3GPP中FR2 Sensitivity spec的疑问

rf_master_66

FR2的Sensitivity spec的规定，按照power class的不同，spec也不同，这里为何跟FR1不一样，FR1没有这种会根据power class不同来区分，这是为什么呢？

Table 7.3.2.5-1: Reference sensitivity for power class 1
Operating band	REFSENS (dBm) / Channel bandwidth
	50 MHz	100 MHz	200 MHz	400 MHz
n257	-97.5+TT	-94.5+TT	-91.5+TT	-88.5+TT
n258	-97.5+TT	-94.5+TT	-91.5+TT	-88.5+TT
n260	-94.5+TT	-91.5+TT	-88.5+TT	-85.5+TT
n261	-97.5+TT	-94.5+TT	-91.5+TT	-88.5+TT

Table 7.3.2.5-2: Reference sensitivity for power class 2
Operating band	REFSENS (dBm) / Channel bandwidth
	50 MHz	100 MHz	200 MHz	400 MHz
n257	-94.5+TT	-91.5+TT	-88.5+TT	-85.5+TT
n258	-94.5+TT	-91.5+TT	-88.5+TT	-85.5+TT
n260
n261	-94.5+TT	-91.5+TT	-88.5+TT	-85.5+TT

Table 7.3.2.5-4: Reference sensitivity for power class 4
Operating band	REFSENS (dBm) / Channel bandwidth
	50 MHz	100 MHz	200 MHz	400 MHz
n257	-97+TT	-94+TT	-91+TT	-88+TT
n258	-97+TT	-94+TT	-91+TT	-88+TT
n260	-95+TT	-92+TT	-89+TT	-86+TT
n261	-97+TT	-94+TT	-91+TT	-88+TT