3 Definitions and abbreviations

29.2133GPPPolicy and charging control signalling flows and Quality of Service (QoS) parameter mappingRelease 17TS

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:

DRA binding: The PCRF routing information stored per UE or per PDN in the DRA, which include the user identity (UE NAI), the UE Ipv4 address and/or Ipv6 prefix, the APN (if available) and the selected PCRF identity for a certain IP-CAN Session.

Gateway Control Session: An association between a BBERF and a PCRF (when GTP is not used in the EPC), used for transferring access specific parameters, BBERF events and QoS rules between the PCRF and BBERF. In the context of this specification this is implemented by use of the Gxx procedures.

IP-CAN session: association between a UE and an IP network.
The association is identified by one or more UE Ipv4 addresses/ and/or Ipv6 prefix together with a UE identity information, if available, and a PDN represented by a PDN ID (e.g. an APN). An IP-CAN session incorporates one or more IP-CAN bearers. Support for multiple IP-CAN bearers per IP-CAN session is IP-CAN specific. An IP-CAN session exists as long as the related UE Ipv4 address and/or Ipv6 prefix are assigned and announced to the IP network.

Policy counter: A mechanism within the OCS to track spending applicable for a subscriber.

Policy counter status: A label whose values are not standardized and that is associated with a policy counter’s value relative to the spending limit(s) (the number of possible policy counter status values for a policy counter is one greater than the number of thresholds associated with that policy counter, i.e policy counter status values describe the status around the thresholds). This is used to convey information relating to subscriber spending from OCS to PCRF. Specific labels are configured jointly in OCS and PCRF.

RAN user plane congestion: RAN user plane congestion occurs when the demand for RAN resources exceeds the available RAN capacity to deliver the user data for a prolonged period of time.

NOTE: Short-duration traffic bursts is a normal condition at any traffic load level, and is not considered to be RAN user plane congestion. Likewise, a high-level of utilization of RAN resources (based on operator configuration) is considered a normal mode of operation and might not be RAN user plane congestion.

Restricted local operator services: communication services provided by an operator that involve either automated or human assistance (e.g. credit card billing, directory assistance, customer care) for which successful authentication is not necessary.

Spending limit: A spending limit is the usage limit of a policy counter (e.g. monetary, volume, duration) that a subscriber is allowed to consume.

Spending limit report: a notification, containing the current policy counter status generated from the OCS to the PCRF via the Sy reference point.

TDF session: An association between an IP-CAN session and the assigned TDF for the purpose of application detection and control by the PCRF . The association is identified by one UE Ipv4 address and/or Ipv6 prefix together with optionally a PDN represented by a PDN ID and a set of ADC rules to be applied by the TDF.

3.2 Abbreviations

For the purpose of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply:

ADC Application Detection and Control

AF Application Function

ARA Aggregated RUCI Report Answer

ARP Allocation and Retention Priority

ARR Aggregated RUCI Report Request

AVP Attribute-Value Pair

BBERF Bearer Binding and Event Reporting Function

CHEM Coverage and Handoff Enhancements using Multimedia error robustness feature

CSG Closed Subscriber Group

CSG ID Closed Subscriber Group Identity

CoA Care of Address

DRA Diameter Routing Agent

DRMP Diameter Routing Message Priority

DSCP Differentiated Services Code Point

DTS Data Transport Service

GBR Guaranteed Bitrate

GCS Group Communication Service

GCS AS Group Communication Service Application Server

H-AF Home AF

H-DRA Home DRA

H-PCRF Home PCRF

HPLMN Home PLMN

MBR Maximum Bitrate

MUA Modify UE context Answer

MUR Modify UE context Request

MPS Multimedia Priority Service

NBIFOM Network-based IP flow mobility

NRA Non-Aggregated RUCI Report Answer

NRR Non-Aggregated RUCI Report Request

PA Proxy Agent

PCC Policy and Charging Control

PCEF Policy and Charging Enforcement Function

PCRF Policy and Charging Rule Function

PGW PDN-Gateway

PFDF Packet Flow Description Function

RLOS Restricted Local Operator Services

QCI QoS Class Identifier

RCAF RAN Congestion Awareness Function

RUCI RAN User Plane Congestion Information

SCEF Service Capability Exposure Function

SDF Service Data Flow

SLA Spending Limit Answer

SLR Spending Limit Request

SNA Spending-Status Notification Answer

SSD Source Statistics Descriptor

SNR Spending-Status Notification Request

STA Session Termination Answer

TSSF Traffic Steering Support Function

STR Session Termination Request

TDF Traffic Detection Function

UDC User Data Convergence

UDR User Data Repository

V-AF Visited AF

V-DRA Visited DRA

V-PCRF Visited PCRF

VPLMN Visited PLMN