Communication Device Beam Steering for Interference Mitigation
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Solution Overview
Problem
Communication devices face interference during mobility management due to the directional nature of higher frequency bands, where a selected beam for optimal communication can be compromised by interfering signals from nearby devices, leading to reduced communication quality.
Innovation Solution
A communication device with an RF frontend and a codebook manager application configures a reduced codebook of antenna array settings to steer beams away from interfering signals, using a subset of entries to efficiently manage mobility and mitigate interference by orienting scan cones to avoid receiving interfering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a narrow beam is selected for optimal communication quality, then communication quality is improved, but the beam can still intercept interfering signals from nearby devices
Solution Approach 1:
The patent implements dynamic beam adjustment by continuously monitoring interference levels and adapting the beamforming weights in real-time. The system transitions from static beam selection to dynamic beam steering, where the beam direction and shape are adjusted based on current interference conditions to maintain optimal communication quality while avoiding interfering signals.
Solution Approach 2:
The system changes the spatial parameters of the beam by adjusting the phase and amplitude weights across the antenna array elements. By modifying these parameters dynamically, the beam can be steered away from interfering signals while maintaining focus on the desired base station signal, thus resolving the contradiction between communication quality and interference avoidance.
2Object-affected harmful factors
If beam steering is used to avoid interfering signals, then interference is reduced, but the complexity of mobility management increases
Solution Approach 1:
The patent employs feedback mechanisms where the device continuously measures reference signal receive power across multiple beams and uses this feedback to automatically select the optimal beam. This closed-loop system simplifies mobility management by using measured performance data to drive beam selection, reducing the need for complex manual configuration while maintaining interference avoidance.
Solution Approach 2:
The system performs self-optimization by automatically monitoring interference conditions and adjusting beamforming parameters without external intervention. The device autonomously manages its own mobility and interference avoidance by evaluating reference signals and selecting appropriate beams, thereby reducing overall system complexity while maintaining performance.
3Use of energy by moving object
If a reduced codebook with fewer beams is used for mobility management, then power and computational efficiency are improved, but the ability to avoid interfering signals may be reduced
Solution Approach 1:
The patent enhances the effectiveness of each beam in the reduced codebook by applying sophisticated beamforming weight adjustments. Instead of relying on a large number of beams, the system optimizes the spatial characteristics of each selected beam to maximize signal quality and minimize interference, thereby maintaining interference avoidance capability with fewer beams and reduced power consumption.
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
This approach enhances communication quality by reducing device-to-device interference during mobility management, allowing the device to maintain optimal connectivity with the base station while minimizing the impact of interfering signals from nearby devices.
Implementation Method 1
Antenna elements are operated as an array to achieve antenna steering in particular directions. Each beam entry is used to configure the RF frontend to spatially steer a primary antenna gain of the particular antenna array in a respective direction relative to the communication device.
Data Source
AI summary
A communication device, computer program product, and method mitigate interference during mobility management of antenna beam selection. A controller of the communication device determines a first direction to a first downlink from a base station downlink that is beam steered toward the communication device. The controller determines a second direction to a second downlink from the base station that is beam steered toward a second communication device. The controller determines a scan cone of two or more beam entries oriented generally in the first direction and being at least one of angularly narrowed or directed away from the second direction to avoid receiving the second downlink. The controller configures the RF frontend of the communication device with a reduced codebook based on a subset of the two or more beam entries within the scan cone for mobility management of the communication device.