Predictive data prefetching for connected vehicles

Patent metadata

Field	Value
Publication number	US-10630803-B2
Application number	US-201615198741-A
Country	US
Kind code	B2
Filing date	Jun 30, 2016
Priority date	Jun 30, 2016
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Embodiments of the present disclosure are directed to a computer implemented method of receiving data at a vehicle having control circuitry configured to wirelessly couple a processor system of the vehicle to a network. The method includes determining, using the processor system, a route that is expected to be traveled by the vehicle. The method further includes determining, using the processor system, a portion of the route that includes a buffering zone, wherein the buffering zone comprises an area in which the strength of signals transmitted over the network meets a predetermined criterion. The method further includes, based at least in part on a determination that the vehicle is within the buffering zone, pre-fetching data from a source over the network.

First claim

What is claimed is:

1. A computer implemented method of receiving data at a vehicle having control circuitry configured to wirelessly couple a processor system in the vehicle to a network, the method comprising:
determining, using the processor system, a route that is expected to be traveled by the vehicle;
segmenting, using the processor, the route to identify a first zone, a second zone, and a third zone of the route;
wherein the first zone is identified based at least in part on a presence in the first zone of a first strength of signals transmitted over the network;
wherein the second zone is identified based at least in part on a presence in the second zone of a second strength of signals transmitted over the network;
wherein the third zone is identified based at least in part on a presence of a third strength of signals transmitted over the network;
wherein the first strength of signals is greater than the third strength of signals;
wherein the second strength of signals is between the first strength of signals and the third strength of signals;
determining, using the processor system, a start and an end of the first zone of the route, wherein the first zone comprises a buffering zone, wherein the start and the end of the buffering zone defines an area of the route in which the first strength of signals transmitted over the network meets a predetermined criterion; and
based at least in part on a determination that the vehicle is within the buffering zone, pre-fetching data from a source over the network.

2. The computer implemented method of claim 1 further comprising, based at least in part on the determination that the vehicle is within the buffering zone, increasing a size of a buffer for prefetching the data.

3. The computer implemented method of claim 1 further comprising:
storing the pre-fetched data in a memory;
wherein the third zone comprises a dead zone;
determining, using the processor system, a portion of the route that includes the dead zone, wherein the dead zone comprises an area in which the third strength of signals transmitted over the network meets another predetermined criterion; and
based at least in part on a determination that the vehicle is within the dead zone, accessing the pre-fetched data from the memory.

4. The computer implemented method of claim 3 , wherein determining the portion of the route that includes the dead zone is based at least in part on a factor selected from the group consisting of:
the route;
a signal coverage map; and
environmental conditions.

5. The computer implemented method of claim 3 , wherein the portion of the route that includes the dead zone is further along the route than the portion of the route that includes the buffering zone.

6. The computer implemented method of claim 3 further comprising:
determining, using the processor system, an amount of data to pre-fetch based at least in part on a factor selected from the group consisting of:
an estimated period of time that the vehicle will be in the dead zone;
an estimate period of time that the vehicle will be in the buffering zone;
an estimated period of time that it will take the vehicle to travel from the buffering zone to the dead zone;
an estimated distance on the route from the buffering zone to the dead zone;
an estimated distance on the route from a beginning of the buffering zone to an end of the buffering zone; and
an estimated distance on the route from a beginning of the dead zone to an end of the dead zone.

7. The computer implemented method of claim 1 , wherein the predetermined criterion comprises meeting or exceeding a level of correlation between a location of the vehicle on the route and the strength of signals transmitted over the network.

8. The computer implemented method of claim 7 , wherein the level of correlation comprises a correlation coefficient.

9. The computer implemented method of claim 8 , wherein the correlation coefficient comprises a Pearson product-moment correlation coefficient.

10. The computer implemented method of claim 3 , wherein the another predetermined criterion comprises meeting or falling below a level of correlation between a location of the vehicle on the route and the strength of signals transmitted over the network.

11. The computer implemented method of claim 10 , wherein the level of correlation comprises a correlation coefficient.

12. The computer implemented method of claim 11 , wherein the correlation coefficient comprises a Pearson product-moment correlation coefficient.

13. The computer implemented method of claim 3 further comprising selecting, using the processor system, the route from multiple possible routes based at least in part on the dead zone.

14. A computer program product for receiving data at a vehicle having control circuitry configured to wirelessly couple a processor system of the vehicle to a network, the computer program product comprising:
a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable by the processor system to cause the processor system to perform a method comprising:
determining a route that is expected to be traveled by the vehicle;
segmenting the route to identify a first zone, a second zone, and a third zone of the route;
wherein the first zone is identified based at least in part on a presence in the first zone of a first strength of signals transmitted over the network;
wherein the second zone is identified based at least in part on a presence in the second zone of a second strength of signals transmitted over the network;
wherein the third zone is identified based at least in part on a presence of a third strength of signals transmitted over the network;
wherein the first strength of signals is greater than the third strength of signals;
wherein the second strength of signals is between the first strength of signals and the third strength of signals;
determining a start and an end of the first zone of the route, wherein the first zone comprises a buffering zone, wherein the start and the end of the buffering zone defines an area of the route in which the first strength of signals transmitted over the network meets a predetermined criterion; and
based at least in part on a determination that the vehicle is within the buffering zone, pre-fetching data from a source over the network.

15. The computer program product of claim 14 , wherein the method performed by the processor system further comprises, based at least in part on the determination that the vehicle is within the buffering zone, increasing a size of a buffer for prefetching the data.

16. The computer program product of claim 14 , wherein the method performed by the processor system further comprises:
storing the pre-fetched data in a memory;
wherein the third zone comprises a dead zone;
determining, using the processor system, a portion of the route that includes the dead zone, wherein the dead zone comprises an area in which the third strength of signals transmitted over the network meets another predetermined criterion; and
based at least in part on a determination that the vehicle is within the dead zone, accessing the pre-fetched data from the memory.

17. The computer program product of claim 16 , wherein determining the portion of the route that includes the dead zone is based at least in part on a factor selected from the group consisting of:
the route;
a signal coverage map; and
environmental conditions.

Assignees

• IBM

Inventors

• Hwang Jinho
• Rajagopalan Shriram

Classifications

• G01C21/3461

  Preferred or disfavoured areas, e.g. dangerous zones, toll or emission zones, intersections, manoeuvre types or segments such as motorways, toll roads or ferries · CPC title

• H04L67/12

  specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks · CPC title

• H04L67/2847 Primary

  Electricity · mapped topic

• H04W4/44 Primary

  for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] · CPC title

• H04L67/5681 Primary

  Pre-fetching or pre-delivering data based on network characteristics · CPC title