Radio Network Node Precoder Report Distribution Analysis
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently detecting group movement of mobile devices, as the limited selection of precoder choices reduces the accuracy of movement estimation, making it difficult to track groups of users, such as those disembarking from a train or entering an event.
Innovation Solution
A method implemented by a radio network node that collects and analyzes precoder reports from user equipment to determine changes in the distribution of precoders over time intervals, allowing for the estimation of average radio directions and subsequent movement detection without the need for artificial phase wrapping or individual device tracking, thereby maintaining a low load on the radio interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the selection of precoder choices is limited to keep the number of reports low, then the overhead is reduced, but the accuracy of movement estimation deteriorates
Solution Approach 1:
The patent merges individual user precoder reports into a collective distribution analysis. Instead of tracking each user separately, the system combines reports from multiple users to analyze the overall precoder distribution pattern, which enables accurate group movement detection without requiring precise individual tracking for each user
Solution Approach 2:
The patent uses precoder distribution as a proxy or copy representation of user movement. By analyzing the statistical distribution of precoders rather than individual user positions, the system creates a simplified model that captures group movement characteristics while reducing the complexity of tracking each individual user
2Measurement precision
If individual device tracking is performed to improve movement detection accuracy, then measurement precision improves, but device complexity and computational load increase
Solution Approach 1:
The patent combines multiple individual tracking tasks into a single distribution analysis. Instead of processing each user's precoder changes separately, the system aggregates all reports and analyzes the collective distribution pattern, which simplifies the computational process while maintaining detection accuracy for group movements
Solution Approach 2:
The patent extracts the essential movement information from the precoder reports by analyzing the distribution characteristics rather than processing every individual detail. This extraction approach removes unnecessary complexity while preserving the core functionality of detecting group movement patterns
3Measurement precision
If precoder reports are collected frequently to improve movement estimation accuracy, then measurement precision improves, but the load on the radio interface increases
Solution Approach 1:
The patent merges multiple precoder reports into a single distribution analysis operation. By collecting reports and then analyzing their collective distribution rather than processing each report individually and frequently, the system reduces the computational load on the radio interface while maintaining accurate movement estimation
Solution Approach 2:
The patent uses partial analysis of the precoder distribution to achieve sufficient movement detection accuracy. Instead of requiring complete and frequent individual tracking, the system performs partial distribution analysis that captures the essential movement patterns with lower computational overhead
Data Source
AI summary
A method and a radio network node (110) for managing precoder reports from a set of user equipments (120) are disclosed. Each of the precoder reports indicates a precoder selected, by a respective user equipment (121, 122, 123) of the set of user equipments (120), to be used by the radio network node (110) for transmission to the respective user equipment (121, 122, 123). The radio network node (110) receives (202), in a first time interval, a first set of precoder reports from the set of user equipments (120). The radio network node (110) receives (204), in a second time interval, a second set of precoder reports from the set of user equipments (120). The radio network node (110) determines (209) a first distribution of precoders for the set of user equipments and a second distribution of precoders for the set of user equipments, wherein the precoders in the first distribution are indicated by the first set of precoder reports and the precoders in the second distribution are indicated by the second set of precoder reports, whereby a change in distribution of precoders for the set of user equipments (120) is detected. A corresponding computer program and a carrier therefor are also disclosed.