Question $1$: Why does the waiting time to retransmit must be random?

Question $2$: A snapshot of a possible traffic generated from $5$ stations is shown below in Figure

$2,$ identify the packets that are undergoing interference.

Figure $2$ Traffic generated by $5$ stations

Slotted ALOHA

As we saw in the lecture the throughput of pure ALOHA is quite low. Thus, slotted ALOHA

was introduced to increase the throughput. The slotted approach requires the users to agree on

slot boundaries. One way to achieve synchronization would be to have one special station emit

a tick at the start of each interval, like a clock. The throughput of slotted ALOHA is given by$,$

$,$

where the throughput $$ is measured in $[$successful packets $/$ packet$-$interval$].$ The loading $$

represent the intensity of the total traffic $($successful and corrupted$)$ arriving at the central

computer measured in $[$packets $/$ packet$-$interval$].$