Terminal Device Uplink Transmission MCOT Utilization
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Solution Overview
Problem
In licensed-assisted access using long term evolution (LAA-LTE) communications systems, the resource utilization and channel utilization of the maximum channel occupancy time (MCOT) are relatively low due to incomplete occupation of the MCOT by uplink transmissions in unlicensed frequency bands.
Innovation Solution
A data transmission method where a terminal device receives indication information from a network device to send first and second uplink transmissions on consecutive or inconsecutive time domain resources, allowing continued use of the MCOT not fully occupied by the first uplink transmission, thereby improving resource and channel utilization without interfering with other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device sends only one uplink transmission after channel listening, then the transmission is simple to manage, but the resource utilization and channel utilization of the MCOT are low
Solution Approach 1:
The patent segments the MCOT into multiple time domain resources, allowing the terminal device to send multiple uplink transmissions (first uplink transmission and second uplink transmission) within the same MCOT. This segmentation enables better utilization of the channel occupancy time while maintaining manageable complexity through clear resource allocation indicators from the network device.
Solution Approach 2:
The patent introduces dynamic resource allocation where the network device sends indication information to dynamically assign first and second time domain resources within the MCOT. This dynamic approach allows flexible adaptation to varying traffic conditions and improves resource utilization while keeping the system manageable through centralized control.
2Productivity
If the terminal device occupies the entire MCOT for a single transmission, then the transmission reliability is high, but the channel utilization decreases when the transmission data is small
Solution Approach 1:
The patent applies partial action by allowing the terminal device to send a second uplink transmission that utilizes only the remaining portion of the MCOT after the first transmission. This partial utilization of the MCOT ensures high channel utilization when data volume is small, while the structured two-transmission format maintains transmission reliability through proper resource allocation.
Data Source
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AI summary
Embodiments of this application provide a data transmission method, a terminal device, and a network device. The method includes: receiving, by a terminal device, indication information sent by a network device, where the indication information is used to indicate a first time domain resource used by the terminal device to send first uplink transmission; and sending, by the terminal device, the first uplink transmission to the network device on the first time domain resource, and sending second uplink transmission to the network device on a second time domain resource, where the second time domain resource is a time domain resource determined by the terminal device based on the first time domain resource, and the first time domain resource and the second time domain resource are consecutive or inconsecutive in time. According to the data transmission method, the terminal device, and the network device provided in the embodiments of this application, when the uplink transmission sent by the terminal device cannot completely occupy an MCOT, the terminal device may continue to send other uplink transmission by using the MCOT that is not completely occupied. This can improve resource utilization and channel utilization of the MCOT.