Poster: fast and reliable alert delivery in Wi-Fi HaLow sensor networks

Rapidly evolving, the Internet of Things poses new challenges for the developers of wireless networks. Various industrial automation, agriculture monitoring, and smart cities scenarios require fast and reliable alert delivery. In many systems, multiple sensors are entrusted to react to the same emergency event. Thus it is enough to receive an alert message from any of these sensors. However, such a message shall be reliably delivered as soon as possible. Recently published Wi-Fi HaLow standard defines the Restricted Access Window (RAW) mechanism that coordinates transmissions of numerous devices and thus can improve reliability and reduce delay. The paper proposes an approach for alert delivery with RAW and investigates how to select optimal RAW parameters, i.e. those parameters that minimize channel time consumption while providing satisfactory reliability and delay for the alert delivery.