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TR 36.886RAN4
E-UTRA – Band 41 High Power UE (HPUE)

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V14.1.0 (Wzip)  2019/03  77 p.

WI Acronym:  FS_LTE_B41_HPUE
Rapporteur:  Mr. Humbert, John

Currently, 3GPP has defined only Power Class UE 3 as the type of UE supported for TDD LTE band 41 operations. This definition was based on aligning TDD LTE Band 41 UE power classes with prior work in 3GPP related to other bands. However, it should be mentioned that 3GPP UE Power Class 3 definition (i.e. 23dBm) was mainly driven to ensure backward compatibility with prior technologies (i.e. GSM/UMTS) so that network deployment topologies remain similar. Furthermore, maintaining the same power class UE definition (i.e. Class 3) as previous technologies would maintaining compliance with various national regulatory rulings, particularly in terms of SAR, for FDD LTE duplexing mode.
However, TDD LTE band 41 does not have any 3GPP legacy technologies associated with it, hence the backward compatibility consideration is not applicable in its case. Also, since band 41 is defined as a TDD LTE band, it is less susceptible to SAR levels that FDD LTE bands due to SAR definition. Therefore, defining a new UE power class with higher than 23dBm Tx power for TDD LTE Band 41 operations would not compromise any of 3GPP foundational work, while improving UE and network performance. It should also be mentioned that 3GPP has done similar work on other bands (i.e. band 14) when defining a higher power class UE, hence the concept presented in this document is a continuation of that process.
The present document carries out a feasibility analysis for defining a UE Power class 2 (i.e. 26dBm) for operation on TDD LTE band 41. The document analyses current and future technological advancements in the area of UE RF frontend components and architectures that enable such definition while maintaining 3GPP specification and other regulatory bodies' requirements. It should be emphasized that this proposal only relates to single carrier UL operations on TDD band 41 (i.e. TM-1/2 modes) without affecting current 3GPP definition for UL carrier aggregation on band 41.
The scope of the present document is to evaluate the feasibility of increasing UL TX power in Band 41 from 23dBm +/- 2dB (Power Class 3) to 26dBm +/-2dB (Power Class 2) as well as discuss impacts (if any) to other 3GPP bands and regulatory requirements.

full Table of Contents for  TR 36.886  Word version:   14.1.0

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1  ScopeWord-p. 7
2  References
3  Definitions and abbreviations
4  Background
5  Deployment and Coexistence StudiesWord-p. 9
5.1  General
5.2  Band 41Up
5.3  Band 7
5.4  Band 38Word-p. 10
5.5  Impact to TDD/FDD carrier aggregation band combinations
5.6  WiFi
5.7  Regulatory RequirementsWord-p. 11
5.8  Co-existence and compatibility of LTE systems deployed in the 2.5 GHz band
5.9  The impact of B41 HPUE on BS blocking requirementsWord-p. 21
5.10  Additional Coexistence ScenariosUp
5.10.1  Additional simulation assumptions for ACLR co-existence study
5.10.2  Simulation results for ACLR co-existence study
6  B41 HPUE transmitter characteristicsWord-p. 61
6.1  GeneralUp
6.2  Transmit power
6.3  Output power dynamicsWord-p. 73
6.5  Transmit signal quality
6.6  Output RF spectrum emissions
6.7  Transmit intermodulation
7  B41 HPUE receiver characteristicsUp
8  Other specification impacts (if applicable)Word-p. 76
9  Conclusion
A  Change historyWord-p. 77

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