Asset tracking system and method

An asset tracking system comprising:

• a reference terminal;
• a plurality of asset terminals installed on an asset to be tracked and configured to perform UWB communication with the reference terminal and measure a relative location based on the reference terminal;
• and
• a management server configured to collect asset locations and the relative locations from the plurality of asset terminals and correct the asset locations of the asset terminals using the relative locations,
• wherein the plurality of asset terminals generate relative locations through UWB communication therebetween and form one or more groups including one master asset terminal and a plurality of slave asset terminals based on the relative locations,
• the plurality of slave asset terminals are installed on assets to be tracked to perform UWB communication with the master asset terminal belonging to the same group and measure relative locations based on the master asset terminal,
• the master asset terminal is the reference terminal and is installed on the asset to be tracked to measure asset locations based on the GPS signals and collect relative locations from the plurality of slave asset terminals belonging to the same group, and
• the management server collects the asset location of the master asset terminal and the relative locations of the plurality of slave asset terminals from the master asset terminal of each group, sets the asset location to a reference location, reflects the relative location in the asset location based on the reference location, and generates corrected asset locations of the plurality of salve asset terminals.

An asset tracking method performed by a management server capable of communicating with a reference terminal and a plurality of asset terminals, comprising:

• collecting asset locations generated based on GPS signals from the plurality of asset terminals;
• collecting relative locations based on the reference terminal generated through UWB communication between the reference terminal and the asset terminals from the plurality of asset terminals;
• generating a reference location corresponding to the reference terminal based on the asset locations collected in the collecting of the asset locations;
• and
• setting the reference location generated in the generating of the reference location to a reference point and generating a location moved in a direction of a relative location from the reference point by a distance of the relative location as the corrected asset locations.

An asset tracking method comprising:

• forming, by a plurality of asset terminals, one or more groups through mutual communication;
• setting a master asset terminal and a plurality of slave asset terminals of a group by asset terminals belonging to each group in the forming of the group;
• collecting, by a management server, one of asset locations of the plurality of slave asset terminals generated based on GPS signals from the master asset terminal of each group and an asset location of the master asset terminal;
• collecting, by the management server, relative locations of the plurality of slave asset terminals based on the master asset terminal from the master asset terminal of each group;
• setting, by the management server, a reference location based on the asset location of the master asset terminal collected in the collecting of the asset location;
• and
• reflecting, by the management server, the relative locations based on the reference location generated in the generating of the reference location to generate corrected asset locations of the plurality of slave asset terminals.