Multiple Access with Collision Avoidance for Wireless: Difference between revisions

Revision as of 17:33, 9 April 2008

Revision as of 06:05, 13 May 2008

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Before sending a long DATA frame, node A sends a short Data-Sending frame (DS), which provides information about the length of the DATA frame. Every station that overhears this frame knows that the RTS/CTS exchange was successful. An overhearing station (node F), which might have received RTS and DS but not CTS, defers its transmissions until after the ACK frame should have been received plus a random time <ref name="MACAW"/>.

To sum up, a successful data transfer from A to B consists of the following sequence of frames:

# “Request To send” frame (RTS) from A to B

# “Clear To Send” frame (CTS) from B to A