802.11 listen for collision while transmitting?

Mar 01, 2006 4 Replies

First reply

Garak

The transmitter overpowers the reciver, the reciver will get so much of the signal that it will have to drop the gain and it will not pickup signals from any other sources. From the recivers point of view there is no collision, but their may be one from the point of view of…

Read the full reply
B

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



Vote
Twitter Facebook LinkedIn
W

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

Vote
Twitter Facebook LinkedIn
A

This is known as the Near Far problem.

formatting link
Regards, Allan

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required