Content for TR 38.841 Word version: 17.0.0

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1 Scope p. 9

The present document is a technical report for high power UE (power class 2) for NR inter-band Carrier Aggregation with 2 bands downlink and 2 bands uplink under Rel-17 time frame. The purpose is to gather the relevant background information and studies in order to address power class 2 NR inter-band CA for 2 bands DL with 2 bands UL in Table 1-1.

Table 1-1: Rel-17 power class 2 NR 2BDL/2BUL inter-band CA

NR CA configuration	Uplink CA configuration	Power class 2 cases	Release independent from
CA_nXA-nYA	CA_nXA-nYA

The allowed maximum output power by each of carrier for power class 2 cases is listed in Table 1-2.

Table 1-2: Maximum output power for power class 2 cases

Power class 2 cases for CA_nXA-nYA	CA power class	Carrier X power class	Carrier Y power class
Case a	26dBm	23dBm	23dBm
Case b	26dBm	23dBm	26dBm
Case c	26dBm	26dBm	23dBm
Case d	26dBm	26dBm	26dBm
NOTE: The Carrier X and Y are one-by-one corresponding to carriers in CA configuration of CA_nXA-nYA.

2 References p. 9

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

3 Definitions of terms, symbols and abbreviations p. 9

3.1 Terms p. 9

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3.2 Symbols p. 10

For the purposes of the present document, the following symbols apply:

ΔRIB,c

Allowed reference sensitivity relaxation due to support for inter-band CA operation, for serving cell c.

ΔTIB,c

Allowed maximum configured output power relaxation due to support for inter-band CA operation, for serving cell c.

3.3 Abbreviations p. 10

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

Base Station

BCS

Bandwidth Combination Set

Carrier Aggregation

Component Carriers

Dual Connectivity

Downlink

FDD

Frequency Division Duplex

MPR

Allowed maximum power reduction

MSD

Maximum Sensitivity Degradation

REFSENS

Reference Sensitivity power level

SCS

Subcarrier spacing

TDD

Time Division Duplex

User Equipment

Uplink

4 Background p. 10

At 3GPP RAN #89-e meeting, a basket Work Item on "High power UE (power class 2) for NR inter-band Carrier Aggregation with 2 bands downlink and 2 bands uplink" was approved for Rel-17, of which the objectives are as follows:

Specify the band-combination specific RF requirements for all listed power class 2 NR inter-band UL CA, the requirements that need to analyse and specify include

Maximum output power, configured transmitted power.
Analysing combinations that have self-desensitization, applicable ΔTIB, c and ΔRIB, c and reference sensitivity exceptions including MSD test cases.
Other additional impact to the requirements due to the high power on UL, if necessary

The present document is a technical report for this basket Work Item, and aims to study the band-combination specific requirements for each of combinations captured in Table 1-1.

4.1 TR Maintenance p. 10

A single company is responsible for introducing all approved TPs in the current TR, i.e. TR editor. However, it is the responsibility of the contact person of each band/band combination to ensure that the TPs related to the band/band combination have been implemented.