Sensor-Guided Phased Array Beam Steering for Wireless Handover
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Solution Overview
Problem
Existing electronic devices face challenges in maintaining reliable wireless communications, particularly in millimeter and centimeter wave frequency bands, due to signal attenuation and distortion during propagation.
Innovation Solution
The integration of phased antenna arrays and control circuitry that uses sensor data, such as accelerometer and gyroscope data, to adjust beam steering and maintain wireless links without sweeping the entire field of view, allowing for efficient handover between different radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the beam is swept over the entire field of view to maintain wireless links, then the reliability of wireless communication is improved, but the latency increases and data loss occurs
Solution Approach 1:
The system performs preliminary beam alignment using sensor data (accelerometer, gyroscope, magnetometer) to predict device orientation changes before they occur. This allows the beam to be pre-positioned in the anticipated direction, eliminating the need for time-consuming full field-of-view sweeps after motion occurs.
Solution Approach 2:
The system continuously monitors sensor data providing real-time feedback about device orientation and motion. This feedback loop enables dynamic beam steering adjustments that track the intended communication direction, maintaining link reliability without requiring exhaustive sweeping procedures.
2Reliability
If the beam is swept over the entire field of view to maintain wireless links, then the reliability of wireless communication is improved, but the productivity decreases
Solution Approach 1:
By using sensor data to predict device orientation changes in advance, the system performs preliminary beam positioning before motion occurs. This eliminates idle sweeping time and maintains continuous high-speed data transmission, improving overall productivity.
Solution Approach 2:
The system replaces mechanical beam sweeping with sensor-based predictive beam steering. Instead of systematically scanning the entire field of view, the beam is directly steered to the predicted communication direction using accelerometer, gyroscope, and magnetometer data, significantly reducing time loss and improving data transmission efficiency.
3Device complexity
If handover between radio access technologies is performed reactively, then the device complexity is reduced, but the loss of time increases
Solution Approach 1:
The system performs preliminary assessments of external devices using sensor data to predict upcoming handover opportunities. By identifying suitable target devices before handover is needed and pre-establishing connections, the system minimizes actual handover time while maintaining manageable complexity through automated prediction algorithms.
Data Source
AI summary
An electronic device may be provided with wireless circuitry and control circuitry. The wireless circuitry may include a phased antenna array. Sensors and other circuitry in the electronic device may generate sensor data such as accelerometer data, gyroscope data, magnetometer data, location data, and spatial ranging data. The wireless circuitry may establish and maintain one or more wireless links with external devices based on the sensor data as the device moves over time. For example, the wireless circuitry may perform physical layer beam adjustments, inter-radio access technology handovers, intra-radio access technology handovers, and/or dual connectivity adjustments based on the sensor data. This may allow the device to maintain one or more wireless links without having to sweep the signal beam of the phased antenna array over its entire field of view each time the device has moved.