Sidelink Shared COT Transmission for Initiating Terminal Targeting
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Solution Overview
Problem
There is currently no effective means for using shared Channel Occupancy Time (COT) transmission in the Sidelink-Unlicensed (Sidelink-U) scenario, which hinders efficient communication in unlicensed frequency bands.
Innovation Solution
A sidelink transmission method and apparatus that determines an initiating terminal for a shared COT as the target receiving terminal of a data packet in the logical channel prioritization (LCP) procedure, ensuring that the responding terminal uses the shared COT for sending data to the initiating terminal, thereby addressing the challenge of shared COT transmission in Sidelink-U scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal performs type-1 LBT to contend for COT for sharing with another terminal, then the responding terminal can use the shared COT for communication, but there is no effective means for determining the target receiving terminal in Sidelink-U scenario
Solution Approach 1:
The patent inverts the conventional LCP approach by having the responding terminal (user of shared COT) determine the initiating terminal (owner of shared COT) as the target receiving terminal, rather than the conventional approach where the transmitting terminal selects the receiving terminal based on its own transmission needs. This inversion resolves the technical contradiction by enabling shared COT transmission while maintaining clear terminal role identification.
Solution Approach 2:
The patent introduces shared COT indication information as an intermediary element that mediates the LCP procedure between the initiating terminal and responding terminal. This intermediary carries identification information that enables the responding terminal to correctly identify and select the initiating terminal as the target receiving terminal, thus resolving the ambiguity in Sidelink-U scenarios.
2Productivity
If the responding terminal uses the shared COT for sending data, then communication can be performed in unlicensed frequency band, but the target receiving terminal cannot be correctly identified without effective means
Solution Approach 1:
The patent applies preliminary action by having the initiating terminal pre-configure and indicate its identification information through shared COT indication information before the responding terminal uses the shared COT for data transmission. This preliminary preparation ensures that the responding terminal can correctly identify the initiating terminal as the target receiving terminal when utilizing the shared COT, preventing information loss.
Solution Approach 2:
The patent implements feedback mechanisms where the initiating terminal provides shared COT indication information to the responding terminal, enabling the responding terminal to correctly identify the target receiving terminal. This feedback loop ensures accurate terminal identification while maintaining efficient shared COT utilization for unlicensed band communication.
Data Source
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AI summary
Disclosed in the embodiments of the present application are a sidelink transmission method and an apparatus therefor. The method comprises: a first terminal determining the first terminal to be a response terminal; the first terminal determining, during a logical channel prioritization (LCP) process, a second terminal to be a target receiving terminal of a data packet, wherein the second terminal is an initiating terminal of a shared COT; and the first terminal sending the data packet to the second terminal by using the shared COT. By means of implementing the embodiments of the present application, performing LCP of a COT can be supported when a response terminal of a shared COT sends data to an initiating terminal, such that when the response terminal sends a data packet by using the shared COT, it can be ensured that a receiving terminal of the data packet is the initiating terminal of the shared COT, and the problem of how to use, in a Sidelink-U (sidelink-unlicensed) scenario, a shared COT for transmission is solved.