US Patent No. 9,107,196
RECONNECTING DROPPED CALLS USING AN INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM
| Patent No. | 9,107,196 |
|---|---|
| Issue Date | August 11, 2015 |
| Title | Reconnecting Dropped Calls Using An Internet Protocol Multimedia Subsystem |
| Inventorship | Bejoy Pankajakshan, Olathe, KS (US) Warren B. Cope, Olathe, KS (US) Pallavur Sankaranaraynan, Overland Park, KS (US) |
| Assignee | Sprint Communications Company L.P., Overland Park, KS (US) |
Claim of US Patent No. 9,107,196
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.
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.