Adaptive Beam-Forming for Wireless Communication Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in securing wider frequency bands and maintaining effective beam-forming, especially in mobile environments where radio path loss and beam selection errors occur, leading to reduced service coverage and communication quality.
Innovation Solution
A method and apparatus for adaptively performing beam-forming in wireless communication systems using reference signals to determine and change transmission beams, allowing for continuous optimization of beam selection and reducing beam selection errors, even in changing radio environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If beam-forming is applied in super high frequency band, then radio path loss is addressed and transmission distance is increased, but radio reach distance is shortened due to frequency increase
Solution Approach 1:
The system performs preliminary beam selection using reference signals before actual data transmission. The base station transmits reference signals through multiple beams, and the terminal measures and reports the preferred beam, allowing the system to pre-establish the optimal transmission path before communicating actual data, thus compensating for the inherent radio path loss at high frequencies
Solution Approach 2:
The system implements periodic beam obtaining procedures where reference signals are transmitted at regular intervals to maintain optimal beam selection. This periodic refresh of beam information ensures that the system adapts to changing radio conditions while maintaining the benefits of beam-forming against path loss
2Reliability
If periodic beam obtaining procedure is used, then beam selection is maintained, but beam selection errors occur and operational period is limited
Solution Approach 1:
The system dynamically adjusts beam selection based on terminal mobility and radio environment changes. When a beam selection error is detected (through reference signal measurements or communication failures), the system triggers a re-selection process, transitioning from static periodic beam use to dynamic adaptive beam management, thus extending the effective operational period of correct beam selections
3Reliability
If frequent beam reselection is performed, then beam selection errors are reduced, but system overhead and complexity increase
Solution Approach 1:
The system uses feedback from terminal measurements of reference signals to detect beam selection errors. The terminal measures reference signal quality and reports back to the base station, which uses this feedback to determine when beam reselection is necessary, avoiding unnecessary reselection operations and reducing system overhead while maintaining reliable beam selection
Solution Approach 2:
The system enables self-service beam management where the terminal autonomously measures reference signals, identifies beam selection errors, and requests beam changes when needed. This self-service mechanism reduces the need for complex network-controlled beam management while maintaining high beam selection accuracy
Data Source
AI summary
Apparatuses and methods for maintaining an optimal beam direction in a wireless communication system are provided. The method for operating a receiving node in a wireless communication system includes, determining a first transmission beam is determined as a preferred transmission beam using a plurality of reference signals transmitted by a transmitting node, generating preferred transmission beam information, transmitting the preferred transmission beam information to the transmitting node, receiving transmissions from the transmitting node via the first transmission beam, and determining whether a change of a transmission beam is necessary. When the change of the transmission beam is determined to be necessary, generating a beam change request and transmitting the beam change request to the transmitting node.