Carrier frequency and EARFCN
2012-09-14 10:35:31| 分类: 通信|字号 订阅
TD-LTE的频点号称为EARFCN,也就是在ARFCN基础上做了改进。
EARFCN与频率之间不再是直接对应,而是增加了一个偏置(起始值),以保证EARFCN编号连续。
FDD的EARFCN从0~35999,TDD的EARFCN从36000~65531。
目前国内使用的38频段,EARFCN的起始值为37750,频率的起始值为2.57GHz,每100kHz对应一个频点号。比如2.6GHz,对应的EARFCN就是37750+300=38050。
3GPP TS 36.104 V11.1.0 (2012-07) 5.7.3 Carrier frequency and EARFCN
The carrier frequency in the uplink and downlink is designated by the E-UTRA Absolute Radio Frequency Channel Number (EARFCN) in the range 0 - 65535. The relation between EARFCN and the carrier frequency in MHz for the downlink is given by the following equation, where FDL_low and NOffs-DL are given in table 5.7.3-1 and NDL is the downlink EARFCN.
FDL = FDL_low + 0.1(NDL – NOffs-DL)
The relation between EARFCN and the carrier frequency in MHz for the uplink is given by the following equation where FUL_low and NOffs-UL are given in table 5.7.3-1 and NUL is the uplink EARFCN.
FUL = FUL_low + 0.1(NUL – NOffs-UL)
Table 5.7.3-1: E-UTRA channel numbers
E-UTRA Operating Band
|
Downlink
|
Uplink
|
FDL_low [MHz]
|
NOffs-DL
|
Range of NDL
|
FUL_low [MHz]
|
NOffs-UL
|
Range of NUL
|
1
|
2110
|
0
|
0 – 599
|
1920
|
18000
|
18000 – 18599
|
2
|
1930
|
600
|
600 - 1199
|
1850
|
18600
|
18600 – 19199
|
3
|
1805
|
1200
|
1200 – 1949
|
1710
|
19200
|
19200 – 19949
|
4
|
2110
|
1950
|
1950 – 2399
|
1710
|
19950
|
19950 – 20399
|
5
|
869
|
2400
|
2400 – 2649
|
824
|
20400
|
20400 – 20649
|
6
|
875
|
2650
|
2650 – 2749
|
830
|
20650
|
20650 – 20749
|
7
|
2620
|
2750
|
2750 – 3449
|
2500
|
20750
|
20750 – 21449
|
8
|
925
|
3450
|
3450 – 3799
|
880
|
21450
|
21450 – 21799
|
9
|
1844.9
|
3800
|
3800 – 4149
|
1749.9
|
21800
|
21800 – 22149
|
10
|
2110
|
4150
|
4150 – 4749
|
1710
|
22150
|
22150 – 22749
|
11
|
1475.9
|
4750
|
4750 – 4949
|
1427.9
|
22750
|
22750 – 22949
|
12
|
729
|
5010
|
5010 – 5179
|
699
|
23010
|
23010 – 23179
|
13
|
746
|
5180
|
5180 – 5279
|
777
|
23180
|
23180 – 23279
|
14
|
758
|
5280
|
5280 – 5379
|
788
|
23280
|
23280 – 23379
|
…
|
|
|
|
|
|
|
17
|
734
|
5730
|
5730 – 5849
|
704
|
23730
|
23730 – 23849
|
18
|
860
|
5850
|
5850 – 5999
|
815
|
23850
|
23850 – 23999
|
19
|
875
|
6000
|
6000 – 6149
|
830
|
24000
|
24000 – 24149
|
20
|
791
|
6150
|
6150 - 6449
|
832
|
24150
|
24150 - 24449
|
21
|
1495.9
|
6450
|
6450 – 6599
|
1447.9
|
24450
|
24450 – 24599
|
22
|
3510
|
6600
|
6600-7399
|
3410
|
24600
|
24600-25399
|
23
|
2180
|
7500
|
7500 – 7699
|
2000
|
25500
|
25500 – 25699
|
24
|
1525
|
7700
|
7700 – 8039
|
1626.5
|
25700
|
25700 – 26039
|
25
|
1930
|
8040
|
8040 - 8689
|
1850
|
26040
|
26040 - 26689
|
26
|
859
|
8690
|
8690 – 9039
|
814
|
26690
|
26690 - 27039
|
27
|
852
|
9040
|
9040 – 9209
|
807
|
27040
|
27040 – 27209
|
28
|
758
|
9210
|
9210 – 9659
|
703
|
27210
|
27210 – 27659
|
…
|
|
|
|
|
|
|
33
|
1900
|
36000
|
36000 – 36199
|
1900
|
36000
|
36000 – 36199
|
34
|
2010
|
36200
|
36200 – 36349
|
2010
|
36200
|
36200 – 36349
|
35
|
1850
|
36350
|
36350 – 36949
|
1850
|
36350
|
36350 – 36949
|
36
|
1930
|
36950
|
36950 – 37549
|
1930
|
36950
|
36950 – 37549
|
37
|
1910
|
37550
|
37550 – 37749
|
1910
|
37550
|
37550 – 37749
|
38
|
2570
|
37750
|
37750 – 38249
|
2570
|
37750
|
37750 – 38249
|
39
|
1880
|
38250
|
38250 – 38649
|
1880
|
38250
|
38250 – 38649
|
40
|
2300
|
38650
|
38650 – 39649
|
2300
|
38650
|
38650 – 39649
|
41
|
2496
|
39650
|
39650 – 41589
|
2496
|
39650
|
39650 – 41589
|
42
|
3400
|
41590
|
41590 – 43589
|
3400
|
41590
|
41590 – 43589
|
43
|
3600
|
43590
|
43590 – 45589
|
3600
|
43590
|
43590 – 45589
|
44
|
703
|
45590
|
45590 – 46589
|
703
|
45590
|
45590 – 46589
|
NOTE: The channel numbers that designate carrier frequencies so close to the operating band edges that the carrier extends beyond the operating band edge shall not be used. This implies that the first 7, 15, 25, 50, 75 and 100 channel numbers at the lower operating band edge and the last 6, 14, 24, 49, 74 and 99 channel numbers at the upper operating band edge shall not be used for channel bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz respectively.
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