| 摘要 |
A position tracking system for a plurality of mobile tractors (202) and trailers (208) includes an unique electronic identifier (210) for each of a plurality of trailers. For each tractor of a plurality of tractors, the position tracking system includes a navigation system for determining a current position of the tractor, an electronic identifier reader (308) for acquiring the electronic identifier (210) of a trailer (208) coupled to the tractor (202), and a position-reporting subsystem for reporting to a remote system the current position of the tractor and the electronic identifier (210) of the trailer (208) coupled to the tractor (202). In addition, the position tracking system includes, at each facility of a plurality of fixed-location facilities, one or more trailers located within the facility, and a trailer-presence reporting subsystem for reporting to the remote system the presence of the one or more trailers located within the facility. |
