In the first process, Node 3 decreases the back-off time.
The initial value of the back-off time is randomly chosen from between 0 and Contention Window (CW).
When the channel is idle, Node 3 decreases the back-off time.
Otherwise, Node 3 does not reduce the back-off time.
If the back-off time reaches 0, Node 3 starts RTS transmission.
Then, Node 2 (non-receiver) and Node 4 (receiver), which are within the transmission range of Node 3, receive the RTS frame from Node 3.
If Node 4 receives the RTS frame successfully, it transmits the CTS frame after waiting for the Short Inter Frame Space (SIFS) period.
Then, Node 3 and Node 5 (non-receiver), which are within the transmission range of Node 4 receive the CTS frame.
Node 3 confirms the successful RTS transmission by receiving the CTS frame from Node 4.
In the first process, Node 3 decreases the back-off time.The initial value of the back-off time is randomly chosen from between 0 and Contention Window (CW). When the channel is idle, Node 3 decreases the back-off time. Otherwise, Node 3 does not reduce the back-off time. If the back-off time reaches 0, Node 3 starts RTS transmission. Then, Node 2 (non-receiver) and Node 4 (receiver), which are within the transmission range of Node 3, receive the RTS frame from Node 3. If Node 4 receives the RTS frame successfully, it transmits the CTS frame after waiting for the Short Inter Frame Space (SIFS) period. Then, Node 3 and Node 5 (non-receiver), which are within the transmission range of Node 4 receive the CTS frame. Node 3 confirms the successful RTS transmission by receiving the CTS frame from Node 4.
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