ISO/TS 21176:2020 協調型高度道路交通システム（C-ITS）  —  ITSステーションの位置、速度、時間機能 | ページ 6

3.1

acceleration

rate of change of velocity (3.19) of an object with respect to time

Note 1 to entry: Acceleration is a physical vector quantity; both magnitude and direction are needed to define it. The unit of the scalar absolute value (magnitude) of acceleration is measured in the international system of units as metres per second squared (m/s²).

3.2

confidence level

probability that the actual PVT information (3.15) is within the error bounds of the estimated PVT information

Note 1 to entry: Confidence level represents the confidence that the estimated position does not exceed the error bounds, referred to as protection level (3.13) in EN 16803-1.

Note 2 to entry: Confidence level, the term used in ETSI TS 102 894-2 V1.3.1 (2018-08), is the complementary probability of the integrity risk (3.3) (i.e. confidence level = 1 – integrity risk).

3.3

integrity risk

probability that, for positioning terminals providing a protection level (3.13) as integrity-related quantity, the actual error on a given output component exceeds its associated protection level

Note 1 to entry:Integrity risk is the complementary probability of the confidence level (3.2) (i.e. integrity risk = 1 – confidence level).

[SOURCE:EN 16803-1:2020, 3.2.8]

3.4

ITS-S application

ITS-S application process (3.5) residing in the ITS-S application entity

[SOURCE:ISO 21217:2014, 3.18]

3.5

ITS-S application process

ITS-S-AP

element in an ITS station that performs information processing for a particular application and uses ITS-S services to transmit and receive information

[SOURCE:ISO 21217:2014, 3.19]

3.6

ITS-S capability

uniquely addressable protocol or functionality that is part of an ITS-S managed service entity (3.8)

Note 1 to entry: Examples of ITS-S capabilities in the ITS station facilities layer are generic ITS-S facilities layer services specified in ISO/TS 17429 (Communication Profile Handler, Facilities Services Handler, Content Subscription Handler), the position and time service defined in ISO/TS 21176, the security service defined in ISO/TS 21177; examples of ITS-S capabilities in the ITS-S networking and transport layer are IPv6 functionalities defined in ISO 21210 (IPv6 neighbour discovery, IPv6 forwarding, IPv6 mobility support, ...), the fast service announcement protocol defined in ISO 22418, etc.

[SOURCE:ISO 24102-6:2018, 3.6]

3.7

ITS-S facilities layer protocol data unit

ITS-FPDU

protocol data unit exchanged between peer ITS-S facility layers

[SOURCE:ISO 21217:2014, 3.23]

3.8

ITS-S managed service entity

ITS-S MSE

uniquely addressable entity in an ITS-S layer comprised of a set of related ITS-S capabilities

Note 1 to entry: Examples of ITS-S managed service entities are: a communication module in the ITS-S access technologies layer (M5, cellular, etc.), a protocol suite in the ITS-S networking and transport layer (IPv6, FNTP, GeoNetworking, 6LoWPAN, etc.), the generic facilities MSE at the ITS-S facilities layer.

[SOURCE:ISO 24102-6:2018, 3.14]

3.9

ITS-S facilities header

header used to form an “ITS-S facilities layer protocol data unit”

[SOURCE:ISO/TS 17429:2017, 3.13]

3.10

ITS-S facilities service

ITS-S capability of the ITS-S facilities layer providing a service that may be applied to ADUs at the request of the source ITS-S-AP

Note 1 to entry: Examples of ITS-S facilities services are “time stamping”, “geo-stamping”.

[SOURCE:ISO/TS 17429:2017, 3.14]

3.11

kinematics

motion of an object

Note 1 to entry: Kinematics does not consider the forces that cause an object to move.

3.11.1

kinematics state vector

set of parameters describing the kinematics (3.11) of an object, including its position

3.12

position

terrestrial absolute geographical location

Note 1 to entry: The absolute geographical location is defined according to a global coordinate reference system, such as the World Geodetic System 84 (WGS84)^[25] or the International Terrestrial Reference System (ITRS)^[26].

Note 2 to entry: The CEN/TR 17297 series presents a tutorial on location referencing methods, applicable location systems and translation methods between different system^[12].

3.13

protection level

estimation of an upper bound for the error made on a position (3.12) or velocity (3.19) component (e.g. the plane position) associated with a given probability called i ntegrity risk (3.3)

[SOURCE:EN 16803-1:2020, 3.2.18]

3.14

PVT capability

ITS-S capability of the ITS-S facilities layer providing the PVT service

3.15

PVT information

information related to kinematics (3.11) of an ITS-SU

Note 1 to entry: Examples of such information are position, velocity, speed or acceleration as a function of time.

3.16

PVT service

station-internal service providing PVT information (3.15)

3.17

PVT stamp

addendum of PVT information (3.15) to the ADUs, by the ITS-S facilities layer, for each FPDU of a specific ITS-S flow

Note 1 to entry: This feature by which the ITS-S facilities layer augments ADUs by adding data to FPDUs is defined in ISO 24102-6.

3.18

speed

rate of change of an object's position with respect to a frame of reference

Note 1 to entry: Speed is a function of time.

3.19

velocity

an object's speed (3.18) and direction of motion

Note 1 to entry: Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed (3.18) , a unit whose quantity is measured in the international system of units as metres per second (m/s).