现场设备是智能交通系统（ITS）的关键组件。现场设备包括交通信号、信息标志、气象站、交通传感器、用于连接ITS（C-ITS）环境的路边设备等。 现场设备通常需要与其他外部实体（经理）交换信息。现场设备可能非常复杂，因此需要对许多数据概念进行标准化以进行交换。因此，ISO20684系列分为几个单独的部分。 本文档指定了用于发出SNMP集请求以响应触发器触发的用户需求、要求和设计元素。这允许管理员配置现场设备，以实现对现场条件的简单响应。 注释1IETF RFC 2981和本文档中定义的事件MIB的某些部分有相似之处。 注释2ISO 20684-1提供了有关ISO如何20684系列涉及整个ITS架构。

Field devices are a key component in intelligent transport systems (ITS). Field devices include traffic signals, message signs, weather stations, traffic sensors, roadside equipment for connected ITS (C-ITS) environments, etc. Field devices often need to exchange information with other external entities (managers). Field devices can be quite complex, necessitating the standardization of many data concepts for exchange. As such, the ISO？20684 series is divided several individual parts. This document specifies the user needs, requirements and design elements that are used to issue an SNMP set-request in response to a trigger firing. This allows a manager to configure the field device to implement simple responses to conditions in the field. NOTE 1？There are similarities between certain portions of the Event MIB defined in IETF RFC 2981 and this document. NOTE 2？ISO 20684-1 provides additional details about how the ISO？20684 series relates to the overall ITS architecture.