ISO 20684-1:2021 高度道路交通システム—ロードサイドモジュールSNMPデータインターフェイス—パート1：概要 | ページ 6

3.1

agent

entity (3.2) that can respond to get and set requests

3.2

entity

device or “thing” that becomes part of an intelligent transport system

3.3

event

information captured when a trigger (3.13) fires (3.6) within an agent (3.1)

Note 1 to entry: Events are often transmitted in notifications or stored in logs.

3.4

exception

condition that creates an event (3.3) that a user can want to store in a log (3.7) or transmit in a notification (3.9)

3.5

field device

fixed or portable roadside module that includes an agent (3.1)

3.6

fire

to start a process when a trigger (3.13) value transitions from false to true

3.7

log

registry of events (3.3) within an agent (3.1) that can be retrieved by a manager (3.8)

3.8

manager

entity (3.2) that can generate get and set requests and/or can receive report, trap, and/or other inform messages

[SOURCE: ISO 15784-2:2015, 4.9 — modified.]

3.9

notification

listing of one or more events (3.3) that the agent (3.1) can send to one or more managers (3.8)

3.10

response time

time from the receipt of the last byte of a Confirmed Class pduType to the start of the transmission of the first byte of the response message (when access is allowed by lower layers)

3.11

target

entity (3.1) to which the field device (3.5) can need to send requests or notifications

Note 1 to entry: Field devices often need to send notifications to managers when triggers fire.

Note 2 to entry: Field devices can be configured to request data from other field devices to use in their expression or trigger logic.

Note 3 to entry: Field devices can be configured to control other field devices in response to a trigger firing.

3.12

trap

notification (3.9) sent from an SNMP agent (3.1) to a SNMP manager (3.8) without an immediately preceding request from the manager or any expectation of an acknowledgement

3.13

trigger

condition that evaluates to a Boolean value