Two IEEE 802.11 DCF stations A and B close to each other are sending frames to station C.

Assume: RTS/CTS are used.

Each station has 3 data frames available for transmission at time t = 0

A fourth station D completes a transmission at time t = 2.

Stations A and B pick their successive backoff intervals as follows:

Station A: 5, 4, 2, 11, 8

Station B: 3, 6, 7, 1, 4

Slot time = 1 SIFS time = 1 slot DIFS time = 3 slots

The size of each RTS, CTS, and ACK = 2 slots

The data size = 3 slots

No bit errors.

Show on a timing diagram the sequence of events that occur until each of A and B has received ACK for their first frame sent to C. Show one timeline for each of the stations A, B, and C. Show the various frames sent, backoff slots counted, and collisions (if any)