Sidelink Resource Selection and Channel Access in Unlicensed Spectrum
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Solution Overview
Problem
Existing technologies face challenges in performing sidelink communication using an unlicensed spectrum, particularly in managing channel access and resource allocation to ensure efficient and reliable data transmission.
Innovation Solution
A method and apparatus for sidelink communication that allows a terminal to perform sidelink transmission in a first time-domain unit if granted transmission resources are available and channel access is successful, with conditions including the terminal being a destination receiver and using specific channel access types based on service types and network configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal determines a first uplink resource for transmitting a first data packet and a second uplink resource for transmitting a second data packet, then the terminal can transmit data packets through different uplink resources, but the terminal cannot determine whether to transmit the first data packet on the first uplink resource or on the second uplink resource
Solution Approach 1:
The terminal autonomously determines whether to transmit the first data packet on the first uplink resource or the second uplink resource based on pre-configured rules and current channel conditions, without requiring external network control. This self-service mechanism resolves the contradiction by enabling flexible resource selection while avoiding the complexity of centralized control mechanisms.
2Productivity
If the terminal transmits the first data packet on the first uplink resource, then the first data packet can be transmitted using the determined resource, but the first data packet cannot be cancelled
Solution Approach 1:
The terminal performs preliminary actions by determining cancellation conditions before transmission and proactively cancelling the first data packet transmission when these conditions are met, preventing resource waste and enabling adaptive resource utilization. This resolves the contradiction by maintaining transmission efficiency through pre-planned cancellation strategies while preserving adaptability.
Solution Approach 2:
The transmission decision is made dynamic rather than static, allowing the terminal to adjust transmission plans based on real-time channel conditions and pre-determined cancellation criteria. This dynamic approach enables both efficient transmission when conditions are favorable and flexible cancellation when conditions change, resolving the contradiction between productivity and adaptability.
3Adaptability or versatility
If the terminal determines cancellation conditions for the first data packet, then the terminal can cancel transmission under specific conditions, but the control signaling overhead increases
Solution Approach 1:
The patent extracts the cancellation decision-making function from the network side and places it on the terminal side, allowing the terminal to autonomously determine and execute cancellations based on pre-configured conditions. This extraction eliminates the need for extensive network control signaling, resolving the contradiction by maintaining cancellation adaptability while reducing signaling overhead.
Solution Approach 2:
The network pre-configures cancellation conditions and thresholds before data transmission begins, allowing the terminal to make autonomous cancellation decisions without real-time network intervention. This preliminary action reduces control signaling overhead while preserving the ability to cancel transmissions under specific conditions.
Data Source
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AI summary
The present application belongs to the field of sidelink communications. Disclosed are a sidelink transmission method and apparatus, and a device, a medium and a product. The method comprises: when transmission conditions are satisfied, a first terminal performing sidelink transmission on a first time-domain unit (902), wherein the transmission conditions comprise: the first terminal having a granted transmission resource on the first time-domain unit; and channel access executed by the first terminal before the first time-domain unit being successful.