Uplink PDCP Duplication Dynamic Parameter Switching
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Solution Overview
Problem
Current PDCP duplication methods in 5G wireless communication systems are inefficient in terms of resource utilization, particularly in uplink directions, as they require double the radio resources and increased power consumption, which is undesirable in networks with high traffic loads and battery-powered devices.
Innovation Solution
A method that allows user equipment (UE) to autonomously decide on dropping duplicated uplink packets based on lower-layer configuration and status, with dynamic switching of logical channel parameters to optimize resource usage and performance, enabling flexible activation and deactivation of PDCP duplication without explicit signaling from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is activated for uplink transmission, then reliability of data transmission is improved, but resource utilization deteriorates due to double radio resource consumption
Solution Approach 1:
The patent implements dynamic switching between duplication and non-duplication modes based on network conditions. The base station configures multiple logical channels with different parameters (priority, bandwidth, timing), and the system dynamically selects which channel to use for each packet transmission, transforming the static duplication approach into a dynamic resource allocation mechanism that adapts to current network state
Solution Approach 2:
The patent changes logical channel parameters (priority values, bandwidth allocations, timing advance values) based on network conditions and packet characteristics. By modifying these parameters dynamically, the system optimizes resource utilization while maintaining transmission reliability, allowing the same logical channel to serve different purposes under different conditions
2Reliability
If PDCP duplication is activated for uplink transmission, then transmission reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically activates or deactivates duplication based on network conditions and packet importance. Not all packets are transmitted with duplication - the system selectively applies duplication only when necessary, reducing overall power consumption while maintaining reliability for critical transmissions
Solution Approach 2:
The user equipment autonomously decides whether to apply duplication based on locally available information about network conditions and packet characteristics, without requiring continuous signaling from the base station. This self-service approach reduces signaling overhead and allows faster adaptation to changing conditions
3Measurement precision
If explicit signaling is used for activation/deactivation of PDCP duplication, then control precision is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the duplication control functionality from the base station and implements it locally at the user equipment. The UE uses pre-configured parameters and local decision-making to control duplication activation/deactivation, removing the need for continuous explicit signaling while maintaining precise control over duplication behavior
Solution Approach 2:
The base station pre-configures multiple logical channels with different parameters before transmission begins. This preliminary configuration allows the UE to make autonomous decisions during transmission without requiring real-time signaling, reducing overhead while maintaining control precision through pre-planned parameter sets
Data Source
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AI summary
There is provided an apparatus, said apparatus comprising means for causing at least one data packet to be transmitted by a user equipment using a first logical channel having a first set of logical channel parameters, and at least one data packet to be transmitted by the user equipment using a second logical channel having a second set of logical channel parameters, determining whether at least one trigger condition is met and, if so, causing the at least one data packet to be transmitted by the user equipment using the second logical channel with the modified second set of logical channel parameters.