Cellular Uplink Waveform Switching with SINR and Power Headroom
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Solution Overview
Problem
Existing systems face inefficiencies in switching between Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) and Direct Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms, leading to unnecessary switching and suboptimal use of available transmission power in cellular networks.
Innovation Solution
A mechanism that dynamically switches between CP-OFDM and DFT-s-OFDM waveforms based on uplink signal-to-noise ratio (SINR) and power headroom, ensuring efficient use of transmission power by selecting the appropriate waveform and number of transmission ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If waveform switching is performed frequently to adapt to changing channel conditions, then system adaptability is improved, but device complexity and power consumption increase due to unnecessary switching
Solution Approach 1:
The patent implements dynamic waveform switching by continuously monitoring uplink SINR and power headroom conditions. The system transitions from static waveform selection to dynamic adaptation based on real-time channel conditions, allowing the waveform to change flexibly only when necessary while maintaining system adaptability.
Solution Approach 2:
The patent employs feedback mechanisms where the system monitors uplink SINR and power headroom conditions, then uses this feedback to intelligently determine when waveform switching is necessary. This feedback-driven approach prevents unnecessary switching by basing decisions on actual channel conditions rather than arbitrary timing.
2Reliability
If waveform switching is performed to optimize transmission performance, then transmission quality is improved, but power consumption increases due to frequent switching operations
Solution Approach 1:
The patent changes the decision parameters for waveform switching from simple threshold-based triggers to a composite evaluation of uplink SINR and power headroom conditions. This parameter change enables more intelligent switching decisions that optimize transmission quality while avoiding unnecessary switches that would consume additional power.
Solution Approach 2:
The system uses feedback from uplink SINR and power headroom measurements to control waveform switching. By continuously monitoring these parameters and only switching when conditions warrant it, the system maintains transmission quality while minimizing unnecessary power consumption associated with frequent switching operations.
3Power
If available transmission power is increased to support multiple transmission ports, then system performance is improved, but power efficiency decreases when waveforms are not optimally selected
Solution Approach 1:
The patent changes the waveform selection criteria to consider both uplink SINR and power headroom conditions. This parameter change enables the system to select waveforms that are optimal for the current channel conditions and available power, thereby improving power efficiency by avoiding the use of higher power configurations when they are not necessary for maintaining transmission quality.
Data Source
AI summary
Systems, methods, and computer-readable media are described herein to which dynamically provide an optimized mechanism for switching uplink waveforms within a cellular network. An uplink profile generally indicates the number of transmission ports and what uplink waveform is used by a user device to transmit to a base station. Power headroom, channel conditions and signal to interference plus noise are used to modify the uplink profile. These input may be compared to upper and lower threshold values to provide the optimal conditions to switch from a Cyclic Prefix Orthogonal Frequency Division Multiplexing waveform to a Direct Fourier Transform Spread Orthogonal Frequency Division Multiplexing waveform.