A message filtering system is provided for filtering generally broadcast messages received by a movable unit. The generally broadcast message includes an information segment including location, time, and/or velocity details relating to an event of potential interest for the unit. The movement history of the unit is stored along with data selection information. A determination is made as to whether the information contained in the broadcast information segment is of interest based on this stored information.
Patent Number: 6,522,250
Date Issued: February 18 2003