ISO/TR 17384:2008描述了交互式CDRG系统中基础设施和车载设备之间的空中接口的信息内容和格式。 本技术报告中用于交互式CDRG系统中路线指引信息的空中接口信息集适用于配备车载地图数据库的车辆和未配备的车辆（即配备简化图形输出和/或文本信息显示功能的车辆）。 ISO/TR 17384:2008涵盖了媒体独立系统。在本技术报告中，基于手机的CDRG和基于信标的CDRG都需要考虑信息。

ISO/TR 17384:2008 describes the message contents and format of the air interface between the infrastructure and the in-vehicle unit in the Interactive CDRG system. The air interface message set for route guidance information in the interactive CDRG system in this Technical Report is applicable to both vehicles equipped with an onboard map database and those which are not equipped (i.e., those equipped with simplified graphic output and/or text message display functions). ISO/TR 17384:2008 covers media independent systems. In this Technical Report, messages required for both cellular phone-based CDRG and beacon-based CDRG are taken into account.