Sidelink Feedback Timing Across Multi-Slot Time Units
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Solution Overview
Problem
There is currently no suitable solution for performing transmission and feedback of sidelink data in high frequency bands, such as those above 52.6 GHz, due to the increase in subcarrier spacing and decrease in symbol duration.
Innovation Solution
The method involves transmitting and receiving sidelink feedback information using a first PSFCH in a time unit that consists of consecutive M slots, where M is a positive integer greater than 1, allowing for efficient sidelink data transmission and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency band is extended to high frequency band (higher than 52.6 GHz) to improve transmission rate, then transmission rate is improved, but symbol duration decreases making transmission and feedback difficult
Solution Approach 1:
The patent divides the time domain into multiple slots (M slots where M > 1) to segment the transmission process. Each slot contains a specific number of symbols, allowing the system to maintain manageable symbol durations while achieving high transmission rates through multi-slot aggregation. This segmentation resolves the contradiction by organizing the short-duration symbols into structured time units that facilitate reliable transmission and feedback.
2Productivity
If subcarrier spacing increases with frequency to improve transmission rate, then transmission rate is improved, but feedback transmission becomes challenging
Solution Approach 1:
The patent introduces dynamic feedback mechanisms where the feedback information is transmitted in subsequent slots following the data transmission. The system dynamically adjusts the feedback timing and structure based on the M-slot configuration, allowing feedback to be efficiently conveyed despite the high subcarrier spacing. This dynamic approach resolves the contradiction by adapting the feedback process to the high-frequency band characteristics.
3Productivity
If symbol duration decreases due to higher subcarrier spacing, then transmission rate is improved, but processing time for transmission and feedback is reduced
Solution Approach 1:
The patent ensures continuous useful action by aggregating M slots into a single time unit for both transmission and feedback operations. This continuity allows the system to maintain high transmission rates through short symbols while ensuring sufficient processing time is allocated within the aggregated slot structure. The continuous processing across multiple slots resolves the contradiction between speed and processing time requirements.
Data Source
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AI summary
Provided are a sidelink transmission method and a terminal device. The method comprises: a first terminal device receiving or sending a first PSFCH in a first time unit, wherein the first PSFCH is used for bearing first sidelink feedback information corresponding to one or more physical sidelink shared channels (PSSCHs) in a second time unit, and either of the first time unit and the second time unit comprises consecutive M time slots, M being a positive integer greater than 1. In the above technical solution, the transmission and feedback of sidelink data are performed on the basis of time units, and one time unit comprises a plurality of time slots, such that the transmission and feedback efficiency of the sidelink data can be effectively improved.