Relay Beam Pattern Switching for High-Speed Non-Regenerative Links
Find Innovative SolutionsGenerate Solutions
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 and potential communication disruption.
Innovation Solution
A relay station equipped with multiple antennas and a controller that dynamically updates beam patterns based on SINR measurements, selecting optimal beam patterns from a set to maintain antenna gain and minimize self-interference, even with 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 communication 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 non-regenerative relay operation.
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple beam patterns in advance. When terminal station movement is detected, the relay station can immediately switch to a pre-prepared appropriate beam pattern without requiring time-consuming real-time optimization calculations, thus maintaining both low latency and high stability.
2Device complexity
If beam pattern is fixed for non-regenerative relay, then device complexity is reduced, but SINR decreases when terminal stations move at high speed
Solution Approach 1:
The relay station dynamically selects from multiple pre-configured beam patterns based on terminal station movement detection. This dynamic adaptation allows the system to maintain high SINR without requiring complex real-time beam optimization algorithms, thus preserving relative simplicity while improving performance.
Solution Approach 2:
The patent changes the beam pattern parameter in response to terminal station movement. By switching between pre-defined beam patterns with different directional characteristics, the system adapts to moving terminals and maintains high SINR without increasing overall system complexity.
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 demodulation and decoding
Solution Approach 1:
Multiple beam patterns are pre-configured in advance for different terminal positions and movement scenarios. When terminal movement is detected, the relay station can immediately switch to an appropriate pre-configured pattern without performing time-consuming demodulation and decoding operations, thus maintaining high SINR while minimizing latency.
Solution Approach 2:
The system dynamically switches between pre-configured beam patterns based on terminal movement detection. This dynamic approach allows rapid adaptation to maintain high SINR without requiring frequent full beam optimization procedures that would increase latency in non-regenerative relay systems.
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.