GI Slot Alignment with CP Slots for Waveform Switching
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Solution Overview
Problem
Current wireless communication systems face challenges in aligning slot boundaries between cyclic-prefix-based waveforms and guard-interval-based waveforms, limiting flexibility and efficiency in switching between these waveforms, which affects network performance due to misalignment of slot boundaries.
Innovation Solution
The method involves configuring a guard interval (GI) slot with an extra, truncated, or removed portion to align its boundary with a cyclic prefix (CP) slot, allowing for seamless switching between CP-based and GI-based waveforms by adjusting the GI slot structure to match the CP slot structure within a half subframe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slot boundaries between CP-based and GI-based waveforms are not aligned, then switching between waveform types is limited, but network flexibility and efficiency are reduced
Solution Approach 1:
The patent implements dynamic slot structure configuration where GI slots can be dynamically adjusted with extra, truncated, or removed portions to align with CP slot boundaries. This dynamic adjustment mechanism enables flexible switching between CP-based and GI-based waveforms while maintaining slot alignment, thereby improving both adaptability and network performance without compromise
2Ease of operation
If GI slot structure is adjusted to align with CP slot boundary, then switching between waveforms becomes seamless, but GI slot structure complexity increases
Solution Approach 1:
The GI slot is segmented into distinct portions: a regular portion and an extra/truncated/removed portion. This segmentation allows the GI slot to be configured in different modes (with extra portion, with truncated portion, or with removed portion) to align with CP slot boundaries, enabling seamless waveform switching while managing structural complexity through modular design
3Adaptability or versatility
If slot alignment is not implemented, then waveform switching is restricted, but inter-symbol interference increases
Solution Approach 1:
The patent introduces an intermediary configuration mechanism that adjusts GI slot portions to act as a bridge between CP-based and GI-based waveforms. By configuring the GI slot with extra, truncated, or removed portions, this intermediary structure enables proper alignment and seamless transitions between waveform types while preventing inter-symbol interference that would otherwise occur during waveform switching
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, a configuration of a cyclic prefix (CP) frame structure associated with a CP-based waveform and a guard interval (GI) frame structure associated with a GI-based waveform, wherein the CP frame structure includes multiple CP slots arranged in a half subframe, wherein the GI frame structure includes multiple GI slots arranged in the half subframe, and wherein a first GI slot is associated with one of an extra portion, a truncated portion, or a removed portion such that a boundary of the first GI slot aligns with a boundary of a first CP slot. The UE may transmit or receive a first message in the half subframe via the GI-based waveform using the first GI slot. Numerous other aspects are described.