Uplink Control Information Mapping Across Codewords at High Rank
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Solution Overview
Problem
Existing communication technologies face challenges in efficiently multiplexing uplink control information (UCI) across multiple codewords during uplink transmission, particularly when the transmission rank exceeds four layers.
Innovation Solution
A method and apparatus that map UCI to N codewords among M codewords for uplink transmission, where M is greater than or equal to 2 and N is less than or equal to M, using explicit or implicit signaling to determine the codewords and apply multiplexing rules for efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UCI is transmitted using traditional single-codeword methods, then transmission compatibility is maintained, but transmission efficiency deteriorates when transmission rank exceeds four layers
Solution Approach 1:
The patent segments UCI transmission across multiple codewords (first codeword and second codeword) instead of using a single codeword. When transmission rank exceeds four layers, UCI is multiplexed onto both codewords, allowing efficient utilization of available transmission resources while maintaining manageable complexity through structured segmentation rules
Solution Approach 2:
The patent transitions from single-dimensional (single codeword) UCI transmission to multi-dimensional (multiple codewords) transmission. By introducing the codeword dimension, the system can transmit UCI across multiple layers simultaneously, improving transmission efficiency for high-rank scenarios without proportionally increasing complexity through standardized multiplexing procedures
2Productivity
If UCI is mapped to multiple codewords, then transmission efficiency improves for high transmission ranks, but determination complexity increases
Solution Approach 1:
The patent establishes predetermined rules for determining which codewords carry UCI based on transmission rank thresholds. The terminal device can proactively determine codeword allocation before transmission based on known channel conditions and rank indicators, eliminating complex real-time decision-making and simplifying the determination process while maintaining high transmission efficiency
Solution Approach 2:
The network device provides feedback through downlink control information indicating the quantity of codewords and their identification. This feedback mechanism guides the terminal device in correctly identifying which codewords should carry UCI, reducing determination complexity through explicit network guidance rather than requiring complex terminal-side analysis
Data Source
AI summary
An uplink control information transmission method includes a terminal maps UCI to N codewords among M codewords used for uplink transmission to perform uplink transmission, where M is a positive integer greater than or equal to 2, and N is a positive integer less than or equal to M.