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 …

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 …

Embodiments of the present disclosure relate to a method and an apparatus for a restoration
of a proxy call session control function, P-CSCF. A first aspect of the present disclosure …

(57) ABSTRACT A session management method performed by a session management
network element includes receiving a first request message, where the first request message …

Embodiments of this application provide a method and an apparatus for processing a
terminal that is performing a voice service, and a communications system. In the method, a …

Disclosed is a method in which a terminal provides a Mission Critical Push To Talk (MCPTT)
service. The method includes receiving a group call announcement message by the …

A method for callback processing in telecommunication capability opening, a
telecommunication capability opening server, a client, and a telecommunication capability …

(57) ABSTRACT A method, server and terminal for providing a Voice Call Continuity (VCC)
service, are discussed. According to an embodiment, the terminal includes a storage unit to …

(57) ABSTRACT A method and terminal for controlling Voice Call Continuity (VCC) functions
initiated by a network, are discussed. According to an embodiment, the method includes …