PORTABLE COMMUNICATION TERMINAL AND COMMUNICATION METHOD, ANTI-THEFT DEVICE AND ANTI-THEFT METHOD, AND ANTI-THEFT SYSTEM

摘要

PURPOSE: To surely prevent the theft of a vehicle of low cost. CONSTITUTION: A user of an automobile 31 previously registers ON/OFF of a security mode in a center device 33. Abnormality, when detected by a sensor 41, is notified from an on-vehicle communication device 43 via a communication network 34 to a center communication device 52. When the security mode is on an ON state, a center control device 51 notifies abnormality via the communication network 34 to a portable telephone 32 held by the user of the automobile 31.