Dedicated SL PRS Resource Pools for RSSI-Based CBR Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for mobile broadband communication and the need for enhanced reliability and low latency in wireless communication systems, particularly in sidelink (SL) communication, necessitates improved methods for measuring and managing channel busy ratios (CBRs) in dedicated resource pools for positioning reference signals (PRS) to optimize resource utilization and communication efficiency.
Innovation Solution
A method and device for obtaining configuration information related to a dedicated resource pool for SL PRS, measuring SL PRS received signal strength indicator (RSSI) within a CBR measurement window, and determining SL PRS CBR based on the number of SL PRS resources exceeding a threshold, allowing for efficient resource management and communication optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated resource pool for SL PRS is established, then positioning accuracy is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The resource pool is segmented into dedicated SL PRS resources and other communication resources. By separating PRS resources, the patent ensures positioning accuracy while managing overall resource utilization through dedicated allocation rather than shared competition.
Solution Approach 2:
The patent introduces SL PRS CBR (Channel Busy Ratio) as a new parameter to measure and manage the dedicated resource pool's utilization status. This parameter enables dynamic adjustment and optimization of resource allocation while maintaining positioning functionality.
2Measurement precision
If SL PRS CBR measurement is implemented, then resource management accuracy is improved, but measurement complexity increases
Solution Approach 1:
The UE performs self-measurement of SL PRS CBR using its own received signal strength indicator (RSSI) in the dedicated resource pool. This self-service approach eliminates the need for complex network-side measurement and reporting mechanisms, reducing overall system complexity while maintaining accurate resource management.
Solution Approach 2:
The patent replaces complex network-based measurement mechanisms with a simpler UE-based RSSI measurement approach. By substituting mechanical/network complexity with wireless signal measurement, the system achieves accurate resource management with reduced complexity.
3Reliability
If dedicated resource pool is used for SL PRS, then positioning reliability is improved, but channel congestion increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE measures and reports SL PRS CBR information. This feedback enables the network to dynamically adjust resource allocation, prioritize PRS transmissions, and manage channel congestion while maintaining positioning reliability through dedicated resource protection.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method of performing wireless communication by a first device and a device supporting same are provided. The method may comprise the steps of: obtaining configuration information related to a dedicated resource pool for sidelink (SL) positioning reference signal (PRS); measuring an SL PRS received signal strength indicator (RSSI) in the dedicated resource pool over an SL PRS channel busy ratio (CBR) measurement window; and obtaining an SL PRS CBR on the basis of the number of SL PRS resources in the dedicated resource pool, the SL PRS RSSIs of which exceed a threshold over the SL PRS CBR measurement window, and the number of all the SL PRS resources configured in the dedicated resource pool over the SL PRS CBR measurement window.