Beamforming Codebook Selection for MPE-Compliant Radio Beams
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Solution Overview
Problem
The increasing demand for high-speed, reliable wireless communication with low power consumption is challenged by maximum permissible exposure (MPE) limitations and uplink power restrictions due to user equipment proximity to antennas, which can lead to health concerns and communication link issues.
Innovation Solution
A method for selecting a set of antenna elements based on criteria, determining a radio beam codebook, and applying a radio beam configuration that avoids obstacles and maintains MPE compliance, using beamforming techniques to steer radio beams dynamically while ensuring communication links are maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmit power is increased to improve communication performance, then data speed and reliability improve, but MPE (maximum permissible exposure) limitations are violated due to user equipment proximity to antennas
Solution Approach 1:
The patent divides the antenna system into multiple selectable antenna elements (first set and second set) that can be independently activated. By segmenting the antenna array and selectively deactivating certain elements, the system can reduce the effective radiated power in directions toward the user equipment while maintaining communication performance in other directions, thus resolving the contradiction between transmit power and MPE exposure.
Solution Approach 2:
The system dynamically switches between different antenna element configurations based on real-time conditions. The network device can transition between using the first set of antenna elements and the second set, allowing adaptive control of the radiation pattern to maintain high transmit power when safe and reduce it when MPE limits are approached, thereby dynamically resolving the power-exposure contradiction.
2Object-affected harmful factors
If antenna elements are deactivated to reduce MPE exposure, then health safety improves, but communication link reliability may deteriorate
Solution Approach 1:
The system employs feedback mechanisms where the network device monitors communication link quality and MPE exposure levels. Based on this feedback, the system intelligently selects which antenna elements to activate or deactivate, ensuring that communication reliability is maintained while keeping MPE exposure within safe limits. The feedback loop allows the system to adjust antenna configurations in response to changing channel conditions.
Solution Approach 2:
The patent changes the operational parameters of the antenna system by switching between different antenna element sets. This parameter change allows the system to alter the radiation pattern and effective transmit power without compromising the fundamental communication link, thereby maintaining reliability while reducing MPE exposure when needed.
3Reliability
If beam steering is made flexible to avoid obstacles and optimize performance, then communication reliability improves, but system complexity increases due to multiple antenna configurations
Solution Approach 1:
The system performs preliminary configuration by pre-defining multiple sets of antenna elements with different radiation characteristics. These configurations are prepared in advance, allowing the network device to quickly switch between them without complex real-time calculations. This preliminary action reduces the computational complexity during operation while maintaining the ability to perform flexible beam steering for obstacle avoidance and link optimization.
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
Enables flexible beam steering and increased transmit power, avoiding MPE events without the need for dedicated sensors, thereby enhancing communication performance and compliance with health regulations.
Implementation Method 1
A method for selecting a set of antenna elements based on criteria, determining a radio beam codebook, and applying a radio beam configuration that avoids obstacles and maintains MPE compliance, using beamforming techniques to steer radio beams dynamically
Implementation Method 2
determining a radiation pattern obtainable based on the radio beam codebook
Data Source
AI summary
An apparatus, method and computer program product for: selecting (405), based on at least one first criterion, a set of antenna elements, determining (410) a radio beam codebook comprising a plurality of radio beam configurations for the set of antenna elements, determining (415) a radiation pattern obtainable based on the radio beam codebook, determining (420), based on the obtainable radiation pattern, a radio beam configuration that fulfills a second criterion, and applying (425) the radio beam configuration to a radio beam provided by the set of antenna elements.