RLC Entity Activation for PDCP Duplication in DC and CA
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Solution Overview
Problem
Existing communication technologies face challenges in maximizing resource utilization and reliability of data transmission in dual connectivity (DC) and carrier aggregation (CA) scenarios, where duplicated data is transmitted, as they do not effectively leverage the potential of multiple copies of packet data convergence protocol (PDCP) data packets.
Innovation Solution
A method and device that determine which radio link control (RLC) entities to activate for transmitting PDCP data based on resource scheduling and configuration information, allowing multiple copies of PDCP data packets to be mapped onto different physical carriers, thereby increasing resource utilization and reliability in both DC and CA scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicated PDCP data packets are transmitted through multiple RLC entities in DC and CA scenarios, then reliability of data transmission is improved, but resource utilization rate deteriorates due to inefficient management of multiple copies
Solution Approach 1:
The patent implements dynamic activation and deactivation of RLC entities based on real-time resource scheduling and configuration information. The network device can flexibly adjust which RLC entities are active for transmitting duplicated PDCP data packets, switching between different RLC entities according to channel conditions and resource availability, thereby optimizing both reliability and resource utilization
Solution Approach 2:
The patent changes the operational parameters of RLC entities by activating or deactivating them based on resource scheduling information. This parameter change allows the system to adapt the number of active transmission paths dynamically, improving resource utilization while maintaining the reliability benefits of duplication when needed
2Productivity
If multiple RLC entities are configured for each PDCP entity to transmit duplicated data, then resource utilization rate is improved, but device complexity increases due to additional configuration and management overhead
Solution Approach 1:
The patent introduces resource scheduling and configuration information as an intermediary mechanism that coordinates between the network device and terminal device. This intermediary carries activation/deactivation commands that simplify the management complexity by providing a standardized interface for controlling multiple RLC entities, reducing the burden on both ends while enabling efficient resource utilization
3Ease of operation
If activation/deactivation MAC CE is used to control RLC entities, then ease of operation is improved, but reliability deteriorates due to potential loss or misinterpretation of activation commands
Solution Approach 1:
The patent incorporates feedback mechanisms where the terminal device sends acknowledgments or status information back to the network device regarding the activation/deactivation of RLC entities. This feedback loop ensures that activation commands are properly received and executed, maintaining reliability while preserving the operational simplicity introduced by MAC CE control
Data Source
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AI summary
A duplicated data-based transmission method and related devices are provided, which are possible to increase a resource utilization rate and reliability of data transmission. The method is applicable to a scenario where there are duplicated data under both dual connectivity (DC) and carrier aggregation (CA). The method includes the following. A first communication device receives first information sent by a second communication device, where the first information is used for determining information of at least three radio link control (RLC) entities corresponding to a packet data convergence protocol (PDCP) entity.