HARQ Timer Segmentation for NR Unlicensed Data Transmission
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Solution Overview
Problem
In New Radio (NR) unlicensed spectrum, there is a challenge in balancing the initiation of new data transmissions and retransmissions, as existing mechanisms do not effectively manage when the network receives data correctly or incorrectly, leading to potential interference and inefficient resource utilization.
Innovation Solution
A data transmission method that utilizes two timers, a CG timer and a CG retransmission timer, to determine when to initiate new transmissions and retransmissions, ensuring that the HARQ process corresponding to a configured grant resource is available for data transmission, thereby preventing interference and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the CG resource is used to transmit new data without timer control, then data transmission efficiency is improved, but interference between new and retransmitted data occurs and resource utilization becomes inefficient
Solution Approach 1:
The patent segments the HARQ process control into two independent timers: a first timer for controlling new transmission and a second timer for controlling retransmission. This segmentation allows independent management of new data transmission and retransmission operations, preventing interference between them while maintaining efficient resource utilization. The first timer prevents new transmission during its running period, while the second timer prevents retransmission during its running period, enabling precise control over when each operation can occur.
2Reliability
If automatic retransmission is unlimited, then data reliability is improved, but resource utilization deteriorates and communication fairness is reduced
Solution Approach 1:
The patent introduces dynamic timer control to manage the retransmission process. The second timer is started when retransmission is needed and stops after a predetermined period, dynamically controlling the retransmission window. This dynamic mechanism ensures that retransmission occurs only when necessary (improving reliability) while automatically stopping after a set time to prevent endless retransmission cycles, thereby optimizing resource utilization and ensuring communication fairness among multiple users.
Data Source
AI summary
The present disclosure discloses a data transmission method, comprising: a terminal device determines, according to the states of a first timer and a second timer corresponding to a hybrid automatic repeat request (HARQ) process, whether the HARQ process corresponding to a first configuration authorization resource is available for transmitting data to be transmitted; during the operation of the first timer, the terminal device does not perform a new transmission on the HARQ process; and during the operation of the second timer, the terminal device does not perform retransmission on the HARQ process. The present disclosure further discloses a terminal device and a storage medium.