334 ◾ Mobile Ad Hoc Networks: Current Status and Future Trends
Besides, beacon messages might be used by other applications (e.g., routing protocols). Note that
messages mentioned above are complementary to each other. While alarm messages may be able to
inform the driver in time about already happened events in order to prevent more incidents, bea-
con messages can prevent many incidents before they take place. Moreover, since alarm messages
announce events, they are more critical and should be disseminated with a higher priority.
13.3.2 Comfort Applications
In comfort applications, the goal is to improve passenger comfort and traffic efficiency. Examples
for this category are traffic-information system, route optimization (navigation), electronic ...