PUSCH) at a second time point,

wherein the UL scheduling state includes reception of downlink control information from the first time point to a third time point before the second time point, and a time interval between the third time point and the second time point is determined based on a PUSCH preparation time,
wherein the PUSCH preparation time satisfies A*2 −u where A is a positive number based on a PUSCH timing capability and u is one of (uDL, uUL), which maximizes the PUSCH preparation time, and
wherein uDL is related to a subcarrier spacing (SCS) of an active downlink (DL) bandwidth part (BWP) of a scheduling cell for the CG-based PUSCH, uUL is related to an SCS applied to the CG-based PUSCH, and the SCSs satisfy 15*2 u KHz.

7. The apparatus according to claim 6 , wherein A*2 −u satisfies (N 2 +d 2,1 )(2048+144)*k* 2 −u *Tc, N 2 represents the number of symbols based on the PUSCH timing capability, d 2,1 is 0 or 1, k is 64, and Tc is 1/(480*10 3 *4096).

8. The apparatus according to claim 6 , wherein the cell is an activated cell.

9. The apparatus according to claim 6 , wherein the cell is different from a cell in which the CG-based PUSCH is transmitted.

10. The apparatus according to claim 6 , wherein the UL scheduling state further includes a sound reference signal (SRS) scheduling state.

11. The apparatus according to claim 6 , wherein the apparatus includes an autonomous driving vehicle communicable with at least a user equipment (UE), a network, and another autonomous driving vehicle other than the apparatus.

Assignees

• Lg Electronics Inc

Inventors

• Ahn Joonkui
• Yang Suckchel
• Lee Hanul
• Lee Sunyoung

Classifications

• H04W72/1268 Primary

  of uplink data flows · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L27/26025

  Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003) · CPC title

• H04W52/365

  Power headroom reporting · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title