SCG Activation/Deactivation and Conditional PSCell Change Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3GPP radio interface technologies face challenges in efficiently managing SCG activation/deactivation and conditional PSCell changes due to complex and slow data rate monitoring, UE behavior signaling ambiguities, and excessive energy consumption in maintaining dual connectivity.
Innovation Solution
Implement methods for the UE to estimate dynamic data rate changes and provide assistance information to the network, allowing for faster SCG deactivation decisions and reduced energy consumption, while resolving signaling ambiguities through improved RRC messaging and relaxed measurements during SCG deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual connectivity is maintained to provide high data rate transfer, then user throughput is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic activation and deactivation of SCG and SCells based on real-time data rate requirements. The system transitions between active and dormant states, adjusting resource allocation dynamically rather than maintaining static dual connectivity, thereby reducing energy consumption when high throughput is not required while preserving the capability to quickly restore when needed.
Solution Approach 2:
The system changes operational parameters by activating or deactivating specific cell groups and secondary cells based on monitored data rate requirements. This parameter switching allows the network to adapt between different connectivity modes (full dual connectivity vs. reduced connectivity) to optimize the trade-off between throughput and energy consumption.
2Use of energy by moving object
If SCG deactivation is implemented to save energy, then energy consumption is reduced, but data rate monitoring complexity increases
Solution Approach 1:
The system performs preliminary actions by configuring activation/deactivation criteria and thresholds in advance. Data rate monitoring is set up with pre-defined rules and triggers, so when deactivation conditions are met, the system can quickly execute the transition without complex real-time decision-making, thereby reducing operational complexity while maintaining energy efficiency.
3Productivity
If UE provides assistance information for SCG management, then network decision-making is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential assistance information needed for SCG management decisions from the UE, rather than transmitting complete UE state information. This selective extraction provides the network with sufficient data for informed decisions while minimizing the volume of signaling messages exchanged, thus balancing decision-making improvement with overhead reduction.
4Reliability
If conditional PSCell change is implemented to improve mobility robustness, then connection reliability is improved, but signaling complexity increases
Solution Approach 1:
The system prepares conditional PSCell change configurations in advance, establishing pre-defined conditions and target cells before mobility events occur. This preliminary configuration reduces the complexity of real-time signaling during actual handovers, as the UE and network already have agreed-upon procedures and parameters ready for execution when conditions are met.
Data Source
AI summary
Methods, apparatus, and systems are described for assistance information from the UE to network side, e.g., enabling faster decision-making for secondary cell group deactivation in 3GPP MR DC/CA deployments. According to some aspects, instructions for UE behavior upon MR DC/CA secondary cell group activation are provided in a secondary cell group deactivation message to reduce delays for a UE triggered secondary group activation. RRC signaling ambiguities for conditional PSCell addition/change may be resolved by a synchronization message between a main node and a secondary node to avoid delays and signaling errors.