PDCP Duplication Dynamic Resource Allocation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in reducing latency and dynamically scheduling PDCP duplication procedures, which are essential for enhancing communication reliability and efficiency.
Innovation Solution
The proposed solution involves a method where user equipment (UE) and base stations can dynamically configure and manage uplink resources for PDCP protocol data units (PDUs), including selecting component carriers for transmission and retransmission based on physical layer feedback, power headroom, and latency specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication procedures are implemented to enhance communication reliability, then reliability is improved, but latency increases due to additional transmission procedures
Solution Approach 1:
The patent implements dynamic activation and deactivation of PDCP duplication based on real-time channel conditions and application requirements. The network can dynamically configure which RLC entities are active for duplication, allowing the system to adapt between single-path and multi-path transmission modes, thereby reducing latency when duplication is not needed while maintaining reliability when conditions warrant it.
Solution Approach 2:
The patent changes the parameter of duplication activation status dynamically. By controlling whether PDCP duplication is activated or deactivated based on channel quality, traffic type, and latency requirements, the system can adjust the level of redundancy provided, balancing reliability improvement against latency introduction.
2Productivity
If dynamic resource allocation for PDCP duplication is implemented, then productivity is improved through reduced latency, but device complexity increases due to additional configuration and management requirements
Solution Approach 1:
The patent establishes pre-configured uplink resources for PDCP duplication before actual data transmission begins. The network configures multiple RLC entities and their associated resources in advance, so that when duplication is needed, the data can immediately use the pre-prepared paths without requiring complex real-time resource allocation decisions, thereby reducing latency and simplifying runtime complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the network monitors channel conditions, transmission success, and latency metrics, then adjusts PDCP duplication configuration accordingly. This closed-loop control allows the system to automatically optimize duplication usage based on actual performance, improving productivity while managing device complexity through intelligent adaptation rather than exhaustive configuration.
3Reliability
If multiple component carriers are used for PDCP duplication transmission, then reliability is improved through diverse transmission paths, but loss of energy increases due to expanded resource usage
Solution Approach 1:
The patent applies different quality levels of duplication to different data flows or channels based on their specific requirements. Not all PDCP data requires the same level of redundancy - the system can apply duplication selectively to critical data while using single-path transmission for less critical data, thereby improving reliability where needed while minimizing energy consumption overall.
Solution Approach 2:
The patent implements partial duplication where only certain PDCP PDUs are duplicated rather than all data. The network can choose to duplicate only the most time-sensitive or critical data packets, providing enhanced reliability for important traffic while avoiding the energy cost of duplicating every packet, thus balancing reliability improvement against energy loss.
Data Source
AI summary
The present disclosure relates to methods and devices for wireless communication including an apparatus, e.g., a UE and/or a base station. In one aspect, the apparatus may transmit a list of a plurality of CCs for a transmission of at least one PDCP PDU, the plurality of CCs corresponding to a plurality of indicated CCs. The apparatus may also transmit the at least one PDCP PDU on one or more CCs of the plurality of CCs. Additionally, the apparatus may determine whether to retransmit the at least one PDCP PDU, a retransmission of the at least one PDCP PDU being associated with a PDCP duplication procedure. The apparatus may also select one or more CCs of the plurality of CCs for the retransmission of the at least one PDCP PDU.