Carrier Phase Positioning with Subcarrier Measurement Negotiation
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G, face challenges in enhancing spectral efficiency and reducing latency in the communication of uplink and downlink reference signals between user equipment and base stations, which affect positioning accuracy and latency.
Innovation Solution
The implementation of enhanced carrier phase positioning techniques using subcarriers, where user equipment and network entities exchange phase measurement capabilities and reports, allowing for improved selection and negotiation of phase measurement steps and quality, enhancing carrier phase measurements for precise location estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase measurement requests and reports are exchanged between UE and network entity, then positioning accuracy is improved, but communication latency increases
Solution Approach 1:
The UE transmits phase measurement capability information to the network entity in advance, before actual positioning measurements are performed. This preliminary exchange of capability data allows the network entity to prepare appropriate measurement configurations, reducing the time required during actual positioning operations and thereby mitigating communication latency while maintaining high positioning accuracy.
2Measurement precision
If multiple subcarriers are used for phase measurements, then positioning accuracy is enhanced, but spectral efficiency decreases
Solution Approach 1:
The system uses a selected subset of subcarriers for phase measurements rather than all available subcarriers. The UE reports phase measurements for specific subcarriers based on capability information and network entity requests, achieving sufficient positioning accuracy through partial measurement action while preserving spectral resources for other communications, thus maintaining spectral efficiency.
Data Source
AI summary
Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications, such as to measure a location of a user equipment (UE). A process may include transmitting, at the UE (305), a phase measurement capability of the UE to a network entity (310, 315, 320) for determining a position of the UE. The process may further include receiving, at the UE from the network entity, a phase measurement request for reporting phase measurements for one or more subcarriers received by the UE. The phase measurement request is based on the phase measurement capability of the UE. The process may further include transmitting a phase measurement report to the network entity based on the phase measurement request. The phase measurement report includes information associated with a measured phase of at least one subcarrier of the one or more subcarriers.