Proximity-Based PRS Resource Selection for Rx-Tx Measurement Accuracy
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Solution Overview
Problem
Conventional wireless communication systems face challenges in dynamically adjusting bandwidth used by user equipment (UE) for positioning reference signals (PRS) in response to environmental conditions, leading to inefficiencies in Rx-Tx measurements due to the lack of proximity consideration between PRS and SRS resources.
Innovation Solution
A method where the UE selects PRS resources based on their proximity to SRS resources, ensuring that the selected PRS resources satisfy the PRS-SRS proximity requirement for accurate Rx-Tx measurements, by receiving information from both a network entity and a base station, and using these resources for UE Rx-Tx measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE uses conventional PRS resources without proximity consideration to SRS resources, then the bandwidth utilization is higher and resource selection is simpler, but the measurement accuracy of Rx-Tx measurements deteriorates due to lack of proximity between PRS and SRS resources
Solution Approach 1:
The network entity pre-configures PRS resources with proximity information to SRS resources and provides this information to the UE in advance. This allows the UE to select appropriate PRS resources based on the pre-provided proximity data without performing complex real-time calculations, thereby improving measurement accuracy while keeping the selection process relatively simple.
2Measurement precision
If the UE selects PRS resources based on proximity to SRS resources, then the measurement accuracy improves, but the processing time and computational complexity increase
Solution Approach 1:
The network entity performs the proximity calculation and selects suitable PRS resources in advance, providing the UE with pre-identified resources that satisfy the proximity requirement. This shifts the computational burden from the UE to the network entity and performs the selection beforehand, reducing both the UE's processing time and computational complexity while maintaining measurement accuracy.
Solution Approach 2:
The network entity autonomously identifies and selects PRS resources that meet the proximity requirement to SRS resources, without requiring the UE to perform complex selection algorithms. The network entity serves itself by making the selection based on its knowledge of the network configuration, thereby reducing the time and computational resources needed at the UE side.
3Adaptability or versatility
If the system provides detailed information about all PRS resources to the UE, then the UE has more flexibility in selection, but the signaling overhead increases
Solution Approach 1:
Instead of providing complete PRS resource information to the UE, the network entity extracts and provides only the essential proximity-related information that the UE needs for selection. This selective information provision maintains the UE's ability to make informed selections while significantly reducing the signaling overhead compared to transmitting full resource descriptions.
Data Source
AI summary
Disclosed are various techniques for wireless communication. In an aspect, a user equipment (UE) may receive, from a network entity, first information identifying positioning reference signal (PRS) resources. The UE may receive, from a base station, second information identifying sounding reference signal (SRS) resources. The UE may select, from PRS resources identified by the first information, PRS resources that satisfy a PRS-SRS proximity requirement with regard to at least one SRS resource identified by the second information. The UE may use the selected PRS resources at least for performing UE Rx-Tx measurements. In another aspect, a network entity may transmit, to a UE, first information identifying PRS resources. The network entity may transmit, to the UE, second information specifying a number of PRS resources to be used by the UE at least for performing UE Rx-Tx measurements.