PDCP Duplication Control via RLC Entity Status
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Solution Overview
Problem
Existing wireless communication systems lack detailed methods for implementing Packet Data Convergence Protocol (PDCP) duplication, which is essential for enhancing data transmission reliability in next-generation wireless communication systems.
Innovation Solution
The proposed solution involves a method for submitting PDCP PDUs to lower layers in wireless communication systems, specifically using a flowchart-based procedure that determines whether to operate in duplication mode or split bearer mode based on configuration and data volume considerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is implemented to increase data transmission reliability, then transmission reliability is improved, but device complexity increases due to multiple RLC entities and configuration management
Solution Approach 1:
The UE autonomously determines whether to activate PDCP duplication based on RLC entity status information without requiring explicit network configuration commands. The UE self-evaluates buffer status and RLC entity availability, then self-activates or deactivates duplication mode accordingly, reducing network-side configuration complexity while maintaining reliability improvements
Solution Approach 2:
The PDCP duplication function is designed to be dynamically activated or deactivated based on real-time RLC entity status. The system transitions between duplication mode and non-duplication mode according to buffer status and entity availability, allowing adaptive complexity management that scales with actual transmission needs rather than maintaining fixed high complexity
2Reliability
If PDCP duplication is activated to ensure data transmission through multiple paths, then transmission reliability is improved, but data transmission latency increases due to additional processing and routing steps
Solution Approach 1:
PDCP duplication is activated only partially - specifically when RLC entity status indicates available capacity and when buffer status thresholds are met. Rather than always duplicating data, the system applies duplication selectively to portions of data traffic that benefit most from redundancy, reducing overall processing latency while maintaining reliability for critical transmissions
Solution Approach 2:
The system performs preliminary evaluation of RLC entity status and buffer conditions before activating duplication. By pre-assessing whether duplication is necessary based on current system state, the patent avoids unnecessary duplication activation that would increase latency, while ensuring duplication is ready to activate quickly when reliability becomes critical
3Manufacturing precision
If detailed configuration procedures for PDCP duplication are provided, then implementation precision is improved, but ease of operation deteriorates due to complex configuration management
Solution Approach 1:
The UE performs self-configuration of PDCP duplication by autonomously determining activation conditions based on RLC entity status information. Instead of requiring detailed network-provided configuration parameters, the UE self-configures duplication behavior according to predefined status thresholds and buffer conditions, achieving precise implementation without complex configuration management
Solution Approach 2:
The patent changes the control parameter from detailed configuration parameters to simple status indicators (buffer status, RLC entity availability). By monitoring these parameters and automatically adjusting duplication activation accordingly, the system achieves precise control with minimal configuration overhead, improving ease of operation while maintaining implementation precision
Data Source
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AI summary
A method, performed by a User Equipment (UE) including a Packet Data Convergence Protocol (PDCP) entity associated with two Radio Link Control (RLC) entities and configured with a duplication function that is not activated, includes: determining, by the PDCP entity, whether the two RLC entities belong to a same cell group, and submitting, by the PDCP entity, a PDCP Data Protocol Data Unit (PDU) to a primary RLC entity of the two RLC entities when the two RLC entities belong to the same cell group.