Multi-Band WLAN Sensing Using Segmented Frequency Bands
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Solution Overview
Problem
WLAN systems face challenges in balancing the trade-off between communication range and sensing resolution, with lower frequencies providing longer range but lower resolution, and higher frequencies offering higher resolution but shorter range, necessitating directional communication.
Innovation Solution
Utilizing a first frequency band for communication and a second higher frequency band for sensing measurements, where the bands are non-overlapping, with the first band below 7 GHz and the second band between 42 GHz and 71 GHz, enabling improved sensing resolution while maintaining communication capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a lower frequency band is used for sensing, then the communication range is extended, but the sensing resolution deteriorates
Solution Approach 1:
The patent segments the sensing system into two separate frequency bands: a first frequency band (below 7 GHz) for communication and control messages, and a second frequency band (42-71 GHz) for sensing measurements. This segmentation allows each band to be optimized for its specific function, resolving the contradiction between range and resolution.
Solution Approach 2:
The patent introduces a dimensional separation by using multiple frequency bands simultaneously. Instead of trading off range for resolution within a single band, the system adds a frequency dimension, allowing both long-range communication and high-resolution sensing to coexist without compromise.
2Measurement precision
If a higher frequency band is used for sensing, then the sensing resolution is improved, but the communication range deteriorates
Solution Approach 1:
The patent divides the electromagnetic spectrum into two non-overlapping segments: the first frequency band (below 7 GHz) for reliable long-range communication and the second frequency band (42-71 GHz) for high-resolution sensing. This segmentation eliminates the need to choose between range and resolution.
Solution Approach 2:
The first frequency band acts as an intermediary for control and management functions, while the second frequency band handles sensing measurements. This intermediary approach allows the system to maintain communication reliability at lower frequencies while achieving high sensing resolution at higher frequencies.
3Device complexity
If a single frequency band is used for both communication and sensing, then the device complexity is reduced, but the performance optimization deteriorates
Solution Approach 1:
The patent implements multi-functionality by enabling the same device to operate on multiple frequency bands simultaneously. The device can use the first frequency band for communication and control, and the second frequency band for sensing, allowing one device to perform multiple optimized functions rather than requiring separate specialized devices.
Solution Approach 2:
The patent segments the functional operations into different frequency bands within a single device. This segmentation allows each function (communication and sensing) to be optimized independently while maintaining integration within the same device, balancing complexity with performance.
Data Source
AI summary
The present disclosure relates to devices for sensing applications, specifically, methods and modules wherein a first frequency band is used for communicating sensing measurements and a second frequency band is used for performing sensing functions and the second frequency band is higher than the first frequency band. The higher frequency of the second frequency band provides improved sensing function while the lower frequency of the first frequency provide improved communication characteristics. Methods and modules may relate to communications links of affiliated stations (STAs) of multi-link devices (MLDs).