DSDA Mode Switching Component Carrier Management
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, devices using multiple subscriptions face inefficiencies when switching between dual subscription dual standby (DSDS) and dual subscription dual active (DSDA) modes, leading to resource overallocation and potential service interruptions due to the need for frequent radio capability updates and signaling with the network.
Innovation Solution
The method involves modifying the envelope mode by sending assistance information and channel quality indicator (CQI) values to manage the number of component carriers and MIMO layers, allowing devices to switch between DSDS and DSDA modes without violating maximum envelope modes, thereby reducing signaling and resource usage, and avoiding service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE switches from DSDS mode to DSDA mode to simultaneously communicate with multiple cells on both subscriptions, then communication availability and user experience are improved, but the number of component carriers may exceed the maximum envelope mode limit
Solution Approach 1:
The UE performs preliminary actions by transmitting assistance information to the network before actually switching to DSDA mode. This allows the network to pre-configure appropriate envelope modes for each subscription, preventing carrier overallocation issues before they occur.
Solution Approach 2:
The UE uses feedback mechanisms by transmitting assistance information and CQI values to the network, allowing the network to adjust the envelope mode configuration based on actual UE capabilities and communication needs, ensuring optimal resource allocation.
2Adaptability or versatility
If frequent radio capability updates are performed to support mode switching between DSDS and DSDA, then communication flexibility is improved, but signaling overhead and resource usage increase
Solution Approach 1:
The UE transmits assistance information in advance before mode switching occurs, allowing the network to pre-configure envelope modes. This eliminates the need for frequent post-switching capability updates, reducing signaling overhead while maintaining flexibility.
Solution Approach 2:
The patent introduces assistance information as an intermediary mechanism that carries envelope mode configuration details. This intermediary allows efficient mode switching without requiring full radio capability update procedures, reducing signaling burden.
3Productivity
If the UE allocates maximum component carriers for each subscription in DSDA mode, then communication performance is improved, but service interruptions occur due to resource overallocation
Solution Approach 1:
The patent implements dynamic envelope mode configuration where the UE can request different carrier allocations for different subscriptions based on actual needs. The network dynamically adjusts the number of component carriers per subscription to prevent overallocation while maintaining optimal performance.
Solution Approach 2:
The system changes the envelope mode parameter dynamically by transmitting assistance information that specifies desired carrier allocations. This allows the network to adjust resource distribution parameters in real-time, preventing service interruptions while maintaining communication performance.
4Productivity
If the UE transmits CQI values to request deactivation of component carriers, then resource allocation efficiency is improved, but signaling complexity increases
Solution Approach 1:
The patent makes the assistance information transmission mechanism universal by using it for multiple purposes: requesting envelope mode changes, indicating preferred carrier allocations, and providing feedback on communication quality. This multi-functionality reduces overall signaling complexity despite the added CQI value transmissions.
Data Source
AI summary
Aspects described herein relate to communicating with multiple cells based on two separate subscriptions stored at the UE in a dual subscription dual standby (DSDS) mode, switching to communicate with the multiple cells in a dual subscription dual active (DSDA) mode, transmitting, to at least one of the multiple cells and based on a number of component carriers allowed for a subscription being exceeded by switching to communicate in the DSDA mode, assistance information to indicate a threshold amount of component carriers for the UE, and transmitting, to at least one of the multiple cells and based on the number of component carriers allowed for the subscription being exceeded by switching to communicate in the DSDA mode, a channel quality indicator (CQI) value for one or more cells of the multiple cells to request deactivation of one or more component carriers with, or release of, the one or more cells.