NRPPA Positioning Measurement Framework for 5G Accuracy
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Solution Overview
Problem
Current 5G and LTE wireless communication systems face challenges in performing accurate positioning measurements, especially in unlicensed spectrum and new radio access technologies, which affect network performance and user equipment location management.
Innovation Solution
The implementation of new positioning methods such as NR enhanced cell ID, multi-round trip time positioning, downlink angle of departure, downlink time difference of arrival, uplink time difference of arrival, and uplink angle of arrival, along with a common messaging framework for location management function nodes and gNB interactions to request and report positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional positioning methods are used in LTE systems, then basic location services are provided, but positioning accuracy is insufficient for advanced applications
Solution Approach 1:
The positioning system is segmented into multiple independent measurement components (RTT, TDOA, AoD, AoA, ECI) that can be individually selected and combined based on specific application requirements. This allows the system to achieve high positioning accuracy by selecting appropriate measurement types without requiring all components to be active simultaneously, thus managing complexity while improving precision.
Solution Approach 2:
The positioning system is designed with multi-functional capability to perform various positioning methods (RTT, TDOA, AoD, AoA, ECI) using a common messaging framework and measurement architecture. This universal design enables the system to adapt to different positioning scenarios and requirements without requiring separate dedicated systems for each method, improving accuracy while controlling overall system complexity.
2Measurement precision
If multiple positioning measurement types are implemented, then positioning accuracy improves, but system complexity and implementation difficulty increase
Solution Approach 1:
A common messaging framework acts as an intermediary between the location management function and gNB nodes, standardizing the exchange of positioning measurement information. This framework simplifies the implementation of multiple measurement types by providing unified message structures and procedures for RTT, TDOA, AoD, AoA, and ECI measurements, reducing the difficulty of detecting and measuring various positioning parameters while maintaining high accuracy.
3Adaptability or versatility
If positioning measurements are performed in unlicensed spectrum, then network capacity and coverage are enhanced, but measurement accuracy and reliability are reduced
Solution Approach 1:
The positioning system implements dynamic measurement and reporting mechanisms that can adapt to varying radio conditions in unlicensed spectrum. The system can dynamically select appropriate measurement types (RTT, TDOA, AoD, AoA) based on current channel conditions, interference levels, and spectrum availability, thereby maintaining measurement reliability while utilizing unlicensed spectrum for enhanced network capacity and coverage.
Data Source
AI summary
An apparatus for use in a RAN network node includes processing circuitry coupled to a memory. To configure the RAN network node for positioning measurement reporting in a wireless network, the processing circuitry is to decode a measurement request message from a location management function (LMF) node of the wireless network. The processing circuitry also encodes a measurement response message for transmission to the LMF node based on the measurement request message.