Feature #11: Weighted Exponential Back-off
Explore the concept of weighted exponential back-off in network communication where devices manage data collisions by waiting for variable time slots determined by random numbers. This lesson teaches you to simulate the total back-off time by adding numbers represented as linked lists, managing carry-over just like manual addition, and understanding the algorithm's time and space complexity.
We'll cover the following...
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 ...