Terminal Power Scaling for Overlapping PUCCH Signals
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Solution Overview
Problem
Current 5G new radio (NR) technologies do not adequately address radio resource control for multiple UCI transmissions simultaneously via PUCCHs, particularly in scenarios where the sum of transmission powers for signals with different latency and reliability requirements exceeds the maximum transmission power, leading to potential quality degradation and ambiguity in detection.
Innovation Solution
A terminal and communication method that implement power scaling, prioritizing the quality of signals requiring lower latency and higher reliability, to manage transmission power within the maximum limit during overlap intervals, ensuring efficient transmission of multiple UCIs by allocating different PUCCH resources and applying power scaling only to signals that exceed the maximum power threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple UCIs are transmitted simultaneously via PUCCHs, then communication service diversification is achieved, but transmission power exceeds maximum limit causing quality degradation
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on signal priority and overlap conditions. When PUCCHs overlap, the system changes power allocation parameters to prioritize critical signals (UCI 2) over non-critical signals (UCI 1), ensuring maximum transmission quality for time-sensitive data while maintaining overall system adaptability for diverse services
2Reliability
If transmission power is increased for all signals, then signal quality is improved, but maximum transmission power limit is exceeded
Solution Approach 1:
The patent applies differentiated power allocation where different PUCCH signals receive different power levels based on their specific requirements. Critical signals with tight timing requirements (UCI 2) receive higher power priority, while non-critical signals (UCI 1) receive reduced power when overlaps occur, achieving local optimization of signal quality without exceeding total power limits
3Power
If power scaling is applied to all PUCCH signals, then power limit compliance is achieved, but latency and reliability of critical signals deteriorate
Solution Approach 1:
The patent segments PUCCH signals into priority groups (UCI 1 for non-critical, UCI 2 for critical time-sensitive data) and applies differential power scaling. This segmentation ensures that power reduction is selectively applied only to non-critical signals during overlaps, while critical signals maintain full power transmission, thus complying with power limits without compromising latency requirements
4Productivity
If simultaneous PUCCH transmissions are supported, then communication efficiency is improved, but detection ambiguity increases
Solution Approach 1:
The patent implements dynamic power adjustment based on real-time overlap detection and signal priority assessment. By dynamically changing transmission power levels during overlap intervals rather than using static allocation, the system maintains distinct signal characteristics that reduce detection ambiguity while preserving the efficiency benefits of simultaneous transmissions
Data Source
AI summary
In a terminal, in a case where the sum of the transmission power for a first signal and the transmission power for a second signal that requires lower latency and higher reliability than the first signal exceeds the maximum transmission power in an overlap interval in which a transmission of the first signal and a transmission of the second signal occur at the same time, a control unit carries out power scaling with the quality of the second signal being prioritized over the quality of the first signal, in at least the overlap interval. A transmission unit transmits the first signal and the second signal obtained after the power scaling.