The LTE frequency bands in 3GPP specifications for paired bands and unpaired bands. There are 17 paired bands and 8 unpaired bands defined currently and more bands will be added during the standardization process. Some bands are currently used by other technologies and LTE can coexist with the legacy technologies. Similarly, in Europe and in Asia, WCDMA was initially deployed in the new 2100 MHz band while the refarming to the existing 900 MHz started during 2007. LTE will likely start by using the new 2600 MHz band and refarming to 900 and 1800 MHz bands. In the best case in Europe there is in total a 565 MHz spectrum available for the mobile operators when including 900 MHz, 1800 MHz, 2100 MHz Frequency Division Duplex (FDD) and Time Division Duplex (TDD) bands and the new 2600 MHz allocation all together.
In the USA the WCDMA networks have been refarmed to 850 and 1900 MHz. The new
frequencies at 1700/2100 are also used for 3G deployment. LTE will be deployed using 700
and 1700/2100 bands, and later refarmed to the existing bands.
In Japan the LTE deployments start using the 2100 band followed later by 800, 1500 and
1700 bands.
Flexible bandwidth is desirable to take advantage of the diverse spectrum assets: refarming
typically requires a narrowband option below 5 MHz, while the new spectrum allocations could
take benefi t of a wideband option up to 20 MHz and higher data rates. It is also evident that
both FDD and TDD modes are required to take full benefi t of the available paired and unpaired
spectrum. These requirements are taken into account in the LTE system specification.
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| Frequency bands for paired bands in 3GPP specifications |
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| Frequency bands for unpaired bands in 3GPP specifications |
In the USA the WCDMA networks have been refarmed to 850 and 1900 MHz. The new
frequencies at 1700/2100 are also used for 3G deployment. LTE will be deployed using 700
and 1700/2100 bands, and later refarmed to the existing bands.
In Japan the LTE deployments start using the 2100 band followed later by 800, 1500 and
1700 bands.
Flexible bandwidth is desirable to take advantage of the diverse spectrum assets: refarming
typically requires a narrowband option below 5 MHz, while the new spectrum allocations could
take benefi t of a wideband option up to 20 MHz and higher data rates. It is also evident that
both FDD and TDD modes are required to take full benefi t of the available paired and unpaired
spectrum. These requirements are taken into account in the LTE system specification.
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