Question

One hundred stations on a pure aloha network share a 1-mbps channel. If frames are 1000 bits long, find the throughput if each station is sending 10 frames per second.

Answer 1

Answer:

13.53 percent

Explanation:

We can first calculate Tfr and G, and then the throughput. Tfr = (1000 bits) / 1 Mbps = 1 ms

G = ns × nfs × Tfr = 100 × 10 × 1 ms = 1

For pure ALOHA → S = G × e−2G ≈ 13.53 percent.

This means that each station can successfully send only 1.35 frames per second.