PSI Timeline Reporting for Low-Overhead Aperiodic PRS Positioning
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Solution Overview
Problem
The 5G wireless communication standard faces challenges in enhancing spectral efficiency and reducing latency for positioning services, particularly in managing the increased number of connections and sensor deployments, which existing technologies have not adequately addressed.
Innovation Solution
The implementation of positioning reference signals (PRS) and aperiodic channel state information (CSI) reporting in New Radio (NR) to optimize positioning state information (PSI) reporting, enabling more precise and efficient location determination for user equipment (UEs) in diverse wireless environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If aperiodic CSI reporting is used for positioning, then positioning flexibility and responsiveness are improved, but reporting overhead and resource consumption increase
Solution Approach 1:
The positioning reference signal resources are segmented into multiple resource sets, where each resource set contains multiple PRS resources. The UE reports positioning state information for each resource set separately, allowing the network to selectively activate or deactivate specific resource sets based on positioning needs, thereby reducing overall reporting overhead while maintaining flexibility.
Solution Approach 2:
The patent implements dynamic aperiodic CSI reporting where the reporting is triggered by downlink control information only when positioning measurements are needed. The reporting frequency and resource allocation dynamically adapt to the positioning requirements, enabling the system to reduce reporting overhead during periods when precise positioning is not required while maintaining high responsiveness when it is needed.
2Measurement precision
If multiple positioning reference signal resource sets are configured, then positioning precision is improved, but device complexity and processing requirements increase
Solution Approach 1:
Positioning reference signals are divided into multiple resource sets with different configurations (different time frequencies, different TRPs). The UE processes each resource set separately and reports positioning state information for each set independently. This segmentation allows the network to activate only the necessary resource sets for current positioning needs, reducing processing complexity while maintaining precision through selective multi-TRP measurements.
Solution Approach 2:
Different resource sets are configured with different local optimizations - some resource sets may use more PRS resources for high-precision requirements in certain geographic areas, while other resource sets use fewer resources for areas with lower precision requirements. The network can selectively activate resource sets with appropriate local quality characteristics to match specific positioning scenarios, balancing precision and complexity.
Data Source
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AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) receives, during one or more time units up to a first time, a configuration to provide a positioning state information (PSI) report, measures, after the first time up to a second time, one or more positioning reference signal (PRS) transmissions, and transmits, at a third time after the second time, the PSI report on an uplink physical channel, the PSI report including measurements of the one or more PRS resources, wherein a length of time between the second time and the third time is greater than a timing requirement Z'.