Sidelink Transmission Mode Switching for HARQ Timing Constraints
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Solution Overview
Problem
In sidelink communication, the lack of knowledge of the actual transmission status by the control node leads to unreliable HARQ feedback-based transmission and blind retransmission, increasing processing complexity for the receiving user.
Innovation Solution
A method to determine a transmission manner based on whether the interval between transmission resources meets a target interval requirement, enabling HARQ feedback or non-HARQ feedback-based transmission to ensure proper resource utilization and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback-based transmission is used, then transmission reliability is improved, but resource allocation cannot ensure proper timing between transmission and feedback reception
Solution Approach 1:
The patent dynamically determines the transmission manner (HARQ feedback-based or non-HARQ feedback-based) based on whether the interval between transmission resources meets the target interval requirement. This dynamic adaptation allows the system to switch between transmission modes to ensure proper timing coordination while maintaining reliability.
Solution Approach 2:
The patent changes the transmission manner parameter based on the interval condition. When the interval between transmission resources meets the target requirement, HARQ feedback-based transmission is used; otherwise, non-HARQ feedback-based transmission is used. This parameter change resolves the contradiction between reliability and timing coordination.
2Ease of operation
If blind retransmission is used, then resource allocation simplicity is improved, but processing complexity of receiving user increases
Solution Approach 1:
The patent applies different transmission qualities locally based on resource interval conditions. For resource pairs meeting the target interval, HARQ feedback-based transmission with higher processing complexity is applied; for others, simpler non-HARQ feedback-based transmission is applied. This local differentiation resolves the contradiction between allocation simplicity and processing complexity.
3Adaptability or versatility
If mixed HARQ feedback-based transmission and blind retransmission are used, then adaptability is improved, but system reliability decreases
Solution Approach 1:
The patent dynamically selects the appropriate transmission manner based on real-time resource interval conditions. This dynamic selection ensures that HARQ feedback-based transmission (higher reliability) is used when timing conditions are met, while maintaining the adaptability to use non-HARQ feedback-based transmission when conditions are not met, thus resolving the contradiction between adaptability and reliability.
Data Source
AI summary
This application discloses a sidelink transmission method, a sidelink transmission apparatus, and a communication device, and pertains to the field of wireless communication technologies. The sidelink transmission method includes: determining a transmission manner based on whether an interval between two transmission resources or two transmission resource bundles meets a target interval requirement, where the transmission manner includes a HARQ feedback manner, and the transmission resource or the transmission resource bundle is a transmission resource or a transmission resource bundle provided in sidelink resource control signaling.