For the purposes of the present document, the abbreviations given in TR 21.905
, in TS 36.300
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
and TS 36.300
5G Core Network
5G QoS Identifier
Authentication and Key Agreement
Aggregate Maximum Bit Rate
Adaptive Modulation and Coding
Access and Mobility Management Function
Allocation and Retention Priority
Bandwidth reduced Low complexity
Binary Phase Shift Keying
Closed Access Group
Channel Access Priority Class
Contention Based Random Access
Control Channel Element
Cell Defining SSB
Contention Free Random Access
Cellular Internet of Things
Cross Link interference
Commercial Mobile Alert Service
Control Resource Set
Conditional PSCell Change
Directed Acyclic Graph
Dual Active Protocol Stack
Discrete Fourier Transform
Downlink Control Information
DCI with CRC scrambled by PS-RNTI
Downlink Shared Channel
Downlink Time Difference Of Arrival
Demodulation Reference Signal
Enhanced Cell-ID (positioning method)
Ethernet Header Compression
Earthquake and Tsunami Warning System
Guaranteed Flow Bit Rate
Human-Readable Network Name
Integrated Access and Backhaul
Korean Public Alarm System
Low Density Parity Check
Maximum Data Burst Volume
Master Information Block
Mobile Initiated Connection Only
Maximum Flow Bit Rate
Mobile Network Operator
Multi User MIMO
Multi-Round Trip Time
Narrow Band Internet of Things
NR Cell Global Identifier
Neighbour Cell Relation
Neighbour Cell Relation Table
NG Application Protocol
NR Radio Access
Physical Cell Identifier
Physical Downlink Control Channel
Physical Downlink Shared Channel
Public Land Mobile Network
Public Network Integrated NPN
Physical Random Access Channel
Physical Resource Block
Precoding Resource block Group
Power Saving RNTI
Primary Synchronisation Signal
Physical Uplink Control Channel
Physical Uplink Shared Channel
Public Warning System
Quadrature Amplitude Modulation
QoS Flow ID
Quadrature Phase Shift Keying
Random Access RNTI
Random Access Channel
RAN-based Notification Area Code
Resource Element Group
Remote Interference Management
Remaining Minimum SI
RAN-based Notification Area
RAN-based Notification Area Update
Radio Network Temporary Identifier
Reflective QoS Attribute
Reflective Quality of Service
Reference Signal Received Power
Reference Signal Received Quality
Received Signal Strength Indicator
Reference Signal Time Difference
Service Data Adaptation Protocol
Slot Format Indication RNTI
System Information Block
System Information RNTI
Service Level Agreement
Security Mode Command
Session Management Function
Single Network Slice Selection Assistance Information
Stand-alone Non-Public Network
Stand-alone Non-Public Network Identity
Sounding Reference Signal
Single Radio Voice Call Continuity
Secondary Synchronisation Signal
Single User MIMO
Transmit Power Control
Uplink Control Information
Uplink Angles of Arrival
Uplink Relative Time of Arrival
Uplink Shared Channel
User Plane Function
Ultra-Reliable and Low Latency Communications
Xn Application Protocol
3.2 Definitions Word‑p. 14
For the purposes of the present document, the terms and definitions given in TR 21.905
, in TS 36.300
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
and TS 36.300
BH RLC channel:
an RLC channel between two nodes, which is used to transport backhaul packets.
a PLMN cell broadcasting at least one Closed Access Group identity.
CAG Member Cell:
for a UE, a CAG cell broadcasting the identity of the selected PLMN, registered PLMN or equivalent PLMN, and for that PLMN, a CAG identifier belonging to the Allowed CAG list of the UE for that PLMN.
a CAG cell that is only available for normal service for CAG UEs.
an SSB with an RMSI associated.
IAB-DU's and IAB-donor-DU's next hop neighbour node; the child node is also an IAB-node.
Conditional Handover (CHO):
a handover procedure that is executed only when execution condition(s) are met.
the control resource set for at least SIB1 scheduling, can be configured either via MIB or via dedicated RRC signalling.
a handover procedure that maintains the source gNB connection after reception of RRC message for handover and until releasing the source cell after successful random access to the target gNB.
Direction toward child node or UE in IAB-topology.
Early Data Forwarding:
data forwarding that is initiated before the UE executes the handover.
node providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC.
gNB that provides network access to UEs via a network of backhaul and access links.
gNB-DU functionality supported by the IAB-node to terminate the NR access interface to UEs and next-hop IAB-nodes, and to terminate the F1 protocol to the gNB-CU functionality, as defined in TS 38.401
, on the IAB-donor.
IAB-node function that terminates the Uu interface to the parent node using the procedures and behaviours specified for UEs unless stated otherwise. IAB-MT function used in 38-series of 3GPP Specifications corresponds to IAB-UE function defined in TS 23.501
RAN node that supports NR access links to UEs and NR backhaul links to parent nodes and child nodes. The IAB-node does not support backhauling via LTE.
Handover that does not involve a CN change (EPC or 5GC).
Handover that involves a CN change (EPC or 5GC).
Late Data Forwarding:
data forwarding that is initiated after the source NG-RAN node knows that the UE has successfully accessed a target NG-RAN node.
preamble transmission of the random access procedure for 4-step random access (RA) type.
first scheduled transmission of the random access procedure.
preamble and payload transmissions of the random access procedure for 2-step RA type.
response to MSGA in the 2-step random access procedure. MSGB may consist of response(s) for contention resolution, fallback indication(s), and backoff indication.
Using a chain of NR backhaul links between an IAB-node and an IAB-donor.
node providing E-UTRA user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC.
control plane interface between NG-RAN and 5GC.
user plane interface between NG-RAN and 5GC.
either a gNB or an ng-eNB.
a PLMN cell which does not broadcast any Closed Access Group identity.
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
, between two or more nearby UEs, using NR technology but not traversing any network node.
corresponds to one subcarrier spacing in the frequency domain. By scaling a reference subcarrier spacing by an integer N, different numerologies can be defined.
IAB-MT's next hop neighbour node; the parent node can be IAB-node or IAB-donor-DU.
a cell of the PLMN.
SNPN Access Mode:
mode of operation whereby a UE only accesses SNPNs.
a cell that is only available for normal service for SNPN subscribers.
the identity of Stand-alone NPN defined by the pair (PLMN ID, NID).
Direction toward parent node in IAB-topology.
V2X sidelink communication:
AS functionality enabling V2X communication as defined in TS 23.285
, between nearby UEs, using E-UTRA technology but not traversing any network node.
network interface between NG-RAN nodes.