PDCP Packet Duplication Activation in 5G Multi-Connection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing technologies face challenges in activating and deactivating the Packet Data Convergence Protocol (PDCP) packet duplication function and managing carrier activation/deactivation in multi-connection and carrier aggregation scenarios, which are essential for reliable 5G communication.
Innovation Solution
A method is provided for user equipment (UE) and base stations to determine and configure the activation/deactivation of the PDCP packet duplication function based on the state of cell groups, ensuring that the required conditions for activation are met, such as the presence of a primary cell or activated cells in multiple groups, and utilizing MAC control messages for activation and deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PDCP packet duplication function is activated in multi-connection scenarios, then the reliability of communication is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The patent implements dynamic activation and deactivation of the PDCP packet duplication function based on real-time cell group states. The system transitions from a static configuration to a dynamic control mechanism where the duplication function is activated only when appropriate cell groups are available, thereby improving reliability while avoiding unnecessary complexity when duplication is not needed.
Solution Approach 2:
The user equipment autonomously determines whether to activate the PDCP packet duplication function by evaluating the states of cell groups itself, without requiring continuous external control instructions. This self-service approach simplifies the control architecture by enabling the UE to make local decisions based on predefined criteria regarding cell group availability and activation conditions.
2Reliability
If the PDCP packet duplication function is activated, then the reliability of packet transmission is improved, but the loss of time for activation and deactivation increases
Solution Approach 1:
The system performs preliminary evaluation of cell group states to determine whether activation conditions are met before actually activating the PDCP packet duplication function. By pre-checking the availability of appropriate cell groups and predicting whether activation should occur, the system avoids unnecessary activation/deactivation cycles, thereby reducing time loss while maintaining reliable transmission when needed.
3Adaptability or versatility
If multiple cell groups are configured for PDCP packet duplication, then the adaptability of the system is improved, but the difficulty of detecting and measuring system state increases
Solution Approach 1:
The patent divides the system into distinct cell groups (first cell group and second cell group) with clearly defined roles and states. Each cell group is independently evaluated against specific activation conditions, which simplifies the detection and measurement process by breaking down the complex multi-cell configuration into manageable segments with explicit state criteria.
Data Source
AI summary
The present disclosure provides a method performed by user equipment (UE), comprising receiving a configuration message, from a base station, the configuration message comprising information of two or more cell groups configured for a Packet Data Convergence Protocol (PDCP) packet duplication function. The method further comprises determining, according to a state of each cell in the two or more cell groups, whether conditions required for activation of the PDCP packet duplication function are satisfied. The method further comprises activation of the PDCP packet duplication function when the required conditions are satisfied. In addition, the present disclosure further provides a method performed by a base station and corresponding user equipment and a corresponding base station.