IP Library › Granted Patent US 12666365
Granted Patent B2
US 12666365 · App. 18/285,140 · Granted Jun 23, 2026

Exploitation of transmitter (TX) power for each band dual up-link (UL) carrier aggregation (CA)

Inventors: Hiromasa Umeda (Kawasaki, JP); Petri Juhani Vasenkari (Turku, FI); Tero Henttonen (Espoo, FI)
Assignee: NOKIA TECHNOLOGIES OY
H04W52/146H04W8/24H04W52/367
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Quick Facts
Patent No.
US 12666365
App. No.
18/285,140
Granted
Jun 23, 2026
Kind
B2
Abstract

Various techniques are provided for a method including receiving, at a network device from a user equipment (UE), an indication of a UE capability to support a per-band maximum power for a radio band combination (BC) used by the UE, determining whether the UE supports per-band maximum power for the radio BC based on the indication of the UE capability, and in response to determining the UE supports per-band maximum power for the radio BC, determining a total UE transmission power based on a sum of a maximum power of each band in the radio BC.

Claims (46)

1 . A method comprising:

providing, using a user equipment (UE), to a network device, an indication of a UE capability to support a per-band maximum power based on a per-band power class (PC) for a radio band combination (BC), the radio BC including two or more uplink carriers; and

operating with a maximum UE transmission power (PCMAX) over the two or more uplink carriers, wherein an upper limit for PCMAX (PCMAX_H) and a lower limit for PCMAX (PCMAX_L) are determined using a summation of the per-band PC for respective bands of radio bands in the radio BC, such that the PCMAX may exceed an indicated uplink power class transmission power of the UE for an inter band carrier aggregation of the two or more uplink carriers.

2 . The method of claim 1 , wherein uplink carrier aggregation (CA) is supported by the UE.

3 . The method of claim 2 , wherein the radio BC supports two or more uplink CA.

4 . The method according to claim 1 , further comprising:

providing, using the UE, to the network device, the per-band PC for respective bands of the radio bands in the radio BC.

5 . The method of claim 1 , wherein the indication of the UE capability to support the per-band maximum power based on the per-band PC for the radio BC indicates that the UE is capable of operating at full power in respective uplink bands.

6 . The method of claim 1 , wherein, if a radio band includes two or more uplink carriers, a combined power is limited to the PC for an associated radio band.

7 . The method of claim 1 , further comprising:

relaxing a lower boundary of a total configured maximum output power as a delta value equal to a sum of a maximum power of respective bands of the radio bands in the radio BC minus a maximum of one of a respective NR band or an intra band NR CA UE Power Classes within a corresponding band configuration.

8 . The method of claim 7 , further comprising:

relaxing a lower boundary of a total configured maximum output power by replacing a UL power class for an UL CA with the maximum of one of a respective NR band or an intra band NR CA UE Power Classes for the UL CA.

9 . The method of claim 1 , further comprising:

relaxing a lower boundary of a total configured maximum output power for UL inter-band CA by replacing a UL power class for the UL CA instead of a sum in a formula to determine the lower boundary formula with the UL power class for the UL CA.

10 . A method comprising:

receiving, at a network device, from a user equipment (UE), an indication of a UE capability to support a per-band maximum power based on a per-band power class (PC) for a radio band combination (BC) used by the UE, the radio BC including two or more uplink carriers;

determining, based on the indication of the UE capability, whether the UE supports the per-band maximum power for the radio BC; and

in response to determining the UE supports the per-band maximum power for the radio BC, determining a total UE transmission power (PCMAX) over the two or more uplink carriers, wherein an upper limit for PCMAX (PCMAX_H) and a lower limit for PCMAX (PCMAX_L) are determined using a summation of the per-band PC for respective bands of radio bands in the radio BC, such that the PCMAX may exceed an indicated uplink power class transmission power of the UE for an inter band carrier aggregation of the two or more uplink carriers..

11 . The method of claim 10 , wherein the indication of the UE capability to support the per-band maximum power for the radio BC used by the UE indicates uplink carrier aggregation (CA) is supported by the UE.

12 . The method of claim 11 , wherein the radio BC supports two or more uplink CA.

13 . The method of claim 10 , wherein the indication of the UE capability to support the per-band maximum power for the radio BC used by the UE indicates that the UE is capable of operating at full power in respective uplink bands.

14 . The method according to claim 10 , further comprising:

receiving, at the network device, from the UE, a per-band power class (PC) for respective bands of the radio bands in the radio BC.

15 . The method of claim 10 , further comprising:

calculating a maximum allowed UE transmission power for respective bands of the radio bands in the radio BC based on the maximum PC associated with a corresponding band for the radio BC; and

applying, in uplink power control, the maximum UE transmission power for respective bands in the radio BC without considering a per-band power class for the radio BC.

16 . The method of claim 10 , wherein the indication of the UE capability to support the per-band maximum power for the radio BC used by the UE is included in a UE power capability report, and if the UE power capability report does not include the indication of the UE capability to support the per-band maximum power for the radio BC used by the UE, uplink power control is based on a default power control.

17 . The method of claim 10 , wherein, if a radio band includes two or more uplink carriers, a combined power is limited to a power class for an associated radio band.

18 . The method of claim 10 , further comprising:

relaxing a lower boundary of a total configured maximum output power as a delta value equal to the sum of the maximum power of respective bands in the radio BC minus a maximum of one of a respective NR band or an intra band NR CA UE Power Classes within a corresponding band configuration.

19 . The method of claim 18 , further comprising:

relaxing a lower boundary of a total configured maximum output power by replacing a UL power class for an UL CA with the maximum of one of a respective NR band or an intra band NR CA UE Power Classes for the UL CA.

20 . The method of claim 10 , further comprising:

relaxing a lower boundary of a total configured maximum output power for UL inter-band CA by replacing a UL power class for the UL CA instead of the sum in a formula to determine the lower boundary formula with the UL power class for the UL CA.

21 . A user equipment (UE) comprising:

at least one processor; and

at least one memory storing instructions thereon that, when executed by the at least one processor, cause the user equipment to perform at least:

providing, to a network device, an indication of a UE capability to support a per-band maximum power based on a per-band power class (PC) for a radio band combination (BC), the radio BC including two or more uplink carriers; and

applying, in uplink power control for uplink transmissions from the UE, a maximum UE transmission power (PCMAX) according to the per-band PC for respective bands of bands in the radio BC, wherein an upper limit for PCMAX (PCMAX_H) and a lower limit for PCMAX (PCMAX_L) are determined using a summation of a per-band power class for respective bands of radio bands in the radio BC, such that the PCMAX may exceed an indicated uplink power class transmission power of the UE for an inter band carrier aggregation of the two or more uplink carriers.

22 . An apparatus comprising:

at least one processor; and

at least one memory storing instructions thereon that, when executed by the at least one processor, cause the apparatus to perform at least:

receiving, from a user equipment (UE), an indication of a UE capability to support a per-band maximum power based on a per-band power class (PC) for a radio band combination (BC) used by the UE, the radio BC including two or more uplink carriers;

determining, based on a sum of a maximum power of respective bands in the radio BC, whether the UE supports the per-band maximum power for the radio BC used by the UE; and

in response to determining the UE supports the per-band maximum power for the radio BC, determining a total UE transmission power (PCMAX) over the two or more uplink carriers, wherein an upper limit for PCMAX (PCMAX_H) and a lower limit for PCMAX (PCMAX_L) are determined using a summation of the per-band PC for respective bands of radio bands in the radio BC, such that the PCMAX may exceed an indicated uplink power class transmission power of the UE for an inter band carrier aggregation of the two or more uplink carriers.