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Authors:
James F. Kurose, Keith W. Ross
Chapter:
Wireless And Mobile Networks
Exercise:
Review
Question:10 | ISBN:9780132856201 | Edition: 6

Question

Suppose the IEEE 802.11 RTS and CTS frames were as long as the standard DATA and ACK frames. Would there be any advantage to using the CTS and RTS frames? Why or why not?

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Answer

No, there wouldn’t be any advantage.  Suppose there are two stations that want to transmitat the sometime and they both use RTS/CTS.If the RTS frame is as long as a DATA frames, the channel would be wasted for as long as it would have been wasted fortwo colliding DATA frames. Thus, the RTS/CTS exchange is only useful when the RTS/CTS frames are significantly smaller than the DATA frames.

 

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