LoRaWAN end devices have to cope with 2 different types of network connectivity issues:
The device temporarily loses network connectivity.
This can happen in the following example cases:
There is no network coverage at the current location of a moving device
There is a temporary network outage at the area of a fixed device. (e.g.: the LoRaWAN Gateway that ...
Here is the detailed behavior for Abeeway brand trackers.
Network timeout monitoring
Not receiving any downlink communication from the network is a serious symptom. It can mean that the tracker became isolated from the network, in no longer active in this network, or potentially that the device LoRa radio (or the MCU driver for it) has become unstable.
LoRaWAN's ADR has a relative long convergence time, because the network server needs to collect data (SNR, packet error rate, etc.) from several uplink messages before it could calculate the ideal data rate and packet repetition parameters. For example: if a device sends UL messages in every 2 min and the NS needs 10 UL messages to calculate the packet error ...