System and method for processing dropped calls

• US 5,995,830 A
• Filed: 04/09/1997
• Issued: 11/30/1999
• Est. Priority Date: 04/09/1997
• Status: Expired due to Term

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Wireless Services Incorporated (AT&T, Inc.)
• Inventors: Rotvold, Bruce E., Amin, Umesh J.
• Primary Examiner(s): Kuntz, Curtis A.
• Assistant Examiner(s): Barnie, Rexford N
• Application Number:
  US08/838,659
• Time in Patent Office: 965 Days
• Field of Search: 379/2, 379/34, 379/26, 379/67, 379/67.1, 379/10, 379/12, 379/22, 379/23, 379/24, 379/25, 379/27, 379/1, 379/8, 379/18, 455/8-9, 455/33.2, 455/98, 455/58, 455/59, 455/115, 455/134, 455/436, 455/439, 455/423, 455/561-562, 455/560, 455/421, 455/413
• US Class Current: 455/423
• CPC Class Codes: H04M 3/42 Systems providing special services or facilities to subscribers specially adapted for wireless communication networks H04W4/00
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements

Abstract

A method and apparatus for processing dropped calls. If, during an established call between two communication devices, a telecommunication network node determines that a communication link to one of the devices has been dropped, the node determines the cause of the dropped communication link and sends a status message to the non-dropped communication device. If a reconnection attempt is appropriate, the node attempts to reconnect to the dropped device. If a reconnection attempt is not appropriate, or if the reconnection attempt is unsuccessful, the non-dropped communication device is connected to a voice mail node. If the reconnection attempt is successful, the call between the two communication devices is re-established.

Claims

1. A method for processing a telephone call between at least two communication devices comprising the steps of:

determining, during an established call between said communication devices, that a connection to one of said communication devices has been dropped;

determining the reason that said connection to the one communication device has been dropped; and

determining whether to attempt to reconnect to said one communication device based on said reason.

2. The method of claim 1 further comprising the step of sending a status message to the other communication device indicating the reason that said connection to the one communication device has been dropped.

3. The method of claim 1 further comprising the step of:

reconnecting to said one communication device; and

re-establishing said telephone call.

4. The method of claim 3 further comprising the step of:

determining a telephone number of said one communication device from a network node.

5. The method of claim 3 further comprising the step of:

sending a reconnection indication to the other communication device upon a successful reconnection to said one communication device.

6. The method of claim 1 further comprising the step of:

attempting to reconnect to said one communication device; and

if said reconnection fails, connecting said other communication device to voice mail.

7. The method of claim 1 wherein said one communication device is a wireless communication device operating in conjunction with a wireless communication network having a coverage area, said method further comprising the step of:

determining that said connection to said wireless communication device has been dropped because said wireless communication device has traveled outside the coverage area of the wireless communication network; and

connecting said other communication device to voice mail without attempting to reconnect to said wireless communication device.

8. The method of claim 1 wherein said one communication device is a wireless telephone.

9. The method of claim 1 wherein said one communication device is a landline telephone.

19. The method of claim 8 wherein said step of determining the reason that said connection to the one communication device has been dropped further comprises the step of:

analyzing a mobile assisted handoff list previously received from said wireless telephone.

20. The method of claim 8 wherein said step of determining the reason that said connection to the one communication device has been dropped further comprises the step of:

performing statistical analysis of a wireless telephone communication system.

10. A telecommunication system for processing a telephone call between at least two communication devices comprising:

means for determining, during an established call between said communication devices, that a connection to one of said communication devices has been dropped;

means for determining the reason that said connection to the one communication device has been dropped; and

means for determining whether to attempt to reconnect to said one communication device based on said reason.

11. The system of claim 10 further comprising means for sending a status message to the other communication device indicating the reason that said connection to the one communication device has been dropped.

12. The system of claim 10 further comprising:

means for reconnecting to said one communication device; and

means for re-establishing said telephone call.

13. The system of claim 12 further comprising:

means for determining the telephone number of said one communication device from a network node.

14. The system of claim 12 further comprising:

means for sending a reconnection indication to the other communication device upon a successful reconnection to said one communication device.

15. The system of claim 10 further comprising:

means for attempting to reconnect to said one communication device; and

means for connecting said other communication device to voice mail if said reconnection fails.

16. The system of claim 10 wherein said one communication device is a wireless communication device operating in conjunction with a wireless communication network having a coverage area, said system further comprising:

means for determining that said connection to said wireless communication device has been dropped because said wireless communication device has traveled outside the coverage area of the wireless communication network; and

means for connecting said other communication device to voice mail without attempting to reconnect to said wireless communication device.

17. The system of claim 10 wherein said one communication device is a wireless telephone.

18. The system of claim 10 wherein said one communication device is a landline telephone.

21. The system of claim 17 wherein said means for determining the reason that said connection to the one communication device has been dropped further comprises:

means for analyzing a mobile assisted handoff list previously received from said wireless telephone.

22. The system of claim 17 wherein said means for determining the reason that said connection to the one communication device has been dropped further comprises the step of:

means for performing statistical analysis of a wireless telephone communication system.