Unlicensed Spectrum Channel Resource Utilization
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Solution Overview
Problem
Current systems operating on unlicensed spectrum cannot adjust channel bandwidth in real-time based on channel status, leading to reduced channel resource utilization as idle channels not occupied by the service cannot be effectively used during maximum channel occupancy time.
Innovation Solution
A network device performs channel listening on unoccupied channels within the channel occupancy time and uses idle channels for data transmission, allowing for timely utilization of idle channels to improve resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a service occupies a transmission channel through contention in unlicensed spectrum, then the service gains exclusive access to the channel for maximum channel occupancy time, but idle channels that are not occupied by the service cannot be effectively used, reducing channel resource utilization
Solution Approach 1:
The patent combines the operations of channel listening and data transmission into a unified process. The network device performs channel listening on channels not occupied by the service during the channel occupancy time, and when idle channels are detected, they are merged into the data transmission process. This allows the service to simultaneously maintain its exclusive channel access while also utilizing additional idle channels, thereby improving overall channel resource utilization without compromising access reliability
Solution Approach 2:
The patent introduces dynamic channel selection capability during the channel occupancy time. Instead of statically assigning channels, the system dynamically listens to and selects idle channels based on real-time channel status. This dynamic approach allows the service to adaptively adjust its channel usage within the occupancy time, improving resource utilization while maintaining the reliability guarantees of exclusive access
Data Source
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AI summary
Embodiments of this application disclose a data transmission method and a communications apparatus, to improve channel resource utilization. The method in the embodiments of this application includes: sending, by a network device, first data to a terminal in a first subframe through a first channel, where the first channel is a channel occupied in a channel system by a service between the network device and the terminal; performing, by the network device, channel listening on a channel that is not occupied in the channel system by the service; and when there is a second channel in an idle state, sending, by the network device, second data of the service to the terminal in a second subframe through the first channel and the second channel, where the second subframe is after the first subframe. The service includes the first data and the second data, and a data frame of the service includes the first subframe and the second subframe.