PDCP Duplication Configuration for URLLC Reliability
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Solution Overview
Problem
Current solutions lack a configuration method for Packet Data Convergence Protocol (PDCP) duplication, which is essential for improving transmission reliability and reducing latency in Ultra-Reliable and Low Latency Communications (URLLC) services, particularly in New Radio (NR) systems.
Innovation Solution
A method and terminal device for configuring PDCP duplication, determining configuration information for PDCP duplication, and performing PDCP duplication configuration across multiple transmission branches using different radio access technologies like LTE and NR, to enhance communication validity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is implemented across multiple radio access technologies (LTE and NR), then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the configuration process into distinct components: determining configuration information, determining radio access technologies, and configuring PDCP duplication across multiple branches. This segmentation allows the system to manage complexity by handling each aspect separately while achieving reliable multi-technology duplication.
Solution Approach 2:
The patent implements dynamic configuration where the terminal device can adaptively determine configuration information and activate or deactivate duplication based on service attributes, logical channel priorities, and channel conditions. This dynamic approach allows the system to optimize reliability while managing device complexity through conditional activation rather than always-on duplication.
2Loss of time
If PDCP duplication is configured with multiple transmission branches, then transmission latency is reduced, but configuration complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal device determine configuration information and select radio access technologies in advance before actual data transmission. This pre-configuration enables rapid activation of duplication paths when needed, reducing transmission latency while managing configuration complexity through upfront decision-making.
Solution Approach 2:
The patent utilizes parameter changes by adjusting configuration information based on service attributes, logical channel priorities, and channel conditions. This allows the system to optimize transmission latency for different service types and conditions without requiring complex manual configuration, as parameters are adaptively changed based on real-time requirements.
3Reliability
If PDCP duplication is activated based on service attributes and channel conditions, then communication validity is improved, but processing overhead increases
Solution Approach 1:
The patent applies local quality by making duplication activation decisions based on specific service attributes and channel conditions rather than uniformly across all traffic. This allows the system to improve communication validity for critical services while avoiding unnecessary processing overhead for services that do not require duplication, thereby optimizing the trade-off between reliability and energy consumption.
Data Source
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AI summary
Embodiments of the present invention disclose a PDCP duplication configuration method and a terminal device, to perform PDCP duplication configuration. The method includes: determining, by a terminal device, configuration information of a sidelink SL PDCP duplication; and performing SL PDCP duplication configuration based on the configuration information, to implement PDCP duplication configuration.