RRC Connection Resumption With SCG Preference Signaling
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Solution Overview
Problem
Existing multi-USIM card devices face issues with network performance degradation due to unpredictable UE behavior when switching between networks, leading to potential data loss and resource wastage, as different manufacturers implement varying UE behaviors without standardization.
Innovation Solution
The user equipment (UE) transmits an RRC resume request message to a first network, indicating preference not to activate a secondary cell group (SCG) if it does not wish to do so, and resumes the RRC connection based on the network's response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network activates a secondary cell group (SCG) for the UE, then network resource utilization and data transmission efficiency are improved, but the UE may experience resource waste and data loss if it cannot receive or process the SCG activation due to switching between networks
Solution Approach 1:
The UE performs preliminary action by indicating its SCG activation preference (or lack thereof) to the network during the RRC resume procedure, before the network actually activates the SCG. This allows the network to make informed decisions about SCG activation based on UE capability and preference, preventing resource waste while maintaining efficient data transmission when appropriate.
2Adaptability or versatility
If the UE switches between different networks to handle multiple USIM cards, then multi-network connectivity and service diversity are improved, but the UE may fail to receive paging or scheduling from the current network
Solution Approach 1:
The UE provides feedback to the network about its SCG activation preference, which reflects its current network state and capability to handle additional cell groups. This feedback mechanism allows the network to adjust its activation decisions, ensuring reliable communication by avoiding SCG activation when the UE is engaged with another network, thus preventing data loss while maintaining multi-network connectivity.
3Extent of automation
If the network activates SCG without considering UE preference, then network resource allocation is simplified and automated, but the UE may be forced to activate SCG causing interference with its current network communication
Solution Approach 1:
The UE performs preliminary action by indicating its SCG activation preference to the network before the network makes its resource allocation decision. This maintains automation in the network's resource allocation process while incorporating UE feedback to prevent harmful interference with the UE's current network communication, thus resolving the contradiction between automation and interference prevention.
Data Source
AI summary
Provided in the present invention is an RRC connection resumption method performed by user equipment, including: transmitting, to a first network, an RRC resume request message requesting resumption of an RRC connection in the first network; receiving an RRC resume message from the first network; and when the RRC resume message indicates activation of a secondary cell group, if the user equipment prefers not to activate the secondary cell group, transmitting, to the first network, indication information indicating that the user equipment prefers not to activate the secondary cell group.