PUCCH Sequence Multiplexing Without DMRS for Priority UCI
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Solution Overview
Problem
Existing methods for improving uplink signal reception performance in mobile communication systems, particularly in high-frequency bands, face challenges in efficiently handling overlapping transmissions with different priority requirements and resource allocation inefficiencies, leading to degraded spectral efficiency and reception quality.
Innovation Solution
A method for multiplexing uplink control information (UCI) with different priorities in the same Physical Uplink Control Channel (PUCCH) resource without using a Demodulation Reference Signal (DMRS), by individually selecting sequences or combinations of sequences based on the information bit values, allowing for efficient resource allocation and reduced processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are used for uplink transmission, then demodulation accuracy is improved, but resource overhead and spectral efficiency deteriorate
Solution Approach 1:
The patent extracts and removes the demodulation reference signal (DMRS) from the uplink control channel transmission. By eliminating this redundant reference signal component, the system achieves coverage enhancement while reducing resource overhead. The terminal determines sequences directly from information bit values without requiring separate reference signals for demodulation.
Solution Approach 2:
The patent replaces expensive, resource-intensive reference signals with lightweight sequence-based modulation. The sequences are determined directly from information bits and transmitted without requiring separate reference signal resources, effectively using a simpler, more efficient representation that consumes fewer radio resources.
2Quantity of substance
If multiple sequences are used for different information bit values, then information transmission capacity is improved, but sequence selection complexity increases
Solution Approach 1:
The patent changes the parameter mapping approach by directly determining sequence indices from information bit values through simple mathematical operations. Instead of complex lookup tables or multi-stage selection processes, the system uses direct parameter mapping where information bits directly control sequence selection, reducing complexity while maintaining transmission capacity.
3Productivity
If information bits of different priorities are multiplexed in the same uplink resource, then resource utilization efficiency is improved, but reception performance deteriorates
Solution Approach 1:
The patent segments the uplink control information into different priority levels and assigns different sequence determination methods or sequence sets to each priority level. High-priority information uses one sequence determination approach while low-priority information uses another, allowing multiplexing in the same time-frequency resources while maintaining distinct reception performance characteristics for each priority level.
Data Source
AI summary
In an uplink transmission without using a reference signal, this terminal includes a control circuit that determines at least one series or at least one combination from a plurality of series or a plurality of combinations of series depending on a value of information bit, and a transmission circuit that multiplexes and transmits information bits of different priorities to an uplink resource using the at least one series or at least one combination.