Content for  TS 29.214  Word version:  16.4.0

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1  ScopeWord‑p. 8
The present document provides the stage 3 specification of the Rx reference point for the present release. The functional requirements and the stage 2 specifications of the Rx reference point are contained in TS 23.203.
The Rx reference point lies between the Application Function (AF) and the Policy and Charging Rule Function (PCRF). In the 5GS the Rx reference point resides between the AF and the Policy Control Function (PCF) as specified in TS 23.501 and TS 23.503.
The Rx interface which is based on RESTful HTTP and XML is specified in TS 29.201.
Whenever it is possible the present document specifies the requirements for the protocol by reference to specifications produced by the IETF within the scope of Diameter. Where this is not possible, extensions to Diameter are defined within the present document.

2  References

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 and/or edition number or version number) 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.
TR 21.905: "Vocabulary for 3GPP Specifications".
TS 23.203: "Policy and Charging Control architecture".
[3]  Void.
[4]  Void.
TS 29.209: "Policy control over Gq interface", latest Rel-6 version.
[6]  Void.
TS 29.211: "Rx Interface and Rx/Gx signalling flows", latest Rel-6 version.
TS 29.212: "Policy and Charging Control (PCC); Reference points".
TS 29.213: "Policy and Charging Control signalling flows and Quality of Service (QoS) parameter mapping".
[10]  Void.
RFC 3556:  "Session Description Protocol (SDP) Bandwidth Modifiers for RTP Control Protocol (RTCP) Bandwidth".
RFC 4005:  "Diameter Network Access Server Application".
RFC 4566:  "SDP: Session Description Protocol".
RFC 4006:  "Diameter Credit Control Application".
ETSI TS 183 017 v3.2.1: "Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN); Resource and Admission Control: DIAMETER protocol for session based policy set-up information exchange between the Application Function (AF) and the Service Policy Decision Function (SPDF); Protocol specification".
TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".
TS 24.229: "IP Multimedia Call Control Protocol based on SIP and SDP; Stage 3".
RFC 3264:  "An Offer/Answer Model with the Session Description Protocol (SDP)".
[19]  Void.
RFC 3162:  "Radius and IPv6".
RFC 5031:  "A Uniform Resource Name (URN) for Emergency and Other Well-Known Services".
[22]  Void.
TS 32.240: "Telecommunication management; Charging management; Charging architecture and principles".
TS 32.299: "Telecommunication management; Charging management; Diameter charging applications".
TS 29.229: "Cx and Dx interfaces based on the Diameter protocol; Protocol details"
TS 24.292: "IP Multimedia (IM) Core Network (CN) subsystem Centralized Services (ICS); Stage 3".
RFC 3959  (December 2004): "The Early Session Disposition Type for the Session Initiation Protocol (SIP)".
TS 23.380: "IMS Restoration Procedures".
[29]  Void.
[30]  Void.
TS 22.153: "Multimedia Priority Service".
[32]  Void.
TS 29.274: "3GPP Evolved Packet System. Evolved GPRS Tunnelling Protocol for EPS (GTPv2)".
TS 29.061: "Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)".
RFC 7683:  "Diameter Overload Indication Conveyance".
TS 23.468: "Group Services and System Aspects; Group Communication System Enablers for LTE (GCSE LTE)".
TS 29.201: "Representational State Transfer (REST) reference point between Application Function (AF) and Protocol Converter (PC)".
TS 23.003: "Numbering, addressing and identification".
TS 29.273: "3GPP EPS AAA interfaces".
TS 23.682: "Architecture enhancements to facilitate communications with packet data networks and applications".
TS 26.114: "IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction".
RFC 5761:  "Multiplexing RTP Data and Control Packets on a Single Port".
RFC 7944:  "Diameter Routing Message Priority".
[44]  Void.
RFC 8101:  "IANA Registration of New Session Initiation Protocol (SIP) Resource-Priority Namespace for Mission Critical Push To Talk service".
TS 23.303: "Proximity-based services (ProSe); Stage 2".
TS 29.154: "Service capability exposure functionality over Nt reference point".
RFC 5009:  "Private Header (P-Header) Extension to the Session Initiation Protocol (SIP) for Authorization of Early Media".
RFC 3948:  "UDP Encapsulation of IPsec ESP Packets".
TS 24.302: "Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; stage 3".
RFC 8583:  "Diameter Load Information Conveyance".
RFC 6733:  "Diameter Base Protocol".
TS 23.167: "IP Multimedia Subsystem (IMS) emergency sessions".
TS 23.379: "Functional architecture and information flows to support Mission Critical Push To Talk (MCPTT); Stage 2".
TS 23.501: "System Architecture for the 5G System; Stage 2".
TS 23.503: "Policy and Charging Control Framework for the 5G System; Stage 2".
TS 29.514: "5G System; Policy Authorization Service; Stage 3".
TS 29.512: "5G System; Session Management Policy Control Service; Stage 3".
TS 29.513: "5G System; Policy and Charging Control signalling flows and QoS parameter mapping; Stage 3".
TS 23.280: "Common functional architecture to support mission critical services; Stage 2".
TS 23.281: "Functional architecture and information flows to support Mission Critical Video (MCVideo); Stage 2".
TS 24.182: "IP Multimedia Subsystem (IMS) Customized Alerting Tones (CAT); Protocol specification".
TS 24.147: "Conferencing using the IP Multimedia (IM) Core Network (CN) subsystem; Stage 3".
TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".
TS 22.101: "Service aspects; Service principles".
TS 23.221: "Architectural requirements".
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
RFC 4574:  "The Session Description Protocol (SDP) Label Attribute".
TS 26.238: "Uplink Streaming".
TS 24.501: "Non-Access-Stratum (NAS) Protocol for 5G System (5GS); Stage 3".
TS 38.413: "NG-RAN; NG Application Protocol (NGAP)".
TS 23.316: "Wireless and wireline convergence access support for the 5G System (5GS)".
CableLabs WR-TR-5WWC-ARCH: "5G Wireless Wireline Converged Core Architecture".
BBF WT-470: "5G FMC Architecture".

3  Definitions and abbreviationsWord‑p. 11

3.1  Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply:
Application Function (AF):
element offering application(s) that use IP bearer resources
AF Session:
application level session established by an application level signalling protocol offered by the AF that requires a session set-up with explicit session description before the use of the service.
Attribute-Value Pair (AVP):
See RFC 6733, corresponds to an Information Element in a Diameter message.
PCRF process of associating IP flows described in AF Service Information with IP-CAN bearers.
Bit rate:
The number of bits (denoted in units of bits, kbits, etc.) that are conveyed or processed per unit of time. The bit rate in bit/s can be abbreviated with bps. This specification uses SI (International System of Units) prefixes as unit prefixes, which strictly refer to the power of 10, and shall not be used for the power of 2. For example, 1 kbit/s represents 1000 bit/s or 1 Mbit/s represents 1000 kbit/s and so on.
IP-CAN bearer:
IP transmission path of defined capacity, delay and bit error rate, etc. See TR 21.905 for the definition of bearer.
IP-CAN session:
association between a UE and an IP network (for GPRS, APN). The association is identified by one UE Ipv4 address and/or one 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.
IP flow:
unidirectional flow of IP packets with the same source IP address and port number and the same destination IP address and port number and the same transport protocol. Port numbers are only applicable if used by the transport protocol.
MPS session:
A session for which priority treatment is applied for allocating and maintaining radio and network resources to support the Multimedia Priority Service (MPS). MPS is defined in TS 22.153.
Packet flow:
A specific user data flow carried through the PCEF. A packet flow can be an IP flow.
PCC rule:
set of information enabling the detection of a service data flow and providing parameters for policy control and/or charging control.
is an architectural style consisting of a coordinated set of architectural constraints applied to components, connectors, and data elements, within a distributed hypermedia system applied to the development of web services.
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.
service information:
set of information conveyed from the AF to the PCRF over the Rx interface to be used as a basis for PCC decisions at the PCRF, including information about the AF session (e.g. application identifier, type of media, bandwidth, IP address and port number).
service data flow:
An aggregate set of packet flows.

3.2  AbbreviationsWord‑p. 12
For the purpose of the present document, the abbreviations given in TR 21.905 and the following apply:
5G Mobility Management protocol
5G System
5G Session Management protocol
Application Detection and Control
Application Function
Application Server
Application Service Provider
Access Traffic Steering, Switching and Splitting
Attribute Value Pair
Broadband Forum
Coverage and Handoff Enhancements using Multimedia error robustness feature
Charging Rules Function
Diameter Routing Message Priority
Differentiated Services Code Point
Digital Subscriber Line
Framework for Live Uplink Streaming
Group Communication Service
Group Communication Service Application Server
Hybrid Fiber Coax
IP Connectivity Access Network
Multimedia Priority Service
Non-3GPP Interworking Function
Non-5G-Capable over WLAN
NG Application Protocol
Network Identifier
Policy and Charging Control
Policy and Charging Enforcement Function
Policy Control Function
Policy and Charging Rule Function
Policy Decision Function
Proxy-Call Session Control Function
Passive Optical Network
Public Safety Answering Point
Quality of Service
RAN Congestion Awareness Function
Restricted Local Operator Services
Service Capability Exposure Function
Service Capability Server
Service Data Flow
Session Management Function
Stand-alone Non-Public Network
Subscriber Profile Repository
Traffic Detection Function
Trusted Non-3GPP Access Point
Trusted Non-3GPP Gateway Function
Trusted WLAN Access Point
Trusted WLAN Interworking Function
User Data Convergence
User Equipment
User Data Repository
Extensible Markup Language

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