1. EARFCN:
缩写: E-UTRA Absolute Radio Frequency Channel Number,
取值范围: 0 – 65535
EARFCN:LTE的载波频点号,FDD的EARFCN从0~35999, TDD的EARFCN从36000~65531。
计算公式:37750+(使用频率-2570)/0.1
TD-LTE的频点编号从36000开始,F_c代表载波中心频率(MHz),F_low代表频带内的起始频率,N_Offs代表上频带内的起始频点。
F_c=F_low + 0.1*(N_Earfcn – N_Offs)
例:假如某小区freq_info: 38700 则对应的F_c=2300 +0.1*(38700-38650)=2305MHz,然后通过MIB获取小区bandwidth
LTE主要分三个频段:D(室外)、E(室内)、F(室外)
E频段:Freq=2300+0.1*(EARFCN-38650);
D频段:Freq=2570+0.1*(EARFCN-37750);
F频段:Freq=1800+0.1*(EARFCN-38250);
其中Freq(MHZ)代表载波中心频率;
2300、2570、1880代表各频段内的中心起始频率,38650、37750、38250代表各频段内的起始EARFCN(频点)
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。
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 respective |