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Content for  TS 23.203  Word version:  17.2.0

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0  Introductionp. 14

Policy and Charging Control functionality encompasses two main functions:
  • Flow Based Charging, including charging control and online credit control, for service data flows and application traffic;
  • Policy control (e.g. gating control, QoS control, QoS signalling, etc.).
The present document specifies the generic PCC aspects within the body, while the specifics for each type of IP-CAN are specified in Annexes. For one type of IP-CAN the corresponding clause in an Annex shall be understood to be a realization of the TS main body. The Annexes are therefore not stand-alone specifications for an IP-CAN. Annexes may specify additional restrictions to the specification body.
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1  Scopep. 15

The present document specifies the overall stage 2 level functionality for Policy and Charging Control that encompasses the following high level functions for IP-CANs (e.g. GPRS, Fixed Broadband, EPC, etc.):
  • Flow Based Charging for network usage, including charging control and online credit control, for service data flows and application traffic;
  • Policy control (e.g. gating control, QoS control, QoS signalling, etc.).
The present document specifies the Policy and Charging Control functionality for Evolved 3GPP Packet Switched domain, including both 3GPP accesses GERAN/UTRAN/E-UTRAN and Non-3GPP accesses, according to TS 23.401 and TS 23.402.
The present document specifies functionality for unicast bearers. Broadcast and multicast bearers, such as MBMS contexts for GPRS, are out of scope of the present document.
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2  Referencesp. 15

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.
[1]
TS 41.101: "Technical Specifications and Technical Reports for a GERAN-based 3GPP system".
[2]  Void.
[3]
TS 32.240: "Telecommunication management; Charging management; Charging architecture and principles".
[4]
RFC 4006:  "Diameter Credit-Control Application".
[5]
TS 23.207: "End-to-end Quality of Service (QoS) concept and architecture".
[6]
TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description".
[7]
TS 23.125: "Overall high level functionality and architecture impacts of flow based charging; Stage 2".
[8]
TR 21.905: "Vocabulary for 3GPP Specifications".
[9]
TS 32.251: "Telecommunication management; Charging management; Packet Switched (PS) domain charging".
[10]
TS 29.061: "Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)".
[11]
TR 33.919: "3G Security; Generic Authentication Architecture (GAA); System description".
[12]
TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".
[13]  Void.
[14]
TS 23.107: "Quality of Service (QoS) concept and architecture".
[15]
"WiMAX End-to-End Network Systems Architecture" (http://www.wimaxforum.org/technology/documents).
[16]
TS 23.003: "Numbering, addressing and identification".
[17]
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
[18]
TS 23.402: "Architecture Enhancements for non-3GPP accesses".
[19]
TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2".
[20]
3GPP2 X.S0057-B v2.0: "E-UTRAN - HRPD Connectivity and Interworking: Core Network Aspects", July 2014.
[21]
TS 23.167: "IP Multimedia Subsystem (IMS) emergency sessions".
[22]
TS 29.213: "Policy and Charging Control signalling flows and QoS parameter mapping".
[23]
TS 23.261: "IP Flow Mobility and seamless WLAN offload; Stage 2".
[24]
TS 23.198: "Open Service Access (OSA); Stage 2".
[25]
TS 23.335: "User Data Convergence (UDC); Technical realization and information flows; Stage 2".
[26]
TS 29.335: "User Data Convergence (UDC); User Data Repository Access Protocol over the Ud interface; Stage 3".
[27]
TS 22.115: "Service aspects; Charging and billing".
[28]
TS 23.216: "Single Radio Voice Call Continuity (SRVCC); Stage 2".
[29]
TS 23.139: "3GPP-Fixed Broadband Access Interworking".
[30]
Broadband Forum TR-203: "Interworking between Next Generation Fixed and 3GPP Wireless Access" (work in progress).
[31]
Broadband Forum TR-134: "Policy Control Framework " (work in progress).
[32]
TS 25.467: "UTRAN architecture for 3G Home Node B (HNB); Stage 2".
[33]
Broadband Forum TR-291: "Nodal Requirements for Interworking between Next Generation Fixed and 3GPP Wireless Access" (work in progress).
[34a]
Broadband Forum TR-124 issue 2: "Functional Requirements for Broadband Residential Gateway Devices".
[34b]
Broadband Forum TR-124 issue 3: "Functional Requirements for Broadband Residential Gateway Devices".
[35]
Broadband Forum TR-101: "Migration to Ethernet-Based Broadband Aggregation".
[36]
Broadband Forum TR-146: "Internet Protocol (IP) Sessions".
[37]
Broadband Forum TR-300: "Nodal Requirements for Converged Policy Management".
[38]
TS 22.278: "Service requirements for the Evolved Packet System (EPS)".
[39]
TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".
[40]
Broadband Forum TR-092: "Broadband Remote Access Server (BRAS) Requirements Document".
[41]
Broadband Forum TR-134: "Broadband Policy Control Framework (BPCF)".
[42]
TS 23.682: "Architecture enhancements to facilitate communications with packet data networks and applications".
[43]
TS 23.161: "Network-based IP flow mobility and Wireless Local Area Network (WLAN) offload; Stage 2".
[44]
TS 23.303: "Proximity-based services (ProSe); Stage 2".
[45]
TS 26.114: "Multimedia telephony over IP Multimedia Subsystem (IMS); Multimedia telephony; media handling and interaction".
[46]
TS 23.179: "Functional architecture and information flows to support mission-critical communication service; Stage 2".
[47]
RFC 6066:  "Transport Layer Security (TLS) Extensions: Extension Definitions".
[48]
TS 23.285: "Architecture enhancements for V2X services".
[49]
TS 22.011: "Service accessibility".
[50]
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
[51]
TS 22.261: "Service requirements for the 5G system; Stage1".
[52]
TS 23.272: "Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2".
[53]
TS 26.238: "Uplink streaming".
[54]
TR 26.939: "Guidelines on the Framework for Live Uplink Streaming (FLUS)".
[55]
TS 23.221: "3rd Generation Partnership Project; Technical Specification Group Services and Systems Aspects; Architectural Requirements".
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3  Definitions, symbols and abbreviationsp. 17

3.1  Definitionsp. 17

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.
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 TDF or a PCEF enhanced with ADC, 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.
ADC decision:
A decision consists of references to ADC rules, associated enforcement actions (for dynamic ADC rules) and TDF session attributes and is provided by the PCRF to the TDF for application detection and control.
ADC rule:
A set of information enabling the detection of application traffic and associated enforcement actions. ADC rules are directly provisioned into the TDF and referenced by the PCRF.
authorised QoS:
The maximum QoS that is authorised for a service data flow. In case of an aggregation of multiple service data flows within one IP-CAN bearer (e.g. for GPRS a PDP context), the combination of the "Authorised QoS" information of the individual service data flows is the "Authorised QoS" for the IP-CAN bearer. It contains the QoS class identifier and the data rate.
binding:
The association between a service data flow and the IP-CAN bearer (for GPRS the PDP context) 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 and/or offline charging, as appropriate.
charging key:
information used by the online and offline charging system 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 ADC Rule:
an ADC rule, for which the PCRF can provide and modify some parameters via the Sd reference point.
dynamic PCC Rule:
a PCC rule, for which the definition is provided to the PCEF via the Gx reference point.
event report:
a notification, possibly containing additional information, of an event which occurs that corresponds with an event trigger. Also, an event report is a report from the PCRF to the AF concerning transmission resources or requesting additional information.
event trigger:
a rule specifying the event reporting behaviour of a PCEF or BBERF or TDF. Also, it is a trigger for credit management events.
gating control:
The process of blocking or allowing packets, belonging to a service data flow / detected application's traffic, to pass through to the desired endpoint.
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 PCRF and BBERF.
GBR bearer:
An IP-CAN bearer with reserved (guaranteed) bitrate resources.
GPRS IP-CAN:
This IP-CAN incorporates GPRS over GERAN and UTRAN, see TS 23.060.
IP-CAN bearer:
An IP transmission path of defined capacity, delay and bit error rate, etc. See TR 21.905 for the definition of bearer.
IP-CAN session:
The association between a UE and an IP network. The association is identified by one IPv4 and/or an IPv6 prefix together with 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 UE IP addresses/prefix are established and announced to the IP network.
non-GBR bearer:
An IP-CAN bearer with no reserved (guaranteed) bitrate resources.
operator-controlled service:
A service for which complete PCC rule information, including service data flow filter information, is available in the PCRF through configuration and/or dynamic interaction with an AF.
packet flow:
A specific user data flow from and/or to the UE.
Presence Reporting Area:
An area defined within 3GPP Packet Domain for the purposes of reporting of UE presence within that area due to policy control and/or charging reasons. There are two types of Presence Reporting Areas: "UE-dedicated Presence Reporting Areas", and "Core Network pre-configured Presence Reporting Areas". They are further defined in TS 23.401.
PCC decision:
A decision consists of PCC rules and IP-CAN bearer attributes and is provided by the PCRF to the PCEF for policy and charging control and, for PCEF enhanced with ADC, application detection and control.
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, for PCEF enhanced with ADC, for application detection and control.
PCEF enhanced with ADC:
PCEF, enhanced with application detection and control feature.
policy control:
The process whereby the PCRF indicates to the PCEF how to control the IP-CAN bearer. Policy control includes QoS control and/or gating control.
predefined PCC Rule:
a PCC rule that has been provisioned directly into the PCEF by the operator.
policy counter:
A mechanism within the OCS to track spending applicable to a subscriber.
policy counter identifier:
A reference to a policy counter in the OCS 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.
Packet Flow Description (PFD):
A set of information enabling the detection of application traffic provided by a 3rd party service provider. A PFD is further defined in TS 23.682.
QoS class identifier (QCI):
A scalar that is used as a reference to a specific packet forwarding behaviour (e.g. packet loss rate, packet delay budget) to be provided to a SDF. This may be implemented in the access network by the QCI referencing node specific parameters that control packet forwarding treatment (e.g. scheduling weights, admission thresholds, queue management thresholds, link layer protocol configuration, etc.), that have been pre-configured by the operator at a specific node(s) (e.g. eNodeB).
QoS rule:
A set of information enabling the detection of a service data flow and defining its associated QoS parameters.
Monitoring key:
information used by the PCEF, TDF and PCRF 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 APN basis.
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.
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 PCEF 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. 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 (used on Gx and Gxx) within an IP-CAN 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, 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).
session based service:
An end user service requiring application level signalling, which is separated from service rendering.
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.
subscribed guaranteed bandwidth QoS:
The per subscriber, authorized cumulative guaranteed bandwidth QoS which is provided by the SPR/UDR to the PCRF.
subscriber category:
is a means to group the subscribers into different classes, e.g. gold user, the silver user and the bronze user.
(S)Gi-LAN:
The network infrastructure connected to the 3GPP network over the SGi or Gi reference point that provides various IP-based services.
(S)Gi-LAN service function:
A function located in the (S)Gi-LAN that provides value-added IP-based services e.g. NAT, anti-malware, parental control, DDoS protection.
TDF session:
An association between an IP-CAN session and the assigned TDF for the purpose of application detection and control.
uplink bearer binding verification:
The network enforcement of terminal compliance with the negotiated uplink traffic mapping to bearers.
For the purposes of the present document, the following terms and definitions given in TS 23.401 apply:
Narrowband-IoT:
See TS 23.401.
WB-E-UTRAN:
See TS 23.401.
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3.2  Abbreviations |R10|p. 20

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.
ADC
Application Detection and Control
AF
Application Function
AMBR
Aggregated Maximum Bitrate
ARP
Allocation and Retention Priority
ASP
Application Service Provider
BBERF
Bearer Binding and Event Reporting Function
BBF
Bearer Binding Function
BBF AAA
Broadband Forum AAA
BNG
Broadband Network Gateway
BPCF
Broadband Policy Control Function
BRAS
Broadband Remote Access Server
CSG
Closed Subscriber Group
CSG ID
Closed Subscriber Group Identity
DRA
Diameter Routing Agent
E-UTRAN
Evolved Universal Terrestrial Radio Access Network
H-PCEF
A PCEF in the HPLMN
H-PCRF
A PCRF in the HPLMN
HRPD
High Rate Packet Data
HSGW
HRPD Serving Gateway
IP-CAN
IP Connectivity Access Network
MPS
Multimedia Priority Service
NB-IoT
Narrowband IoT
NBIFOM
Network-based IP flow mobility
NSWO
Non-Seamless WLAN Offload
OAM
Operation Administration and Maintenance
OFCS
Offline Charging System
OCS
Online Charging System
PCC
Policy and Charging Control
PCEF
Policy and Charging Enforcement Function
PCRF
Policy and Charging Rules Function
PFDF
Packet Flow Description Function
PRA
Presence Reporting Area
QCI
QoS Class Identifier
RAN
Radio Access Network
RCAF
RAN Congestion Awareness Function
RLOS
Restricted Local Operator Services
RUCI
RAN User Plane Congestion Information
RG
Residential Gateway
SCEF
Service Capability Exposure Function
vSRVCC
video Single Radio Voice Call Continuity
SPR
Subscription Profile Repository
TDF
Traffic Detection Function
TSSF
Traffic Steering Support Function
UDC
User Data Convergence
UDR
User Data Repository
V-PCEF
A PCEF in the VPLMN
V-PCRF
A PCRF in the VPLMN
WB-E-UTRAN
Wide Band E-UTRAN
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