To understand the uses of K in Figure 12.15, find the probability that a station can send
Question:
Figure 12.15
a. After two failures.
b. After five failures.
Transcribed Image Text:
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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