Terminal Device LBT Failure Reporting for 5G Unlicensed Spectrum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 5G New Radio (NR) Access system using unlicensed spectrum, the existing random access technology does not allow terminal devices to report LBT failure to network devices, preventing the network from adjusting resource configurations accordingly and impacting fair coexistence with other systems like WiFi.
Innovation Solution
A method for reporting the situation of random access, where terminal devices send LBT detection results to network devices through random access reports, enabling the network to adjust resource configurations and mitigate LBT failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal device does not report LBT failure to the network device, then the random access procedure can be kept simple, but the network device cannot adjust the resource configuration of random access accordingly
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device reports LBT detection results to the network device through uplink signaling. This feedback enables the network device to adaptively adjust random access resource configurations based on actual channel conditions, resolving the contradiction between maintaining simple procedures and enabling network adaptability.
2Reliability
If the terminal device performs LBT detection before sending messages, then the terminal can determine channel occupancy status, but the terminal cannot adjust random access resources and needs to resend messages when LBT detection fails
Solution Approach 1:
The terminal device feeds back LBT detection results to the network device, enabling the network to adjust random access resource configurations. This feedback loop allows the system to adapt to channel conditions, reducing the need for message resending and improving overall random access efficiency while maintaining reliable channel access detection.
3Loss of information
If the network device cannot obtain LBT detection results from terminal devices, then the signaling overhead is reduced, but the network cannot optimize random access resource allocation
Solution Approach 1:
The patent establishes a feedback mechanism where terminal devices report LBT detection results to the network device through uplink signaling. This feedback enables the network device to optimize random access resource allocation based on actual channel conditions, resolving the contradiction between minimizing signaling overhead and maximizing resource optimization capability.
Data Source
Figure 1~3
Figure 4~7
Figure 8~10
AI summary
The embodiments of the present application relate to a method for reporting a random access situation, and a terminal device and a network device. The method comprises: sending, to a network device, a random access situation which has been executed by a terminal device, wherein the random access situation comprises information related to a listen before talk (LBT) detection result of the terminal device in a random access attempt. By means of the embodiments of the present application, a random access situation which has been executed by a terminal device can be reported to a network side.