Feature #11: Weighted Exponential Back-off

Description

In our network topology, we have a shared communication channel. On this channel, all the connected devices can simultaneously transmit data, resulting in a collision. The transmission is time-slotted. After a collision, the transmitting devices back off, that is, they refrain from retransmitting for a random number of time slots.

To this end, the device draws a random integer, r, between 1 and 9 and waits for as many time slots. In case of another collision on the first retry, the device draws a random integer again, r, between 1 and 9, and waits for $10*r$ time slots. In case of $[i]$ successive retransmission failures, the device backs off for $10^i*r$ time slots, where r is a random integer between 1 and 9.

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