Carrier Phase Positioning Reference Signal Resource Segmentation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G, face challenges in achieving accurate carrier phase positioning due to limitations in spectral efficiency, signaling efficiency, and latency, especially in determining precise distances using subcarrier phase measurements.
Innovation Solution
The system provides enhanced carrier phase measurements by transmitting reference signals for subcarrier set pairs across different resources, allowing user equipment (UE) to report phase measurement capabilities and receive configuration requests from network entities, thereby improving the availability and accuracy of phase measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are transmitted for subcarrier set pairs across different resources, then carrier phase measurement accuracy is improved, but spectral efficiency is reduced
Solution Approach 1:
The reference signal is divided into multiple resources (e.g., different time slots, frequency resources, or spatial layers) that can be independently configured for subcarrier set pairs. This segmentation allows the system to transmit reference signals only where needed for phase measurements, reducing overall spectral overhead while maintaining measurement accuracy.
Solution Approach 2:
The reference signal structure is designed to serve multiple functions simultaneously: it enables carrier phase measurements for positioning, supports channel estimation, and provides synchronization capabilities. This multi-functionality reduces the need for separate dedicated signals, thereby improving spectral efficiency while maintaining measurement accuracy.
2Measurement precision
If phase measurement capabilities are reported and configuration requests are exchanged between UE and network entity, then positioning accuracy is improved, but signaling latency is increased
Solution Approach 1:
The UE reports its phase measurement capabilities to the network entity in advance, before actual positioning measurements are performed. This preliminary action allows the network entity to pre-configure optimal measurement parameters and resources, reducing the need for iterative configuration exchanges and thereby reducing signaling latency while maintaining high positioning accuracy.
Solution Approach 2:
A feedback mechanism is established where the UE reports phase measurement capabilities and measurement results back to the network entity. This feedback loop enables the network to dynamically adjust configuration parameters based on actual measurement performance, optimizing the balance between positioning accuracy and signaling overhead/latency.
Data Source
AI summary
Disclosed are systems, apparatuses, processes, and computer-readable media to determine a location of a device using carrier phase positioning. A process includes transmitting, at the device to a network entity, a phase measurement capability of a device (e.g., a user equipment (UE)) for subcarrier set pairs of different resources received by the device. The different resources are associated with a reference signal. The process can include receiving, at the device, a phase measurement request from a network entity for configuring phase measurements of the subcarrier set pairs of the different resources. The process can include transmitting a phase measurement report to the network entity based on the phase measurement request, the phase measurement report including information associated with a measured phase difference of at least one subcarrier set pair associated with the different resources.