PUSCH Waveform Switching Across Multiple BWPs
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Solution Overview
Problem
Existing wireless communication systems face challenges in dynamically switching between different PUSCH waveforms, such as CP-OFDM and DFT-s-OFDM, in carrier aggregation scenarios with high signaling overhead and delay, which disrupts service continuity and efficiency.
Innovation Solution
A mechanism is introduced to simultaneously switch waveforms across multiple bandwidth parts (BWPs) using a single signal, such as a MAC CE or DCI, reducing signaling overhead and delay, allowing dynamic updates based on RRC configurations and common TransformPrecoder settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional waveform switching method is used in carrier aggregation, then waveform switching can be achieved, but signaling overhead increases and delay increases
Solution Approach 1:
The patent merges the waveform switching control for multiple BWPs into a single MAC CE signal. Instead of sending separate switching signals for each BWP, the system uses one unified control element that simultaneously switches waveforms across all associated BWPs, thereby reducing signaling overhead and switching delay while maintaining adaptability.
Solution Approach 2:
The MAC CE signal serves multiple functions by simultaneously controlling waveform switching for all associated BWPs. This universal control mechanism allows a single signal to perform what would traditionally require multiple separate signals, reducing the overall signaling burden and enabling faster switching operations.
2Adaptability or versatility
If traditional waveform switching method is used in carrier aggregation, then waveform switching can be achieved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple waveform switching control signals into a single MAC CE. By merging the control functions for all associated BWPs into one signal element, the system reduces the total quantity of signaling bits required while maintaining the ability to switch waveforms across multiple carriers.
Solution Approach 2:
The MAC CE is designed as a universal control element that can simultaneously manage waveform switching for all associated BWPs. This multi-functional approach eliminates the need for separate control signals for each BWP, thereby reducing signaling overhead while preserving full waveform switching capability.
3Reliability
If waveform switching is performed frequently for UE movement, then service continuity can be maintained, but signaling overhead and delay increase
Solution Approach 1:
The patent merges frequent waveform switching operations into a single efficient MAC CE signal. When UE movement requires frequent waveform adjustments, the system can still perform these switches efficiently by using the consolidated control mechanism, reducing the complexity burden while maintaining service continuity.
Solution Approach 2:
The system establishes RRC configurations and common TransformPrecoder settings in advance, preparing the waveform switching mechanism before UE movement occurs. This preliminary setup enables faster response to movement events while reducing the need for complex real-time signaling, as the switching logic is already in place and can be activated through simpler MAC CE signals.
Data Source
AI summary
Embodiments of the present application are related to a method and apparatus of uplink transmission. An embodiment of the present application provides a user equipment (UE), including: a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to, with the transceiver: receive a radio resource control (RRC) configuration indicating a plurality of associated bandwidth parts (BWP) sof at least one cell: receive a signal at least indicating a waveform for physical uplink shared channel (PUSCH) in at least one BWP of the plurality of associated BWPs; and apply the waveform for PUSCH transmission in the plurality of associated BWPs in the case that the waveform is applicable for PUSCH.