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Wifi sensing turns a standard Wi-Fi network into a motion detection system. No cameras. No sensors. It works with the router already installed in the home.
At Alea Soluciones, we develop wifi sensing solutions alongside Huawei to help ISPs and telecoms operators offer smart home services without additional hardware investment.
What Is Wi-Fi Sensing
Wi-Fi Sensing detects movement and human presence by analysing variations in the Wi-Fi signal. It does not require physical sensors or cameras to do so.
When someone moves, their body alters the wireless signal. It absorbs it, reflects it and diffracts it. The router captures those variations and software interprets them in real time.
In other words, the router stops being just an access point. It becomes an intelligent sensor for the home.
How Wi-Fi Sensing Works
Wi-Fi Sensing analyses the Channel State Information (CSI). This parameter measures how the Wi-Fi signal propagates through space.
The process happens in four steps:
- The router continuously transmits the Wi-Fi signal
- The signal travels through the space, passing through walls and objects
- A person’s movement alters that signal
- Software analyses the CSI and generates a real-time alert
As a result, any compatible Wi-Fi network becomes a passive motion detection system. No blind spots. No need for direct line of sight.
Wi-Fi Sensing vs Traditional Motion Sensors
Traditional PIR sensors require physical installation and only detect within their direct field of view. Wifi sensing, on the other hand, covers the entire network and works through walls.
| Feature | Wi-Fi Sensing | PIR Sensor |
|---|---|---|
| Additional hardware | No | Yes |
| Coverage | Entire network | Direct line of sight |
| Installation | Via software | Physical |
| Fall detection | Yes | No |
| Deployment cost | Very low | Medium-high |
Wi-Fi Sensing Use Cases
Wi-Fi Sensing has concrete applications in both residential and professional environments. Here are the most relevant ones.
Home Security Without Cameras
The system detects intrusions or suspicious movements without installing cameras. Furthermore, the operator can activate this service remotely, with no technical visit to the property.
Care for Elderly People
Wi-Fi Sensing monitors daily activity without the user wearing any device. For that reason, it is especially useful for elderly people living alone. It detects prolonged immobility and changes in behavioural patterns.
Home Automation
The system enables automation based on people’s presence: lighting, climate control, and devices.
Energy Efficiency
By knowing which spaces are occupied in real time, the system automatically reduces energy consumption. This avoids wasting energy in empty areas without any action required from the user.
Professional Space Monitoring
WIn hotels, offices or coworking spaces, Wi-Fi Sensing provides real-time occupancy data. This allows operators to manage capacity, optimise resources and improve operational planning.
Benefits of Wi-Fi Sensing for ISPs and Operators
For ISPs, wifi sensing is an opportunity to generate recurring revenue on already-deployed infrastructure. These are its main benefits:
Higher ARPU. These services justify higher prices and improve margin per customer.
Lower churn. Users of value-added services show greater loyalty.
No hardware investment. The service is activated via software on the existing network.
Competitive differentiation. No major carrier offers Wi-Fi-enabled motion sensors on this scale and at this price point.
Wi-Fi Sensing and Privacy
A common question is whether wifi sensing compromises user privacy. The answer is no.
The system does not capture images. It does not record audio either. It only works with radio signal propagation data, which indicates whether there is movement, but not who is moving or what they are doing.
Frequently Asked Questions About Wi-Fi Sensing
Does wifi sensing require sensors or cameras? No. It works with the Wi-Fi router already installed in the home. No additional hardware is needed.
How does it detect movement through walls? The Wi-Fi signal passes through walls and changes when something moves within its coverage area. The system analyses those
Which operators can offer it? Any ISP with compatible Wi-Fi equipment can activate it via software. No infrastructure upgrade or technical visit is required.
What is the difference from a PIR sensor? A PIR sensor requires physical installation and only detects within its field of view. Wifi sensing covers the entire network, works through walls and detects more complex patterns such as falls.
The Next Step for Operators
Wifi sensing allows operators to transform connectivity into an advanced services platform. No new infrastructure. No additional hardware.
At Alea Soluciones, we work alongside Huawei to make this transition possible. If you want to know how to integrate wifi sensing into your offer as an operator, contact our team.
