802.11 listen for collision while transmitting?

I was reading a paper titled "IEEE 802.11 Wireles Local Area Networks" by Crow et al., published by in IEEE Communications Magazine and in it the authors state: "The DCF is based on carrier sense multiple access with collision avoidance (CSMA/CD). CSMA/CD (collision detection) is not used because a station is unable to listen to the channel for collisions while transmitting."

Why is this the case? Why can a station not listen to channel for collisions while transmitting?

Is it that they are physically unable to or is that the physical medium available to the station does not provide a sufficiently clear indication of a collision?

Just curious,

Ben

Reply to
Benjamin M. Stocks
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Reply to
Garak

Okay, makes sense.

Thanks!

Ben

Reply to
Benjamin M. Stocks

Because the receiver will be overloaded when the transmitter is active.

Reply to
William P.N. Smith

This is known as the Near Far problem.

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Regards, Allan

Reply to
Allan Herriman

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