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Band 11 (UE transmit: 1427.9 - 1447.9MHz, BS transmit: 1475.9 - 1495.9MHz) and Band 21 (UE transmit: 1447.9 - 1462.9MHz, BS transmit: 1495.9 - 1510.9MHz) have been used for LTE operation in Japan.
At the ITU World Radiocommunication Conference in 2015 (WRC-15), the frequency band 1427 - 1518 MHz
(hereafter, L-band) was identified for International Mobile Telecommunications (IMT). In accordance with this
outcome at WRC-15, ITU-R Working Party 5D (WP 5D) initiated to revise Recommendation ITU-R M.1036-5
"Frequency arrangements for implementation of the terrestrial component of International Mobile Telecommunications
(IMT) in the bands identified for IMT in the Radio Regulations". For this revision, Japan proposed to include a new
FDD arrangement, which covers a wider frequency range compared to the Bands 11 and 21 and enables to fully utilize
the entire identified L-band to the extent possible.
In the 20th meeting of APT Wireless Group (AWG-20), Japan also proposed to initiate a study on this new FDD
arrangement for the Asia-Pacific countries. Through the proposal, some administrations in the Asia-Pacific region
expressed interest in developing such an FDD arrangement in the L-band.
In 3GPP, the Study Item "Feasibility study on global application of LTE Band 11 and of LTE Band 21 UEs" (RP161220) was approved in June 2016 and plans to be finalized in December 2016. In the study, required transmission
restrictions of UE to meet the unwanted emission limit (- 62dBW/27MHz with UE transmit power of 15dBm.) for
protection of the Earth Exploration-Satellite Service (EESS) was investigated. According to results of the study, the
required restriction is not extended to force to use PUCCH overprovision method, and thus, an implementation of an
FDD arrangement in the L-band is a realistic option while achieving the protection of the EESS. Furthermore, these
results also indicate that no UE transmission restriction is required for IoT use cases, such as Category M1 and NB1.
This is favourable characteristics as the L-band may be used for IoT applications as well considering the timeframe
when the spectrum is assigned to the operators.
full Table of Contents for TR 36.751 Word version: 15.0.0