Content for TR 38.872 Word version: 18.4.0

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1 Scope p. 8

The present document is the technical report for the study on enhancement for 700/800/900MHz band combinations [2] and sub-1GHz NR band combinations [5] under R18 time frame. The purpose is to gather the relevant background information and studies in order to address the study on enhancement for 600/700/800/900MHz band combinations in Table 1-1.

Table 1-1: Band combinations in the SI

Configuration	Uplink configuration
CA_n8-n20-n28	CA_n8-n20, CA_n8-n28, CA_n20-n28
CA_n5-n8	CA_n5-n8
CA_n5-n28	CA_n5-n28
CA_n5A-n105A	CA_n5A-n105A
CA_n28A-n105A	single UL in either n28 or n105
CA_n26A-n28A	CA_n26A-n28A
CA_n5A-n28A-n105A	CA_n5A-n28A
CA_n5A-n28A-n105A	CA_n5A-n105A
CA_n5A-n28A-n105A	single UL in either n28 or n105

2 References p. 8

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".

[2]

RP-221464: "Revised SI: Study on enhancement for 700/800/900MHz band combinations for NR", RAN#96

[3]

TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone".

[4]

TS 38.101-3: "NR; User Equipment (UE) radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios".

[5]

RP-230789: "Study on enhancement for sub-1Ghz NR band combinations". RAN 99

[6]

TR 38.892: APT 600 MHz NR band.

[7]

R4-2308581: Discussion on RF architecture and potential MSD issues for CA_n5-n105, Huawei, HiSilicon, Spark NZ

[8]

R4-2309299: Input on CA_n5-n105 cross-band MSD and DeltaT/R, Skyworks Solutions Inc.

[9]

R4-2309356: Considerations on CA_n5-n105, Qualcomm France

[10]

R4-2309358: Considerations on CA_n26-n28, Qualcomm France

[11]

R4-2306468: WF on CA_n5-n28 and CA_n8-n20-n28, Huawei, HiSilicon

[12]

R4-2308583: Discussion on RF architecture and potential MSD issues for CA_n26-n28, Huawei, HiSilicon

[13]

R4-2307477: Input on CA_n26-n28 requirements, Skyworks Solutions Inc.

[14]

R4-2306470: WF on RF architecture and critical issues for CA_n28-n105

[15]

R4-2312979: Discussion on RF architecture and potential MSD issues for CA_n5-n28-n105

[16]

R4-2311755: requirements for LBLBLB CA_n5-n28-n105

[17]

R4-2303576: TP for CA_n26-n28, MediaTek Inc.

[18]

R4-2311116: CA_n26-n28 cross band MSD based on measurements, Skyworks Solutions Inc.

[19]

R4-2311753: MSD analysis for CA_n5-n105, CA_n28-n105, and CA_n26-n28, Apple Inc.

[20]

R4-2313371: Considerations on CA_n26-n28, Qualcomm France

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. 9

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, inter-band NR-DC operation and due to support for SUL operations, for serving cell c

3.3 Abbreviations p. 9

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.

MRC

Maximum Ratio Combining

MSD

Maximum Sensitivity Degradation

Resource Block

User Equipment