Method for reducing capacity demands for conveying geographic location information over capacity constrained wireless systems
First Claim
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1. A method for transmitting geographic locations of a mobile object to a principal entity over a wireless communications system, comprising:
- sending a full position transmission comprising absolute latitude and longitude coordinates of a first position of the mobile object to the principal entity;
determining a second position of the mobile object and whether the second position is within a geographic area that includes the first position;
if the second position is within the geographic area, sending a delta position transmission to the principal entity comprising a numeric value representing longitude and latitude coordinates of the second position relative to the previously transmitted absolute coordinates of the first position; and
if the second position is outside the geographic area, sending a full position transmission comprising absolute latitude and longitude coordinates of the second position to the principal entity.
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Abstract
The present invention enables efficient communication of location identification of remote movable objects or vehicles over capacity-constrained wireless communications systems by transmitting only the truncated latitude and longitude coordinate data relative to a dynamically alterable and previously unknown coordinate reference anchor.
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Citations
19 Claims
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1. A method for transmitting geographic locations of a mobile object to a principal entity over a wireless communications system, comprising:
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sending a full position transmission comprising absolute latitude and longitude coordinates of a first position of the mobile object to the principal entity;
determining a second position of the mobile object and whether the second position is within a geographic area that includes the first position;
if the second position is within the geographic area, sending a delta position transmission to the principal entity comprising a numeric value representing longitude and latitude coordinates of the second position relative to the previously transmitted absolute coordinates of the first position; and
if the second position is outside the geographic area, sending a full position transmission comprising absolute latitude and longitude coordinates of the second position to the principal entity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for efficient transmission of geographic locations of a mobile object to a principal entity over a wireless communications system, comprising:
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receiving absolute latitude and longitude coordinates of the mobile object at a first position;
determining whether the absolute coordinates are the first coordinates received during a continuous period of sequential asynchronous location identification;
if the coordinates are the first coordinates received during the period, sending a full position transmission comprising the absolute coordinates to the principal entity and establishing a geographic area centered at the absolute coordinates and having a predetermined size;
if the coordinates are not the first coordinates received during the period, determining whether the absolute coordinates are within a previously established geographic area centered at previously transmitted absolute coordinates and having a predetermined size;
if the coordinates are within the previously established geographic area, sending a delta position transmission to the principal entity comprising a numeric value representing longitude and latitude coordinates of the first position relative to previously transmitted absolute coordinates; and
if the coordinates are outside the previously established geographic area, sending a full position transmission comprising the absolute coordinates to the principal entity and establishing a geographic area centered at the absolute coordinates and having a predetermined size. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification