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Contention Free Polling support

Posted: Sat Nov 19, 2005 6:43 pm
by DirectWireless
I was reading about a AP mode that some wireless chipsets support called PCF (Polling Coordination Function). It describes a mode that is a polling contention free mode that only some chipsets support (Atheros but not Prism). It sounds to me like a good physical layer solution for WISPs to eliminate hidden node and increase possible VOIP performance using Mikrotik. It also sounds like it would greatly improve interference against other 802.11b/g systems since it won't wait to transmit.

Any idea if it can be supported in a future release (if it's not already incorporated into NStreme)?

Re: Contention Free Polling support

Posted: Sun Jun 12, 2016 6:39 pm
by lz1dsb
That's a pretty old post. I'm going through a classic book on wireless "802.11 Wireless Networks: The Definitive Guide, 2nd Edition" and I read about this function. I didn't even know that such an option exists. Though the book is old, I don't know what happened with the PCF eventually... It would be interesting if someone could share more details on this...

Re: Contention Free Polling support

Posted: Sun Jun 12, 2016 8:26 pm
by directconnect
I'm not sure exactly what happened to it I'm the original poster (forgot about this account actually).

Here's some info, it appears it's part of the 802.11e QOS standard. https://en.m.wikipedia.org/wiki/IEEE_802.11e-2005

Re: Contention Free Polling support

Posted: Wed Jun 22, 2016 12:34 pm
by lz1dsb
I'm not sure exactly what happened to it  I'm the original poster (forgot about this account actually).

Here's some info,  it appears it's part of the 802.11e QOS standard.   https://en.m.wikipedia.org/wiki/IEEE_802.11e-2005
That is interesting. It is interesting that the AP could control the multi access of the different clients. It looks to me pretty much like the Token Ring's token.
I could assume than that it's not being implemented in MikroTik devices :)