PDCP Duplication Activation Across Multiple RLC Entities
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring and activating PDCP duplication and RLC entities to enhance communication reliability and efficiency, particularly in scenarios involving dual connectivity or carrier aggregation with more than two RLC entities.
Innovation Solution
User equipment and base stations are equipped with mechanisms to receive and transmit RRC messages that indicate activation configurations for PDCP duplication and RLC entities, using thresholds and secondary paths to manage data transmission based on cell groups and logical channels, optimizing data handling in scenarios with multiple RLC entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple RLC entities are configured for a bearer to enable more than two PDCP duplications, then the reliability of data transmission is improved, but the device complexity increases
Solution Approach 1:
The patent segments the RLC entities into different cell groups (first cell group and second cell group) with primary and secondary RLC entities. This segmentation allows the system to manage multiple RLC entities in an organized manner, enabling more than two PDCP duplications while maintaining manageable complexity through structured configuration.
Solution Approach 2:
The patent introduces dynamic activation and deactivation mechanisms for RLC entities based on data volume thresholds. The network can dynamically activate or deactivate the secondary RLC entity depending on whether the data volume exceeds the threshold, allowing the system to adapt the number of active RLC entities from static configuration to dynamic control, thus managing complexity while maintaining reliability.
2Reliability
If PDCP duplication is activated to improve data transmission reliability, then the reliability is improved, but the loss of energy increases due to duplicate transmissions
Solution Approach 1:
The patent applies partial action by enabling PDCP duplication only when necessary. The network determines whether to activate PDCP duplication based on data volume thresholds and transmission conditions. When the data volume is small or transmission conditions are poor, duplication is activated to improve reliability. When data volume is large and conditions are good, duplication is deactivated to avoid unnecessary energy consumption, thus achieving partial rather than complete duplication.
Solution Approach 2:
The patent changes the parameter of PDCP duplication activation status based on data volume and transmission conditions. The system dynamically adjusts the duplication parameter from active to inactive states, optimizing the balance between reliability improvement and energy consumption by parameter changes rather than fixed configuration.
3Device complexity
If data is transmitted using only the primary RLC entity to reduce complexity, then the device complexity is reduced, but the productivity of data transmission decreases when more RLC entities are available
Solution Approach 1:
The patent implements dynamic selection between primary and secondary RLC entities based on data volume thresholds. When the data volume exceeds the threshold, the system dynamically switches to using the secondary RLC entity, thereby utilizing multiple RLC entities for high-productivity transmission. When data volume is small, only the primary RLC entity is used to maintain low complexity, achieving dynamic adaptation between complexity and productivity.
Solution Approach 2:
The patent changes the operational parameter of RLC entity usage from single-entity mode to multi-entity mode based on data volume parameters. The system adjusts the number of active RLC entities from one to multiple depending on the data volume threshold, optimizing the balance between management complexity and transmission productivity through parameter-based decision making.
Data Source
AI summary
Provided in the present disclosure are user equipment and a method thereof, and a base station and a method thereof. A method performed by user equipment includes: receiving, from a base station, a medium access control control element (MAC CE) used to indicate an activation configuration of packet data convergence protocol (PDCP) duplication of a data radio bearer (DRB) and/or an associated radio link control (RLC) entity; and performing the activation configuration of the PDCP duplication and/or the associated RLC entity based on the MAC CE. Thus, the communication efficiency and reliability of a wireless communication system can be improved.