Patent ID: 8082002

Claim:
A container unit capable of communicating with a monitoring server, the container unit comprising: a cellular network radio; a short range radio; a power source; a wake-up unit; a memory; a connection set-up logic stored in the memory; wherein the container unit is configured to form a message in response to an event, the event relating to a container in which the container unit is placed; perform on the basis of the connection set-up logic at least two of the following connection set-up attempts: a) a connection through the short range radio directly to a gateway unit providing communication links between the container unit and the monitoring server; b) a connection through the short range radio to the gateway unit via at least one other container unit which is placed in another container; c) a connection through the cellular network radio to a base station of a cellular network; and, d) a connection through the short range radio directly or via at least one other container unit to such container unit which is capable to communicate with the base station; stop the connection set-up attempts when a number of the connection set-up attempts reaches a certain limit; start the connection set-up attempts when the wake-up unit responsive to movements has detected a movement of the container in which the container unit is placed; and send the message through an available connection towards the monitoring server when any of the connection set-up attempts results in the available connection to the gateway unit or to the base station of the cellular network, the container unit being further adapted to provide the monitoring server with routing information enabling it to communicate with the container unit by performing a step selected from a list containing: adding to the message its own container unit identifier; adding to the message at least one container unit identifier identifying a candidate container unit through which the container unit is able to send the message; adding its own container unit identifier to a second message received from another container unit before relaying said message to the available connection; and, any combination thereof .