3 Definitions, symbols and abbreviations
29.5123GPP5G SystemRelease 18Session Management Policy Control ServiceStage 3TS
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].
5G QoS Flow: The finest granularity for QoS forwarding treatment in the 5G System. All traffic mapped to the same 5G QoS Flow receive the same forwarding treatment (e.g. scheduling policy, queue management policy, rate shaping policy, RLC configuration, etc.). Providing different QoS forwarding treatment requires separate 5G QoS Flow.
5G QoS Identifier: A scalar that is used as a reference to a specific QoS forwarding behaviour (e.g. packet loss rate, packet delay budget) to be provided to a 5G QoS Flow. This may be implemented in the access network by the 5QI referencing node specific parameters that control the QoS forwarding treatment (e.g. scheduling weights, admission thresholds, queue management thresholds, link layer protocol configuration, etc.).
Access Traffic Steering: The procedure that selects an access network for a new data flow and transfers the traffic of this data flow over the selected access network. Access traffic steering is applicable between one 3GPP access and one non-3GPP access.
Access Traffic Switching: The procedure that moves all traffic of an ongoing data flow from one access network to another access network in a way that maintains the continuity of the data flow. Access traffic switching is applicable between one 3GPP access and one non-3GPP access.
Access Traffic Splitting: The procedure that splits the traffic of a data flow across multiple access networks. When traffic splitting is applied to a data flow, some traffic of the data flow is transferred via one access and some other traffic of the same data flow is transferred via another access. Access traffic splitting is applicable between one 3GPP access and one non-3GPP access.
Application detection filter: A logic used to detect packets generated by an application based on extended inspection of these packets, e.g., header and/or payload information, as well as dynamics of packet flows. The logic is entirely internal to a UPF, and is out of scope of this specification.
Application identifier: An identifier, referring to a specific application detection filter.
Application service provider: A business entity responsible for the application that is being / will be used by a UE, which may be either an AF operator or has an association with the AF operator.
Binding: The association between a service data flow and the QoS Flow transporting that service data flow.
Binding mechanism: The method for creating, modifying and deleting bindings.
Charging control: The process of associating packets, belonging to a service data flow, to a charging key and applying online charging or offline charging, as appropriate.
Charging key: information used by the CHF for rating purposes.
Detected application traffic: An aggregate set of packet flows that are generated by a given application and detected by an application detection filter.
Dynamic PCC Rule: a PCC rule, for which the definition is provided to the SMF by the PCF.
Gating control: The process of blocking or allowing packets, belonging to a service data flow / detected application’s traffic, to pass through to the UPF.
MA PDU Session: A PDU Session that provides a PDU connectivity service, which can use one access network at a time, or simultaneously one 3GPP access network and one non-3GPP access network.
Monitoring key: information used by the SMF and PCF for usage monitoring control purposes as a reference to a given set of service data flows or application (s), that all share a common allowed usage on a per UE and DNN and S-NSSAI basis.
Operating System (OS): Collection of UE software that provides common services for applications.
Operating System Identifier (OSId): An identifier identifying the operating system.
PCC decision: A PCF decision for policy and charging control provided to the SMF (consisting of PCC rules and PDU Session related attributes), a PCF decision for access and mobility related control provided to the AMF, a PCF decision for UE access selection and PDU Session selection related policy provided to the UE or a PCF decision for background data transfer policy provided to the AF.
PCC rule: A set of information enabling the detection of a service data flow and providing parameters for policy control and/or charging control and/or other control or support information. The possible information is described in clause 6.3.1.
PDU Session: Association between the UE and a Data Network that provides a PDU connectivity service.
Policy control: The process whereby the PCF indicates to the SMF how to control the QoS Flow. Policy control includes QoS control and/or gating control.
Policy Control Request trigger report: a notification, possibly containing additional information, of an event which occurs that corresponds with a Policy Control Request trigger.
Policy Control Request trigger: defines a condition when the SMF shall interact again with the PCF.
Predefined PCC Rule: a PCC rule that has been provisioned directly into the SMF by the operator.
Redirection: Redirect the detected service traffic to an application server (e.g. redirect to a top-up / service provisioning page).
Service data flow: An aggregate set of packet flows carried through the UPF that matches a service data flow template.
Service data flow filter: A set of packet flow header parameter values/ranges used to identify one or more of the packet flows in the UPF. The possible service data flow filters are defined in clause 6.2.2.2.
Service data flow filter identifier: A scalar that is unique for a specific service data flow (SDF) filter within a PDU session.
Service data flow template: The set of service data flow filters in a PCC Rule or an application identifier in a PCC rule referring to an application detection filter in the SMF or in the UPF, required for defining a service data flow.
Service identifier: An identifier for a service. The service identifier provides the most detailed identification, specified for flow based charging, of a service data flow. A concrete instance of a service may be identified if additional AF information is available (further details to be found in clause 6.3.1).
For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.501 [2], subclause 3.1 apply:
Onboarding Standalone Non-Public Network
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].
ADC Application Detection and Control
5G-RG 5G Residential Gateway
AF Application Function
AMF Access and Mobility Management Function
API Application Programming Interface
ATSSS Access Traffic Steering, Switching, Splitting
ATSSS-LL ATSSS Low-Layer
BBF Broadband Forum
CHEM Coverage and Handoff Enhancements using Multimedia error robustness feature
CHF Charging Function
DDD Downlink Data Delivery
DDN Downlink Data Notification
DN-AAA Data Network Authentication, Authorization and Accounting
DNN Data Network Name
DS-TT Device-side TSN translator
DTS Data Transport Service
EAS Edge Application Server
ePDG evolved Packet Data Gateway
FN-RG Fixed Network Residential Gateway
GEO Geosynchronous Orbit
GFBR Guaranteed Flow Bit Rate
GUAMI Globally Unique AMF Identifier
HFC Hybrid Fiber Coax
HTTP Hypertext Transfer Protocol
I-SMF Intermediate SMF
LEO Low Earth Orbit
MA Multi-Access
MEO Medium Earth Orbit
MPTCP Multi-Path TCP Protocol
NAS Non-Access-Stratum
NEF Network Exposure Function
NF Network Function
NID Network Identifier
NRF Network Repository Function
NWDAF Network Data Analytics Function
NW-TT Network-side TSN translator
ON-SNPN Onboarding Standalone Non-Public Network
PCC Policy and Charging Control
PCF Policy Control Function
PFD Packet Flow Description
PFDF Packet Flow Description Function
PMIC Port Management Information Container
PSA PDU Session Anchor
PSAP Public Safety Answering Point
QoS Quality of Service
RTT Round-Trip Time
SDF Service Data Flow
SMF Session Management Function
SNPN Stand-alone Non-Public Network
S-NSSAI Single Network Slice Selection Assistance Information
SUPL Secure User Plane for Location
TNAN Trusted Non-3GPP Access Network
TWAN Trusted WLAN Access Network
TSC Time Sensitive Communication
TSCAI Time Sensitive Communication Assistance Information
TSCTSF Time Sensitive Communication and Time Synchronization Function
TSN Time Sensitive Networking
TSN GM TSN Grand Master
UDM Unified Data Management
UDR Unified Data Repository
UE User Equipment
UL CL UpLink CLassifier
UMIC User plane node Management Information Container
URLLC Ultra Reliable Low Latency Communication
W-5GAN Wireline 5G Access Network
W-5GBAN Wireline BBF Access Network
W-5GCAN Wireline 5G Cable Access Network
W-AGF Wireline Access Gateway Function