Dynamic Uplink Waveform Switching for Faster PUSCH Adaptation
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Solution Overview
Problem
The semi-static configuration of uplink waveforms via RRC signaling in existing communication systems leads to inflexible and delayed changes, limiting uplink coverage and affecting signal quality of physical uplink shared channel (PUSCH) transmissions.
Innovation Solution
A method for dynamically configuring uplink waveforms through real-time indication using first information sent by a network device, allowing terminals to adjust waveforms based on MAC CE, RRC signaling, or DCI signaling, reducing configuration time from tens of milliseconds to a few milliseconds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semi-static configuration via RRC signaling is used, then waveform configuration is stable and reliable, but the delay to change waveform is long and flexibility is poor
Solution Approach 1:
The patent introduces dynamic waveform switching capability that allows the terminal to change waveforms in real-time based on network conditions, transforming the previously static RRC configuration into a dynamic system. The terminal can switch between different waveforms (e.g., DFTS-OFDM and CP-OFDM) without requiring lengthy RRC reconfiguration procedures, thus resolving the contradiction between stability and responsiveness.
Solution Approach 2:
The patent enables the terminal to pre-configure multiple waveform options and maintain them in readiness state. When waveform switching is needed, the terminal can immediately activate a pre-configured waveform without waiting for new configuration parameters, reducing the time delay while maintaining configuration reliability through pre-validation of multiple waveform options.
2Device complexity
If semi-static configuration via RRC signaling is used, then configuration is simple and reliable, but adaptability to different scenarios is poor
Solution Approach 1:
The patent implements dynamic waveform selection where the terminal can adaptively choose between different waveforms based on real-time channel conditions, coverage requirements, and network instructions. This dynamic adaptability allows the system to handle diverse scenarios (e.g., coverage enhancement, normal coverage, different terminal capabilities) without increasing configuration complexity, as the adaptation occurs through runtime selection rather than complex pre-configuration.
Solution Approach 2:
The patent enables flexible parameter adjustment by allowing the terminal to change waveform parameters dynamically based on network conditions and requirements. The terminal can adjust waveform type, cyclic prefix length, and other parameters in response to changing scenarios while maintaining simple configuration procedures through network-guided selection and pre-configured parameter sets.
Data Source
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AI summary
The present disclosure relates to uplink waveform configuration methods and apparatuses, and a storage medium. One uplink waveform configuration method comprises: receiving first information sent by a network device, the first information being used for indicating a transmission waveform actually used by a terminal in physical uplink shared channel (PUSCH) transmission. The present disclosure can provide dynamic uplink waveform configuration for terminals.