MICO Mode Deactivation for Emergency Session Stability
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Solution Overview
Problem
The existing method of de-activating the Mobile Initiated Connection Only (MICO) mode in wireless communication systems requires explicit signaling interactions between user equipment (UE) and network devices, leading to increased system instability due to the high number of signaling interactions.
Innovation Solution
A connection control method and device that allows the UE or network device to locally de-activate the MICO mode after establishing an emergency service session connection, reducing the need for explicit signaling interactions and improving system stability by agreeing on the de-activation within the network or UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit signaling interactions are used to de-activate MICO mode between UE and network device, then the de-activation process can be completed reliably, but the number of signaling interactions increases and system stability deteriorates
Solution Approach 1:
The network device autonomously de-activates the MICO mode without requiring explicit signaling from the UE. The network device determines that the PDU session is for emergency services and automatically sends a registration reject message with de-registration type set to 'de-activate MICO mode', eliminating the need for UE-initiated registration update procedures.
Solution Approach 2:
The network device performs the MICO mode de-activation as part of the PDU session release process, before any potential subsequent communications. By proactively de-activating the MICO mode when releasing an emergency services PDU session, the network prevents future emergency communications from being blocked.
2Adaptability or versatility
If explicit signaling interactions are used to de-activate MICO mode, then the mode can be properly switched, but the complexity of signaling procedures increases
Solution Approach 1:
The MICO mode de-activation is merged with the existing PDU session release procedure. The network device combines the session release signaling with the MICO mode de-activation indication in a single registration reject message, eliminating the need for separate registration update procedures.
Solution Approach 2:
The registration reject message is extended to serve multiple functions: it both releases the PDU session and de-activates the MICO mode. The de-registration type field is used universally to indicate both session release and mode de-activation in a single signaling interaction.
3Reliability
If explicit signaling interactions are used to de-activate MICO mode, then proper mode management is achieved, but the time required for mode switching increases
Solution Approach 1:
The invention skips the intermediate registration update procedure that would normally be required for MICO mode de-activation. By directly indicating de-activation in the registration reject message during PDU session release, the process rushes through the mode switching in a single signaling step rather than multiple steps.
Data Source
AI summary
Embodiments of the present disclosure provide a connection control method and device. The method includes: establishing a session connection with a network device, where the session connection is for emergency service; de-activating a mobile initiated connection only (MICO) mode locally at the UE.