Serving Node IMS Voice Domain Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring correct transmission of terminating voice calls, particularly in IMS networks, due to inadequate consideration of 'Voice over IMS' related capability information, leading to incorrect domain selection and potential voice call failures.
Innovation Solution
The method involves the serving node determining the 'Homogeneous Support of IMS Voice Over PS Sessions' information by considering 'Voice over IMS' related capability information of the UE, using Voice Support Match Indicator and SRVCC capability, to accurately select the domain for terminating voice calls, thereby ensuring correct domain selection and successful voice call transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the serving node does not evaluate 'Voice over IMS' related capability information, then the domain selection process is simplified and faster, but the terminating voice call may be routed to an incorrect domain leading to call failure
Solution Approach 1:
The serving node performs preliminary evaluation of 'Voice over IMS' related capability information (Voice Support Match Indicator and SRVCC capability) before domain selection. This advance assessment ensures that the correct domain is identified upfront, preventing routing errors and ensuring reliable voice call transmission without adding significant complexity to the overall process.
2Reliability
If the serving node evaluates 'Voice over IMS' related capability information, then correct domain selection is achieved, but the processing time and complexity increase
Solution Approach 1:
The capability information evaluation is performed in advance as a preliminary step before actual voice call routing. The serving node assesses Voice Support Match Indicator and SRVCC capability beforehand, so that when a voice call arrives, the domain selection can be made quickly based on pre-evaluated information, minimizing additional processing time.
Solution Approach 2:
The serving node autonomously evaluates the 'Voice over IMS' related capability information using its own processing capabilities, without requiring external assistance or complex multi-node coordination. This self-service approach ensures accurate domain selection while keeping the processing time and system complexity within acceptable limits.
Data Source
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AI summary
An embodiment of the present invention relates to a method for supporting a voice service for a network terminal in a wireless communication system. The method includes transmitting an update location request (ULR) message to a home subscriber server (HSS) by a serving node, wherein if the serving node may not evaluate an IP multimedia subsystem (IMS) voice over PS session-supported indication value for the terminal, the ULR has no information on homogeneous support of IMS voice in a PS session.