NG-RAN IMS Voice Capability Matching for EPS or RAT Fallback
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Solution Overview
Problem
The Next Generation Radio Access Network (NG-RAN) fails to check the IMS voice-related capability of User Equipment (UE) and incorrectly informs the network about voice support, leading to potential mismatches and degraded user experience.
Innovation Solution
The NG-RAN checks the compatibility of UE capabilities with network configurations by supporting EPS or RAT fallback for IMS voice, ensuring seamless voice service continuity by redirecting the UE to compatible network nodes when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If NG-RAN does not check UE capability regarding IMS voice, then the system operation is simplified, but voice support matching accuracy deteriorates
Solution Approach 1:
The NG-RAN performs capability checking in advance before providing voice service. The network node checks UE capability and network configuration compatibility regarding IMS voice support beforehand, ensuring accurate voice support matching while maintaining simple operation during actual service delivery.
2Adaptability or versatility
If NG-RAN provides incorrect voice support information, then network configuration flexibility is maintained, but service reliability deteriorates
Solution Approach 1:
The NG-RAN implements a feedback mechanism where the result of capability checking is used to determine accurate voice support provision. The network node checks UE capability and network configuration, then provides voice support information based on the checking result, ensuring reliability while maintaining configuration flexibility through the conditional feedback loop.
Data Source
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AI summary
An embodiment of the present invention relates to a method for transmitting/receiving an IP multimedia subsystem (IMS) voice support-related signal by a next generation-radio access network (NG-RAN) in a wireless communication system, the method comprising the steps of: receiving, by the NG-RAN, a request associated with a UE capability for IMS voice from an AMF; checking, by the NG-RAN, whether the UE capability matches network configurations; and transmitting, by the NG-RAN, a response including the result of the check to the AMF, wherein the network configurations include a network configuration for the NG-RAN and a network configuration for a network node which enables IMS voice even when the NG-RAN does not support IMS voice.