Relay Station Dynamic Beam Adaptation for High-Speed Terminals
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Solution Overview
Problem
In high-speed wireless communication systems like 5G, non-regenerative relay becomes unstable due to changing optimal beam patterns at relay stations as terminal stations move rapidly, leading to decreased SINR (Signal to Interference and Noise Ratio).
Innovation Solution
A relay station equipped with multiple antennas and a controller that dynamically updates beam patterns based on SINR measurements, selecting the optimal beam pattern from a set to maintain antenna gain and stability during high-speed terminal station movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If non-regenerative relay is used for low-latency communication, then latency is reduced, but communication stability deteriorates when terminal stations move at high speed due to beam pattern mismatch
Solution Approach 1:
The patent applies dynamics by making the beam pattern adjustable and updateable in real-time. The relay station dynamically switches between multiple pre-configured beam patterns based on terminal station movement, allowing the system to adapt to changing conditions while maintaining low latency through non-regenerative relay operation.
Solution Approach 2:
The patent changes the beam pattern parameter dynamically. Multiple beam patterns are prepared in advance with different directional characteristics, and the system selects and switches between them based on terminal movement detection, thereby maintaining communication stability without requiring full regenerative processing.
2Device complexity
If beam pattern is fixed for non-regenerative relay, then device complexity is reduced, but SINR decreases when terminal stations move rapidly
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple beam patterns before relay operation begins. When terminal movement is detected, the system can immediately switch to an appropriate pre-prepared beam pattern without complex real-time calculation, maintaining high SINR while keeping the relay processing simple and non-regenerative.
Solution Approach 2:
The system uses feedback from terminal movement detection to trigger beam pattern switching. When movement exceeding a threshold is detected, the relay station receives movement information and switches beam patterns accordingly, maintaining high SINR through simple feedback-driven selection rather than complex continuous adjustment.
3Measurement precision
If beam pattern updates are performed frequently to track high-speed terminal movement, then SINR is maintained, but communication latency increases due to update overhead
Solution Approach 1:
The patent applies periodic action by updating beam patterns at specific intervals triggered by terminal movement detection rather than continuously. The system monitors terminal position and performs beam pattern switching only when movement exceeds a predetermined threshold, reducing unnecessary updates while maintaining SINR during actual movement events.
Solution Approach 2:
The system skips unnecessary beam pattern updates by using non-regenerative relay with pre-configured patterns. When terminal movement is detected, the system rapidly switches to the appropriate pre-prepared beam pattern without performing full regenerative processing, thereby rushing through the adaptation process with minimal latency overhead.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Stable communication is maintained through non-regenerative relay by continuously adapting beam patterns to ensure high SINR, even with fast-moving terminal stations.
Implementation Method 1
By using beam forming in which a plurality of antenna elements are used to enhance antenna gain for a terminal station, communication quality can be improved.
Implementation Method 2
non-regenerative relay is preferable in which, at a relay station, signal amplification and simple filtering are performed without demodulation or decoding
Implementation Method 3
an SINR (signal to interference and noise power ratio) of a relayed signal decreases
Data Source
AI summary
A relay station includes first antennas used for communication with the terminal station, a second antenna used for communication with a base station, and a radio device performing non-regenerative relay. The relay station transmits a first beam pattern with an maximum SINR of a received signal from the terminal station, the received signal including a part of self-interference and measured in a first slot of a wireless frame. An information processing apparatus acquires a beam pattern set based on the first beam pattern and transmits to the relay station. In a second slot, based on SINRs of received signals from the terminal station measured for each of beam patterns included in the beam pattern set in a plurality of symbols, the relay station selects a second beam pattern from the beam pattern set, and updates a beam pattern to be used by the first antennas to the second beam pattern.