PDCP Packet Duplication Configuration for Uplink Conflict Avoidance
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Solution Overview
Problem
Existing PDCP duplication methods in wireless communication systems face challenges in efficiently managing multiple copies to enhance data transmission reliability while minimizing resource consumption, particularly in scenarios involving dual connectivity and carrier aggregation.
Innovation Solution
A dynamic PDCP configuration mechanism that allows for UE-based and network-based activation/deactivation of PDCP duplication with multiple copies, utilizing threshold values, time windows, and RRC/MAC signaling to adapt to current wireless environments and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is configured for multiple TRPs with same K1 value, then reliability is improved through diverse transmission paths, but uplink scheduling conflicts occur due to simultaneous PUCCH resource collisions
Solution Approach 1:
The patent dynamically adjusts the K1 value for packet duplication based on the TRP index, making the parameter adaptive rather than static. This dynamic configuration allows the system to maintain diverse transmission paths for reliability while avoiding scheduling conflicts by differentiating timing resources per TRP.
Solution Approach 2:
The patent segments the uplink scheduling resources by assigning different K1 values to different TRPs. This segmentation divides the previously unified PUCCH resource pool into separate time slots for each TRP, eliminating collisions while preserving the redundancy benefits of packet duplication.
2Ease of manufacture
If same K1 value is used for multiple TRPs, then configuration simplicity is maintained, but PUCCH resource collisions occur leading to scheduling failures
Solution Approach 1:
The patent applies local quality by assigning different K1 values to different TRPs based on their specific characteristics or indices. This localized differentiation ensures that each TRP has its own dedicated time slot for PUCCH transmission, preventing collisions while maintaining overall system simplicity through a systematic assignment rule.
3Reliability
If dynamic K1 adjustment per TRP is implemented, then scheduling conflicts are avoided, but configuration complexity increases
Solution Approach 1:
The patent changes the K1 parameter dynamically based on the TRP index, using a deterministic relationship (K1 value = function of TRP index) to manage complexity. This parameter change approach resolves scheduling conflicts while keeping configuration management systematic and predictable, rather than requiring complex individualized settings for each TRP.
Data Source
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AI summary
This disclosure relates generally to wireless communications and, more particularly, to systems and methods for dynamic configuration of a packet duplication convergence protocol (PDCP) configuration. In one embodiment, a method performed by a communication device includes: receiving configuration information from a communication node; and determining, for a packet duplication protocol per data radio bearer, a number of copies or a logical path based on the configuration information.