Method, mobile terminal, transponder device and system for monitoring an object with respect to the mobile terminal

摘要

A system for monitoring an object includes a transponder device associated with the object and an acceleration sensor operable to provide an acceleration signal. The transponder device is operable to emit a radio signal based on the acceleration signal. A mobile terminal having a short range radio interface and a secondary radio interface, comprising a wireless network interface, is operable to communicate with the transponder device using the short range radio interface. The mobile terminal is operable to receive the radio signal so as to indicate that the object is present within a coverage area defined by the short range radio interface. The mobile terminal is operable to emit a first alert signal when the radio signal is not received by the mobile terminal within a first predetermined time interval. The transponder device is operable to repeatedly emit the radio signal during a second predetermined time interval when the radio signal is not received by the mobile terminal within the first predetermined time interval. The mobile terminal is operable to emit a second alert signal and communicate with a party of a communication network when the radio signal is not received by the mobile terminal within the second predetermined time interval.