UE Assisted SCG Setup and Release in MR-DC
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE, face challenges in efficiently managing secondary cell groups (SCGs) for power saving and resource allocation, as the network lacks sufficient information to determine when to set up or release SCGs, leading to potential power consumption and performance issues.
Innovation Solution
User Equipment (UE) generates and signals UE assistance information (UAI) to indicate whether a secondary cell group should be setup or released, allowing the network to make informed decisions about SCG management in multiple radio dual connectivity (MR-DC) mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the network autonomously decides to setup or release SCGs without UE assistance information, then the network maintains full control over resource allocation, but the network lacks sufficient information to make optimal decisions leading to increased power consumption and potential performance issues
Solution Approach 1:
The patent implements a feedback mechanism where the UE monitors SCG usage and provides assistance information to the network. The UE sends UAI messages containing SCG usage indicators that feedback to the network entity, enabling the network to make informed decisions about SCG setup and release based on actual UE needs and conditions.
Solution Approach 2:
The UE autonomously monitors its own SCG usage patterns and generates assistance information without network intervention. The UE self-determines when SCG resources are needed or can be released, and communicates this self-generated information to the network to enable optimized resource management.
2Productivity
If the network continuously monitors UE conditions to make optimal SCG decisions, then network performance is optimized, but the device complexity and processing requirements increase
Solution Approach 1:
The UE performs self-monitoring of SCG usage conditions and autonomously generates assistance information messages. This shifts the monitoring burden from the network to the UE, simplifying network processing while maintaining optimized SCG management decisions based on real-time UE conditions.
Solution Approach 2:
The patent extracts the monitoring and information generation function from the network and places it at the UE side. The UE extracts and reports only essential SCG usage indicators to the network, reducing the complexity of network-side monitoring while maintaining management efficiency.
3Reliability
If the UE frequently signals SCG setup requests to the network, then the UE can maintain optimal performance, but the signaling overhead and network traffic increase
Solution Approach 1:
The UE signals SCG setup requests selectively based on monitored usage conditions rather than continuously. The UE provides partial information updates only when SCG usage conditions change or reach thresholds, reducing signaling overhead while maintaining reliable timing for SCG setup decisions.
Solution Approach 2:
The UE monitors and prepares SCG setup requests in advance based on predicted usage patterns. By detecting conditions that will require SCG setup before they occur, the UE can signal requests preliminarily, allowing the network to prepare resources in advance and reducing the need for urgent frequent signaling.
Data Source
AI summary
Certain aspects of the present disclosure provide a technique for a user equipment (UE) to signal UE assistance information (UAI) to setup or release a cell group (CG). For example, the technique may be executed to generate the UAI, which may indicate whether the CG such as a secondary cell group (SCG) should be setup or released for the UE when operating in a multiple radio dual connectivity (MR-DC) mode. The UE assistance information may be transmitted to a base station (BS).