Patent ID: 8502661
Filing Date: 2013-08-06
Classification: G08B

Abstract:
1. A container tracking system comprising a mobile unit configured to be coupled to a container to be tracked and to communicate with a ground control unit through a communication system; the mobile unit comprising positioning means, alarm means adapted to detect alarm conditions related to said container, and communication means adapted to generate a tracking signal containing position data of said mobile unit and, if present, alarm information associated with one or more alarm conditions related to said container; said mobile unit being configured to evolve to a low activity state whenever a communication unavailability condition of said tracking signal through said communication system occurs; said low activity state providing for switching off said positioning means and said communication means of said mobile unit; wherein said mobile unit is configured to remain in said low activity state for a predetermined wake-up time interval and is adapted to pass to an activation state, at the end of said wake-up time interval; wherein said mobile unit is configured so as to switch from said activation state to a coverage detection state in which said mobile unit checks the communication availability or unavailability of the tracking signal through said communication system.