Dynamic PUCCH Resource Configuration for 5G NR Payload Adaptation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face limitations in flexibility and efficiency for short physical uplink control channel (PUCCH) design, which affects the ability to effectively manage uplink control information transmission, especially in scenarios requiring high reliability and low latency.
Innovation Solution
The proposed solution involves configuring multiple sets of PUCCH resource configurations based on payload size, allowing for dynamic selection of the appropriate configuration for transmitting uplink control information, using either a 1-symbol or 2-symbol short PUCCH format with specific reference signal patterns and waveforms, such as CP-OFDM or DFT-S-OFDM, to optimize resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single PUCCH resource configuration is used, then the system complexity is low, but the flexibility and adaptability for different payload sizes are limited
Solution Approach 1:
The PUCCH resource configurations are segmented into multiple sets, where each set is tailored for specific payload size ranges. This segmentation allows the system to select the most appropriate configuration based on the actual payload size, thereby improving flexibility without requiring a single overly complex configuration to handle all cases.
Solution Approach 2:
The system dynamically selects among multiple PUCCH resource configuration sets based on the payload size of the uplink control information. This dynamic adaptation enables the system to optimize resource allocation for each transmission scenario, improving versatility while managing complexity through conditional selection rather than fixed universal configuration.
2Reliability
If longer PUCCH transmission duration is used, then the reliability improves, but the latency increases
Solution Approach 1:
The PUCCH transmission duration is made dynamic through the selection of different configuration sets. For URLLC scenarios requiring low latency, shorter duration configurations can be selected while maintaining adequate reliability through optimized resource allocation. For scenarios prioritizing reliability, longer duration configurations are available. This dynamic adaptation resolves the contradiction by allowing context-dependent optimization.
Solution Approach 2:
The system changes key transmission parameters including duration, waveform type, and resource allocation based on the selected PUCCH configuration set. By adjusting these parameters dynamically according to service requirements (e.g., eMBB versus URLLC), the system can optimize the trade-off between reliability and latency for different communication scenarios.
3Quantity of substance
If more PUCCH resources are allocated, then the capacity increases, but the resource allocation efficiency decreases
Solution Approach 1:
PUCCH resources are segmented into multiple configuration sets with different resource quantities and allocations. Each set is optimized for specific payload size ranges and service types. This segmentation allows the system to allocate appropriate resource capacity without over-provisioning, thereby maintaining high resource allocation efficiency while providing sufficient capacity when needed.
Solution Approach 2:
The system dynamically changes resource allocation parameters including the number of resource blocks, resource elements, and configuration set selection based on the actual uplink control information payload size. This parameter adaptation ensures that resources are allocated efficiently - providing sufficient capacity for large payloads while avoiding waste for small payloads, thus resolving the contradiction between capacity and efficiency.
Data Source
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AI summary
A user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to acquire a first higher layer configuration indicating at least a short uplink control channel (PUCCH) resource configuration. The instructions are also executable to acquire a second higher layer configuration indicating multiple sets of PUCCH resource configurations, one set of PUCCH resource configurations within the multiple sets of PUCCH resource configurations include the short PUCCH resource configuration. The instructions are further executable to select a set of PUCCH resource configurations from the sets of PUCCH resource configurations based on a payload size of uplink control information (UCI). The instructions are additionally executable to transmit the UCI on a PUCCH resource, the PUCCH resource corresponding to a PUCCH resource configuration within the selected set of PUCCH resource configurations.