Detection and notification of end user presence via a telecommunications device

1. A method for detection and notification of called party presence via a telecommunication device associated with a called party comprising:

(a) receiving a request to establish a telecommunication session at the telecommunication device;

(b) obtaining presence information derived from presence detection equipment on the telecommunication device responsive to the received request;

(c) determining, via the telecommunication device, presence of the called party based on the obtained presence information; and

(d) sending a notification message including an indication of the determined presence of the called party.

2. The method of claim 1 , wherein the request includes a request for notification of called party presence.

3. The method of claim 1 , wherein determining presence of the called party based on the obtained presence information is performed by the telecommunication device.

4. The method of claim 1 , wherein privacy configuration settings set by the called party are checked prior to obtaining presence information, and wherein the presence information obtained is based on privacy configuration settings.

5. The method of claim 1 , wherein the presence detection equipment comprises at least one of an accelerometer, a gyroscope, a camera, a motion detector, an audio detector, a timer, geolocation determination equipment, or an interface to access historical presence information associated with the telecommunication device.

6. The method of claim 5 , wherein the historical presence information includes at least one of geolocation data, motion detection data, accelerometer data, telecommunication device use data, camera image data.

7. The method of claim 6 , wherein the historical presence information includes a timestamp of a last motion detected, or of a last change in geolocation.

8. The method of claim 1 , wherein the presence detection equipment includes at least one camera, and wherein presence of the called party is determined based on an analysis of images obtained by the at least one camera.

9. The method of claim 1 , wherein the presence detection equipment includes geolocation detection equipment, and wherein presence of the called party is determined based on changes in a location of the telecommunication device obtained from the geolocation detection equipment.

10. The method of claim 1 , wherein presence of the called party is determined based on an elapsed time of last use of at least one of the telecommunication device or of another device associated with the called party.

11. The method of claim 1 , wherein the notification message sent further includes an amount of time that has elapsed since the telecommunication device was at least one of last used or moved, or the last time motion was detected by the telecommunication device.

12. The method of claim 1 , wherein the request is a Session Initiation Protocol (SIP) INVITE message including the request for notification of called party presence.

13. The method of claim 12 , wherein the request for notification of called party presence is included in a header of the SIP INVITE message.

14. The method of claim 1 , wherein the notification message is one of a SIP TRYING response or a SIP RINGING response generated including the indication of the determined presence of the called party.

15. A method for notifying a calling party of presence of a called party comprising:

(a) sending a request to establish a telecommunication session, wherein the request includes a request for notification of called party presence;

(b) receiving a notification message including called party presence information, wherein the called party presence information is derived from presence detection equipment on the called party device;

(c) selecting one of a plurality of ringback tones to play to the calling party based on received called party presence information; and

(d) playing the selected ringback tone to the calling party.

16. The method of claim 15 , wherein a first ringback tone is selected and played when the called party presence information received indicates that the called party is present, and wherein a second ringback tone is selected and played when the called party presence information received indicates that the called party is not present.

17. A method for notifying a calling party of presence of a called party comprising:

(a) receiving a request to establish a telecommunication session between a calling device and a called device;

(b) obtaining called party presence information derived from presence detection equipment on the called party device;

(c) determining presence of the called party based on the obtained presence information; and

(d) notifying the calling party of the determined presence of a called party.

18. The method of claim 17 , wherein the presence detection equipment comprises at least one of an accelerometer, a gyroscope, a camera, a motion detector, an audio detector, a timer, geolocation determination equipment, or an interface to access historical presence information associated with the called device.

19. The method of claim 18 , wherein the historical presence information includes at least one of geolocation data, motion detection data, accelerometer data, telecommunication device use data, camera image data.

20. The method of claim 17 , wherein the calling party is notified of the determined presence of a called party by playing a specific ringback tone indicating the presence of a called party.