rid

routine identifier

SatNav

satellite navigation

2G

second-generation cellular phone technology e.g. GSM

SDEE

secure data exchange entity

secure data interface (SDI)

gateway providing bidirectional means for security and access control

gateway providing bidirectional means for security and access control

SNI

secure network interface

SPAKE2

secure password authenticated key exchange 2

secure session

functional entity providing confidentiality, integrity, authentication, guaranteed in-order delivery, and replay protection on the datagrams that are passed over it

functional entity providing confidentiality, integrity, authentication, guaranteed in-order delivery, and replay protection on the datagrams that are passed over it

SSTD

secure session between trusted devices

secure session service

functional entity responsible for establishing secure communications sessions with its peer instances

functional entity responsible for establishing secure communications sessions with its peer instances

SPDU

secured protocol data unit

security adaptor layer

functional entity providing multiplexing and demultiplexing functionality for data and session control commands

functional entity providing multiplexing and demultiplexing functionality for data and session control commands

SCMS

security credentials management system

SFR

security functional requirements

security subsystem

functional entity providing security functionality for use by an ITS-S application process

functional entity providing security functionality for use by an ITS-S application process

SPII

sensitive or personally identifiable information

sensor and control network; sensor control network (SCN)

communication bus with measured inputs and controlled outputs

communication bus with measured inputs and controlled outputs

SRM

service response message

SSP

service specific permission

signal control zone

geo-physical area of an intersection used for an approaching vehicle to request a pre-empt or priority request of a traffic signal

geo-physical area of an intersection used for an approaching vehicle to request a pre-empt or priority request of a traffic signal

signal group

set of traffic signals providing a signal indication that governs the vehicle/pedestrian/bicycle manoeuvres possible for a set of one or more lanes

set of traffic signals providing a signal indication that governs the vehicle/pedestrian/bicycle manoeuvres possible for a set of one or more lanes

signal indication

illumination of a signal lens or equivalent device

illumination of a signal lens or equivalent device

SREM

signal request extended message

SSEM

signal request status extended message

signal status message (SSM)

SAE J2735™ message from the infrastructure to the C-ITS device that contains the infrastructure’s response details to a signal request message (SRM) for requesting priority from an intersection’s traffic signal controller

SAE J2735™ message from the infrastructure to the C-ITS device that contains the infrastructure’s response details to a signal request message (SRM) for requesting priority from an intersection’s traffic signal controller

SAO

Signed Acceptance of Obligations

SPaTEM

SPaT extended message

states

distinct system setting in which the same user input will produce different results than it would in other settings
NOTE 1 to entry: The ‘Core System’ as a whole is always in one state [a state is typically commanded or placed in that state by an operator; states are installation, operational, maintenance, training, and standby].

distinct system setting in which the same user input will produce different results than it would in other settings
NOTE 1 to entry: The ‘Core System’ as a whole is always in one state [a state is typically commanded or placed in that state by an operator; states are installation, operational, maintenance, training, and standby].

SME

station management entity

support system

facilities that assist in C-ITS service provision, including security credentials certificate and registration authorities, that allow devices and systems to establish trust relationships

facilities that assist in C-ITS service provision, including security credentials certificate and registration authorities, that allow devices and systems to establish trust relationships