5G Packet Duplication Cell Group Configuration
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Solution Overview
Problem
Current configurations for packet duplication bearers in 5G wireless communication technologies face challenges in efficiently managing cell or cell group configurations for reliable data transmission in carrier aggregation and multi-connection scenarios, particularly in ensuring duplicate PDCP PDUs are transmitted effectively across different carriers.
Innovation Solution
The method involves providing cell or cell group configurations to User Equipment (UE) for logical channels associated with packet duplication bearers, where each cell or cell group configuration comprises two or more cells or cell groups, allowing for explicit configuration using identities, bitmaps, or logical channel lists to indicate cell group associations, ensuring reliable transmission across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicate PDCP PDUs are transmitted through different carriers using packet duplication, then reliability is improved, but device complexity increases due to multiple cell group configurations
Solution Approach 1:
The patent divides the cell configuration into multiple cell groups (first cell group and second cell group), where each cell group is associated with specific logical channels. This segmentation allows duplicate PDCP PDUs to be transmitted through different carriers while maintaining organized management of multiple configurations, thus improving reliability without overwhelming device complexity.
Solution Approach 2:
The patent introduces a new dimension of organization by associating cell groups with logical channel identities rather than simply listing cells. This dimensional change in configuration management allows the system to handle multiple cell groups more efficiently, reducing the perceived complexity while maintaining the reliability benefits of multi-carrier transmission.
2Adaptability or versatility
If cell configurations are explicitly provided for each logical channel, then adaptability is improved, but configuration complexity increases
Solution Approach 1:
The patent creates a universal configuration mechanism where cell groups can be associated with multiple logical channels through a common association rule. Instead of providing separate explicit configurations for each logical channel, the system uses a universal cell group association that applies across different logical channels, thereby maintaining adaptability while reducing configuration complexity.
Solution Approach 2:
The patent uses copying by allowing the same cell group configuration to be associated with multiple logical channels. Rather than creating unique configurations for each logical channel, the system copies the cell group association across relevant logical channels, which simplifies the configuration process while maintaining the ability to adapt to different bearer requirements.
3Reliability
If multiple cell groups are configured for packet duplication bearers, then transmission reliability is improved, but information management complexity increases
Solution Approach 1:
The patent performs preliminary action by pre-establishing the association between cell groups and logical channel identities before data transmission. This pre-configuration allows the UE to automatically determine which cell group to use for each logical channel without requiring complex real-time decision-making, thereby maintaining transmission reliability while reducing information management complexity during operation.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously manage cell group associations based on pre-configured rules. The UE can independently determine the appropriate cell group for each logical channel using the association information provided by the network, without requiring continuous network intervention or complex coordination, thus reducing information management overhead while maintaining reliability.
Data Source
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Figure 3(a)~3(b)
AI summary
The present disclosure provides a method used in a base station. The method comprises: for logical channels or Radio Link Control (RLC) entities associated with packet duplication bearers, providing cell or cell group configurations to User Equipment (UE), where each cell or cell group configuration comprises two or more cells or cell groups.