Per Beam Waveform Selection for Wireless Communications
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in selecting waveforms for beamformed transmissions, as existing techniques do not effectively adapt to varying channel characteristics across different beams, leading to suboptimal data transmission performance.
Innovation Solution
Implementing a method where user equipment (UE) and base stations use different waveforms for different beams based on channel characteristics, such as OFDM and SC-FDM, to optimize data transmissions by configuring each beam with the most suitable waveform for its specific channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single waveform is used for all beams, then device complexity is reduced, but data transmission efficiency deteriorates due to inability to adapt to varying channel characteristics
Solution Approach 1:
The patent segments the beamformed communications into multiple beam groups, where each group is configured with a specific waveform type (OFDM or SC-FDM). This segmentation allows different waveforms to be applied to different beams based on their channel characteristics, thereby improving data transmission efficiency without requiring each individual beam to be independently configured, which would increase complexity excessively.
Solution Approach 2:
The patent applies local quality by configuring different waveform types (OFDM or SC-FDM) for different beam groups based on their specific channel characteristics. Each beam group receives a waveform that is locally optimized for its channel conditions (e.g., SC-FDM for frequency-selective fading channels, OFDM for flat fading channels), rather than applying a uniform waveform configuration across all beams.
2Productivity
If waveform selection is optimized for each beam based on channel characteristics, then data transmission efficiency is improved, but control signaling overhead increases
Solution Approach 1:
The patent merges multiple beams into beam groups, where each beam group is assigned a single waveform configuration. This merging reduces the control signaling overhead compared to configuring each beam individually, as the base station needs to transmit fewer waveform configuration parameters. The beam group concept allows the system to achieve adaptive waveform selection while minimizing the signaling burden.
3Adaptability or versatility
If different waveforms are used for different beams, then adaptability to channel characteristics is improved, but device complexity increases due to multiple waveform processing requirements
Solution Approach 1:
The patent implements dynamic waveform selection where the waveform type (OFDM or SC-FDM) is chosen based on the channel characteristics of each beam group. This dynamic approach allows the system to adapt to varying channel conditions (frequency-selective fading, flat fading, delay spread) while maintaining manageable complexity through the beam group abstraction, rather than requiring complex real-time waveform switching for each individual beam.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, control signaling configuring the UE to use a first waveform for communicating via a first beam and a second waveform for communicating via a second beam, the first waveform being different than the second waveform. The UE may communicate a first data transmission via the first beam using the first waveform and communicate a second data transmission via the second beam using the second waveform.