5G NR Multimedia Access via Security Gateway
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Solution Overview
Problem
Conventional 5G cellular networks lack solutions for handling voice phone calls and multimedia messages, requiring downgrading to 4G radio access technology for VoLTE, which interrupts concurrent data transfer, and Wi-Fi calling has limited geographic coverage and mobility issues.
Innovation Solution
A method and user equipment that enable accessing IMS and MMS over a 5G NR network via a security gateway, allowing multimedia phone calls and messages without downgrading to 4G, by routing traffic through a serving gateway and packet data network gateway within the cellular network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional 5G network is used for data transfer, then high-speed mobile data transfer is achieved, but voice phone calls and multimedia messages cannot be handled
Solution Approach 1:
The patent enables the 5G cellular network to handle multiple types of traffic (data, voice calls, and multimedia messages) through a unified architecture using the ePDG gateway. The network can route different traffic types through appropriate pathways - direct data transfer over 5G for high-speed communication, and IMS routing through ePDG for voice and multimedia services, eliminating the need for separate 4G networks for these functions.
Solution Approach 2:
The ePDG (evolved Packet Data Gateway) serves as an intermediary component that enables IMS and MMS subsystems to be accessed over the 5G cellular network. It acts as a bridge between the 5G data network and the IMS/MMS infrastructure, allowing voice calls and multimedia messages to be transmitted through the 5G network without requiring 4G RAT downgrades.
2Ease of operation
If downgrade to 4G RAT for VoLTE phone calls, then voice call capability is achieved, but concurrent data transfer is interrupted and speed is reduced
Solution Approach 1:
The patent segments different traffic types into separate handling pathways within the 5G network. Voice calls and multimedia messages are routed through the ePDG and IMS subsystems, while data transfer continues over the 5G data network. This segmentation allows concurrent operations - voice calls can be made without interrupting or downgrading data transfer sessions, as each traffic type follows its own optimized path.
3Ease of operation
If use Wi-Fi calling solution, then voice call capability is achieved, but geographic coverage is limited and mobility is restricted
Solution Approach 1:
The patent merges voice call functionality with the cellular network infrastructure by routing IMS traffic through the ePDG over the 5G network. This integration allows voice calls to be handled using the same wide-area cellular coverage as data transfer, eliminating the need to switch to Wi-Fi networks for calling. The unified architecture provides seamless coverage wherever 5G cellular service is available, both indoors and outdoors.
Data Source
AI summary
The invention provides method and associated user equipment for improving versatility of a cellular network in a network system. The network system may have a packet core which may include a security gateway for facilitating an unlicensed network to interwork with the packet core. The method may include: by a user equipment, accessing a multimedia subsystem via the security gateway over the cellular network, instead of the unlicensed network.