Dynamic Measurement Gap Configuration for 5G Positioning Accuracy
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Solution Overview
Problem
Conventional positioning measurement methods in wireless communication systems, such as 5G networks, face inaccuracies due to non-line-of-sight (NLOS) conditions, leading to overestimation of time-of-arrival (TOA) and subsequent triangulation errors, which affect the precise location determination of user equipment (UE).
Innovation Solution
The method involves requesting an enhanced positioning measurement report from UE, which includes a channel power delay profile (PDP) and a probability distribution of TOA, requiring an extended measurement period to perform these measurements, allowing for more accurate location estimation by combining likelihoods and feature fusion to correct for NLOS signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an extended measurement period is used for enhanced positioning measurements, then positioning accuracy is improved, but measurement time and system resource consumption increase
Solution Approach 1:
The patent implements dynamic configuration of measurement gaps, where the network entity adjusts the measurement period and gap patterns based on UE mobility state, positioning accuracy requirements, and channel conditions. Fast-moving UEs receive shorter measurement periods while stationary UEs receive extended periods for enhanced measurements, resolving the contradiction between positioning accuracy and measurement time through adaptive dynamic configuration
Solution Approach 2:
The system changes multiple parameters including measurement period duration, gap pattern configuration, and gap repetition period based on service requirements and channel conditions. By dynamically adjusting these parameters, the system optimizes the balance between positioning accuracy (requiring longer measurements) and measurement time (requiring shorter measurements)
2Measurement precision
If measurement gaps are configured for positioning measurements, then positioning measurements can be performed, but data transmission and reception are interrupted
Solution Approach 1:
The patent employs dynamic gap configuration where measurement gaps are activated only when positioning measurements are required. The network entity controls the timing and duration of gaps based on current positioning needs, UE mobility state, and data traffic conditions, minimizing interruptions to data transmission while enabling positioning measurements when needed
Solution Approach 2:
Measurement gaps are configured as periodic interruptions with configurable gap repetition periods. This allows the system to schedule positioning measurements at regular intervals rather than continuously, enabling data transmission during non-gap periods while periodically capturing positioning data, thus balancing positioning capability with data transmission efficiency
3Measurement precision
If enhanced positioning measurements with channel PDP and TOA distribution are requested, then positioning accuracy is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent segments the enhanced positioning measurement process into distinct components: channel PDP measurement, TOA distribution measurement, and positioning calculation. Each component is processed separately and independently, allowing the UE to perform measurements in stages and enabling the network to selectively request specific measurement types based on accuracy requirements, reducing overall processing complexity
Solution Approach 2:
The network entity acts as an intermediary that receives raw measurement data from the UE and performs sophisticated processing including likelihood function calculation and NLOS detection. This shifts complex processing from the UE to the network, reducing device complexity while maintaining high positioning accuracy through advanced algorithms executed at the network side
4Measurement precision
If a longer measurement period is used for enhanced positioning, then NLOS detection accuracy is improved, but responsiveness to mobility changes decreases
Solution Approach 1:
The patent implements dynamic adjustment of measurement period duration based on UE mobility state. Fast-moving UEs receive shorter measurement periods for quick repositioning while stationary or slow-moving UEs receive longer periods for enhanced NLOS detection accuracy. The network monitors mobility indicators and adapts measurement configuration in real-time, resolving the contradiction between NLOS detection accuracy and mobility tracking speed
Solution Approach 2:
Different measurement period durations are applied to different UEs or different time periods based on local conditions. The system tailors the measurement period length to the specific needs of each UE or situation, providing long measurement periods where high accuracy is needed and short periods where fast tracking is needed, optimizing both NLOS detection accuracy and mobility response
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) may receive, from a network entity, a request to provide an enhanced positioning measurement report comprising a positioning measurement and further comprising a report of components of a channel power delay profile (PDP), a report of a probability distribution of times of arrival (ToA), or both. The UE may determine an enhanced measurement period required by the UE to perform the enhanced positioning measurement, wherein the enhanced measurement period is longer than a standard measurement period required by the UE to perform a non-enhanced positioning measurement. The UE may perform the enhanced positioning measurement using the enhanced measurement period. The UE may provide the enhanced positioning measurement report to the network entity.