A method and apparatus provide for attachment for restricted local operator services for an
apparatus, such as a user equipment. An attach procedure for the restricted local operator …

A system, apparatus and method to maintain continuity of a Voice over Long Term Evolution
(LTE)(VoLTE) call. The system includes a first user equipment (UE) configured to perform a …

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 …

Techniques and mechanisms for Fifth Generation (5G) system (5GS) failure detection
monitoring of an application or control function in a network for efficient restoration of service …

The invention relates to a method for enabling network resource prioritization of mobile
terminating services of a user in a network, whereby the network comprises an evolved …

Abstract A user equipment (“UE”) connected to a first network that performs methods
including receiving a page from the first network indicating an incoming voice call, when it is …

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 …

(57) ABSTRACT A selection server device may receive a first registration request and
determine that a user device is associated with a non-local call service control function …