US8069365B2 - Method and device for realizing IP multimedia subsystem disaster tolerance -
Google Patents US8069365B2 - Method and device for realizing IP multimedia subsystem …

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 …

BACKGROUND In a typical cellular system, also referred to as a wireless communications
network, wireless terminals, also known as mobile stations and/or user equipment units …

A method of facilitating P-CSCF restoration when a P-CSCF failure has occurred is
disclosed. The method comprises a Proxy Call Session Control Function,'P-CSCF'receiving …

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 …

(57) A communication system controls a Long Term Evolution (LTE) media session with an
Internet Multimedia Subsystem (IMS). An LTE Packet Gateway (P-GW) establishes an IMS …

A method performed by a network node in a communications network, for handling of
discovery of entrance points of a User Equipment (UE) to an IP Multimedia Subsystem (IMS) …

A method for realizing an lntemet protocol (1P) multimedia subsystem (IMS) disaster
tolerance includes the steps as fol lows. An S-CSCF receives a user registration, and backs …

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 …

A method, a related apparatus, and a system for recovering a called service of a terminal are
provided. The method includes: when a called request of a user terminal is received …