IP Library › Granted Patent US 9,107,196
Granted Patent B2
US 9,107,196 · App. 14/096,659 · Granted Aug 11, 2015

Reconnecting dropped calls using an internet protocol multimedia subsystem

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Quick Facts
Patent No.
US 9,107,196
App. No.
14/096,659
Granted
Aug 11, 2015
Kind
B2
Abstract

A Session Initiation Protocol (SIP) system controls an Internet Protocol (IP) communication session between a first communication device and a second communication device. A SIP control server receives a SIP bye message from the first communication device indicating a loss of the IP communication session, and in response, transfers a notification request for the second communication device to a SIP registration server. The SIP registration server processes a SIP registration message from the second communication device, and in response to the notification request and the SIP registration message, transfers a registration notification for the second communication device to the SIP control server. The SIP control server receives the registration notification for the second communication device, and in response, transfers a SIP invite message to re-establish the IP communication session to the first communication device.

Claims (26)

1. A method of operating a Session Initiation Protocol (SIP) system to control an Internet Protocol (IP) communication session between a first communication device and a second communication device, the method comprising:

in a SIP control server, receiving a SIP bye message from the first communication device indicating a loss of the IP communication session with the second communication device, and in response, transferring a notification request for the second communication device to a SIP registration server, wherein the notification request requests a registration notification from the SIP registration server when the second communication device re-registers with the SIP registration server;

in the SIP registration server, processing a SIP registration message from the second communication device, and in response to the notification request and the SIP registration message, transferring the registration notification to the SIP control server; and

in the SIP control server, receiving the registration notification for the second communication device, and in response to the SIP bye message and the registration notification, transferring a SIP invite message to re-establish the IP communication session to the first communication device.

2. The method of claim 1 further comprising in the SIP control server, transferring another SIP invite message to re-establish the IP communication session to the second communication device.

3. The method of claim 1 wherein the SIP control server comprises an Internet Protocol Multimedia Subsystem (IMS) Call Session Control Function (CSCF).

4. The method of claim 1 wherein the SIP registration server comprises an Internet Protocol Multimedia Subsystem (IMS) Home Subscriber Server (HSS).

5. The method of claim 1 wherein the IP communication session comprises a voice session.

6. The method of claim 1 wherein the IP communication session comprises a video session.

7. The method of claim 1 wherein the first communication device transfers the SIP bye message to the SIP control server in response to detecting the loss of the IP communication session.

8. The method of claim 1 wherein the first communication device transfers the SIP bye message to the SIP control server in response to detecting the loss of the IP communication session by detecting that a time period since receiving packets from the second communication device exceeds a threshold.

9. The method of claim 1 wherein the second communication device comprises a mobile communication device.

10. The method of claim 1 wherein the second communication device comprises a Long Term Evolution (LTE) communication device.

11. A Session Initiation Protocol (SIP) system to control an Internet Protocol (IP) communication session between a first communication device and a second communication device, the SIP system comprising:

a SIP control server configured to receive a SIP bye message from the first communication device indicating a loss of the IP communication session with the second communication device, and in response, transfer a notification request for the second communication device to a SIP registration server, wherein the notification request requests a registration notification from the SIP registration server when the second communication device re-registers with the SIP registration server;

the SIP registration server configured to process a SIP registration message from the second communication device, and in response to the notification request and the SIP registration message, transfer the registration notification to the SIP control server; and

the SIP control server configured to receive the registration notification for the second communication device, and in response to the SIP bye message and the registration notification, transfer a SIP invite message to re-establish the IP communication session to the first communication device.

12. The SIP system of claim 11 wherein the SIP control server is configured to transfer another SIP invite message to re-establish the IP communication session to the second communication device.

13. The SIP system of claim 11 wherein the SIP control server comprises an Internet Protocol Multimedia Subsystem (IMS) Call Session Control Function (CSCF).

14. The SIP system of claim 11 wherein the SIP registration server comprises an Internet Protocol Multimedia Subsystem (IMS) Home Subscriber Server (HSS).

15. The SIP system of claim 11 wherein the IP communication session comprises a voice session.

16. The SIP system of claim 11 wherein the IP communication session comprises a video session.

17. The SIP system of claim 11 wherein the first communication device transfers the SIP bye message to the SIP control server in response to detecting the loss of the IP communication session.

18. The SIP system of claim 11 wherein the first communication device transfers the SIP bye message to the SIP control server in response to detecting the loss of the IP communication session by detecting that a time period since receiving packets from the second communication device exceeds a threshold.

19. The SIP system of claim 11 wherein the second communication device comprises a mobile communication device.

20. The SIP system of claim 11 wherein the second communication device comprises a Long Term Evolution (LTE) communication device.

Assignments (6)
RELEASE OF SECURITY INTEREST Recorded Aug 23, 2022
From: DEUTSCHE BANK TRUST COMPANY AMERICAS
To: SPRINT INTERNATIONAL INCORPORATED; IBSV LLC; LAYER3 TV, LLC; PUSHSPRING, LLC; T-MOBILE CENTRAL LLC; T-MOBILE USA, INC.; ASSURANCE WIRELESS USA, L.P.; BOOST WORLDWIDE, LLC; CLEARWIRE COMMUNICATIONS LLC; CLEARWIRE IP HOLDINGS LLC; SPRINTCOM LLC; SPRINT COMMUNICATIONS COMPANY L.P.; SPRINT SPECTRUM LLC
Reel/Frame 062595/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 4, 2021
From: SPRINT COMMUNICATIONS COMPANY L.P.
To: T-MOBILE INNOVATIONS LLC
Reel/Frame 055604/0001 →
TERMINATION AND RELEASE OF FIRST PRIORITY AND JUNIOR PRIORITY SECURITY INTEREST IN PATENT RIGHTS Recorded Apr 2, 2020
From: DEUTSCHE BANK TRUST COMPANY AMERICAS
To: SPRINT COMMUNICATIONS COMPANY L.P.
Reel/Frame 052969/0475 →
SECURITY AGREEMENT Recorded Apr 2, 2020
From: T-MOBILE USA, INC.; ISBV LLC; T-MOBILE CENTRAL LLC; LAYER3 TV, INC.; PUSHSPRING, INC.; BOOST WORLDWIDE, LLC; CLEARWIRE COMMUNICATIONS LLC; CLEARWIRE IP HOLDINGS LLC; CLEARWIRE LEGACY LLC; SPRINT COMMUNICATIONS COMPANY L.P.; SPRINT INTERNATIONAL INCORPORATED; SPRINT SPECTRUM L.P.; ASSURANCE WIRELESS USA, L.P.
To: DEUTSCHE BANK TRUST COMPANY AMERICAS
Reel/Frame 053182/0001 →
GRANT OF FIRST PRIORITY AND JUNIOR PRIORITY SECURITY INTEREST IN PATENT RIGHTS Recorded Mar 6, 2017
From: SPRINT COMMUNICATIONS COMPANY L.P.
To: DEUTSCHE BANK TRUST COMPANY AMERICAS
Reel/Frame 041895/0210 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 4, 2013
From: PANKAJAKSHAN, BEJOY; COPE, WARREN B.; SANKARANARAYNAN, PALLAVUR
To: SPRINT COMMUNICATIONS COMPANY L.P.
Reel/Frame 031715/0870 →