Disclosed is a method for de-registering user equipment from a network in response to
notification that the user equipment will cease using network services. An Interruption …

Amethod for allowing a user equipment (UE) to detach from a network entity is provided. The
method includes detecting that the UE is not registered with the network entity while the UE …

A method and apparatus for maintaining service continuity for User Equipment accessing an
IP Multimedia Subsystem communication network. A routing identifier is established that …

Updates on access network capability are provided to an IP Multimedia System (IMS)
network. A User Equipment (UE) that is connected to the access network initiates a …

The present invention relates to a method for deregistration of a UE from an IMS, the
deregistration being initiated from and performed by a P-CSCF node. The present invention …

The present invention discloses user equipment, a home subscriber data server (HSS) and
a method and system for obtaining user equipment ability by a core network element …

The present disclosure proposes a method of setting an attach attempt counter value by a
network applicable under the circumstance when a UE attempts to attach to a network …

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 …

According to a first embodiment of the present invention there is provided a method of
operating a node of a commu nications network that is configured to provide an IP Multi …

A method for distributing network resource is disclosed. The method includes transmitting a
service request to a network for requesting that a connection be established between the …