The present document studies on charging aspects of Proximity-based Services in 5GS based on TS 23.304
The charging aspects related to the Proximity-based Services in 5GS are covered within the scope:
Charging architecture, for supporting charging of ProSe Direct Discovery and Direct Communication related to Public Safety and commercial proximity service.
Charging principles, scenarios and potential requirements related to the ProSe service in 5GS.
Potential charging solutions for the Proximity-based Services in 5GS.
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.
: "Vocabulary for 3GPP Specifications".
: "Architecture enhancements for 5G System (5GS) to support Vehicle-to-Everything (V2X) services".
: "Study on system enhancement for Proximity based Services (ProSe) in the 5G System (5GS)".
: "Proximity-based Services (ProSe) charging".
: "Telecommunication management; Charging management; Charging architecture and principles".
: "Telecommunication management; Charging management; 5G system; Services, operations and procedures of charging using Service Based Interface (SBI)"
: "System Architecture for the 5G System; Stage 2".
: "Proximity-based services (ProSe); Stage 2".
: "Service aspects; Charging and billing".
: "Charging management; Network slice performance and analytics charging in the 5G System (5GS); Stage 2".
: "Proximity based Services (ProSe) in the 5G System (5GS)".
For the purposes of the present document, the terms 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
5G ProSe Direct Discovery:
5G ProSe Direct Communication:
A procedure employed by a ProSe-enabled UE to discover other ProSe-enabled UEs in its vicinity by using only the capabilities of the two UEs with NR technology. See TS 23.304
5G ProSe UE-to-Network Relay:
A communication between two or more UEs in proximity that are ProSe-enabled, by means of user plane transmission using NR technology via a path not traversing any network node. See 3GPP TR TS 23.304
A UE that provides functionality to support connectivity to the network for Remote UE(s). See TS 23.304
A 5G ProSe-enabled UE that communicates with a DN via a 5G ProSe UE-to-Network Relay. See TS 23.304
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
Charging Data Record
Charging Trigger Function (Accounting Metrics Collection)
Charging Trigger Function (Accounting Data Forwarding)
Direct Discovery Name Management Function
PC5 QoS Flow Identifier
Proximity-based Services (ProSe) are services that can be provided by the 3GPP system based on UEs being in proximity to each other. Proximity-based Services has been developed in EPS to support both commercial and public safety services. Proximity Services (specifically the direct communication) has been enhanced to support V2X services over LTE.
In 5GS, the 3GPP system enablers for ProSe include the following functions:
The present document aims to describe the converged charging for the Proximity-based Services (ProSe) in 5GS, based on the stage 2 description of ProSe in TS 23.303
As indicated in TS 32.277
, the offline and online charging description for the Proximity-based Services was specified based on EPS system, including the support of charging support of ProSe Direct Discovery, one-to-many Direct Communication, and one-to-one Direct Communication including UE-to-Network Relay (for public safety use), and EPC based discovery.
When mapped to 5GS, the study will focus on how to accommodate charging ProSe Direct Discovery and Direct Communication over NR based PC5 for commercial services and public safety based on the 5G service-based architecture.