Frequency Resource Allocation for Multipath-Aware Wireless Sensing
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Solution Overview
Problem
Existing wireless sensing technologies fail to detect movements that do not cause detectable variations in the propagation channel between a sensing transmitter and a receiver.
Innovation Solution
Allocate frequency domain resources based on the multipath spread of the radio channel, determining a sensing frequency range and allocating contiguous or non-contiguous frequency domain resources to improve movement detection probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wireless sensing methods are used, then the system is simple to operate, but movement detection probability is low because movements causing undetectable channel variations are missed
Solution Approach 1:
The patent changes the parameter of frequency resource allocation by determining a sensing frequency range based on multipath spread characteristics and allocating frequency domain resources accordingly. This parameter change enables detection of movements that cause undetectable variations in traditional single-frequency sensing, thereby improving movement detection probability while managing system complexity through structured resource allocation
Solution Approach 2:
The patent transitions from single-frequency sensing to multi-frequency sensing by allocating frequency domain resources across a determined sensing frequency range. This dimensional expansion into the frequency domain allows the system to detect movements through frequency-selective fading patterns that are invisible at single frequencies, improving detection reliability
2Reliability
If frequency domain resources are allocated based on multipath spread analysis, then movement detection probability improves, but resource allocation complexity increases
Solution Approach 1:
The patent performs preliminary action by determining the sensing frequency range based on multipath spread characteristics before allocating frequency domain resources. This advance preparation creates a structured allocation framework that improves detection probability while simplifying the actual resource allocation process through pre-determined frequency ranges
Solution Approach 2:
The system performs self-service by automatically determining the sensing frequency range based on measured multipath spread characteristics and autonomously allocating frequency domain resources without requiring manual configuration. This self-optimizing behavior improves detection probability while maintaining ease of operation through automated resource management
Data Source
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AI summary
A method is disclosed for allocating frequency domain resources for wireless sensing of a radio channel associated with a sensing device. The method comprises determining a sensing frequency range for the sensing device based on a frequency selectivity of the radio channel, and allocating frequency domain resources for the sensing device at least in part based on the determined sensing frequency range. For example, a first sensing frequency range determined for a first frequency selectivity may be larger than a second sensing frequency range determined for a second frequency selectivity when the first frequency selectivity is higher than the second frequency selectivity. The frequency selectivity may be parameterized based on one or more of: a number of propagation paths of the radio channel, a time dispersiveness of the channel, an impulse response of the channel, a power delay profile of the channel, a delay spread of the channel, a root mean square delay spread of the channel, a frequency response of the channel, and a coherence bandwidth of the channel. The sensing frequency range may comprise a sensing bandwidth and/or a sensing frequency spread. Corresponding apparatus, scheduler, network node, and computer program product are also disclosed.