T-mobile Usa, Inc.

Marc A Proctor

Nassereddine Sabeur

Joel Arends

Saqib Badar

Raymond Thomas Ball

Shujaur Rehman Mufti

Christopher Harvey Joul

Boris Antsev

Suresh Thanneeru

Khurram Ahmad Mirza

Subramania Kaushik

Systems and methods for establishing a communication interface between control functions of a network core and a network data node associated with a user side packet core are discussed herein. The system can enable configuration information to be stored and dynamically updated by the network data node such that control nodes of the user side packet core requesting service from the network core are provided with up to date configuration information associated with active control functions. As control functions are activated and deactivated, the configuration information can be updated to reflect the current state of the network core and ensure that user device connects are routed to active control functions configured to provide user requested services.

P-CSCF registration and discovery mechanism

In a telecommunication network, network slices can be identified by slice identifiers used within a core network. The same slice identifiers can also be used by elements of an IP Multimedia Subsystem (IMS) to identify the network slices. For example, a Home Subscriber Server (HSS) can be provisioned with user data associated with a user equipment (UE), including a slice identifier of a network slice that the UE is assigned to use. The HSS can provide the slice identifier to an S-CSCF in the IMS when the UE registers with the IMS. The S-CSCF can share the slice identifier with other IMS elements, such as a P-CSCF and/or one or more application servers. Accordingly, the IMS elements can determine key performance indicators (KPIs) and perform other operations in association with usage of network slices by UEs, based on the same slice identifiers used within the core network.

IMS slicing based on slice identifiers from HSS

When operational, a first node of an IMS network handles a registration of a UE on the IMS network, and receives a first request to reregister the UE with the IMS network. The first node creates a registration confirmation, and sends the registration confirmation to the UE. The second node of the IMS network receives a second request to reregister the UE with the IMS network and an indication that the first node has failed. The second node reduces IMS network congestion by avoiding reporting to the UE that the first node has failed, and by sending a message confirming reregistration. Upon receiving the message, the UE considers the registration valid for a predetermined period. Upon expiration of the predetermined period the UE sends a request to reregister. The message prevents the UE from congesting the IMS network.

Reducing IMS network congestion when a node in the IMS network becomes unavailable

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Shanwee, KS, United States of America

Marc A Proctor