SRVCC Switching Verification via Feedback Loop
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Solution Overview
Problem
Current technologies lack a method to effectively verify the capability of terminals to support SRVCC switching during voice calls when roaming from LTE to GSM/WCDMA networks.
Innovation Solution
A network switching processing method and apparatus that sends a switching message for SRVCC from a source network to a target network, detects a switching test success response message, and determines successful switching based on detection of specific messages and link confirmation from the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SRVCC switching is implemented from LTE to GSM/WCDMA network, then voice service continuity is ensured, but there is no method to verify the switching capability of terminals
Solution Approach 1:
The patent implements a feedback mechanism where the network sends a switching test success response message to the terminal after performing SRVCC switching. The terminal detects this message and sends an acknowledgment, creating a closed-loop verification system that confirms the terminal's switching capability without disrupting voice service continuity
Solution Approach 2:
The patent introduces an intermediary verification message (switching test success response message) that mediates between the network's switching action and the terminal's capability confirmation. This intermediary element enables indirect verification of terminal capability while maintaining the primary voice service function
2Reliability
If PS to CS switching is performed for voice bearing, then voice call continuity is maintained, but data services may be interrupted
Solution Approach 1:
The patent segments the bearing handling into separate treatments: voice bearing undergoes PS to CS switching for reliability, while data bearing maintains PS connectivity for continuity. This segmentation allows differential handling of different service types based on their specific requirements
Solution Approach 2:
The patent applies partial switching by selectively switching only the voice bearing to CS domain while leaving data bearing in PS domain. This partial action optimizes the system by applying switching only where necessary for voice continuity rather than forcing full switching that would disrupt data services
Data Source
AI summary
A network switching processing method and device, the method including sending a switching message of switching from multimode single frequency radio voice call continuity (SRVCC) of a source network to a target network, judging whether a switching test success response message sent by a terminal in the target network is detected, and in the case where the judgement result is yes, determining that the terminal is successfully switched from the SRVCC of the source network to the target network. The method and device solve the problem whereby the verification conducted on the capability for a terminal to support SRVCC switching cannot be realized, thus achieving the effect of conducting valid verification on the SRVCC switching of a terminal.