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Talk:Carrier-sense multiple access with collision avoidance

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shamefully deleted my own comment. I was wrong. --Alvestrand 20:27, 18 January 2006 (UTC)[reply]

Exposed terminal

The hidden terminal problem was mentioned, but no word about the exposed terminal problem.

Doubt!!

Can a collission arise while sending a jamming signal?

As noted in the article, for radio systems there is often the possibility that the jamming signal or data transmission will not be detected by another radio, resulting in a collision. This is even more likely for mobile radio systems where often the radio path to another radio may be blocked by terrain effects.--Rjstott 06:59, 3 July 2006 (UTC)[reply]

CSMA/CA does not use RTS/CTS

The article incorrectly states that CSMA/CA uses RTS/CTS. That is an improvement in the MACA protocol and is optional in 802.11 protocol.

Jamming signals

It says in the "Usage" sub-heading: Apple's LocalTalk implemented CSMA/CA on an electrical bus using a three-byte jamming signal

What exactly is this jamming signal? Isnt jamming signal sent when a collision is detected in the network to warn the other hosts connected to the CSMA network about the collision? If so, doesnt this make it CSMA/CD rather than CSMA/CA? —Preceding unsigned comment added by 137.132.3.6 (talk) 02:29, 22 September 2007 (UTC)[reply]

I found the answer to these questions here: http://en.wikipedia.org/wiki/Jam_signal Please feel free to delete this post if you are an authorized user (I am not really familiar with the system). —Preceding unsigned comment added by 137.132.3.12 (talk) 10:47, 25 September 2007 (UTC)[reply]

  • Answer to your question: collisions can occur in CSMA/CA when two nodes start sending at the same time.

Station Checking

It says the station "checks to see if the channel is still free". Does anyone know exactly how it does this? I can't find anywhere how the station actually checks whether the line is busy. A voltage signal would run into the same collision problems. Anyone know? —Preceding unsigned comment added by 203.38.189.98 (talk) 02:18, 13 June 2008 (UTC) 02:40, 13 June 2008 (UTC)[reply]

I'd like to know this as well. Could the client possible just send the signal that the station senses ahead of the packet? –Sigmarz talk • edits 10:27, 23 June 2008 (UTC)[reply]

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