Time stamp generation without GNSS signal

The invention relates to a method for generating a time stamp in a vehicle (4) which participates in a vehicle Ad-hoc network, said method associating, by giving out the time stamp, an event (16), which is transmitted in a message (28), with a clock time (32). Said clock time is generated by updating a global time base (38) that can be derived from a global satellite navigation signal (20) called GNSS signal (20). The method according to the invention comprises the following steps: checking whether a GNSS signal (12) can be received, and generating the clock time (32) based on a local time base (50) if an insufficient number of global satellite navigation signals (12) for deriving the global time base (38) is available. 本发明涉及种用于在参与车辆Ad-hoc网络的车辆（4）中产生时间戳的方法，其利用所述时间戳向在消息（28）中发送的事件（16）分配时钟时间（32），所述时钟时间通过能够从被称为GNSS信号（20）的全球卫星导航信号（20）中推导出来的全球时基（38）的更新来产生，所述方法包括：-检查能否接收到GNSS信号（12）；并且-在没有足够数目的全球卫星导航信号（12）可用于推导出所述全球时基（38）时，在当地时基（50）的基础上产生所述时钟时间（32）。