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Content for  TS 24.386  Word version:  16.2.0

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1  ScopeWord‑p. 6

The present document specifies the protocols:
  • for V2X authorization between the UE and the V2X control function (over the V3 interface);
  • for V2X communication among the UEs (over the LTE-PC5 interface, and over the NR-PC5 interface as described in TS 24.587 and TS 38.331); and
  • for V2X communication between the UE and the V2X application server (over the LTE-Uu interface).
The present document defines the associated procedures for V2X authorization and V2X communication.
The present document also defines the message format, message contents, error handling and system parameters applied by the protocols for V2X.
The present document is applicable to:
  • the UE;
  • the V2X control function; and
  • the V2X application server.
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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, 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 23.285: "Architecture enhancements for V2X services".
[3]
TS 24.385: "V2X services Management Object (MO)".
[4]
TS 24.334: "Proximity-services (ProSe) User Equipment (UE) to Proximity-services (ProSe) Function Protocol aspects; Stage 3".
[5]
IEEE 1609.3 2016: "IEEE Standard for Wireless Access in Vehicular Environments (WAVE) -- Networking Services".
[6]
ISO 29281-1 2013: "Intelligent transport systems -- Communication access for land mobiles (CALM) -- Non-IP networking -- Part 1: Fast networking & transport layer protocol (FNTP)".
[7]  Void.
[8]
TS 36.323: "Packet Data Convergence Protocol (PDCP) specification".
[9]
TS 23.122: "Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode".
[10]
TS 36.304: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode".
[11]
TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3".
[12]
TS 24.008: "Mobile Radio Interface Layer 3 specification; Core Network Protocols; Stage 3".
[13]
RFC 1035:  "DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION".
[14]
TS 23.003: "Numbering, addressing and identification".
[15]
TS 29.468: "Group Communication System Enablers for LTE (GCSE_LTE); MB2 Reference Point; Stage 3".
[16]
RFC 4566:  "SDP: Session Description Protocol".
[17]
RFC 2234:  "Augmented BNF for Syntax Specification: ABNF".
[18]
RFC 768:  "User Datagram Protocol".
[19]  Void.
[20]
TS 33.185: "Security aspect for LTE support of V2X services".
[21]
TS 33.401: "3GPP System Architecture Evolution: Security Architecture".
[22]
TS 36.331: "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification".
[23]
ETSI EN 302 636-3 v1.2.1: "Intelligent Transport Systems (ITS); Vehicular Communications; GeoNetworking; Part 3: Network Architecture".
[24]
CCSA YD/T 3707-2020: "Technical requirements of network layer of LTE-based vehicular communication".
[25]
TS 38.331: "NR; Radio Resource Control (RRC) protocol specification".
[26]
TS 23.287: "Architecture enhancements for 5G System (5GS) to support; Vehicle-to-Everything (V2X) services".
[27]
TS 24.587: "Vehicle-to-Everything (V2X) services in 5G System (5GS); Stage 3".
[28]
TS 24.587: "Vehicle-to-Everything (V2X) services in 5G System (5GS); Protocol aspects; Stage 3".
[29]
RFC 793:  "Transmission Control Protocol".
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3  Definitions and abbreviationsWord‑p. 8

3.1  Definitions

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.
Not served by E-UTRAN for V2X communication:
the UE is either:
  • outside of E-UTRAN coverage;
  • within E-UTRAN coverage but not camped on any cell;
  • within E-UTRAN coverage but camped on a non-E-UTRAN cell;
  • camped on an E-UTRAN cell not indicating that V2X communication over PC5 is supported by the network; or
  • camped on an E-UTRAN cell indicating that V2X communication over PC5 is supported by the network and providing carrier frequencies and/or radio resources for V2X communication over PC5 which do not belong to the provisioned carrier frequency that the UE intends to use.
V2X service identifier:
an identifier of a V2X service, e.g. PSID, ITS-AID, or AID of the V2X application.
For the purposes of the present document, the following terms and definitions given in TS 23.285 apply:
Application Identifier (AID)
Intelligent Transport Systems (ITS)
ITS Application Identifier (ITS-AID)
ProSe Per-Packet Reliability (PPPR)
Provider Service Identifier (PSID)
V2X service
For the purposes of the present document, the following terms and definitions given in TS 23.003 apply:
TMGI
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3.2  Abbreviations

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.
PDB
Packet Delay Budget
PPPP
ProSe Per-Packet Priority
SAI
Service Area Identifier
SDP
Session Description Protocol
UDP
User datagram protocol
V2X
Vehicle-to-Everything

4  General

4.1  Overview

The present specification specifies means for transport of V2X messages. V2X messages are generated and consumed by upper layers of the UE and the V2X application server. V2X messages can contain IP data or non-IP data.
The V2X messages can be transported using:
  • V2X communication over PC5; and
  • V2X communication over LTE-Uu.
V2X communication over PC5 enables transfer of V2X messages among UEs. For V2X messages containing IP data, only IPv6 is used. IPv4 is not supported in this release of the specifications.
V2X communication over LTE-Uu enables transfer of V2X messages between a UE and a V2X application server. V2X messages are carried over LTE-Uu in payload of a UDP/IP packet or via a TCP connection. A UE using V2X communication over LTE-Uu:
  • can use unicast transport (in uplink, downlink or both of them);
  • can use MBMS transport (in downlink only);
  • can use transport for uplink which is the same or different to the transport for downlink; and
  • can use also MBMS transport for downlink without using any transport for uplink.
The communication security over the V3 interface and LTE-Uu interface is specified in TS 33.185. The communication security and privacy over the PC5 interface is specified in TS 33.185.
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