6.2.5C Configured transmitted power for Dual Connectivity

36.1013GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18TSUser Equipment (UE) radio transmission and reception

For inter-band dual connectivity with one uplink serving cell per CG, the UE is allowed to set its configured maximum output power P_CMAX,c(i),i for serving cell c(i) of CG i, i = 1,2, and its total configured maximum output power P_CMAX.

The configured maximum output power P_CMAX,c(i),i (p) in subframe p of serving cell c(i) on CG i shall be set within the following bounds:

P_{CMAX_L,c(i),i} (p) ≤ P_{CMAX,c(i), i} (p) ≤ P_{CMAX_H,c(i),i} (p)

where P_{CMAX_L,c(i),i} (p) and P_{CMAX_H,c(i),i} (p) are the limits for a serving cell c(i) of CG i as specified in subclause 6.2.5.

The total UE configured maximum output power P_CMAX (p,q) in a subframe p of CG 1 and a subframe q of CG 2 that overlap in time shall be set within the following bounds for synchronous and asynchronous operation unless stated otherwise:

P_{CMAX_L}(p,q) ≤ P_CMAX (p,q) ≤ P_{CMAX_H} (p,q)

with

P_{CMAX_L} (p,q) = MIN {10 log₁₀ [p_{CMAX_L,c(1),1} (p) + p_{CMAX_L,c(2),2} (q)], P_PowerClass}

P_{CMAX_H} (p,q) = MIN {10 log₁₀ [p_{CMAX_H,c(1),1} (p) + p_{CMAX_H,c(2),2} (q)], P_PowerClass}

where p_{CMAX_L,c(i),i} is p_{CMAX_H,c(i),i} are the respective limits P_{CMAX_L,c(i),i} (p) and P_{CMAX_H,c(i),i} (p) expressed in linear scale.

If the UE is configured in Dual Connectivity and synchronous transmissions of the UE on subframe p for a serving cell in one CG overlaps some portion of the first symbol of the transmission on subframe q +1 for a different serving cell in the other CG, the UE minimum of P_{CMAX_L} between subframes pairs (p, q) and (p+1, q +1) respectively applies for any overlapping portion of subframes (p, q) and (p +1, q+1). P_PowerClass shall not be exceeded by the UE during any period of time.

The measured total maximum output power P_UMAX over both CGs is

P_UMAX = 10 log₁₀ [p_UMAX,c(1),1 + p_UMAX,c(2),2],

where p_UMAX,c(i),i denotes the measured output power of serving cell c(i) of CG i expressed in linear scale.

If the UE is configured in Dual Connectivity and synchronous transmissions

P_{CMAX_L}(p, q) – T_LOW (P_{CMAX_L}(p, q)) ≤ P_UMAX ≤ P_{CMAX_H}(p, q) + T_HIGH (P_{CMAX_H}(p, q))

where P_{CMAX_L} (p,q) and P_{CMAX_H} (p,q) are the limits for the pair (p,q) and with the tolerances T_LOW(P_CMAX) and T_HIGH(P_CMAX) for applicable values of P_CMAX specified in Table 6.2.5C-1. P_{CMAX_L} may be modified for any overlapping portion of subframes (p, q) and (p +1, q+1).

If the UE is configured in Dual Connectivity and asynchronous transmissions, the subframes of the leading CG are taken as reference subframes for the measurement of the total configured output power P_UMAX. If subframe p of CG 1 and subframe q of CG 2 overlap in time in their respective slot 0 and

1. if p leads in time over q, then p is the reference subframe and the (p,q) and (p,q-1) pairs are considered for determining the P_CMAX tolerance

2. if q leads in time over p, then q is the reference subframe and the (p-1,q) and (p,q) pairs are considered for determining the P_CMAX tolerance;

for the reference subframe p duration (when subframe p in CG 1 leads):

P’_{CMAX_L} = MIN {P_{CMAX_L} (p,q) , P_{CMAX_L} (p,q-1)}

P’_{CMAX_H} = MAX {P_{CMAX_H} (p,q) , P_{CMAX_H} (p,q-1)}

while for the reference subframe q duration (when subframe q in CG 2 leads):

P’_{CMAX_L} = MIN {P_{CMAX_L} (p-1,q) , P_{CMAX_L} (p,q)}

P’_{CMAX_H} = MAX {P_{CMAX_H} (p-1,q) , P_{CMAX_H} (p,q)}

where P_{CMAX_L} and P_{CMAX_H} are the applicable limits for each overlapping subframe pairs (p,q) , (p, q-1) and (p-1,q). The measured total configured maximum output power P_UMAX shall be within the following bounds:

P’_{CMAX_L} – T_LOW (P’_{CMAX_L}) ≤ P_UMAX ≤ P’_{CMAX_H} + T_HIGH (P’_{CMAX_H})

with the tolerances T_LOW(P_CMAX) and T_HIGH(P_CMAX) for applicable values of P_CMAX specified in Table 6.2.5C-1.

Table 6.2.5C-1: P_CMAX tolerance for inter-band Dual Connectivity

PCMAX(dBm)	Tolerance TLOW(PCMAX_L )(dB)	Tolerance THIGH ( PCMAX_H )(dB)
PCMAX = 23	3.0	2.0
22 ≤PCMAX,< 23	5.0	2.0
21 ≤ PCMAX< 22	5.0	3.0
20 ≤ PCMAX, < 21	6.0	4.0
16 ≤ PCMAX < 20	5.0
11 ≤ PCMAX, < 16	6.0
-40 ≤ PCMAX < 11	7.0