Method and apparatus for handling 2-D fixes

摘要

The present invention provides a system for increasing the reliability of location data received from a container monitoring unit. According to a first embodiment, the system includes a GPS mesh network device to communicate with existing GPS devices and a remote monitoring station which receives data from unit devices applying back-end analysis for determining the most accurate and robust geo-location for each unit. The present invention provides a method to coordinate analysis of data to improve determination of the exact location and status of assets. This increased visibility will enable the customer to pinpoint the real time location of a single box more. This level of real time asset management translates into greater operational efficiency and performance, cost reductions, and improved safety and security.

主权项

1. In a transportation system including at least a first container monitored by a first monitoring unit and having a first GPS transponder, and a second container monitored by a second monitoring unit and having a second GPS transponder, a method for determining the location of at least one container, the method comprising:
determining the location for the first container from the first GPS transponder; determining the location of the second container from the second GPS transponder; initiating a request by the first monitoring unit for location and identifying data from the second container; reporting the location and identifying data from the first and second containers to a remote monitoring station; initiating a request by the second monitoring unit for location and identifying data from at least a third container; reporting data collected by the second container to a remote monitoring station; determining a derived location for the first and second containers based on the time and direction of the signals received from the first and second container monitoring units at the remote monitoring station; comparing the derived location of the first and second containers to the GPS determined locations of the first and second containers; creating adjusted location data for the first container based on a comparison of the derived location of the first container and the GPS determined location of the first container; and transmitting the adjusted location data to the first container.