Uplink Transmission Handling for Misaligned Fixed Frame Periods
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Solution Overview
Problem
In wireless communication systems, scheduled uplink transmissions that are misaligned with a fixed frame period (FFP) can lead to inefficiencies and potential interference, as existing methods do not effectively handle such misalignments.
Innovation Solution
The proposed solution involves modifying or ignoring DCI indications for channel occupancy time (COT) acquisition based on the alignment with the FFP boundary, performing LBT procedures, and reconfiguring the FFP offset to align the transmission, thereby ensuring proper COT acquisition and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE follows the DCI indication to initiate COT acquisition, then the COT acquisition is initiated, but the uplink transmission may be misaligned with the FFP boundary causing interference
Solution Approach 1:
The patent applies parameter changes by modifying the FFP offset parameter to realign the FFP boundary with the scheduled uplink transmission time. This adjustment ensures that the transmission occurs at the correct boundary, eliminating interference while maintaining proper COT acquisition procedures.
Solution Approach 2:
The patent implements feedback mechanisms where the UE determines alignment status based on received indications and FFP boundary information, then adjusts its behavior accordingly. The UE feeds back its determination about alignment status to properly handle the COT acquisition indication, either following it or ignoring it based on the alignment state.
2Manufacturing precision
If the UE reconfigures the FFP offset to align the transmission, then the alignment is achieved, but the configuration complexity increases
Solution Approach 1:
The patent applies dynamics by making the FFP offset configurable and adjustable rather than fixed. This allows the system to adapt the offset dynamically based on alignment requirements, achieving precise alignment when needed while maintaining simplicity through flexible configuration rather than complex rigid structures.
3Object-affected harmful factors
If the UE ignores the DCI indication when misaligned, then interference is avoided, but the transmission efficiency decreases
Solution Approach 1:
The patent resolves this contradiction by changing the FFP offset parameter to realign the transmission with the FFP boundary. This allows the UE to follow the DCI indication and maintain transmission efficiency while avoiding interference, rather than having to ignore the indication and lose efficiency.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an uplink grant scheduling an uplink transmission that is not aligned with a fixed frame period (FFP) boundary configured for the UE. The UE may receive downlink control information (DCI) including an indication that the UE is to initiate a channel occupancy time (COT) acquisition in association with transmitting the uplink transmission. The UE may modify the indication based at least in part on the uplink transmission not being aligned with the FFP boundary and the indication indicating that the UE is to initiate the COT acquisition. The UE may transmit the uplink transmission based at least in part on the uplink grant and after the modification of the indication. Numerous other aspects are described.