RIS Beam Configuration for Shadow Area Signal Quality
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Solution Overview
Problem
Current Reconfigurable Intelligent Surface (RIS) based beamforming technologies face limitations in received signal quality and base station system capacity, particularly in providing effective wireless communication to user equipment located in shadow areas due to obstacles.
Innovation Solution
A method for configuring beams by a base station, which involves determining beam parameters such as beamwidth, steering direction, and transmission power based on the location and area of a reflective surface, generating and transmitting beam configuration information, forming beams, receiving beam quality information, and adjusting beam formation to improve signal quality and system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional RIS-based beamforming is used, then wireless services can be provided to shadow area UEs, but received signal quality is insufficient
Solution Approach 1:
The base station determines specific beam parameters (beamwidth, steering direction, transmission power) based on the location and area of the reflective surface, creating locally optimized beams tailored to the shadow area requirements rather than using uniform beamforming across the entire cell
Solution Approach 2:
The system dynamically adjusts beam parameters including beamwidth, steering direction, and transmission power based on reflective surface information and beam quality feedback, allowing optimization of signal quality for shadow area UEs through parameter modification
2Area of stationary object
If conventional RIS-based beamforming is used, then shadow area coverage is extended, but base station system capacity is limited
Solution Approach 1:
Narrowly aimed beams are formed specifically for the reflective surface location, concentrating transmit power in the shadow area direction to extend service coverage while maintaining system capacity through efficient power utilization
Solution Approach 2:
The system segments the coverage area by identifying shadow areas and forming dedicated beams for reflective surfaces in those regions, allowing simultaneous service to both line-of-sight and shadow area UEs through spatial beam segmentation
3Length of stationary object
If beamforming is used to reach distant UEs, then propagation distance is extended, but interference increases
Solution Approach 1:
The beam steering direction is precisely determined based on the reflective surface location, directing beams narrowly toward the intended target while minimizing energy spillage and interference to other directions
Solution Approach 2:
The system dynamically adjusts beam parameters based on feedback information about beam quality and reflective surface conditions, optimizing beam direction and width to maintain long-distance propagation while reducing interference through adaptive control
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
The proposed method enhances the signal quality of reflected beams for user equipment in shadow areas and increases the base station system capacity by forming narrowly aimed beams for the reflective surface, reducing interference and extending service areas.
Implementation Method 1
RIS can reflect beams received from a base station and provide the reflected beams to UEs located in shadow areas
Data Source
AI summary
Various embodiments for beam configuration in a wireless communication system are disclosed. In one embodiment, a method for configuring a beam by a base station may include determining a beam parameter including at least one of a beam width, a beam aiming direction, and a beam transmission power of a beam based on at least one of a location and an area of a reflective surface; generating beam configuration information including at least one beam based on the determined beam parameter and transmitting the beam configuration information to a controller that controls the reflecting surface; forming the at least one beam according to the beam parameter and the beam configuration information; receiving beam quality information from the controller; and adjusting beamforming based on the received beam quality information.