Location Server Time-Aligned Positioning Reference Signal Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately aligning time measurements for multi-round-trip-time (M-RTT) positioning, particularly in coordinating user equipment (UE) and base stations to optimize the transmission and reporting of periodic positioning reference signals, which affects positioning accuracy and efficiency.
Innovation Solution
A method involving a location server that transmits parameters for time and frequency information related to the transmission of periodic positioning reference signals, requests specific time instances for measurement reporting, and configures user equipment (UE) to transmit periodic sounding reference signals (SRS) while determining timing adjustments and prioritizing traffic to ensure accurate and efficient positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic positioning reference signals are transmitted continuously to improve positioning accuracy, then measurement precision is improved, but energy consumption and network resource usage increase
Solution Approach 1:
The patent implements periodic positioning reference signals (PRS) where UEs and base stations transmit positioning signals at specific periodic intervals rather than continuously. The location server configures periodicity parameters for PRS transmission, allowing the system to achieve positioning accuracy while reducing energy consumption and network resource usage by transmitting signals only when needed based on the periodic schedule.
2Productivity
If multiple network nodes perform positioning measurements simultaneously to improve positioning efficiency, then productivity is improved, but time alignment and coordination complexity increase
Solution Approach 1:
The location server acts as an intermediary that coordinates positioning measurements between multiple network nodes and UEs. It provides time alignment information, configures measurement parameters, and manages the scheduling of positioning reference signals. This central coordination mechanism enables multiple nodes to perform measurements simultaneously or in a coordinated manner, improving positioning efficiency while the location server manages the complexity of time alignment and resource allocation.
3Measurement precision
If timing adjustments are made frequently to maintain time alignment for positioning, then measurement precision is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The system dynamically adjusts timing parameters for positioning reference signal transmission based on measured time differences and synchronization requirements. The location server modifies transmission timing parameters, periodicity, and offset values to maintain time alignment between network nodes and UEs. This parameter adjustment approach ensures accurate time alignment for positioning measurements while optimizing signaling overhead by making changes only when necessary based on performance metrics.
Data Source
AI summary
Disclosed are techniques for communication. In an aspect, a location server transmits a first request to at least a first network node, the first request including at least a first set of parameters indicating one or more first time instances during which the first network node is expected to perform and report one or more first positioning measurements of periodic positioning reference signals transmitted by a second network node during a plurality of periodic time instances, the plurality of periodic time instances including the one or more first time instances, and receives a first measurement report from the first network node, the first measurement report including the one or more first positioning measurements of the periodic positioning reference signals transmitted by the second network node during the one or more first time instances.