Wideband Precoding Timeline for SBFD Downlink Feedback
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces challenges in processing downlink messages with wideband precoding enabled in subband full-duplex (SBFD) scenarios due to insufficient processing time, especially when handling multiple downlink subbands, leading to inefficiencies and potential data loss.
Innovation Solution
The UE adjusts its processing time by receiving a control message indicating a wideband precoding configuration for multiple downlink subbands, allowing it to transmit feedback messages based on a modified timeline that accounts for the wideband precoding and grant scheduling, thereby relaxing the processing timeline for downlink shared channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE processes downlink messages with wideband precoding enabled across multiple downlink subbands in SBFD scenarios, then the data throughput and spectral efficiency are improved, but the processing time requirement increases beyond the standard timeline
Solution Approach 1:
The patent applies dynamics by making the processing timeline flexible rather than fixed. Specifically, it introduces a relaxed processing timeline for PDSCH in SBFD slots when wideband precoding is enabled, allowing the UE to adapt the feedback timing (K1 value) based on the wideband precoding configuration. This dynamic adjustment resolves the contradiction by enabling the system to maintain high productivity through wideband precoding while accommodating the increased processing time requirements through extended timeline configurations.
2Productivity
If the UE receives and processes downlink data across two or more downlink subbands within the same SBFD TTI, then the spectral efficiency and resource utilization are improved, but the complexity of processing and coordinating feedback timing increases
Solution Approach 1:
The patent applies local quality by differentiating the processing requirements for different subbands. When wideband precoding is enabled across multiple downlink subbands, the UE applies specific processing rules and relaxed timeline configurations only to those subbands affected by wideband precoding, rather than uniformly across all subbands. This localized approach reduces overall processing complexity by applying enhanced processing only where necessary while maintaining standard processing elsewhere.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a control message indicating a wideband precoding configuration for wideband precoding of two or more downlink subbands for subband full-duplex (SBFD) communication. The UE may receive grants scheduling a physical downlink shared channel (PDSCH) via two or more downlink subbands within an SBFD resource (e.g., a slot). Accordingly, the UE may receive downlink data via the two or more downlink subbands. The UE may process the downlink data and transmit, via a feedback (e.g., uplink) resource, a feedback message acknowledging the downlink data, where a time period between the SBFD resource and the feedback resource is based on the wideband precoding configuration and the grant scheduling the PDSCH via the two or more downlink subbands.