Adaptive PDCP Duplication Using UE Feedback for Resource Efficiency
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing packet data convergence protocol (PDCP) duplication, as network entities may not adapt duplication settings based on the quantity of discarded packets, leading to resource waste and suboptimal performance.
Innovation Solution
User equipment (UE) monitors packet metrics and transmits feedback messages to network entities to adjust PDCP duplication settings, utilizing machine learning models to determine enabling, disabling, or modifying duplication based on packet error and latency metrics, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication is enabled to improve communication reliability, then packet delivery reliability is improved, but resource consumption increases due to duplicate packet transmission
Solution Approach 1:
The patent implements dynamic PDCP duplication by allowing the UE to autonomously adjust duplication configuration based on monitored packet metrics. The duplication state transitions from static network-configured to dynamic UE-controlled, enabling adaptation to changing channel conditions and traffic patterns, thus optimizing the balance between reliability and resource consumption.
Solution Approach 2:
The patent introduces a feedback mechanism where the UE monitors packet metrics (error rate, latency, discard rate) and uses this information to adjust PDCP duplication configuration. The feedback loop enables the system to respond to actual communication conditions, reducing duplication when conditions are good and increasing it when conditions deteriorate, thereby optimizing resource usage while maintaining reliability.
2Reliability
If PDCP duplication is configured to enhance packet delivery, then communication reliability is improved, but network resource waste increases due to unnecessary duplicate transmissions
Solution Approach 1:
The patent enables the UE to autonomously manage PDCP duplication without continuous network intervention. The UE self-monitors communication quality metrics and self-adjusts duplication configuration, eliminating the need for network entities to waste resources managing duplication for packets that don't require it. This self-service approach optimizes resource allocation by applying duplication only where and when needed.
Solution Approach 2:
The patent changes the parameter control mechanism from fixed network-configured duplication to dynamic UE-controlled duplication based on monitored metrics. The duplication configuration parameters (enabled/disabled, number of duplicates) are adjusted based on actual communication conditions, reducing network resource waste by eliminating unnecessary duplicate transmissions when channel conditions are good.
3Productivity
If adaptive PDCP duplication is implemented to optimize resource usage, then resource efficiency is improved, but system complexity increases due to UE monitoring and control functions
Solution Approach 1:
The patent extracts the PDCP duplication control function from the network entity and relocates it to the UE. This extraction simplifies the network side while adding monitoring and control capabilities to the UE, which is better positioned to observe local communication conditions. The complexity is shifted to where the most relevant information is available, improving resource efficiency while managing system complexity.
4Reliability
If PDCP duplication is maintained to ensure reliable delivery, then communication reliability is improved, but latency increases due to duplicate packet processing
Solution Approach 1:
The patent implements dynamic adjustment of PDCP duplication to respond to changing communication conditions. When channel conditions are good and latency is low, duplication is reduced or disabled. When conditions deteriorate, duplication is increased to maintain reliability. This dynamic approach optimizes the trade-off between reliability and latency by applying duplication adaptively rather than statically.
Solution Approach 2:
The patent changes duplication parameters based on monitored latency metrics. The UE monitors latency associated with packet delivery and adjusts duplication configuration accordingly, reducing duplication when latency is acceptable and increasing it when latency increases, thereby optimizing the balance between delivery reliability and latency performance.
Data Source
AI summary
Aspects of adaptive packet data convergence protocol duplication are described. In some examples, a user equipment (UE) may establish one or more communication links with a network entity, and each communication link may include a respective bearer. The UE may communicate, with the network entity, a first plurality of packets via the one or more communication links. The UE may monitor one or more metrics associated with the first plurality of packets. The UE may transmit, to the network entity, a message associated with configuration of PDCP duplication on the respective bearers of one or more of a second plurality of packets to be communicated via the one or more communication links.