Short PUCCH Format Design for 5G NR Uplink Control
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Solution Overview
Problem
Current communication systems, particularly in 5G NR, face limitations in flexibility and efficiency for short physical uplink control channel (PUCCH) designs, which affect the capacity, speed, and reliability of wireless communication, especially in scenarios requiring ultra-reliable low latency communications (URLLC) and massive machine-type communications (mMTC).
Innovation Solution
The design of multiple short PUCCH formats, including 1-symbol and 2-symbol formats, using CP-OFDM and DFT-S-OFDM waveforms, with flexible resource allocation and dynamic signaling to support various use cases, such as URLLC and mMTC, by configuring PUCCH resources and RS patterns to optimize multiplexing and diversity for efficient UCI transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single PUCCH format is used in current communication systems, then the system structure remains simple, but communication flexibility and efficiency are limited
Solution Approach 1:
The patent segments the PUCCH design into multiple distinct formats (Format 1, Format 2, Format 3, Format 4) with different characteristics. Each format is optimized for specific scenarios: Format 1 for coverage enhancement, Format 2 for capacity, Format 3 for flexibility, and Format 4 for low latency. This segmentation allows the system to select the appropriate format based on traffic requirements, thereby improving communication flexibility without requiring a single complex format to handle all cases.
Solution Approach 2:
The patent introduces dynamic PUCCH format selection mechanisms where the appropriate format is chosen based on real-time traffic conditions, channel quality, and service requirements. The network can dynamically configure and switch between different PUCCH formats to adapt to varying communication demands, enabling the system to optimize performance for different scenarios such as URLLC, mMTC, and conventional traffic while maintaining manageable complexity through standardized format definitions.
2Productivity
If multiple PUCCH formats with flexible resource allocation are implemented, then communication efficiency and reliability improve, but system complexity increases
Solution Approach 1:
The patent employs parameter changes by defining distinct formats with different key parameters such as resource allocation patterns, modulation schemes, coding rates, and transmission timing. For example, Format 1 uses specific resource allocation patterns optimized for coverage, while Format 2 uses different patterns for capacity. The network can adjust these parameters dynamically based on traffic conditions, improving communication efficiency while managing complexity through standardized parameter sets for each format.
Solution Approach 2:
Each PUCCH format is designed with local quality optimization for specific use cases. Format 3 and Format 4 are specifically designed with parameters optimized for URLLC scenarios requiring low latency and high reliability, while other formats are optimized for different scenarios. This local quality approach allows the system to achieve high efficiency for specific tasks without requiring all formats to be equally complex, as each format has its parameters tailored to its intended purpose.
3Reliability
If PUCCH resources are optimized for specific use cases like URLLC and mMTC, then reliability and latency performance improve, but the system loses generality
Solution Approach 1:
The patent achieves universality by designing a family of PUCCH formats where Format 3 and Format 4 can serve multiple functions: they are optimized for URLLC with specific parameters for low latency and high reliability, but can also be configured for other scenarios through network parameter adjustments. The same format structures can be adapted for different traffic types by changing configuration parameters, allowing the system to maintain generality while providing specialized optimization for specific use cases like URLLC and mMTC.
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 multiple sets of physical uplink control channel (PUCCH) resources, the multiple sets of PUCCH resources including at least a short PUCCH resource. The instructions are also executable to select a PUCCH resource from the sets of PUCCH resources. The instructions are further executable to transmit uplink control information (UCI) on the selected PUCCH resource.