5G NR Uplink Channel Multiplexing for Overlap Resolution
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Solution Overview
Problem
In 5G New Radio (NR), there is no clear scheme for performing uplink channel transmission when uplink channels overlap, leading to situations where some overlapped channels may not be used for transmission due to lack of available symbols.
Innovation Solution
A method for uplink channel transmission is provided, where a terminal and a base station process overlapping uplink channels based on a multiplexing rule to determine target channels for transmission or reception, and then determine whether to transmit or receive these channels, ensuring normal system transmission and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink channels (PUCCH and PUSCH) are transmitted simultaneously when they overlap in time domain, then transmission efficiency is improved, but system reliability deteriorates because simultaneous transmission is not supported and causes scheduling conflicts
Solution Approach 1:
The patent applies preliminary action by checking whether the first symbol of the earliest channel satisfies a predefined timeline before allowing UCI transfer from PUCCH to PUSCH. This advance verification prevents simultaneous transmission conflicts while maximizing transmission efficiency. The base station and terminal both perform this check in advance to ensure scheduling reliability.
2Reliability
If a clear transmission scheme is defined for overlapped uplink channels, then system reliability is improved, but some channels may not be used for transmission due to lack of available symbols
Solution Approach 1:
The patent changes the parameter of transmission determination by introducing a two-stage process: first determining candidate channels based on multiplexing rules, then checking symbol availability. This parameter change allows the system to identify which channels can be transmitted and which cannot, improving reliability while providing clear information about channel utilization status.
3Device complexity
If the terminal and base station have different knowledge about the final transmission channel, then device complexity increases, but transmission performance deteriorates due to inconsistent scheduling decisions
Solution Approach 1:
The patent implements feedback by requiring the base station to determine the same target uplink channels that the terminal will transmit. The base station uses the same multiplexing rules and symbol availability checks to arrive at consistent scheduling decisions. This feedback mechanism ensures both parties have the same knowledge about which channels will be transmitted, improving transmission performance while maintaining manageable complexity through standardized procedures.
Data Source
AI summary
Embodiments of the present application provide an uplink channel transmission method, a terminal, and a base station. When a plurality of uplink channels are overlapped with each other on a time domain, the method applied to the terminal comprises: first processing the plurality of uplink channels according to a channel-multiplexing transmission rule, determining a first target uplink channel to be transmitted, and then determining whether to transmit the first target uplink channel; or first determining, from the plurality of uplink channels, a candidate uplink channel capable of preforming transmission, then processing the candidate uplink channel according to the channel-multiplexing transmission rule, and determining a second target uplink channel to be transmitted. The embodiments of the present application ensure the normal transmission of a system.