4G Frequency Bands
LTE has been developed to operate on paired spectrum for Frequency Division Duplex (СЗД), and unpaired spectrum for Time Division Duplex (TDD).
For an LTE radio system to facilitate bidirectional communication, it is necessary to implement a duplex scheme so that a device may transmit and receive without collision. In order to achieve high data rates, LTE operates full duplex whereby both downlink (DL) and uplink (UL) communication takes place simultaneously by separating DL and UL traffic either by frequency (i.e., СЗД), or time periods (i.e., TDD).
While less efficient and more electrically complex to deploy, FDD tends to be more commonly deployed by operators due to refarming of existing 3G spectrum arrangements. By comparison, deploying TDD requires less spectrum as well as eliminating then need for guard bands permitting a more efficient stacking of spectrum. UL/DL capacity can also be dynamically adjusted to match demand simply by devoting more airtime to one over the other. спрос на стационарные телефоны в офисе постоянно растет, transmission timing must be synchronised between base stations, introducing complexity, along with guard periods being required between DL and UL subframes, which reduces capacity.
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FDD LTE Frequency Bands
The continuing evolution of carrier aggregation has resulted in several new bands added, including B29, B32, B67, and B69 used for downlink-only carrier aggregation, termed Supplemental DL bands[5]. Supplemental DL bands 252 и 255 have been included as part of the LTE-U expansion into unlicensed 5 GHz bands U-NII-1 and U-NII-3, respectively.
Release 16.0 in April 2019 saw the introduction of European 450 MHz LTE bands for the purposes of emergency services use during disaster relief.
The below table lists the 39 Frequency Division Duplex and Supplemental Downlink LTE bands, compiled from 3GPP 36.101 (Rel. 17.1) [June 2023]
| E-UTRA Band | Identifier | Uplink (МГц) | Downlink (МГц) | UL EARFCN | DL EARFCN | Channel Bandwidths (МГц) |
|---|---|---|---|---|---|---|
| B1 (2100 МГц) | IMT Core Band | 1920 – 1980 | 2110 – 2170 | 18000 – 18599 | 0 – 599 | 0.2, 5, 10, 15, 20 |
| B2 (1900 МГц) | PCS 1900 | 1850 – 1910 | 1930 – 1990 | 18600 – 19199 | 600 – 1199 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B3 (1800 МГц) | 1800 | 1710 – 1785 | 1805 – 1880 | 19200 – 19949 | 1200 – 1949 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B4 (1700 МГц) | AWS 1700 | 1710 – 1755 | 2110 – 2155 | 19950 – 20399 | 1950 – 2399 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B5 (850 МГц) | 850 | 824 – 849 | 869 – 894 | 20400 – 20649 | 2400 – 2649 | 0.2, 1.4, 3, 5, 10 |
| B7 (2600 МГц) | IMT Extension | 2500 – 2570 | 2620 – 2690 | 20750 – 21449 | 2750 – 3449 | 0.2, 5, 10, 15, 20 |
| B8 (900 МГц) | 900 | 880 – 915 | 925 – 960 | 21450 – 21799 | 3450 – 3799 | 0.2, 1.4, 3, 5, 10 |
| B9 (1800 МГц) | 1700 (Japan #2) | 1749.9 – 1784.9 | 1844.9 – 1879.9 | 21800 – 22149 | 3800 – 4149 | 5, 10, 15, 20 |
| B10 (1700 МГц) | 3G Americas Extended AWS blocks A-I | 1710 – 1770 | 2110 – 2170 | 22150 – 22749 | 4150 – 4749 | 5, 10, 15, 20 |
| B11 (1500 МГц) | 1500 (Japan #3) | 1427.9 – 1452.9 | 1475.9 – 1500.9 | 22750 – 22949 | 4750 – 4949 | 5, 10 |
| B12 (700 МГц) | US 700 Lower A, B, С | 698 – 716 | 728 – 746 | 23010 – 23179 | 5010 – 5179 | 0.2, 1.4, 3, 5 |
| B13 (700 МГц) | US 700 Upper C | 777 – 787 | 746 – 756 | 23180 – 23279 | 5180 – 5279 | 0.2, 5, 10 |
| B14 (700 МГц) | US 700 Upper D | 788 – 798 | 758 – 768 | 23280 – 23379 | 5280 – 5379 | 5, 10 |
| B17 (700 МГц) | US 700 Lower B, С | 704 – 716 | 734 – 746 | 23730 – 23849 | 5730 – 5849 | 5, 10 |
| B18 (850 МГц) | 850 (Japan #4) | 815 – 830 | 860 – 875 | 23850 – 23999 | 5850 – 5999 | 0.2, 5, 10, 15 |
| B19 (850 МГц) | 850 (Japan #5) | 830 – 845 | 875 – 890 | 24000 – 24149 | 6000 – 6149 | 0.2, 5, 10, 15 |
| B20 (800 МГц) | CEPT 800 | 832 – 862 | 791 – 821 | 24150 – 24449 | 6150 – 6449 | 0.2, 5, 10, 15, 20 |
| B21 (1500 МГц) | 1500 (Japan #6) | 1447.9 – 1462.9 | 1495.5 – 1510.9 | 24450 – 24599 | 6450 – 6599 | 0.2, 5, 10, 15 |
| B22 (3500 МГц) | СЗД 3500 | 3410 – 3500 | 3510 – 3600 | 24600 – 25399 | 6600 – 7399 | 5, 10, 15, 20 |
| B24 (1600 МГц) | US L-Band | 1625.5 – 1660.5 | 1525 – 1559 | 25700 – 26039 | 7700 – 8039 | 5, 10 |
| B25 (1900 МГц) | PCS 1900 грамм | 1850 – 1915 | 1930 – 1995 | 26040 – 26689 | 8040 – 8689 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B26 (850 МГц) | E850 Upper | 814 – 849 | 859 – 894 | 26690 – 27039 | 8690 – 9039 | 0.2, 1.4, 3, 5, 10, 15 |
| B27 (850 МГц) | E850 Lower LTE | 807 – 824 | 852 – 869 | 27040 – 27209 | 9040 – 9209 | 1.4, 3, 5 |
| B28 (700 МГц) | APT 700 | 703 – 748 | 758 – 803 | 27210 – 27659 | 9210 – 9659 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B30 (2300 МГц) | LTE WCS | 2305 – 2315 | 2350 – 2360 | 27660 – 27710 | 9770 – 9869 | 5, 10 |
| B31 (450 МГц) | LTE 450 Бразилия | 452.5 – 457.5 | 462.5 – 467.5 | 27760 – 27785 | 9870 – 9919 | 0.2, 1.4, 3, 5 |
| B65 (2100 МГц) | 2 GHz LTE | 1920 – 2010 | 2110 – 2200 | 131072 – 131971 | 65536 – 66435 | 1.4, 3, 5, 10, 15, 20 |
| B66 (1700 МГц) | AWS Extension | 1710 – 1780 | 2110 – 2200 | 131972 – 132671 | 66436 – 67335 | 1.4, 3, 5, 10, 15, 20 |
| B68 (700 МГц) | LTE 700 Arab Region | 698 – 728 | 753 – 783 | 132672 – 132971 | 67536 – 67835 | 5, 10, 15 |
| B70 (1700 МГц) | AWS-3/4 | 1695 – 1710 | 1995 – 2020 | 132972 – 133121 | 68336 – 68585 | 5, 10, 15, 20 |
| B71 (600 МГц) | US 600 | 663 – 698 | 617 – 652 | 133122 – 133471 | 68586 – 68935 | 0.2, 5, 10, 15, 20 |
| B72 (450 МГц) | 450 EU BB-PPDR | 451 – 456 | 461 – 466 | 133472 – 133521 | 68936 – 68985 | 0.2, 1.4, 3, 5 |
| B73 (450 МГц) | 450 LTE APAC | 450 – 455 | 460 – 465 | 133522 – 133571 | 68986 – 69035 | 0.2, 1.4, 3, 5 |
| B74 (1500 МГц) | FDD L-band | 1427 – 1470 | 1475 – 1518 | 133572 – 134001 | 69036 – 69465 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B85 (700 МГц) | 700 a+ | 698 – 716 | 728 – 746 | 134002 – 134181 | 70366 – 70545 | 5, 10 |
| B87 (450 МГц) | PPDR PMR/PMAR in EU | 410 – 415 | 420 – 425 | 134182 – 134231 | 70546 – 70595 | 0.2, 1.4, 3, 5 |
| B88 (450 МГц) | PPDR PMR/PMAR in EU | 412 – 417 | 422 – 427 | 134231 – 134280 | 70596 – 70645 | 0.2, 1.4, 3, 5 |
| B103 (700 МГц) | NB-IoT 700 | 787 – 788 | 757 – 758 | 134282 – 134291 | 70646 – 70655 | 0.2 |
| B106 (900 МГц) | 900 СЗД | 896 – 901 | 935 – 940 | 134292 – 134341 | 70656 – 70705 | 1.4, 3 |
TDD LTE Frequency Bands
The increasing asymmetric demand for downlink data has also resulted in the introduction of Band 46, a downlink-only Supplemental DL band operating in the 5 GHz U-NII frequency range.
Группа 47 has been introduced for applications such as Vehicle to Everything (V2X) communications, which is positioned in the U-NII-3 5 GHz unlicensed band. Cellular V2X (C-V2X) may require the use of unlicensed bands to solve regulatory issues related to LTE-Direct, where devices broadcast directly to nearby devices[6]. Like all unlicensed band LTE technologies, V2X operates Band 47 only in carrier aggregation with the operator’s licensed band.
The below table lists the 20 Time Division Duplex and Supplemental Downlink LTE bands, compiled from 3GPP 36.101 (Rel. 17.1) [June 2023]
| E-UTRA Band | Identifier | Частота (МГц) | EARFCN | Channel Bandwidths (МГц) |
|---|---|---|---|---|
| B33 (2100 МГц) | TDD 2000 Lower | 1900 – 1920 | 36000 – 36199 | 5, 10, 15, 20 |
| B34 (2100 МГц) | TDD 2000 Upper | 2010 – 2025 | 36200 – 36349 | 5, 10, 15 |
| B35 (1900 МГц) | 1900 | 1850 – 1910 | 36350 – 36949 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B36 (1900 МГц) | TDD 1900 | 1930 – 1990 | 36950 – 37549 | 0.2, 1.4, 3, 5, 10, 15, 20 |
| B37 (1900 МГц) | PCS Center Gap | 1910 – 1930 | 37550 – 37749 | 5, 10, 15, 20 |
| Б38 (2600 МГц) | IMT Extension Gap | 2570 – 2620 | 37750 – 38249 | 5, 10, 15, 20 |
| B39 (1900 МГц) | China TDD 1900 | 1880 – 1920 | 38250 – 38649 | 5, 10, 15, 20 |
| B40 (2300 МГц) | TDD 2300 | 2300 – 2400 | 38650 – 39649 | 5, 10, 15, 20 |
| B41 (2500 МГц) | TDD 2500 | 2496 – 2690 | 39650 – 41589 | 5, 10, 15, 20 |
| B42 (3500 МГц) | TDD 3500 | 3400 – 3600 | 41590 – 43589 | 5, 10, 15, 20 |
| B43 (3700 МГц) | TDD 3700 | 3600 – 3800 | 43590 – 45589 | 5, 10, 15, 20 |
| B44 (700 МГц) | APT 700 TDD | 703 – 803 | 45590 – 46589 | 3, 5, 10, 15, 20 |
| B45 (1500 МГц) | China TDD 1400 | 1447 – 1467 | 46590 – 46789 | 5, 10, 15, 20 |
| B46 (5200 МГц) | LAA 5200 | 5150 – 5925 | 46790 – 54539 | 10, 20 |
| B47 (5800 МГц) | V2X 5800 | 5855 – 5925 | 54540 – 55239 | 10, 20 |
| B48 (3600 МГц) | US CBRS 3500 | 3550 – 3700 | 55240 – 56739 | 5, 10, 15, 20 |
| B50 (1500 МГц) | TD 1500+ | 1432 – 1517 | 58240 – 59089 | 3, 5, 10, 15, 20 |
| B51 (1500 МГц) | TD 1500- | 1427 – 1432 | 59090 – 59139 | 5 |
| B53 (2400 МГц) | TDD LTE over WiFi | 2483.5 – 2495 | 60140 – 60254 | 1.4, 3, 5, 10 |
| B54 (1600 МГц) | TD 1700 | 1670 – 1675 | 60255 – 60304 | 5 |
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