PDCP Duplication Configuration by Packet Priority
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Solution Overview
Problem
Current PDCP duplication methods in 5G wireless communication lack flexibility and efficiency, as they configure PDCP duplication at a granularity of Radio Bearers (RBs), leading to unnecessary resource waste by duplicating all data packets without considering their priority levels, which can result in suboptimal transmission performance for packets with varying degrees of importance.
Innovation Solution
A method and device for determining and indicating PDCP duplication configuration based on priority levels of data packets, allowing for flexible configuration of PDCP duplication function for each data packet according to its priority level, transmission resources, and wireless link quality, using configuration information sent by the network and processed by user equipment (UE) and base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is configured at RB granularity for all data packets, then transmission reliability is improved, but transmission resource utilization efficiency deteriorates
Solution Approach 1:
The patent segments the RB-level PDCP duplication configuration into packet-level configuration by introducing priority level classification. Data packets are divided into different priority levels (e.g., high priority and low priority), and PDCP duplication is selectively applied based on priority. This segmentation allows the system to maintain reliability for important packets while avoiding unnecessary duplication for less important packets, thus resolving the contradiction between transmission reliability and resource efficiency.
Solution Approach 2:
The patent applies local quality by differentiating PDCP duplication application across different data packets within the same RB based on their priority levels. Instead of uniformly applying duplication to all packets (global quality), the system applies duplication locally to specific high-priority packets that require enhanced reliability, while leaving low-priority packets without duplication to conserve resources. This local differentiation resolves the contradiction by optimizing resource allocation at the packet level.
2Reliability
If PDCP duplication is activated for all packets in an RB, then data transmission reliability is improved, but resource waste increases
Solution Approach 1:
The patent applies partial action by selectively enabling PDCP duplication only for high-priority data packets rather than all packets in an RB. The system performs duplication partially - only where necessary for critical data - avoiding excessive action that would waste resources on non-critical packets. This partial application of duplication maintains reliability for important data while reducing resource waste.
3Ease of operation
If PDCP duplication is configured at RB granularity, then configuration simplicity is maintained, but configuration flexibility deteriorates
Solution Approach 1:
The patent segments the configuration approach from RB-level to packet-level by introducing priority-based classification. This segmentation enables flexible configuration where different packets within an RB can have different PDCP duplication settings based on their priority levels, thereby improving configuration flexibility while maintaining manageable complexity through systematic classification.
Solution Approach 2:
The patent changes the configuration parameter from a binary RB-level setting to a multi-level packet-level setting based on priority. By introducing priority levels as a new parameter dimension, the system transforms the configuration from simple but inflexible RB-level control to more flexible packet-level control, allowing adaptive configuration that responds to different data requirements.
Data Source
AI summary
PDCP duplication function determination and indication methods and devices, a base station, and a terminal. Said determination method comprises: receiving PDCP duplication function configuration information sent by a network, the PDCP duplication function configuration information being obtained by determining, when an RB is configured with a PDCP duplication function, and on the basis of the number of priority levels of data packets of the RB, whether the data packets associated with each priority level are configured with the PDCP duplication function; and determining, according to the PDCP duplication function configuration information, whether each data packet of the RB is configured with the PDCP duplication function. With the technical solution provided by the present invention, user equipment can be effectively and flexibly configured with a PDCP duplication function, improving the utilization efficiency of transmission resources.


