Topic

ALOHA

2 questions in this topic.

2014 Q4(g)Link LayerALOHA· 8 marks

Given that lim_{N→∞} (1 − 1/N)^N = 1/e, derive the maximum efficiency of slotted ALOHA.

medium accessefficiency

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2015 Q5(a)Link LayerALOHA· 4 marks

Pure Aloha (sender may start transmission during any time) has a maximum efficiency that is half that of Slotted Aloha (sender can only start transmission at synchronised time slots). Explain in detail why Pure Aloha is only able to achieve half the efficiency.

medium accesscollision

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