Feature #11: Weighted Exponential Back-off
Explore the concept of weighted exponential back-off to handle network transmission collisions. Understand how to represent back-off times using linked lists and implement an algorithm to sum these lists efficiently. This lesson helps you develop skills to simulate collision retry timing in networks with practical coding techniques and analyze time and space complexity.
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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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