Radio Control Apparatus for Predictive Beamforming
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Solution Overview
Problem
Radio communication systems face significant challenges in maintaining effective communication links with terminal apparatuses that are moving, particularly when the terminal apparatuses are in vehicles or on foot, as the current beamforming techniques do not account for the varying movement conditions, leading to potential Radio Link Failures due to decreased reception levels.
Innovation Solution
A radio control apparatus that includes a location estimation unit, a type estimation unit, a movement prediction unit, and a selection unit to predict the future location of the terminal apparatus and determine optimal communication parameters, such as antenna and beam configurations, based on the estimated type and movement patterns to ensure stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If beamforming is performed without considering terminal movement conditions, then device complexity is reduced, but reception level and communication reliability deteriorate
Solution Approach 1:
The system performs preliminary actions by estimating the terminal's future location based on current location and movement type before the terminal actually moves. Beamforming parameters are adjusted in advance to compensate for the anticipated movement, ensuring continuous communication stability without requiring complex real-time tracking during movement.
Solution Approach 2:
The terminal apparatus self-identifies its movement type (vehicle, pedestrian, etc.) and provides this information to the base station. The base station then uses this self-provided information to automatically adjust beamforming parameters, creating a self-service mechanism that maintains reliability without adding significant complexity to the control system.
2Reliability
If beamforming parameters are adjusted frequently to track moving terminals, then reception level is maintained, but device complexity and processing overhead increase
Solution Approach 1:
Instead of continuously adjusting parameters during movement, the system performs preliminary estimation of the terminal's future position and pre-adjusts beamforming parameters before the terminal reaches that position. This reduces the frequency and complexity of parameter adjustments while maintaining stable reception levels throughout the movement trajectory.
3Reliability
If movement prediction and future location estimation are implemented, then communication stability improves, but measurement and processing requirements increase
Solution Approach 1:
The system segments the movement analysis by classifying terminals into discrete movement types (vehicle, pedestrian, etc.) based on their movement characteristics. This segmentation simplifies the measurement process by using predefined categories rather than requiring continuous, complex trajectory analysis, while still enabling effective future location prediction for each category.
Data Source
AI summary
In order to control radio communication with a terminal apparatus in accordance with a movement situation of the terminal apparatus, a radio control apparatus is configured to estimate a location of the terminal apparatus, estimate a type of the terminal apparatus, predict movement of the terminal apparatus based on the estimated location, predict a future location of the terminal apparatus, estimate, based on the estimated type, a reception level of a radio signal at the future location for each communication parameter, and determine the communication parameter to be used for the terminal apparatus at the future location, based on an estimation result of the reception level.