Method for data exchange with a mobile asset considering communication link quality
First Claim
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1. A method of data exchange with a mobile asset moving along a route, the method comprising;
- determining the quality of a respective communication link for each of a plurality of segments along the route;
determining the position of the mobile asset along the route;
initiating operation of the communication link for data transfer with the mobile asset only when the communication link quality in the segment including the position of the mobile asset exceeds a predetermined value.
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Abstract
A method for data exchange with a mobile asset including the step of comparing the quality of the communication link to a predetermined value prior to initiating the communication. Polling of a fleet of mobile assets may be scheduled by considering a map of the communication link quality along the route of the mobile assets. An optimal packet size may be selected for the data transfer by considering the quality of the communication link.
46 Citations
13 Claims
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1. A method of data exchange with a mobile asset moving along a route, the method comprising;
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determining the quality of a respective communication link for each of a plurality of segments along the route;
determining the position of the mobile asset along the route;
initiating operation of the communication link for data transfer with the mobile asset only when the communication link quality in the segment including the position of the mobile asset exceeds a predetermined value. - View Dependent Claims (2, 3, 4, 5)
determining a duration of communication necessary for the data transfer;
identifying all segments that will include the position of the mobile asset within the duration of communication;
initiating the operation of the communication link only when the communication link quality of all segments that will include the position of the mobile platform during the duration of communication exceed a predetermined value.
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3. The method of claim 1, wherein determining a quality of a communication link further comprises:
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installing a global positioning system on the mobile asset;
installing a sensor measuring the communication link quality on the mobile asset;
recording communication link quality data as a function of location at a plurality of locations as the mobile asset moves along the route to define a file of signal quality data.
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4. The method of claim 3, further comprising:
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manipulating the measured location and link quality data to define the plurality of route segments; and
processing the measured location and link quality data to establish a communication link quality for each route segment.
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5. The method of claim 1, further comprising selecting a packet size for the data transfer as a function of the communication link quality of the segment in which the mobile asset is located.
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6. A method of data exchange with a mobile asset moving along a route, the method comprising:
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determining a communication link quality for each of a plurality of segments along the route;
determining the segment in which the mobile asset is located;
initiating the operation of a communication link for data transfer with the mobile asset; and
selecting the packet size for the data transfer as a function of the communication link quality for the segment in which the mobile asset is located. - View Dependent Claims (7, 8)
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9. A method of scheduling the polling of a plurality of mobile assets over a communication link, the method comprising:
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defining a plurality of geographic segments, each segment having a quality associated with a communication link;
scheduling the polling of a plurality of mobile assets for data transfer to occur via the communication link for each asset in a segment having communication link quality above a predetermined value. - View Dependent Claims (10)
installing a global positioning system and a sensor for measuring the communication link quality on a mobile asset;
recording the communication link quality as a function of location at a plurality of locations to define a file of signal quality data;
dividing the data into segments having signal quality data that is within a predetermined range within each segment; and
calculating a representative value for the communication link quality for each segment.
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11. A method of mapping the quality of a communication link over a route of a mobile asset, the method comprising:
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installing a global positioning system on a mobile asset;
installing a sensor for measuring a communication link quality on the mobile asset;
recording on-board the mobile asset the communication link quality as a function of location at a plurality of locations as the mobile asset moves along a route to define a file of signal quality data;
transferring the file to an off-board database; and
analyzing the database to generate a map of the communication link quality over the route. - View Dependent Claims (12, 13)
dividing the route into segments having communication link quality data that is within a predetermined range within each segment;
calculating a representative value for the communication link quality for each segment.
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13. The method of claim 11, wherein the mobile asset comprises a first mobile asset and the file of signal quality data comprises a first file of signal quality data, and further comprising:
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installing a global positioning system on a second mobile asset;
installing a means for measuring a communication link quality on the second mobile asset;
recording on-board the second mobile asset the communication link quality as a function of location at a plurality of locations as the second mobile asset moves along a route to define a second file of signal quality data; and
transferring the second file to the off-board database.
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Specification