Content for TS 29.217 Word version: 18.0.0

1 Scope p. 6

The present document provides the stage 3 specification of the Np reference point. The functional requirements and the stage 2 specifications of the Np reference point are contained in TS 23.203. The Np reference point lies between the RAN Congestion Awareness Function (RCAF) and the Policy and Charging Rules Function (PCRF) for the non-roaming case, between the RCAF and the H-PCRF for the home-routed scenario and between the RCAF and the V-PCRF for the visited access scenario.

2 References p. 6

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]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TS 23.203: "Policy and charging control architecture".

[3]

TS 29.213: "Policy and Charging Control signalling flows and QoS parameter mapping".

[4]

RFC 4005: "Diameter Network Access Server Application".

[5]

RFC 4006: "Diameter Credit Control Application".

[6]

TS 29.229: "Cx and Dx interfaces based on Diameter protocol; Protocol details".

[7]

RFC 3588: "Diameter Base Protocol".

[8]

TS 23.401: "GPRS enhancements for E-UTRAN access".

[9]

TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".

[10]

TS 29.215: "Policy and Charging Control (PCC) over S9 reference point; Stage 3".

[11]

TS 29.061: "Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN)".

[12]

TS 29.274: "3GPP Evolved Packet System. Evolved GPRS Tunnelling Protocol for EPS (GTPv2)".

[13]

ITU-T Recommendation E.212: "The international identification plan for mobile terminals and mobile users".

[14]

TS 29.212: "Policy and Charging Control (PCC); Reference points".

[15]

RFC 7683: "Diameter Overload Indication Conveyance".

[16]

RFC 7944: "Diameter Routing Message Priority".

[17]

RFC 8583: "Diameter Load Information Conveyance".

[18]

RFC 6733: "Diameter Base Protocol".

[19]

RFC 5719: "Updated IANA Considerations for Diameter Command Code Allocations".

[20]

RFC 2234: "Augmented BNF for syntax specifications".

3 Definitions and abbreviations p. 7

3.1 Definitions p. 7

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.

Home Routed Access:

Roaming scenario where the PCEF is located in the HPLMN. In a Home Routed roaming scenario, the UE obtains access to the packet data network from the HPLMN.

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.

Visited Access (also known as local breakout):

Roaming scenario where the PCEF is located in the VPLMN. In a Visited Access Roaming scenario, the UE obtains access to the packet data network from the VPLMN.

3.2 Abbreviations p. 7

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.

Application Function

ARR

Aggregated RUCI Report Request

ARA

Aggregated RUCI Report Answer

DRMP

Diameter Routing Message Priority

H-PCRF

Home PCRF

MUR

Modify Uecontext Request

MUA

Modify Uecontext Answer

NRR

Non-Aggregated RUCI Report Request

NRA

Non-Aggregated RUCI Report Answer

PCC

Policy and Charging Control

PCRF

Policy and Charging Rule Function

RCAF

RAN Congestion Awareness Function

RUCI

RAN User Plane Congestion Information

V-PCRF

Visited PCRF