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.
For the purposes of the present document, the terms and definitions 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.
A communication to support A2X services leveraging PC5 reference points, as defined in TS 23.256. A2X services are realized by various types of A2X applications, e.g., BRID or DAA.
Air to Ground network:
An NG-RAN consisting of ground-based gNBs, which provide cell towers that send signals up to an aircraft's antenna(s) of onboard ATG terminal, with typical vertical altitude of around 10,000 m and take-off/landing altitudes down to 3000 m.
BWP for SRS for positioning Tx frequency hopping:
For SRS for positioning Tx frequency hopping, separate BWP configuration outside BWP configuration for data transmission.
The dormant BWP is one of downlink BWPs configured by the network via dedicated RRC signaling. In the dormant BWP, the UE stop monitoring PDCCH on/for the SCell, but continues performing CSI measurements, Automatic Gain Control (AGC) and beam management, if configured.
A group of Serving Cells that is configured by RRC and that have the same DRX Active Time.
HARQ information for DL-SCH, for UL-SCH, or for SL-SCH transmissions consists of New Data Indicator (NDI), Transport Block Size (TBS), Redundancy Version (RV), and HARQ process ID.
gNB that provides network access to UEs via a network of backhaul and access links.
RAN node that supports NR access links to UEs and NR backhaul links to parent nodes and child nodes.
Listen Before Talk:
A procedure according to which transmissions are not performed if the channel is identified as being occupied, see TS 37.213.
LTM candidate cell:
A candidate cell configured for LTM as defined in TS 38.331.
Message transmitted on UL-SCH containing a C-RNTI MAC CE or CCCH SDU, submitted from upper layer and associated with the UE Contention Resolution Identity, as part of a Random Access procedure.
Mode of operation of a remote UE in RRC_CONNECTED configured with one direct path on which the UE connects to gNB using NR Uu, and one indirect path on which the UE connects to the same gNB via a relay UE using L2 U2N relay operation or non-3GPP connectivity (N3C).
Multi-path U2N N3C relay:
AS functionality providing both direct path and indirect path via relay UE with non-3GPP connectivity.
Multi-PUSCH configured grant:
A configured grant configuration that includes multiple consecutive configured uplink grants within a single periodicity.
NCR-node function, which performs amplifying-and-forwarding of UL/DL RF signals between gNB and UE. The behavior of the NCR-Fwd is controlled according to the side control information received by the NCR-MT from a gNB.
NCR-node entity which communicates with a gNB via a control link to receive side control information. The control link is based on NR Uu interface.
RAN node comprising NCR-MT and NCR-Fwd.
An NG-RAN consisting of gNBs, which provide non-terrestrial NR access to UEs by means of an NTN payload embarked on an airborne or space-borne NTN vehicle and an NTN Gateway.
NR backhaul link:
NR link used for backhauling between an IAB-node and an IAB-donor, and between IAB-nodes in case of a multi-hop backhauling.
NR sidelink communication:
AS functionality enabling at least V2X Communication as defined in TS 23.287 and ProSe communication (including ProSe non-Relay, UE-to-Network Relay and UE-to-UE Relay communication (including ProSe UE-to-UE Relay communication with integrated discovery)) as defined in TS 23.304, between two or more nearby UEs, using NR technology but not traversing any network node.
NR sidelink discovery:
AS functionality enabling ProSe non-Relay discovery, ProSe UE-to-Network Relay discovery and ProSe UE-to-UE Relay discovery for Proximity based Services as defined in TS 23.304, between two or more nearby UEs, using NR technology but not traversing any network node.
NR sidelink transmission:
Any NR Sidelink-based transmission, including transmission for NR sidelink discovery, transmission for NR sidelink communication, transmission of SL-PRS, and transmission for A2X communication.
A time duration (i.e. one or a consecutive number of symbols) during which the MAC entity is configured to monitor the PDCCH.
Positioning SRS Bandwidth Aggregation:
Transmission of positioning SRS on multiple carriers in RRC_CONNECTED and RRC_INACTIVE where the positioning SRS resources are linked in RRC configuration as defined in TS 38.331.
PRS Processing Window:
A time window during which UE may perform PRS measurement inside the active DL BWP with the same numerology as the active DL BWP without measurement gap.
AS functionality enabling ranging-based services and sidelink positioning as specified in TS 23.586.
A RB set refers to a contiguous set of resource blocks (RBs) on which a channel access procedure is performed in shared spectrum as defined in TS 37.213.
Sidelink transmission information included in an SCI for an SL-SCH transmission or SL-PRS transmission with or without SL-SCH transmission on SL-PRS shared resource pool as specified in clause 8.3 and 8.4 of TS 38.212 consists of Sidelink HARQ information including NDI, RV, Sidelink process ID, HARQ feedback enabled/disabled indicator, Sidelink identification information including cast type indicator, Source Layer-1 ID and Destination Layer-1 ID, and Sidelink other information including CSI request, SL-PRS request, SL-PRS resource ID, a priority, a communication range requirement and Zone ID.
SL-PRS delay budget:
Delay budget before which the SL-PRS is expected to be transmitted by the Tx UE.
SL-PRS dedicated resource pool:
A sidelink resource pool which can be used for the transmission of SL-PRS and cannot be used for the transmission of PSSCH.
SL-PRS shared resource pool:
A sidelink resource pool which can be used for the transmission of both SL-PRS and PSSCH.
SL-PRS transmission information on SL-PRS dedicated resource pool:
SL-PRS transmission information on SL-PRS dedicated resource pool is included in an SCI for an SL-PRS transmission on SL-PRS dedicated resource pool, as specified in TS 38.212, consisting of
SL-PRS identification information, including cast type indicator, source ID and destination ID;
SL-PRS transmission other information, including SL-PRS priority, SL-PRS request, SL-PRS resource ID and resource reservation period.
SRS for positioning Tx frequency hopping:
Transmit frequency hopping of positioning SRS in RRC_INACTIVE and RRC_CONNECTED.
SRS positioning validity area:
An area consisting of a list of cells within which the corresponding positioning SRS configuration is considered as valid.
For Dual Connectivity operation the term Special Cell refers to the PCell of the MCG or the PSCell of the SCG depending on if the MAC entity is associated to the MCG or the SCG, respectively. Otherwise the term Special Cell refers to the PCell. A Special Cell supports PUCCH transmission and contention-based Random Access, and is always activated.
Timing Advance Group:
A group of Serving Cells that is configured by RRC and that, for the cells with a UL configured, using the same timing reference cell and the same Timing Advance value. A Timing Advance Group containing the SpCell of a MAC entity is referred to as Primary Timing Advance Group (PTAG), whereas the term Secondary Timing Advance Group (STAG) refers to other TAGs.
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.
Beam Failure Recovery
Broadcast Remote Identification
Buffer Status Report
Configured Grant-based SDT
Cancellation Indication RNTI
Channel State Information
CSI Interference Measurement
CSI Reference Signal
Configured Scheduling RNTI
Detect And Avoid
Dual Active Protocol Stack
DCI with CRC scrambled by PS-RNTI
DownLink-Positioning Reference Signal
Delay Status Report
Group Configured Scheduling RNTI
Integrated Access and Backhaul
Listen Before Talk
Logical Channel Group
Logical Channel Prioritization
L1/L2 Triggered Mobility
MBS Control Channel
MBS Control Channel RNTI
Master Cell Group
Mobile Originated SDT
Maximum Permissible Exposure
MBS Traffic Channel
Mobile Terminated SDT
Non Cell Defining SSB
Network Slice AS Group
Non-Zero Power CSI-RS
Packet Delay Budget
Paging Early Indication RNTI
Power Headroom Report
PC5 QoS Identifier
Power Saving RNTI
PDU Set Importance
Primary Timing Advance Group
Point to Multipoint
Point to Point
PRS Processing Window
Positioning Reference Signal
Random Access-based SDT
Remote Radio Head
Secondary Cell Group
Small Data Transmission
Slot Format Indication RNTI
SL-PRS Configured Scheduling RNTI
Sidelink Configured Scheduling RNTI
Semi-Persistent CSI RNTI
SRS Resource Indicator
Synchronization Signal Block
Secondary Timing Advance Group
Timing Advance Group
Transmission Configuration Indicator
Transmit Power Control-Sounding Reference Signal-RNTI