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Methods, systems, and computer program products for message filtering based on previous path trajectories and probable destination

  • US 8,792,907 B2
  • Filed: 05/14/2012
  • Issued: 07/29/2014
  • Est. Priority Date: 06/28/2007
  • Status: Active Grant
First Claim
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1. A method of receiving a message at a movable unit in a wireless mobile network, comprising:

  • determining, using a processor, a potential trajectory of the movable unit over a pre-determined time period, the determining including;

    adding a current spatial position of the movable unit to a trajectory history of the movable unit,identifying, from the trajectory history, paths that cross into a target geographical region,tracing the identified paths away from the target geographical region for the pre-determined time period to establish a set of candidate path segments,determining a radial distance of the current spatial position of the movable unit,identifying a path segment, among the set of candidate path segments, that falls within the radial distance of the current spatial position of the movable unit,computing a travel direction for the movable unit based on the trajectory history, andselecting the identified path segment that falls within the radial distance of the current spatial position as the potential trajectory;

    receiving at the movable unit, a generally broadcast message relating to the target geographical region;

    storing the generally broadcast-message at the movable unit; and

    outputting the generally broadcast-message in response to the potential trajectory crossing into the target geographical region and falling within the radial distance of the current spatial position.

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