Abstract
Multihop wireless networks are mobile communication systems that do not require infrastructure, unlike cellular systems. In the multihop wireless networks, information is sent to a destination node via a connected multihop wireless path between the source and destination nodes. Epidemic communication and information floating are more flexible networking technologies than multihop wireless networks. Epidemic communication delivers information by spatially spreading information through direct wireless communication and the movement of mobile nodes having information. Information floating delivers information to unspecified nodes in a specific area, without the disordered spread of information, by permitting direct wireless communication only in a designated area. These methods of information delivery utilizing direct information exchange between mobile nodes and the movement of mobile nodes carrying information have gathered attention. In this paper, we explain epidemic communication, information floating, and their applications to safety and security focusing on the relationship with the characteristic mobility of mobile nodes in applications to safety/security. We also explain research on information floating from a new viewpoint, considering new factors such as that information floating causes changes in the behavior of mobile nodes, and this change in behavior affects information floating.
