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Method and apparatus for traffic management

  • US 9,424,744 B2
  • Filed: 10/18/2010
  • Issued: 08/23/2016
  • Est. Priority Date: 10/30/2009
  • Status: Expired due to Fees
First Claim
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1. A method for determining travel time of a vehicle on a road, wherein the vehicle is operable within a mobile communication network, comprising:

  • collecting historical communication events of a mobile user in order to obtain travel samples, wherein the historical communication events indicate when the mobile user travelled along a monitored road;

    determining a cell handover sequence from the historical communication events;

    determining from the cell handover sequence, one of more road segments of the monitored road;

    determining the travel time of the one or more road segments according to the travel time samples;

    selecting, for an undetermined road segment of the monitored road for which the real-time travel time is not determined from the collected historical communication events, a candidate mobile user that is most likely to appear on the undetermined road segment;

    calculating a travel probability of each mobile user to pass the undetermined road segment at a specified time, said candidate mobile user being selected based on said calculated travel probability, the travel probability of a mobile user being calculated as a function of an estimated speed and a speed vector of the mobile user on the monitored road, said estimated speed calculated by;

    computing a minimum travel speed and a maximum travel speed of the each mobile user, the minimum and maximum travel speed of the each mobile user computed as a function of;

    a distance from a position of a cell to which the each mobile user belongs at a current time to a start point of the undetermined road segment, a coverage radius of the cell, a length of the undetermined road segment, and the current time;

    actively positioning the candidate mobile user to obtain positioning information; and

    returning to the step of collecting communication events of a mobile user currently on a monitored road with the active positioning as one communication event for the candidate mobile user, to determine the real-time travel time of the undetermined road segment.

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