Handling data connection session in IMS network

By implementing on-demand IMS PDU session/PDN connections and configuring S50 and SBI interfaces, the method addresses the inefficiency of maintaining idle IMS connections, optimizing IP address usage and increasing network capacity.

WO2025100711A1 Publication Date: 2025-05-15SAMSUNG ELECTRONICS CO LTD
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Patent Information

Application Number
PCT/KR2024/013191
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-08
Filing Date
2024-09-02
Publication Date
2025-05-15

AI Technical Summary

Technical Problem

In IMS networks, existing technologies maintain IMS PDU session/PDN connections even when there is no data traffic, leading to inefficient use of IP addresses and increased resource utilization.

Method used

Implementing a method to establish IMS PDU sessions/PDN connections on demand for VoNR and VoLTE services and release them when not required, along with configuring S50 and SBI interfaces to manage UE IP addresses and context dynamically.

Benefits of technology

This approach allows for the reuse of IMS UE IP addresses across multiple subscribers, optimizing IP address usage and increasing the number of subscribers that can be supported by the core network with the same physical resources.

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Abstract

Methods for handling a data connection session in an Internet Protocol (IP) Multimedia Subsystem (IMS) network are provided. The method includes configuring a S50 interface between a Mobility Management Entity (MME) and a Policy and Charging Rules Function (PCRF) entity in the IMS network, and notifying a User Equipment (UE) about a Mobile Terminated (MT) Voice over LTE (VoLTE) call by using the MME. Another method includes configuring a SBI interface between an Access and Mobility Management Function (AMF) entity and the Policy Control Function (PCF) entity in the IMS network, and includes notifying a UE about a MT Voice over New Radio (VoNR) call by using the AMF entity.
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