Content for TR 38.862 Word version: 17.1.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
4 Background
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...
1 Scope p. 7
The present document is a technical report on band combination handling and rule collection for RAN4 specifications. The purpose is to create a document to collect the rules of band combinations, which can be widely known not only by RAN4 but also by other 3GPP working groups or even by other industrial partners outside 3GPP. It aims to improve the band combination in the current RAN4 specifications and collect the rules what RAN4 has been achieved during the timescale of Rel-17.
This TR contains a band combination specific part. The agreements on the rules of specifying band combinations, and facilitate understanding of the complex notations of CA/DC combinations are provided.
2 References p. 7
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-210773, "New SID: Study on band combination handling in RAN4", RAN#91-e.
[3]
TR 38.817-01: "General aspects for User Equipment (UE) Radio Frequency (RF) for NR".
[4]
TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone".
[5]
TS 38.101-2: "NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone".
[6]
TS 38.101-3: "NR; User Equipment (UE) radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios".
[7]
RP-202832, "New WID: Introduction of bandwidth combination set 4 (BCS4) for NR", RAN#90-e.
3 Definitions of terms, symbols and abbreviations p. 7
3.1 Terms p. 7
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.
Aggregated Channel Bandwidth:
The RF bandwidth in which a UE transmits and receives multiple contiguously aggregated carriers.
Carrier aggregation:
Aggregation of two or more component carriers in order to support wider transmission bandwidths.
Carrier aggregation band:
A set of one or more operating bands across which multiple carriers are aggregated with a specific set of technical requirements.
Carrier aggregation bandwidth class:
A class defined by the aggregated transmission bandwidth configuration and maximum number of component carriers supported by a UE.
Carrier aggregation configuration:
A combination of CA operating band(s) and CA bandwidth class(es) supported by a UE.
Contiguous carriers:
A set of two or more carriers configured in a spectrum block where there are no RF requirements based on co-existence for un-coordinated operation within the spectrum block.
Fallback group:
Group of carrier aggregation bandwidth classes for which it is mandatory for a UE to be able to fallback to lower order CA bandwidth class configuration. It is not mandatory for a UE to be able to fallback to lower order CA bandwidth class configuration that belong to a different fallback group.
Inter-band carrier aggregation:
Carrier aggregation of component carriers in different operating bands.
Intra-band contiguous carrier aggregation:
Contiguous carriers aggregated in the same operating band.
Intra-band non-contiguous carrier aggregation:
Non-contiguous carriers aggregated in the same operating band.
Sub-block:
This is one contiguous allocated block of spectrum for transmission and reception by the same UE. There may be multiple instances of sub-blocks within an RF bandwidth.
3.2 Symbols p. 8
For the purposes of the present document, the following symbols apply:
ΔRB,cI
Allowed reference sensitivity relaxation due to support for CA or DC operation, for serving cell c.
ΔTIB,c
Allowed maximum configured output power relaxation due to support for CA or DC operation, for serving cell c.
BWChannel
Channel bandwidth.
BWChannel_CA
Aggregated channel bandwidth, expressed in MHz.
Max()
The largest of given numbers.
Min()
The smallest of given numbers.
NRB
Transmission bandwidth configuration, expressed in units of resource blocks.
3.3 Abbreviations p. 8
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.
BCS
Bandwidth Combination Set.
BS
Base Station.
BW
Bandwidth.
CA
Carrier aggregation.
CA_nX-nY
Inter-band CA of component carrier(s) in one sub-block within Band nX and component carrier(s) in one sub-block within Band nY where nX and nY are the applicable NR operating bands.
CC
Component carrier.
CR
Change Request.
DC
Dual Connectivity.
DL
Downlink.
E-UTRA
Evolved Universal Terrestrial Radio Access.
EN-DC
E-UTRA/NR DC.
FDM
Frequency Division Multiplexing.
FR
Frequency Range.
HPUE
High Power UE.
LTE
Long Term Evolution.
MOP
Maximum Output Power.
MR-DC
Multi-radio DC.
NBC
Non-backwards Compatible.
NE-DC
NR/E-UTRA DC.
NR
New Radio.
NR-DC
NR/NR DC.
PC
Power Class.
RF
Radio Frequency.
Rx
Receiver.
SCS
Subcarrier spacing.
SUL
Supplementary uplink.
SR
Status Report.
TDM
Time Division Multiplex.
TP
Text Proposal.
Tx
Transmitter.
UE
User Equipment.
UL
Uplink.
ULSUP
Uplink sharing from UE perspective.
V2X
Vehicle to Everything.
WI
Work Item.
WID
Work Item Description.
4 Background p. 9
At 3GPP RAN#91-e meeting, a new Rel-17 Study Item "Study on band combination handling in RAN4" was approved. The objectives are as follows,
- Study the adequate information on what needs for introducing band combinations and capture TP formats.
- Collect agreements on the rules and guidelines of specifying band combinations, such as the notations of CA/DC combinations, etc.
- Analyse and identify the redundant contents in RAN4 specifications.
- Study potential future-proof solutions for band combination configuration tables in RAN4 specifications for concise representation, better readability and better trackability and editability.
