PUSCH Selection for UCI Multiplexing in 5G NR
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Solution Overview
Problem
The 5G New Radio (NR) system does not support simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH), and there is no effective method for selecting a proper PUSCH to carry uplink control information (UCI) in conventional art.
Innovation Solution
A method and apparatus for selecting a PUSCH satisfying specific conditions, such as priority orders, from multiple PUSCHs to multiplex and transmit UCI, including selecting a PUSCH with the same start symbol and time domain length as the PUCCH, or with a start symbol position not prior to the PUCCH, and prioritizing slot-based and grant-based PUSCHs, to improve UCI transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PUSCHs are available for UCI multiplexing, then transmission flexibility increases, but selection complexity increases and no effective solution exists
Solution Approach 1:
The patent applies parameter changes by establishing a priority mechanism based on multiple parameters including start symbol position, time domain length, and PUSCH type (slot-based vs non-slot-based). This transforms the complex selection problem into a structured parameter-based priority evaluation, where PUSCHs are ranked according to their parameter values against the PUCCH characteristics, resolving the selection complexity while maintaining transmission flexibility
Solution Approach 2:
The patent segments the PUSCH selection process into distinct evaluation stages: first identifying candidate PUSCHs that overlap with PUCCH in time domain, then applying priority rules to rank these candidates. This segmentation breaks down the complex selection task into manageable steps, reducing overall selection complexity while preserving the ability to flexibly handle multiple PUSCH scenarios
2Device complexity
If PUCCH and PUSCH simultaneous transmission is not supported, then system complexity is reduced, but UCI transmission reliability deteriorates when multiple PUSCHs are available
Solution Approach 1:
The patent applies preliminary action by pre-establishing priority rules and selection criteria before the actual UCI transmission occurs. The terminal device prepares a ranked list of candidate PUSCHs based on their parameters, ensuring that when UCI multiplexing is needed, the most suitable PUSCH can be quickly identified. This preliminary preparation enhances transmission reliability without adding real-time complexity to the transmission process itself
Data Source
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AI summary
A data transmission method and apparatus, a computer device and a storage medium are provided. The method includes that: a terminal device selects, from at least two physical uplink shared channels (PUSCHs) serving as selection objects, a PUSCH satisfying a preset condition; and the terminal device multiplexes first uplink control information (UCI) into the selected PUSCH for transmission. The solution of the disclosure can realize the reasonable selection of a PUSCH, etc.