We have installed N LoRaWAN sensors and M gateways. These sensors require an acknowledgment message from the network server. Communication is carried out every hour in SF9 on the 915 MHz band. If the acknowledgment is not received, the sensor switches to a degraded mode and then communicates K times more, in order to catch the signal from the gateway.
In order to try to solve this problem, we have tried to increase the density of the gateway network.
What is the number of Gateways to add?