Uplink Control Information Mapping in NR PUSCH
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Solution Overview
Problem
In the new radio (NR) wireless communications system, the variable transmission duration and multiple subcarrier spacings pose challenges for properly mapping uplink control information (UCI) to the physical uplink shared channel (PUSCH), affecting the reliable transmission of UCI.
Innovation Solution
The method involves determining a mapping-affecting factor, which includes various parameters such as subcarrier spacing, time and frequency domain positions, transmission latency, and processing latency, to effectively map UCI to the PUSCH, ensuring proper transmission by considering different mapping manners and resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UCI is embedded into PUSCH for transmission, then the terminal can transmit control information and data together, but the mapping of UCI to PUSCH becomes complex due to variable transmission duration and multiple subcarrier spacings in NR
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting mapping parameters such as start position and length of UCI within PUSCH based on different subcarrier spacings and transmission durations. The base station configures multiple mapping parameter sets corresponding to different PUCCH formats and subcarrier spacings, allowing the terminal to select appropriate parameters according to actual transmission conditions, thereby resolving the complexity of UCI mapping in variable numerology scenarios
Solution Approach 2:
The patent implements dynamics by making the UCI mapping configuration adaptive rather than fixed. The base station dynamically configures mapping parameters through RRC signaling based on detected PUCCH formats and subcarrier spacings, enabling the mapping scheme to flexibly adapt to different transmission scenarios. This dynamic configuration approach allows the system to handle variable transmission durations and multiple subcarrier spacings effectively
2Device complexity
If fixed PUCCH transmission duration and subcarrier spacing are used as in LTE-A, then mapping is simplified, but the system lacks flexibility to adapt to different transmission scenarios in NR
Solution Approach 1:
The patent applies universality by designing a unified mapping framework that works across multiple PUCCH formats and subcarrier spacings. The base station configures universal mapping parameter sets that can be applied to different scenarios (short PUCCH, long PUCCH, normal cyclic prefix, extended cyclic prefix) through parameter selection rather than separate mapping mechanisms. This universal approach maintains simplicity while achieving broad adaptability
Solution Approach 2:
The patent uses segmentation by dividing the mapping configuration into discrete parameter sets corresponding to different PUCCH formats and subcarrier spacings. Each parameter set contains specific start position and length values tailored to particular scenarios. The terminal segments the overall mapping problem into selecting the appropriate pre-configured parameter set based on the detected transmission conditions
Data Source
AI summary
This application provides an uplink control information sending method and apparatus and an uplink control information receiving method and apparatus. The sending method includes: determining a mapping-affecting factor, where the mapping-affecting factor is used to indicate a physical uplink shared channel (PUSCH) or uplink control information; mapping the uplink control information to the PUSCH based on the mapping-affecting factor; and sending the PUSCH to a base station.