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Taxonomy of multiple$-$access protocols

Figure $12\mathrm{.}2$ Taxonomy of multiple$-$access protocols discussed in this chapter

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Slotted ALOHA

Time is divided into slots equal to a frame transmission time $(T_{fr})$ seconds.

A station can transmit at the beginning of a slot only.

If a station misses the beginning of a slot, it has to wait until the beginning of the next time slot.

A central clock or station informs all stations about the start of each slot.

Maximum channel utilization $($Throughput$)$ is $37\%$