PUSCH Waveform Switching for Multi-Cell Uplink Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in accommodating explosive data traffic, high transmission rates, and low latency while maintaining energy efficiency, particularly in managing PUSCH transmissions across multiple cells and dynamic grant scenarios.
Innovation Solution
A method and apparatus for dynamically switching or changing waveforms for configured grant (CG) and dynamic grant (DG) PUSCH transmissions, as well as in fallback DCI, based on the type of search space in which downlink control information is monitored, allowing independent waveform switching per cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed waveform is used for PUSCH transmission, then system complexity is reduced and compatibility is maintained, but transmission performance cannot be optimized for different scenarios
Solution Approach 1:
The patent implements dynamic waveform switching by introducing a transform precoding indication field in DCI format 0_1 that can dynamically enable or disable transform precoding for PUSCH transmission. This allows the waveform to adapt to different transmission scenarios (e.g., coverage enhancement, high data rate) while maintaining a relatively simple fixed waveform structure as the base, thus resolving the contradiction between adaptability and complexity
Solution Approach 2:
The patent changes the transform precoding parameter dynamically through DCI signaling. By introducing a 1-bit transform precoding indication field in DCI format 0_1, the system can switch between transform precoding enabled/disabled states based on channel conditions and traffic requirements, allowing waveform parameter adaptation without fundamentally changing the PUSCH structure
2Productivity
If waveform switching is implemented for all PUSCH transmissions, then transmission performance is optimized, but impact on existing operations increases
Solution Approach 1:
The patent segments the waveform switching application to specific scenarios rather than applying it universally. Transform precoding switching is primarily applied to dynamic grant PUSCH transmissions and configured grant PUSCH transmissions under specific conditions, while leaving other PUSCH transmissions unchanged. This selective segmentation minimizes impact on existing operations while optimizing performance where needed
Solution Approach 2:
The patent implements partial waveform switching by applying transform precoding dynamically only to specific PUSCH transmission types (dynamic grant and certain configured grant transmissions) rather than all PUSCH transmissions. This partial application achieves performance optimization in critical scenarios while minimizing disruption to existing operations that do not require waveform switching
3Productivity
If independent waveform switching is implemented per cell, then multi-cell transmission performance is optimized, but control complexity increases
Solution Approach 1:
The patent segments waveform control by cell, allowing independent transform precoding configuration for each cell in multi-cell scenarios. Each cell can have its own transform precoding indication in the DCI, enabling independent optimization per cell while maintaining a unified control structure through the existing DCI format, thus balancing performance optimization with control complexity
Data Source
AI summary
A method and a device for transmitting and receiving a PUSCH in a wireless communication system are disclosed. The method according to one embodiment of the present disclosure may comprise the steps of: receiving, from a base station, first configuration information related to a PUSCH, wherein the first configuration information includes first information about whether dynamic waveform switching for the PUSCH is supported; receiving, from the base station, a DCI scheduling the PUSCH; and transmitting the PUSCH to the base station.