VoNR Cell Redirection for Voice Call Quality in 5G Standalone Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G standalone networks, VoNR-capable user equipment (UE) may be served by 5G cells that do not support VoNR, leading to voice calls being redirected to 4G voice services, resulting in a suboptimal user experience due to the inferior performance of VoLTE compared to VoNR.
Innovation Solution
The system determines the availability of a nearby 5G cell that supports VoNR and transfers the UE's service to that cell, either through redirection or handover, ensuring VoNR calls are established, even if the initial cell does not support VoNR, thereby improving call quality and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a VoNR-capable UE is served by a 5G cell that does not support VoNR, then the UE can be connected to a 5G network, but the voice call quality deteriorates because the call is redirected to 4G voice services (VoLTE)
Solution Approach 1:
The system performs preliminary detection of VoNR capability at the cell level before establishing a voice call. When a UE attempts to place or receive a voice call, the network checks whether the serving cell supports VoNR in advance, and if not, proactively initiates cell transfer to a VoNR-capable cell before the call is established, thereby ensuring high-quality voice service from the outset.
Solution Approach 2:
The network introduces an intermediary cell transfer mechanism (redirection or handover) between the UE and the final voice service. When the current cell lacks VoNR support, the network acts as an intermediary to transfer the UE to a suitable VoNR-capable cell, ensuring that the UE ultimately connects to a cell that can provide high-quality voice services.
2Reliability
If the system implements cell transfer mechanisms (redirection or handover) to ensure VoNR calls, then voice call quality improves, but the system complexity increases due to additional cell availability detection and transfer coordination
Solution Approach 1:
The system implements feedback mechanisms where the network continuously monitors cell VoNR capability status and UE location. When a UE is served by a non-VoNR cell, the network receives feedback about the UE's voice call attempts and the availability of neighboring VoNR-capable cells, then dynamically adjusts by initiating cell transfers to ensure high-quality voice service.
3Reliability
If the system performs real-time detection of VoNR-capable cells and executes cell transfers, then the user experience improves, but the time required for call setup increases due to the additional detection and transfer steps
Solution Approach 1:
The system performs preliminary detection of VoNR capability at the cell level and maintains information about available VoNR-capable cells in advance. When a voice call is initiated, if the UE is already on a VoNR-capable cell, no additional detection or transfer is needed, thus minimizing call setup time while still ensuring high-quality voice service.
Data Source
AI summary
Solutions for providing a data traffic session include: while a voice over new radio (VoNR) capable user equipment (UE) is being served by a first cell that does not support VoNR, determining that a second cell that does support VoNR is available to serve the UE; transferring the UE to service by the second cell; and providing a VoNR call to the UE through the second cell. The transfer may comprise a redirection or a handover (based on whether the UE is already in a call). Some examples further include a trigger of: receiving a notification of an incoming voice call to the UE, receiving a notification of an outgoing voice call from the UE, and receiving a notification of a handover of a voice call for the UE.