Cellular Networks
4G LTE Band and Frequency Spectrum
4G cellular network is the fourth generation of the mobile phone telecommunications network. It is an all IP-based network system that can provide high speed, high quality, and high capacity to users and seamlessly hand over voice and data to previous 2G and 3G networks. The best preferred 4G network standard is 3GPP Long Term Evolution, known as LTE, which has been deployed in over 200 countries.
FDD LTE vs TDD LTE
FDD LTE (FD-LTE) is short of Frequency Division Duplex.
TDD LTE (TD-LTE) is short of Time Division Duplex.
They are two different technologies of the 4G LTE mobile phone networks. Both of them are used to maximize the available bandwidth. There is a large number of radio spectrum that has been reserved for 4G LTE networks.
4G FDD-LTE Frequency Band Allocations
FDD LTE uses a paired spectrum with different frequencies to transmitting (uplink) and receiving (downlink) signals simultaneously. FDD LTE also has a guard band to avoid interference between uplink and downlink.
| FDD-LTE Band | Uplink | Downlink | Band Width | Duplex Spacing | Guard Band |
| B1 | 1920 – 1980 MHz | 2110 – 2170 MHz | 60 MHz | 190 MHz | 130 MHz |
| B2 | 1850 – 1910 MHz | 1930 – 1990 MHz | 60 MHz | 80 MHz | 20 MHz |
| B3 | 1710 – 1785 MHz | 1805 – 1880 MHz | 75 MHz | 95 MHz | 20 MHz |
| B4 | 1710 – 1755 MHz | 2110 – 2155 MHz | 45 MHz | 400 MHz | 355 MHz |
| B5 | 824 – 849 MHz | 869 – 894 MHz | 25 MHz | 45 MHz | 20 MHz |
| B6 | 830 – 840 MHz | 875 – 885 MHz | 10 MHz | 35 MHz | 25 MHz |
| B7 | 2500 – 2570 MHz | 2620 – 2690 MHz | 70 MHz | 120 MHz | 50 MHz |
| B8 | 880 – 915 MHz | 925 – 960 MHz | 35 MHz | 45 MHz | 10 MHz |
| B9 | 1749.9 – 1784.9 MHz | 1844.9 – 1879.9 MHz | 35 MHz | 95 MHz | 60 MHz |
| B10 | 1710 – 1770 MHz | 2110 – 2170 MHz | 60 MHz | 400 MHz | 340 MHz |
| B11 | 1427.9 – 1452.9 MHz | 1475.9 – 1500.9 MHz | 20 MHz | 48 MHz | 28 MHz |
| B12 | 698 – 716 MHz | 728 – 746 MHz | 18 MHz | 30 MHz | 12 MHz |
| B13 | 777 – 787 MHz | 746 – 756 MHz | 10 MHz | – 31 MHz | 41 MHz |
| B14 | 788 – 798 MHz | 758 – 768 MHz | 10 MHz | – 30 MHz | 40 MHz |
| B15 | 1900 – 1920 MHz | 2600 – 2620 MHz | 20 MHz | 700 MHz | 680 MHz |
| B16 | 2010 – 2025 MHz | 2585 – 2600 MHz | 15 MHz | 575 MHz | 560 MHz |
| B17 | 704 – 716 MHz | 734 – 746 MHz | 12 MHz | 30 MHz | 18 MHz |
| B18 | 815 – 830 MHz | 860 – 875 MHz | 15 MHz | 45 MHz | 30 MHz |
| B19 | 830 – 845 MHz | 875 – 890 MHz | 15 MHz | 45 MHz | 30 MHz |
| B20 | 832 – 862 MHz | 791 – 821 MHz | 30 MHz | – 41 MHz | 71 MHz |
| B21 | 1447.9 – 1462.9 MHz | 1495.9 – 1510.9 MHz | 15 MHz | 48 MHz | 33 MHz |
| B22 | 3410 – 3500 MHz | 3510 – 3600 MHz | 90 MHz | 100 MHz | 10 MHz |
| B23 | 2000 – 2020 MHz | 2180 – 2200 MHz | 20 MHz | 180 MHz | 160 MHz |
| B24 | 1625.5 – 1660.5 MHz | 1525 – 1559 MHz | 34 MHz | – 101.5 MHz | 135.5 MHz |
| B25 | 1850 – 1915 MHz | 1930 – 1995 MHz | 65 MHz | 80 MHz | 15 MHz |
| B26 | 814 – 849 MHz | 859 – 894 MHz | 35 MHz | 45 MHz | 10 MHz |
| B27 | 807 – 824 MHz | 852 – 869 MHz | 17 MHz | 45 MHz | 28 MHz |
| B28 | 703 – 748 MHz | 758 – 803 MHz | 45 MHz | 55 MHz | 10 MHz |
| B29 | N/A | 717 – 728 MHz | 11 MHz | N/A | N/A |
| B30 | 2305 – 2315 MHz | 2350 – 2360 MHz | 10 MHz | 45 MHz | 35 MHz |
| B31 | 452.5 – 457.5 MHz | 462.5 – 467.5 MHz | 5 MHz | 10 MHz | 5 MHz |
4G TDD-LTE Frequency Band Allocations
TDD LTE uses unpaired spectrums because the working frequency for transmitting (uplink) and receiving (downlink) is exactly the same. TDD LTE allocates different time slots as the guard band.
| TDD-LTE Band | Frequency | Band Width |
| B33 | 1900 – 1920 MHz | 20 MHz |
| B34 | 2010 – 2025 MHz | 15 MHz |
| B35 | 1850 – 1910 MHz | 60 MHz |
| B36 | 1930 – 1990 MHz | 60 MHz |
| B37 | 1910 – 1930 MHz | 20 MHz |
| B38 | 2570 – 2620 MHz | 50 MHz |
| B39 | 1880 – 1920 MHz | 40 MHz |
| B40 | 2300 – 2400 MHz | 100 MHz |
| B41 | 2496 – 2690 MHz | 194 MHz |
| B42 | 3400 – 3600 MHz | 200 MHz |
| B43 | 3600 – 3800 MHz | 200 MHz |
| B44 | 703 – 803 MHz | 100 MHz |