Sidelink Retransmission Feedback Resources for Half-Duplex Reliability
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Solution Overview
Problem
Existing wireless communication technologies lack an effective feedback retransmission mechanism for sidelink communication in half-duplex scenarios, leading to conflicts and reduced success rates of data transmission due to half-duplex interference.
Innovation Solution
A retransmission feedback method where terminals generate and transmit feedback information for each retransmission during the sidelink data process, using pre-configured or configured feedback resources to avoid conflicts and improve success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback retransmission is performed in half-duplex sidelink communication, then data transmission reliability is improved, but half-duplex interference causes feedback conflicts and reduces transmission success rate
Solution Approach 1:
The feedback resource is divided into multiple separate feedback resources corresponding to different data transmissions. Each feedback resource is independently allocated to avoid overlap and interference, allowing feedback information to be transmitted without conflict in half-duplex mode
Solution Approach 2:
The patent introduces time-domain resource allocation by configuring feedback resources in different time slots. This temporal dimension separation ensures that feedback transmission does not conflict with data transmission, resolving the half-duplex interference problem while maintaining reliability
2Reliability
If feedback resources are pre-configured for each retransmission, then feedback conflicts are avoided and success rate is improved, but resource allocation complexity increases
Solution Approach 1:
Feedback resources are pre-configured through higher-layer signaling before data transmission begins. This preliminary allocation establishes a clear mapping between data transmissions and feedback resources, eliminating the need for complex real-time resource allocation decisions and reducing operational complexity
Solution Approach 2:
The patent implements a feedback mechanism where the receiving terminal sends acknowledgment information on pre-configured resources. This structured feedback approach ensures reliable transmission confirmation while maintaining simple resource management through predetermined allocations
Data Source
AI summary
The present disclosure relates to a retransmission feedback method for sidelink communication, related to the technical field of communications. The method is executed by a first terminal. The method includes: generating feedback information for each retransmission during a retransmission process of sidelink data with a second terminal, the feedback information indicating whether the sidelink data is correctly received, the retransmission process comprising at least one retransmission; obtaining a feedback resource of each retransmission in the retransmission process; and transmitting the feedback information of each retransmission to the second terminal through a feedback resource of the corresponding retransmission.