Sidelink RSRP Threshold Adaptation for Resource Utilization
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Solution Overview
Problem
In sidelink wireless communication systems, especially in aperiodic traffic scenarios, the existing reference signal receive power (RSRP) threshold adaptation methods fail to effectively utilize available resources due to limited window sizes and interference, leading to performance degradation and increased latency.
Innovation Solution
The proposed solution involves using multiple windows to dynamically adjust the RSRP threshold by identifying free resources in a first window and a second window, increasing the threshold when the percentage of free resources falls below a certain threshold in either window, thereby optimizing resource utilization and packet reception rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single window is used for RSRP threshold adaptation, then the system complexity is low, but the resource utilization is insufficient and latency increases
Solution Approach 1:
The patent divides the resource selection process into multiple windows (first window and second window) with different sizes. The first window has a larger size for capturing additional resources earlier in time, while the second window has a smaller size for maintaining compatibility with existing systems. This segmentation allows the system to improve resource utilization without completely overhauling the existing single-window approach.
Solution Approach 2:
The patent dynamically adjusts the RSRP threshold based on the percentage of free resources identified in the multiple windows. When the free resource percentage falls below a threshold in either window, the RSRP threshold is increased to capture more resources. This dynamic adaptation allows the system to respond to changing channel conditions and traffic patterns, improving productivity while managing complexity through adaptive rather than static configurations.
2Productivity
If the RSRP threshold is increased to capture more resources, then resource utilization improves, but interference increases
Solution Approach 1:
The patent applies different RSRP threshold values and window sizes to different local conditions. The first window uses a larger size and potentially different threshold characteristics compared to the second window, allowing the system to optimize for resource capture in specific scenarios while maintaining lower interference in others. This local differentiation enables targeted resource utilization improvement without uniformly increasing interference across all conditions.
Solution Approach 2:
The patent changes the RSRP threshold parameter dynamically based on the free resource percentage observed in the multiple windows. When resources are scarce (free resource percentage below threshold), the RSRP threshold is increased to capture more resources. When resources are abundant, the threshold can be maintained at lower levels, reducing interference. This parameter adaptation resolves the contradiction by making interference management conditional rather than fixed.
3Loss of time
If multiple windows are used for resource identification, then latency is reduced by capturing resources earlier, but the complexity of resource management increases
Solution Approach 1:
The patent segments the resource identification process into multiple windows with different temporal extents. The first window captures resources earlier in time with a larger size, reducing latency for time-sensitive transmissions. The second window with smaller size handles more conventional resource selection. This segmentation reduces latency for critical resources while managing complexity by maintaining a structured, two-window framework rather than a completely new resource management system.
Solution Approach 2:
The patent performs preliminary resource identification in the first window before proceeding to the second window. By identifying free resources earlier in the first window with larger size, the system can make faster transmission decisions and reduce latency. This preliminary action allows the system to prepare resource selection in advance without committing to a completely complex multi-stage process, as the second window serves as a confirmation or refinement stage.
Data Source
AI summary
Aspects of the disclosure relate to wireless communications including sidelink communications between wireless devices. Adaptation of a resource exclusion reference signal receive power (RSRP) threshold for scheduling resources for a device using such sidelink communications includes utilization of first and second time/frequency windows of available resources to determine the number of free resources in each window. If the free resources in either window are less than a predetermined free resource threshold, the resource exclusion RSRP threshold is increased to gain further potential time/frequency resources that may be scheduled by the device.