Dynamic Uplink Waveform Selection Based on Resource Block Regions
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Solution Overview
Problem
Current wireless communication systems face challenges in finding an optimal waveform for all use cases, as existing waveforms are not suited for specific scenarios, leading to suboptimal performance in terms of power reduction and spectral efficiency.
Innovation Solution
An apparatus and method that dynamically determine a waveform for uplink transmissions based on resource block regions in the frequency domain, selecting between multiple waveforms such as CP-OFDM and DFT-s-OFDM, using thresholds for power headroom and modulation schemes to optimize power reduction and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single waveform is used for all uplink transmissions, then system complexity is reduced, but power reduction and spectral efficiency are suboptimal for specific scenarios
Solution Approach 1:
The patent implements dynamic waveform selection where the waveform type (CP-OFDM or DFT-s-OFDM) is determined based on real-time conditions such as frequency domain resource allocation patterns and power headroom levels. This dynamic adaptation allows the system to optimize power reduction and spectral efficiency for each transmission scenario while maintaining manageable complexity through predefined selection criteria.
2Reliability
If multiple waveforms are used for different scenarios, then power reduction and spectral efficiency are improved, but device complexity increases
Solution Approach 1:
The patent segments the frequency domain into different resource block regions and associates specific waveforms with specific regions. This segmentation approach simplifies the waveform selection process by providing clear rules: if resource blocks are allocated in certain regions, a specific waveform is selected. This structured segmentation reduces determination complexity while maintaining the benefits of scenario-specific waveform optimization.
Solution Approach 2:
The patent changes the waveform parameter (CP-OFDM or DFT-s-OFDM) based on specific conditions including frequency domain resource allocation patterns, power headroom thresholds, and modulation scheme requirements. By tying waveform selection to measurable parameters with predefined thresholds, the system achieves adaptive optimization without excessive complexity.
3Productivity
If waveform selection is based on multiple criteria (resource blocks, power headroom, modulation schemes), then performance optimization is improved, but determination complexity increases
Solution Approach 1:
The patent applies different waveform types to different local conditions within the frequency domain resource allocation. Specifically, CP-OFDM is selected for certain resource block regions while DFT-s-OFDM is selected for other regions, with the selection based on local characteristics such as allocated resource block positions and power headroom levels. This local quality approach optimizes performance for each specific transmission scenario.
Data Source
AI summary
To enable dynamic waveform switching, one or more instructions on how to determine a waveform amongst at least a first waveform and a second waveform for at least one uplink transmission based at least on frequency domain resource allocation for the at least one uplink transmission may be transmitted in a network, or apparatuses may comprise one or more of the one or more instructions. The one or more instructions associate at least resource block regions with waveforms. The one or more instructions may be applied to determine, based on a frequency domain resource allocation for an uplink transmission, a waveform for the uplink transmission at least according to a resource block region in the frequency domain resource allocation. The waveform determined is then used in the uplink transmission.