LBT Resource Coordination for Unlicensed 5G Transmission
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Solution Overview
Problem
In communication systems, particularly in 5G networks operating in unlicensed frequency bands, conflicts in resource allocation can lead to transmission interference and resource wastage due to multiple UEs performing listen-before-talk (LBT) detection at the same location, resulting in inefficient use of transmission resources.
Innovation Solution
A method for resource transmission in terminal devices, where a network device provides first information to indicate whether to perform LBT detection or resource transmission, and the terminal device determines accordingly to avoid conflicts and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple UEs perform LBT detection at the same location, then resource allocation is simplified, but transmission interference increases and resource utilization deteriorates
Solution Approach 1:
The patent segments the time-frequency resource space by dividing it into multiple resource sets with different LBT detection locations and timing. Each UE is assigned to specific resource sets, creating segmented access patterns that prevent simultaneous LBT detections at the same location, thereby reducing interference while maintaining manageable allocation complexity
Solution Approach 2:
The patent introduces dynamic resource allocation where the network device can flexibly assign different resource sets to different UEs based on channel conditions, traffic requirements, and interference patterns. This dynamic assignment optimizes resource utilization efficiency while adapting to changing system states
2Ease of operation
If UEs perform LBT detection simultaneously at the same location, then access procedure is simplified, but transmission conflicts increase
Solution Approach 1:
The patent implements preliminary action by requiring UEs to perform LBT detection at predetermined locations and times before actual data transmission. The network device configures specific LBT detection occasions for different resource sets, ensuring that detection happens in advance with proper timing offsets, which prevents simultaneous transmissions and reduces conflicts
Solution Approach 2:
The patent introduces the network device as an intermediary that coordinates LBT detection timing and resource allocation. The network device sends configuration information to UEs, managing the detection process centrally to prevent conflicts while maintaining procedural simplicity for individual UEs
3Productivity
If resources are configured at conflicting locations, then resource allocation is efficient, but transmission interference increases
Solution Approach 1:
The patent applies local quality by assigning different LBT detection locations and timing characteristics to different resource sets. Each resource set has customized LBT parameters (locations, timing offsets, detection occasions) tailored to its specific allocation pattern, which eliminates interference at local collision points while maintaining overall allocation efficiency
Solution Approach 2:
The patent resolves resource conflicts by introducing additional dimensions to resource allocation: time dimension (different LBT detection occasions and timing offsets) and spatial dimension (different LBT detection locations). This multi-dimensional resource separation prevents interference while preserving efficient resource utilization
Data Source
AI summary
Provided are a resource transmission method, a terminal device, and a network device, which are applied to the technical field of communications and can reduce or prevent transmission interference and waste of transmission resources. The embodiment of the present invention involves: according to first information, determining not to perform listen before talk (LBT) detection and/or resource transmission, or determining to perform LBT detection and/or resource transmission for a first resource, wherein the first information is used for indicating at least one of the following: a second resource, performing LBT detection and/or resource transmission, and not performing LBT detection and/or resource transmission.