The LTE_NR_Simult_RxTx work item specifies the principles for simultaneous Rx/Tx UE capability for FDD-TDD or TDD-TDD band combinations s for which can support or not support simultaneous Rx/Tx for FR1, FR2 and FR1+FR2 and for each FDD-TDD and TDD-TDD band combinations for CA, SUL, MR-DC and simultaneous Rx/Tx capability NR-DC band combinations.

The 3GPP summary of Rel-17 Work Items (TR 21.917) contains a whole section on 5G services for the verticals.

Positioning Enhancements:

3GPP Rel-16 specified various location technologies to support regulatory as well as commercial use cases. TS 22.261 includes the positioning requirements for high accuracy, high availability and low latency. TSG RAN Rel-17 target positioning requirements include horizontal/vertical positioning accuracy, physical layer and higher layer end-to-end positioning latency and GNSS positioning integrity (TR38.857).

5GC Location Services

During Rel-16, Working Group SA2 studied enhancements to 5GC location services and the agreed conclusions have been specified in TS23.273 “5G System Location Services (LCS)”.

Dynamic spectrum sharing (DSS) provides a very useful migration path from LTE to NR by allowing LTE and NR to share the same carrier. DSS was included already in Rel-15 and further enhanced in Rel-16. As the number of NR devices in a network increases it is important that sufficient scheduling capacity for NR UEs on the shared carriers is ensured.

This is addressed by the NR_DSS Work Item (WI), which introduces the support for cross-carrier scheduling from SCell to PCell/PSCell.

 

860043	NR Dynamic spectrum sharing (DSS)	NR_DSS		RP-211345
860143	Core part: NR DSS	NR_DSS-Core	R1

 

When cross-carrier scheduling from an SCell to sPCell is configured:

• PDCCH on that SCell can schedule sPCell’s PDSCH and PUSCH,

• PDCCH on the sPCell can schedule sPCell’s PDSCH and PUSCH but cannot schedule PDSCH and PUSCH on any other cell.

Only one SCell can be configured to be used for cross-carrier scheduling to sPCell.

The maximum number of monitoring candidates and non-overlapping CCEs for PDCCH monitoring (to schedule the sPCell) are split between the sPCell and the SCell used for scheduling the sPCell. The split is indicated via an RRC configured scaling factor.

Note: sPCell refers to ‘Special Cell’. For Dual Connectivity operation the term Special Cell refers to the PCell of the MCG or the PSCell of the SCG, otherwise the term Special Cell refers to the PCell.

References

List of related CRs: select "TSG Status = Approved" in: https://portal.3gpp.org/ChangeRequests.aspx?q=1&workitem=860043,860143

Acronyms

PCell / SCell Primary Cell / Secondary Cell

PDCCH Physical Downlink Control channel

PDSCH Physical Downlink Shared channel

PSCell Primary SCG Cell

PUSCH Physical Uplink Shared channel

SCG Secondary Cell Group

sPCell Special Cell

3GPP Work Plan:

See a listing of all work & study items here: https://www.3gpp.org/ftp/Information/WORK_PLAN/ and search for ‘DSS’ in the acronym field of the Excel sheet there.

Working Groups:

RAN1

3GPP Release:

Rel-19

Rel-18

Rel-17

See also:

Impacted existing specifications:

TS	Description of change
38.211 NR; Physical channels and modulation	L1 functionality to support the DSS enhancements
38.212 NR; Multiplexing and channel coding	L1 functionality to support the DSS enhancements
38.213 NR; Physical layer procedures for control	L1 functionality to support the DSS enhancements
38.214 NR; Physical layer procedures for data	L1 functionality to support the DSS enhancements
38.331 NR; Radio Resource Control (RRC); Protocol specification	RRC signalling to support the DSS enhancements
38.300 NR; NR and NG-RAN Overall description; Stage-2	Stage 2 spec updates to support the DSS enhancements
38.306 NR; User Equipment (UE) radio access capabilities	UE capability updates to support the DSS enhancements

 

Work on AI is now well established in 3GPP, with studies and specifications expected in Release 18 that will move standards towards providing processes that make full use of the predictive power of data.

Both TSG RAN and TSG SA groups have drawn up specific descriptions of the features needed to embrace both Artificial Intelligence and its class-mate Machine Learning.