mmWave Beam Control Using Camera Distance Detection
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Solution Overview
Problem
In wireless communication systems, especially those using mmWave technology, external objects such as human bodies can significantly reduce communication performance by absorbing or reflecting beams, leading to increased time and power consumption during beam searching, and potential adverse effects on human health due to higher frequency bands.
Innovation Solution
An electronic device equipped with a mmWave antenna module, a camera for distance and location measurement, and a communication processor that identifies communication performance, determines if beam direction change is needed, measures external object distance and location, and controls beam searching within a defined area to optimize beam direction and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam searching is performed in the entire beam coverage area, then the probability of finding the optimal beam direction is increased, but the time and power consumption for beam searching is significantly increased
Solution Approach 1:
The camera performs preliminary detection of external objects and their locations before beam searching begins. This preliminary action provides advance information that allows the beam searching process to be optimized by excluding areas where external objects are detected, thereby reducing the search area and time while maintaining communication performance
Solution Approach 2:
The camera acts as an intermediary device that provides spatial information about external objects to the beam forming system. This intermediary information enables the system to intelligently adjust the beam searching strategy by avoiding areas with external objects, thus reducing search time without compromising communication quality
2Reliability
If beam searching is performed in the entire beam coverage area, then all possible beam directions are explored, but the power consumption during beam searching is unnecessarily increased
Solution Approach 1:
External object detection is performed in advance using the camera before initiating beam searching. This preliminary detection allows the system to pre-calculate and exclude regions containing external objects from the beam searching process, thereby reducing the number of beam directions that need to be tested and lowering power consumption
Solution Approach 2:
Instead of performing exhaustive beam searching across the entire beam coverage area, the system performs partial beam searching only in regions not occupied by external objects. This partial action approach maintains sufficient communication performance while significantly reducing power consumption by avoiding unnecessary searches in blocked directions
3Area of stationary object
If beam searching includes areas with external objects, then comprehensive coverage is achieved, but the time required for beam searching is increased
Solution Approach 1:
The system performs preliminary detection of external objects and their spatial locations before beam searching begins. This advance information allows the beam coverage area to be dynamically adjusted by excluding regions with external objects, thereby maintaining comprehensive coverage in valid areas while reducing the overall search time
Solution Approach 2:
The beam coverage area is segmented into multiple regions based on external object locations detected by the camera. The system then performs beam searching only in the valid segments free from external objects, rather than treating the entire coverage area as a single search space. This segmentation approach maintains comprehensive coverage where needed while eliminating time-wasting searches in blocked regions
Data Source
AI summary
An electronic device and an operation method of an electronic device are provided. The electronic device includes at least one mmWave antenna module configured to include a plurality of antennas, a camera capable of measuring a distance between an external object and the electronic device, a communication processor configured to be operationally connected to the at least one mmWave antenna module, and an application processor configured to be operationally connected to the camera and the communication processor.