Methods and apparatus for mobility support between network domains
S Balasubramanian, M Bharadwaj - US Patent 8,780,857, 2014 - Google Patents
(54) METHODS AND APPARATUS FOR 7, 177,658 B2 2/2007 Willenegger et al. MOBILITY
SUPPORT BETWEEN NETWORK 7,433,929 B2 10/2008 Guilford et al. DOMAINS 7,539,373 …
SUPPORT BETWEEN NETWORK 7,433,929 B2 10/2008 Guilford et al. DOMAINS 7,539,373 …
Node failure detection system and method for sip sessions in communication networks
M Farrugia, M Stura, M Monti - US Patent App. 12/690,200, 2010 - Google Patents
The present invention relates to a failure detection method and system operating at the
session control layer, preferably within an IMS/SIP architecture, which monitors the status of …
session control layer, preferably within an IMS/SIP architecture, which monitors the status of …
Method and apparatus for handling P-CSCF failure and restoring connectivity
M Hallenstål, S Blau - US Patent 9,596,712, 2017 - Google Patents
A method for restoring connectivity between a node in an IP Multimedia Subsystem, IMS,
network, and a User Equipment, UE. The UE is associated with a Proxy Call Session Control …
network, and a User Equipment, UE. The UE is associated with a Proxy Call Session Control …
Methods and apparatus for mobility support and IP multimedia subsystem (IMS) registration in a multimode network environment
S Balasubramanian, M Bharadwaj - US Patent 8,743,887, 2014 - Google Patents
Described aspects provide for improving the mobility of wireless communication devices
between one network domain and another network domain, specifically, but not limited to …
between one network domain and another network domain, specifically, but not limited to …
Failure recovery in an ip multimedia subsystem network
MCB Vergara, H Przybysz, T Forsman… - US Patent App. 12 …, 2009 - Google Patents
BACKGROUND 0003 IP Multimedia services provide a dynamic combi nation of Voice,
video, messaging, data, etc. within the same session. By growing the number of basic …
video, messaging, data, etc. within the same session. By growing the number of basic …
System and method for determining trust for SIP messages
JHL Bakker - US Patent 7,895,302, 2011 - Google Patents
BACKGROUND The IP (Internet Protocol) Multimedia Subsystem (IMS) is a standardized
architecture for providing multimedia services and voice-over-IP calls to both mobile and …
architecture for providing multimedia services and voice-over-IP calls to both mobile and …
Communication-session termination when subscriber server is unavailable
P Lau - US Patent 9,247,418, 2016 - Google Patents
A communication session (eg, a telephone call, a Voice over Internet protocol (VoIP) call, a
video call, a short mes sage service (SMS), a text message, an instant message, or file …
video call, a short mes sage service (SMS), a text message, an instant message, or file …
Method, and related apparatus for recovering called service of terminal
H Li, YE Jinzhou, R Xu, B Zhang, S Shi… - US Patent …, 2018 - Google Patents
Embodiments of the present invention disclose a method, a related apparatus, and a system
for recovering a called service of a terminal. The method includes: when a called request of …
for recovering a called service of a terminal. The method includes: when a called request of …
Error handling during IMS registration
HFH Chiang - US Patent 10,051,017, 2018 - Google Patents
In instances where a user equipment (UE) encounters an issue during an attempt to register
for Internet Protocol Multimedia Subsystem (IMS) service, the UE is configured with …
for Internet Protocol Multimedia Subsystem (IMS) service, the UE is configured with …
Communication server
R Oda, J Tagane - US Patent App. 12/029,841, 2008 - Google Patents
The SIP server includes a SIP communication controller for controlling
transmission/reception of a SIP message complying with SIP, a SIP call controller for …
transmission/reception of a SIP message complying with SIP, a SIP call controller for …