Feature #11: Weighted Exponential Back-off
Understand how weighted exponential back-off works in network protocols to prevent collisions by backing off transmitting devices for variable time slots. Learn to model this concept with linked lists and implement an algorithm that sums these delays accurately, improving network congestion handling.
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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 time slots. In case of successive retransmission failures, the device backs off for time slots, where r is a random integer between 1 and 9.
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