Multi-Slot Sidelink Feedback Timing for High-Frequency PSFCH
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is currently no suitable solution for performing transmission and feedback of sidelink data in a sidelink communications system when extending the frequency band to high frequencies, such as above 52.6 GHz, due to the decrease in symbol duration with increasing frequency.
Innovation Solution
A sidelink transmission method involving the use of a first PSFCH in a first time unit to carry sidelink feedback information for one or more PSSCHs, where the time units can consist of consecutive M slots, with M being a positive integer greater than 1.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frequency band is extended to high frequency bands (above 52.6 GHz) to improve transmission rate, then the transmission rate is improved, but the symbol duration decreases making transmission and feedback difficult
Solution Approach 1:
The patent segments the time domain by introducing a time unit that includes multiple consecutive slots (M slots where M > 1), separating the feedback transmission from the data transmission in time. This allows the PSFCH to be transmitted in a dedicated time unit after the PSSCH, resolving the conflict between high transmission rate and adequate symbol duration for feedback.
Solution Approach 2:
The patent transitions from a single-slot based time structure to a multi-slot time unit structure, adding a temporal dimension that accommodates both data transmission and feedback transmission without interference. This dimensional change in time organization enables high frequency band operation while maintaining proper feedback mechanisms.
2Productivity
If the subcarrier spacing increases with frequency to improve transmission rate, then the transmission rate is improved, but the duration corresponding to one symbol decreases
Solution Approach 1:
The patent segments the transmission process into distinct phases: data transmission in the first slot and feedback transmission in subsequent slots within the same time unit. This segmentation allows the system to utilize larger subcarrier spacing for high transmission rate while ensuring adequate time for feedback through the extended time unit structure.
Solution Approach 2:
The patent performs preliminary action by establishing the time unit structure with multiple slots before actual transmission occurs. This pre-configured time structure ensures that when high frequency bands are used with large subcarrier spacing, the feedback mechanism is already prepared with sufficient time resources.
3Device complexity
If conventional single-slot transmission is used in high frequency bands, then the structure is simple, but there is no suitable solution for transmission and feedback
Solution Approach 1:
The patent segments the time domain into multiple slots within a time unit, creating distinct regions for data transmission and feedback transmission. This segmentation enables the system to maintain relative structural simplicity while introducing the necessary flexibility for high frequency band operation with proper feedback mechanisms.
Solution Approach 2:
The patent introduces dynamic adaptability by allowing the time unit to encompass M consecutive slots where M > 1, enabling the system to adapt to different transmission scenarios in high frequency bands while maintaining a unified and manageable structure.
Data Source
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.