The data interval of amnimo sense sometimes doesn't go along with the transmission interval.
When an Endpoint device fails to send data, its transmission interval will be changed.
It's for prevention of the collision to the devices.
【 example 】
- Transmission interval: 1 hour
- Retry occurs at 2:00:00
Retry occurs at 6:00:00
The data transmission is performed as following.*
0:00:00 1:00:00 2:00:10 3:00:10 4:00:10 5:00:10 6:00:20 7:00:20 8:00:20
When the data transmission fails, the transmission interval is changed.
*In the example above, the transmission interval is changed 10 seconds every time the Retry occurs.
Actual time is depends on the Retry times and Retry interval.
Retry time = Retry times × Retry interval ( 5-15 sec )