Monitoring geospatial context of a mobile device

1. A computer-implemented method of assessing whether a mobile device is in a geospatial area, the method comprising:

receiving, at a mobile device, a representation of a non-circular geospatial zone;

causing storage of the representation of the non-circular geospatial zone in a memory of the mobile device;

determining, based at least in part on the non-circular geospatial zone, an outer circular boundary entirely encompassing the non-circular geospatial zone, wherein the outer circular boundary is defined by at least a centroid of the non-circular geospatial zone and a maximum radius;

determining, based at least in part on the non-circular geospatial zone, an inner circular boundary entirely encompassed within the non-circular geospatial zone, wherein the inner circular boundary is defined by at least the centroid of the non-circular geospatial zone and a minimum radius;

computing a current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the computed current distance both exceeds the minimum radius and does not exceed the maximum radius, utilizing the non-circular geospatial zone to determine a context of the mobile device.

2. The computer-implemented method of claim 1 further comprising:

computing an updated current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the updated current distance does not exceed the minimum radius, determining that the mobile device is within the geospatial zone.

3. The computer-implemented method of claim 2 , where no context notification is transmitted from the mobile device while the mobile device remains within the geospatial zone.

4. The computer-implemented method of claim 1 further comprising:

computing an updated current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the updated current distance exceeds the maximum radius, determining that the mobile device is outside of the geospatial zone.

5. The computer-implemented method of claim 4 further comprising transmitting a context notification to a call processing entity reflecting that the mobile device is outside of the non-circular geospatial zone.

6. The computer-implemented method of Claim 1 , wherein management of requests for communication including the mobile device is defined in terms of a transmitted context state.

7. The computer-implemented method of claim 1 , wherein the current distance of the mobile device from the centroid of the non-circular geospatial zone is computed based at least in part on sensor-based location data of the mobile device.

8. The computer-implemented method of claim 7 , wherein the sensor-based location data corresponds to global positioning system data.

9. A system comprising:

a data store including a representation of a non-circular geospatial zone:

a processor associated with a mobile device and configured with computer-executable instructions that, when executed by the processor, cause the processor to:

retrieve the representation of the non-circular geospatial zone:

determine, based at least in part on the non-circular geospatial zone, an outer circular boundary entirely encompassing the non-circular geospatial zone, wherein the outer circular boundary is defined by at least a centroid of the non-circular geospatial zone and a maximum radius;

determine based at least in part on the non-circular geospatial zone, an inner circular boundary entirely encompassed within the non-circular geospatial zone, wherein the inner circular boundary is defined by at least the centroid of the non-circular geospatial zone and a minimum radius;

compute a current distance of the mobile device from the centroid of the non-circular geospatial zone;

in response to a determination that the current distance both exceeds the minimum radius and does not exceed the maximum radius, utilize the non-circular geospatial zone to determine a context of the mobile device.

10. The system claim 9 , wherein the current distance of the mobile device from the centroid of the non-circular geospatial zone is computed based at least in part on sensor-based location data of the mobile device.

11. The system of claim 10 , wherein the sensor-based location data corresponds to location data previously associated with a known location.

12. The system of claim 11 , wherein the known location is a wireless node, and wherein the computer-executable instructions further cause the processor to:

detect a signal from a transmitter, wherein the signal includes a transmitter identifier; and

recall previously stored location information according to the transmitter identifier; and

wherein the current distance of the mobile device from the centroid of the non-circular geospatial zone is computed based at least in part on the previously stored location information.

13. The system claim 9 , wherein the computer-executable instructions further cause the processor to:

compute an updated current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the updated current distance does not exceed the minimum radius, determine that the mobile device is within the non-circular geospatial zone.

14. The system claim 13 , where no context notification is transmitted from the mobile device while the mobile device remains within the non-circular geospatial zone.

15. The system claim 9 , wherein the computer-executable instructions further cause the processor to:

compute an updated current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the updated current distance exceeds the maximum radius, determine that the mobile device is outside of the non-circular geospatial zone.

16. The system of claim 15 further comprising transmitting a context notification to a call processing entity reflecting that the mobile device is outside of the non-circular geospatial zone.

17. The system of claim 9 , wherein the computer-executable instructions further cause the processor to modify a length of time until the mobile device reassesses whether it is located in the non-circular geospatial zone, and wherein the length of time is based at least partially on the current distance of the mobile device from the centroid of the non-circular geospatial zone.

18. The system of claim 9 , wherein said mobile device is associated with a bearing and a velocity and wherein the length of time is further based at least partially upon a determination, based on the bearing and velocity, of whether a future position associated with the mobile device will intersect an outer boundary of the non-circular geospatial zone.

19. A non-transitory, computer-readable medium including computer-executable instructions comprising:

first computer-executable instructions that, when executed by a mobile device, cause the mobile device to receive a representation of a non-circular geospatial zone and to maintain within a memory of the mobile device the representation of the non-circular geospatial zone;

second computer-executable instructions that, when executed by the mobile device, cause the mobile device to determine, based at least in part on the non-circular geospatial zone, an outer circular boundary entirely encompassing the non-circular geospatial zone and an inner circular boundary entirely encompassed within the non-circular geospatial zone, wherein the outer circular boundary is defined by at least a centroid of the non-circular geospatial zone and a maximum radius, and wherein the inner circular boundary is defined by at least the centroid of the non-circular geospatial zone and a minimum radius; and

third computer-executable instructions that, when executed by the mobile device, cause the mobile device to compute a current distance of the mobile device from the centroid of the non-circular geospatial zone and, in response to a determination that the current distance both exceeds the minimum radius and does not exceed the maximum radius, utilize the non-circular geospatial zone to determine a context of the mobile device.

20. The non-transitory, computer-readable medium claim 19 , wherein the computer-executable instructions further cause the processor to:

compute an updated current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the updated current distance does not exceed the minimum radius, determine that the mobile device is within the non-circular geospatial zone.

21. The non-transitory, computer-readable medium claim 20 , wherein no context notification is transmitted from the mobile device while the mobile device remains within the non-circular geospatial zone.

22. The non-transitory, computer-readable medium claim 19 , wherein the third computer-executable instructions further cause the mobile device to:

compute an updated current distance of the mobile device from the centroid of the non-circular geospatial zone; and

in response to a determination that the updated current distance exceeds the maximum radius, determine that the mobile device is outside of the non-circular geospatial zone.

23. The non-transitory, computer-readable medium claim 22 , wherein the third computer-executable instructions further cause the mobile device to transmit a context notification to a call processing entity reflecting that the mobile device is outside of the non-circular geospatial zone.

24. The non-transitory, computer-readable medium claim 19 , wherein the third computer-executable instructions further cause the mobile device to modify a length of time until the mobile device reassesses whether it is located in the non-circular geospatial zone, and wherein the length of time is based at least partially on the current distance of the mobile device from the centroid of the non-circular geospatial zone.