Default power headroom report rules

Patent metadata

Field	Value
Publication number	US-12587974-B2
Application number	US-202318384016-A
Country	US
Kind code	B2
Filing date	Oct 26, 2023
Priority date	Apr 26, 2021
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A method includes transmitting, by a wireless device and via a serving cell with a first physical cell index (PCI), a first power headroom report (PHR) of the serving cell and a second PHR of a non-serving cell with a second PCI. The first PHR of the serving cell is determined based on a first pathloss reference signal. The second PHR of the non-serving cell with the second PCI is different from the first PCI of the serving cell. The second PHR of the non-serving cell with the second PCI is determined based on a second pathloss reference signal.

First claim

What is claimed is:

1 . A method comprising:
transmitting, by a wireless device and via a serving cell with a first physical cell index (PCI):
a first power headroom report (PHR), of the serving cell, determined based on a first pathloss reference signal; and
a second PHR, of a non-serving cell with a second PCI different from the first PCI of the serving cell, determined based on a second pathloss reference signal.

2 . The method of claim 1 , further comprising:
triggering, by the wireless device, the first PHR for the serving cell with the first PCI; and triggering, by the wireless device, the second PHR for the non-serving cell with the second PCI.

3 . The method of claim 1 , wherein:
the transmitting the first PHR is in a first physical uplink shared channel (PUSCH) transmission; and the transmitting the second PHR is in a second PUSCH transmission.

4 . The method of claim 1 , wherein:
the first PHR comprises a first field indicating at least one of:
the first PCI; or
the serving cell; and
the second PHR comprises a second field indicating at least one of:
the second PCI; or
the non-serving cell.

5 . The method of claim 1 , further comprising receiving one or more messages comprising one or more configuration parameters for the serving cell; and
wherein the one or more configuration parameters indicate:
a first pathloss reference signal index, for the first pathloss reference signal, that is lowest in a first set of pathloss reference signals associated with the first PCI; and
a second pathloss reference signal index, for the second pathloss reference signal, that is lowest in a second set of pathloss reference signals associated with the second PCI.

6 . The method of claim 1 , wherein at least one of the first pathloss reference signal or the second pathloss reference signal is a synchronization signal block (SSB).

7 . The method of claim 1 , wherein at least one of the first pathloss reference signal or the second pathloss reference signal is a channel-state-information reference signal (CSI-RS).

8 . A method comprising:
receiving, by a base station from a wireless device and via a serving cell with a first physical cell index (PCI):
a first power headroom report (PHR), for the serving cell, based on a first pathloss reference signal; and
a second PHR, for a non-serving cell with a second PCI different from the first PCI of the serving cell, based on a second pathloss reference signal.

9 . The method of claim 8 , wherein:
the first PHR is received in a first physical uplink shared channel (PUSCH) transmission; and the second PHR is received in a second PUSCH transmission.

10 . The method of claim 8 , wherein:
the first PHR comprises a first field indicating at least one of:
the first PCI; or
the serving cell; and
the second PHR comprises a second field indicating at least one of:
the second PCI; or
the non-serving cell.

11 . The method of claim 8 , further comprising transmitting, to the wireless device, one or more messages comprising one or more configuration parameters for the serving cell.

12 . The method of claim 11 , wherein the one or more configuration parameters indicate:
a first pathloss reference signal index, for the first pathloss reference signal, that is lowest in a first set of pathloss reference signals associated with the first PCI; and a second pathloss reference signal index, for the second pathloss reference signal, that is lowest in a second set of pathloss reference signals associated with the second PCI.

13 . The method of claim 8 , wherein at least one of the first pathloss reference signal or the second pathloss reference signal is a synchronization signal block (SSB).

14 . The method of claim 8 , wherein at least one of the first pathloss reference signal or the second pathloss reference signal is a channel-state-information reference signal (CSI-RS).

15 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:
transmit, via a serving cell with a first physical cell index (PCI):
a first power headroom report (PHR), of the serving cell, determined based on a first pathloss reference signal; and
a second PHR, of a non-serving cell with a second PCI different from the first PCI of the serving cell, determined based on a second pathloss reference signal.

16 . The non-transitory computer-readable medium of claim 15 , wherein the instructions further cause the wireless device to:
trigger the first PHR for the serving cell with the first PCI; and trigger the second PHR for the non-serving cell with the second PCI.

17 . The non-transitory computer-readable medium of claim 15 , wherein:
the transmitting the first PHR is in a first physical uplink shared channel (PUSCH) transmission; and the transmitting the second PHR is in a second PUSCH transmission.

18 . The non-transitory computer-readable medium of claim 15 , wherein:
the first PHR comprises a first field indicating at least one of:
the first PCI; or
the serving cell; and
the second PHR comprises a second field indicating at least one of:
the second PCI; or
the non-serving cell.

19 . The non-transitory computer-readable medium of claim 15 , wherein the instructions further cause the wireless device to receive one or more messages comprising one or more configuration parameters for the serving cell; and wherein the one or more configuration parameters indicate:
a first pathloss reference signal index, for the first pathloss reference signal, that is lowest in a first set of pathloss reference signals associated with the first PCI; and a second pathloss reference signal index, for the second pathloss reference signal, that is lowest in a second set of pathloss reference signals associated with the second PCI.

20 . The non-transitory computer-readable medium of claim 15 , wherein at least one of the first pathloss reference signal or the second pathloss reference signal is a synchronization signal block (SSB).

Assignees

• Ofinno Llc

Inventors

• Cirik Ali Cagatay
• Yi Yunjung
• Dinan Esmael Hejazi
• Zhou Hua
• Park Jonghyun
• Jeon Hyoungsuk

Classifications

• H04W52/242

  taking into account path loss · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title