UE-Based PDCP Duplication Activation via Channel Thresholds
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing radio link control entities for Packet Data Convergence Protocol (PDCP) duplication, leading to increased signaling and resource overhead, particularly in dynamic radio conditions, which affects the quality of service for Ultra-Reliable and Low Latency (URLLC) services.
Innovation Solution
A unified user equipment (UE)-based approach that autonomously selects a subset of radio link control (RLC) entities for PDCP duplication by determining channel condition values and comparing them to threshold values, allowing for activation or deactivation of RLC entities to optimize communication based on measured parameters like pathloss, RSRP, and SINR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network-based approach is used for PDCP duplication activation, then control reliability is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The user equipment autonomously evaluates channel conditions and makes decisions about PDCP duplication activation without requiring continuous network control. The UE measures channel conditions, compares them against thresholds, and independently determines when to activate or deactivate duplication, thereby reducing signaling overhead while maintaining reliable control through local intelligence.
Solution Approach 2:
The system dynamically changes the operational state of PDCP duplication based on measured channel condition parameters such as pathloss, RSRP, and SINR. By monitoring these parameters and comparing them against predefined thresholds, the system adapts the duplication state to current network conditions, optimizing the balance between reliability and signaling overhead.
2Reliability
If PDCP duplication is activated for URLLC services, then service reliability is improved, but resource overhead increases
Solution Approach 1:
The system dynamically activates or deactivates PDCP duplication based on real-time channel condition measurements. Rather than maintaining duplication continuously, the system adapts its state according to current network conditions, ensuring URLLC service reliability is maintained only when needed while reducing resource overhead during normal conditions.
Solution Approach 2:
The system uses channel condition parameters (pathloss, RSRP, SINR) as triggers to dynamically change the duplication state. When parameters indicate poor channel conditions, duplication is activated to ensure reliability; when parameters indicate good conditions, duplication is deactivated to reduce resource consumption.
3Device complexity
If UE-based autonomous selection is implemented, then signaling overhead is reduced, but measurement and evaluation complexity increases
Solution Approach 1:
The user equipment performs autonomous evaluation of channel conditions using standard measurement procedures already built into the UE. By leveraging existing measurement capabilities and local decision-making logic, the system avoids the need for complex new measurement systems while still achieving autonomous control to reduce signaling overhead.
Data Source
AI summary
A process for execution by user equipment (UE) for activation or deactivation of a Radio Link Control (RLC) entity for Packet Data Convergence Protocol (PDCP) duplication includes identifying a set of RLC entities that are configured by a Radio Resource Control (RRC) for communication using PDCP. The process includes, for each RLC entity of the set of RLC entities: determining a network configured offset value; determining a channel condition value; and determining an RLC entity level value based on a combination of the network configured offset value and the channel condition value. The process includes comparing the RLC entity level value for each RLC entity to a threshold value; and based on comparing the RLC entity level value to the threshold value, selecting a subset of RLC entities for PDCP duplication; and activating or deactivating PDCP duplication for the selected subset of RLC entities.