Sidelink SCI Feedback for Reliable Adaptive Retransmission
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Solution Overview
Problem
The current LTE system's sidelink transmission has low reliability and efficiency due to the lack of feedback from receiving terminals, leading to potential data loss and reduced resource utilization.
Innovation Solution
Implementing a sidelink transmission method that includes physical layer feedback information through SCI, allowing terminals to perform adaptive transmission, beam matching, and retransmissions based on feedback, thereby improving transmission reliability and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broadcasting is used for sidelink transmission to ensure data transmission reliability, then transmission reliability is improved, but resource utilization rate and frequency efficiency are reduced
Solution Approach 1:
The patent introduces feedback mechanisms where receiving terminals send acknowledgment information back to transmitting terminals. This enables the transmitter to know whether data was successfully received and adjust transmission accordingly, replacing blind broadcasting with directed communication that improves both reliability and resource efficiency.
Solution Approach 2:
The patent implements dynamic transmission adaptation where the transmitting terminal adjusts its transmission behavior based on real-time feedback information. The system can dynamically select which terminals need retransmission and optimize resource allocation, transforming static broadcasting into dynamic adaptive transmission.
2Reliability
If multiple pieces of same data are broadcast to ensure transmission reliability, then data transmission reliability is improved, but frequency efficiency is reduced
Solution Approach 1:
Feedback acknowledgment information allows the transmitting terminal to identify which data pieces were successfully received and which require retransmission. This eliminates the need to broadcast multiple copies of the same data, as the system can target retransmissions only to terminals that actually need them, improving frequency efficiency.
Solution Approach 2:
The system discards redundant transmission attempts for data that was successfully received in the first place, and only recovers (retransmits) data that was actually lost. This selective approach based on feedback information reduces unnecessary frequency usage compared to broadcasting multiple copies of all data.
3Device complexity
If receiving terminal does not feed back information to transmitting terminal, then device complexity is reduced, but transmission reliability is reduced
Solution Approach 1:
The patent implements feedback mechanisms where receiving terminals send acknowledgment information back to transmitting terminals. This enables the transmitter to know whether data was successfully received and adjust transmission accordingly, replacing blind broadcasting with directed communication that improves both reliability and resource efficiency.
Data Source
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AI summary
Provided in an embodiment of the present disclosure are a sidelink transmission method and a terminal. The sidelink transmission method includes transmitting SCI through a PSCCH of a sidelink. The SCI includes an information field, and the information field is used to indicate physical layer information of the sidelink.