Question: Based on Figure 12.15, how do we interpret success in an Aloha network? Figure 12.15 Station has a frame to send K= 0 Legend K:

Based on Figure 12.15, how do we interpret success in an Aloha network?

Figure 12.15

Station has a frame to send K= 0 Legend K: Number of attempts Tg: Backoff time IFS: Interframe Space RTS: Request to sen

Station has a frame to send K= 0 Legend K: Number of attempts Tg: Backoff time IFS: Interframe Space RTS: Request to send CTS: Clear to send Channel free? [false] [true] Carrier sense Wait IFS Choose a random number R between 0 and 2* 1 and use the Rth slot Contention window Send RTS Wait Tg seconds Set a timer CTS received before time-out? [false] (true] Wait IFS Send Transmission the frame Set a timer [false] [true] ACK received before time-out? K < limit ? K= K +1 [ Itrue] [false] Abort Success

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