Talk:Carrier sense multiple access
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[edit] Restructuring of CMSA, CMSA/CD, CMSA/CA Pages (1 Nov 2003)
There was already a minimal CSMA article in place. Since CSMA/CD and CSMA/CA are both variants of CSMA, I moved detailed discussion of the fundamental algorithm into the CSMA article, and restructured CSMA/CD to describe the value it adds to CSMA. I plan to do the same for CSMA/CA. I also added a ghost link in the CSMA article for MAC.
[edit] Need to add: Deterministic CSMA/CA
I know there exists another type of CSMA/CA that is entirely deterministic, ie that cannot lead to collision even if both ends speak at exactly the same time. It is used in some field networks, I cant remember which ones. I dont know enough of it, nor am i able to cite sources, so I describe it here hoping somebody will modify the article for me. thanks in advance to the one who will.
The principle is roughly: anybody wanting to speak first broadcasts its own address with '0' bits being recessive (much like tri-stated bits) on the medium; and re-reads its own address. If it reads something else than its address, it immediately stops and retries after the end of packet. This means the equipment with "11111.." address is able to speak whenever it wants to, and others follow, the highest address having the highest priority.
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- - Ppchailley 16:59, 4 July 2006 (UTC)
In fact it does exist and is only one form of CSMA/BA. There is a paragraph about it right now. It may still need an example, though... 84.101.111.34 08:10, 5 July 2006 (UTC)
