Sidelink Contention Window Reuse for NACK-Only and Blind Retransmissions
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Solution Overview
Problem
Terminal devices operating on unlicensed spectrum for sidelink (SL) communication face challenges in determining an appropriate contention window during the type 1 listen before talk (LBT) procedure.
Innovation Solution
The method involves determining the latest contention window used for the first transmission as the contention window for subsequent transmissions when the terminal device performs NACK-Only based transmissions and/or blind retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device uses traditional contention window determination methods for NACK-Only based transmission and blind retransmission, then the channel access procedure can be completed, but the determination process becomes complex and inefficient
Solution Approach 1:
The terminal device uses its own historical transmission information (latest contention window from first transmission) to automatically determine the current contention window without external intervention or complex calculations, enabling self-service determination that simplifies the process and improves efficiency
Solution Approach 2:
The contention window for NACK-Only based transmission and blind retransmission is determined in advance based on the latest contention window from the first transmission, preparing the parameter before the actual transmission occurs and avoiding complex real-time determination
Data Source
AI summary
A method and apparatus for determining a contention window, a device, and a storage medium, relating to the technical field of communications are provided. The method includes that: if transmission of a terminal device includes NACK-Only-based transmission and/or blind retransmission, the latest contention window used for first transmission is determined as a contention window used for the transmission of the terminal device (710). In sidelink communication, the latest contention window used for first transmission is determined as a contention window used for sidelink transmission of a terminal device, and the method for determining the contention window is designed for two transmission modes, i.e., NACK-Only-based transmission and blind retransmission.