3 Definitions, symbols and abbreviations

22.1863GPPRelease 17Service requirements for enhanced V2X scenariosTS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

End-to-end latency: Time it takes to transfer a given piece of information from a source to a destination, measured at the application level, from the moment it is transmitted by the source to the moment it is received at the destination.

Reliability (%): The success probability of transmitting X bytes within a certain delay, which is the time it takes to deliver a small data packet from the radio protocol layer 2/3 SDU ingress point to the radio protocol layer 2/3 SDU egress point of the radio interface.

Road Side Unit: A stationary infrastructure entity supporting V2X applications that can exchange messages with other entities supporting V2X applications.

NOTE: RSU is a term frequently used in existing ITS specifications, and the reason for introducing the term in the 3GPP specifications is to make the documents easier to read for the ITS industry. RSU is a logical entity that supports V2X application logic using the functionality provided by either a 3GPP network or an UE (referred to as UE-type RSU).

For the purposes of the present document, the following terms and definitions given in ISO TS 17419 [5] apply:

ITS Application Identifier: globally unique, registered number identifying an ITS application object

For the purposes of the present document, the following term and definition given in IEEE Std 1609.0 [6] apply:

Provider Service Identifier: An identifier of an application-service provided by a higher layer entity.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

ITS Intelligent Transport Systems

ITS-AID ITS Application Identifier

LoA Level of Automation

PSID Provider Service Identifier

RSU Road Side Unit