頻帶

3gpp中NR規定了兩個較大的頻率範圍。一個是我們通常所說的（sub 6 Ghz），另一個是我們通常所說的毫米波。根據範圍的不同，最大帶寬和子載波間隔會有所不同。在sub 6 Ghz，最大帶寬爲100兆赫，在毫米波範圍內，最大帶寬爲400兆赫。一些子載波間隔（15，30 kHz）只能用於6 GHz以下，一些副載波間隔（120 kHz）只能用於毫米波範圍，一些副載波間隔（60 kHz）可以同時用於sub 6 Ghz和毫米波範圍。

1 頻帶總覽

< Based on 38.101-1 Table 5.2-1, Table 5.4.2.3-1 and 38.104 - Table 5.4.3.3-1>

NR Operating Band			Uplink (UL) operating band		Downlink (DL) operating band		Duplex Mode
			BS receive		BS transmit
			UE transmit		UE receive
			FUL_low – FUL_high	total BW	FDL_low – FDL_high	total BW
n1	Frquency		1920 MHz-1980 MHz	60	2110 MHz-2170 MHz	60	FDD
	ARFCN		384000 – <20> – 396000		422000 – <20> – 434000
	GSCN				5279 – <1> – 5419
n2	Frquency		1850 MHz-1910 MHz	60	1930 MHz-1990 MHz	60	FDD
	ARFCN		370000 – <20> – 382000		386000 – <20> – 398000
	GSCN				4829 – <1> – 4969
n3	Frquency		1710 Mhz -1785 MHz	75	1805 MHz-1880 MHz	75	FDD
	ARFCN		342000 – <20> – 357000		361000 – <20> – 376000
	GSCN				4517 – <1> – 4693
n5	Frquency		824 -849 MHz	25	869 MHz-894MHz	25	FDD
	ARFCN		164800 – <20> – 169800		173800 – <20> – 178800
	GSCN	15 Khz			2177 – <1> – 2230
	GSCN	30 khz			2183 – <1> – 2224
n7	Frquency		2500 MHz-2570 MHz	70	2620 MHz-2690 MHz	70	FDD
	ARFCN		500000 – <20> – 514000		524000 – <20> – 538000
	GSCN				6554 – <1> – 6718
n8	Frquency		880 MHz-915 MHz	35	925 MHz-960 MHz	35	FDD
	ARFCN		176000 – <20> – 78300		185000 – <20> – 192000
	GSCN				2318 – <1> – 2395
n12	Frquency		699 Mhz-716 Mhz	17	729 Mhz-746 Mhz	17	FDD
	ARFCN		139800 – <20> – 143200		145800 – <20> – 149200
	GSCN				1828 - <1> - 1858
n20	Frquency		832 MHz-862 MHz	30	791 MHz-821 MHz	30	FDD
	ARFCN		166400 – <20> – 172400		158200 – <20> – 164200
	GSCN				1982 – <1> – 2047
n25	Frquency		1850 Mhz-1915 Mhz	65	1930 Mhz-1995 Mhz	65	FDD
	ARFCN		370000 – <20> – 383000		386000 – <20> – 399000
	GSCN				4829 – <1> – 4981
n28	Frquency		703 MHz-748 MHz	45	758 MHz-803 MHz	45	FDD
	ARFCN		140600 – <20> – 149600		151600 – <20> – 160600
	GSCN				1901 – <1> – 2002
n34	Frquency		2010 Mhz-2025 Mhz	15	2010 Mhz-2025 Mhz	15	TDD
	ARFCN		402000 – <20> – 405000		402000 – <20> – 405000
	GSCN				5030 – <1> – 5056
n38	Frquency		2570 MHz-2620 MHz	50	2570 MHz-2620 MHz	50	TDD
	ARFCN		514002 – <3> – 523998		514002 – <3> – 523998
	GSCN				6431 – <1> – 6544
n39	Frquency		1880 Mhz - 1920 Mhz	40	1880 Mhz- 1920 Mhz	40	TDD
	ARFCN		376000 – <20> – 384000		376000 – <20> – 384000
	GSCN				4706 – <1> – 4795
n40	Frquency		2300 Mhz - 2400 Mhz	100	2300 Mhz - 2400 Mhz	100	TDD
	ARFCN		460000 – <20> – 480000		460000 – <20> – 480000
	GSCN				5756 – <1> – 5995
n41	Frquency		2496 MHz-2690 MHz	194	2496 MHz-2690 MHz	194	TDD
	ARFCN	15 Khz	499200 – <3> – 537999		499200 – <3> – 537999
	ARFCN	30 khz	499200 – <6> – 537999		499200 – <6> – 537999
	GSCN	15 Khz			6246 – <3> – 6717
	GSCN	30 khz			6252 – <3> – 6714
n50	Frquency		1432 MHz-1517 MHz	85	1432 MHz-1517 MHz	85	TDD
	ARFCN		286400 – <20> – 303400		286400 – <20> – 303400
	GSCN				3584 – <1> – 3787
n51	Frquency		1427 MHz-1432 MHz	5	1427 MHz-1432 MHz	5	TDD
	ARFCN		285400 – <20> – 286400		285400 – <20> – 286400
	GSCN				3572 – <1> – 3574
n66	Frquency		1710 MHz-1780 MHz	70	2110 MHz-2200 MHz	90	FDD
	ARFCN		342000 – <20> – 356000		422000 – <20> – 440000
	GSCN	15 Khz			5279 – <1> – 5494
	GSCN	30 khz			5285 – <1> – 5488
n70	Frquency		1695 MHz-1710 MHz	15	1995 MHz-2020 MHz	25	FDD
	ARFCN		339000 – <20> – 342000		399000 – <20> – 404000
	GSCN				4993 – <1> – 5044
n71	Frquency		663 MHz-698 MHz	35	617 MHz-652 MHz	35	FDD
	ARFCN		132600 – <20> – 139600		123400 – <20> – 130400
	GSCN				1547 – <1> – 1624
n74	Frquency		1427 MHz-1470 MHz	43	1475 MHz-1518 MHz	43	FDD
	ARFCN		285400 – <20> – 294000		295000 – <20> – 303600
	GSCN				[3692 – <1> – 3790]
n75	Frquency		N/A		1432 Mhz -1517 MHz	85	SDL
	ARFCN		N/A		286400 – <20> – 303400
	GSCN				3584 – <1> – 3787
n76	Frquency		N/A		1427 Mhz -1432 MHz	5	SDL
	ARFCN		N/A		285400 – <20> – 286400
	GSCN				3572 – <1> – 3574
n77	Frquency		3300 MHz- 4200 MHz	900	3300 MHz- 4200 MHz	900	TDD
	ARFCN		620000 – <1> – 680000		620000 – <1> – 680000
	GSCN				7711 – <1> – 8329
n78	Frquency		3300 MHz-3800 MHz	500	3300 MHz - 3800 MHz	500	TDD
	ARFCN		620000 – <1> – 653333		620000 – <1> – 653333
	GSCN				7711 – <1> – 8051
n79	Frquency		4400 MHz-5000 MHz	600	4400 MHz - 5000 MHz	600	TDD
	ARFCN		693333 – <1> – 733333		693333 – <1> – 733333
	GSCN				8480 – <16> – 8880
n80	Frquency		1710 MHz-1785 MHz	75	N/A		SUL
	ARFCN		342000 – <20> – 357000
	GSCN
n81	Frquency		880 MHz-915 MHz	35	N/A		SUL
	ARFCN		176000 – <20> – 183000
	GSCN
n82	Frquency		832 MHz-862 MHz	30	N/A		SUL
	ARFCN		166400 – <20> – 172400
	GSCN
n83	Frquency		703 MHz-748 MHz	45	N/A		SUL
	ARFCN		140600 – <20> –149600
	GSCN
n84	Frquency		1920 MHz-1980 MHz	60	N/A		SUL
	ARFCN		384000 – <20> – 396000
	GSCN
n86	Frquency		1710 MHz-1780 MHz	70			SUL
	ARFCN		342000 – <20> – 356000
	GSCN

< Based on 38.101-2 Table 5.2-1, Table 5.4.2.2-1 and 38.104 - Table 5.4.3.1-1>

NR Operating Band			Uplink (UL) operating band		Downlink (DL) operating band		Duplex Mode
			BS receive		BS transmit
			UE transmit		UE receive
			FUL_low – FUL_high	total BW	FDL_low – FDL_high	total BW
n257	Frequency		26500 MHz–29500 MHz	3000	26500 MHz–29500 MHz	3000	TDD
	ARFCN		2054167 – <1> – 2104166		2054167 – <1> – 2104166
	GSCN	120 Khz	[24306 – <1> – 24476]		[24306 – <1> – 24476]
	GSCN	240 Khz	[24308 – <2> – 24474]		[24308 – <2> – 24474]
n258	Frequency		24250 MHz–27500 MHz	3260	24250 MHz–27500 MHz	3260	TDD
	ARFCN		2016667 – <1> – 2070833		2016667 – <1> – 2070833
	GSCN	120 Khz	[24175 – <1> – 24361]		[24175 – <1> – 24361]
	GSCN	240 Khz	[24176 – <2> – 24360]		[24176 – <2> – 24360]
n260	Frequency		37000 MHz–40000 MHz	3000	37000 MHz–40000 MHz	3000	TDD
	ARFCN		2229167 – <1> – 2279166		2229167 – <1> – 2279166
	GSCN	120 Khz	[24913 – <1> – 25084]		[24913 – <1> – 25084]
	GSCN	240 Khz	[24916 – <2> – 25080]		[24916 – <2> – 25080]

2 頻率範圍

如上所述，3gpp中定義了兩種頻率範圍，低於6千兆赫的範圍稱爲FR1，毫米波範圍稱爲FR2。FR1（低於6 GHz）和FR2（毫米波）的準確頻率範圍定義如下：

3 工作頻段

< Based on 38.101-1 Table 5.2-1: NR operating bands in FR1 >

NR Operating Band	Uplink (UL) operating band		Downlink (DL) operating band		Duplex Mode
	BS receive		BS transmit
	UE transmit		UE receive
	FUL_low – FUL_high	total BW	FDL_low – FDL_high	total BW
n1	1920 MHz-1980 MHz	60	2110 MHz-2170 MHz	60	FDD
n2	1850 MHz-1910 MHz	60	1930 MHz-1990 MHz	60	FDD
n3	1710 Mhz -1785 MHz	75	1805 MHz-1880 MHz	75	FDD
n5	824 -849 MHz	25	869 MHz-894MHz	25	FDD
n7	2500 MHz-2570 MHz	70	2620 MHz-2690 MHz	70	FDD
n8	880 MHz-915 MHz	35	925 MHz-960 MHz	35	FDD
n20	832 MHz-862 MHz	30	791 MHz-821 MHz	30	FDD
n28	703 MHz-748 MHz	45	758 MHz-803 MHz	45	FDD
n38	2570 MHz-2620 MHz	50	2570 MHz-2620 MHz	50	TDD
n41	2496 MHz-2690 MHz	194	2496 MHz-2690 MHz	194	TDD
n50	1432 MHz-1517 MHz	85	1432 MHz-1517 MHz	85	TDD
n51	1427 MHz-1432 MHz	5	1427 MHz-1432 MHz	5	TDD
n66	1710 MHz-1780 MHz	70	2110 MHz-2200 MHz	90	FDD
n70	1695 MHz-1710 MHz	15	1995 MHz-2020 MHz	25	FDD
n71	663 MHz-698 MHz	35	617 MHz-652 MHz	35	FDD
n74	1427 MHz-1470 MHz	43	1475 MHz-1518 MHz	43	FDD
n75	N/A		1432 Mhz -1517 MHz	85	SDL
n76	N/A		1427 Mhz -1432 MHz	5	SDL
n78	3300 MHz-3800 MHz	500	3300 MHz - 3800 MHz	500	TDD
n77	3300 MHz- 4200 MHz	900	3300 MHz - 4200 MHz	900	TDD
n79	4400 MHz-5000 MHz	600	4400 MHz - 5000 MHz	600	TDD
n80	1710 MHz-1785 MHz	75	N/A		SUL
n81	880 MHz-915 MHz	35	N/A		SUL
n82	832 MHz-862 MHz	30	N/A		SUL
n83	703 MHz-748 MHz	45	N/A		SUL
n84	1920 MHz-1980 MHz	60	N/A		SUL
n86	1710 MHz-1780 MHz	70	N/A		SUL

< Based on 38.101-2 Table 5.2-1: NR operating bands in FR2 >

NR Operating Band	Uplink (UL) operating band		Downlink (DL) operating band		Duplex Mode
	BS receive		BS transmit
	UE transmit		UE receive
	FUL_low – FUL_high	total BW	FDL_low – FDL_high	total BW
n257	26500 MHz–29500 MHz	3000	26500 MHz–29500 MHz	3000	TDD
n258	24250 MHz–27500 MHz	3260	24250 MHz–27500 MHz	3260	TDD
n260	37000 MHz–40000 MHz	3000	37000 MHz–40000 MHz	3000	TDD

4 頻譜和帶寬

這個例子看起來很明顯，說“信道帶寬=最大傳輸帶寬+兩側的保護帶”，但下表中，可能不清楚，因爲最大傳輸帶寬是以RB爲單位指定的，保護帶是以千赫爲單位。

爲了澄清這一點，有一個簡單的方程式和例子，如下所示：

5 每個頻段支持的信道帶寬

< 38.101-1 Table 5.3.5-1 Channel Bandwidths for Each NR band : FR1 >

NR band / SCS / UE Channel bandwidth

NR Band

SCS

5 MHz

10 MHz

15 MHz

20 MHz

25 MHz

30 MHz

40 MHz

50 MHz

60 MHz

80 MHz

100 MHz

kHz

Yes

n20

Yes

n28

Yes

n38

Yes

n41

Yes

n50

Yes

n51

Yes

n66

Yes

n70

Yes

n71

Yes

n74

Yes

n75

Yes

n76

Yes

n77

Yes

n78

Yes

n79

Yes

n80

Yes

n81

Yes

n82

Yes

n83

Yes

n84

Yes

< 38.101-2 Table 5.3.5-1 Channel bandwidths for each NR band : FR2 >

NR band / SCS / UE Channel bandwidth
NR Band	SCS (kHz)	50 MHz	100 MHz	200 MHz	400 MHz
n257	60	Yes	Yes	Yes	Yes
n257	120	Yes	Yes	Yes	Yes
n258	60	Yes	Yes	Yes	Yes
n258	120	Yes	Yes	Yes	Yes
n260	60	Yes	Yes	Yes	Yes
n260	120	Yes	Yes	Yes	Yes

6 NR-ARFCN

7 GSCN

GSCN稱爲全局同步柵格信道（Global Synchronization Raster Channel）。已經有了名爲ARFCN的現有頻率規範（光柵）時，爲什麼我們需要這種額外的頻率規範？”.

3GPP 規範中沒有明確解釋，個人猜測如下：

當NSA中的NR被激活時，由於頻率、子載波間隔等都是由LTE RRC連接重新配置消息配置的，因此UE不需要對SSB進行盲搜索。但在SA中，UE需要盲目檢測SSB，因爲UE需要在收到任何RRC（MIB、SIB）之前檢測到SSB。如果用戶需要基於ARFCN搜索SSB，則由於ARFCN光柵很窄，搜索時間太長。因此，以更寬的步長定義SSB搜索頻率很有必要。