Can radio frequencies operation in full duplex mode?

Can radio frequencies operation in full duplex mode?
My question is based on the following text: "In a network where WMM is supported by both the access point and the client device, traffic generated by time-sensitive applications such as voice or video can be prioritized for transmission on the half-duplex RF medium. "
MAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

nociSoftware EngineerCommented:
Yes and No....

Within one channel it cannot (and neighbouring channels may bleed.(cross-talk)..).

When there are separate carrier channels available for Sending/Receiving... then full duplex can be done (and in fact is done).
(Same holds for cables, they have 2 lead-pairs, one for sending and one for receiving).
Dave BaldwinFixer of ProblemsCommented:
If you are talking about standard WiFi connections, it is a polled network with half-duplex operation.
nociSoftware EngineerCommented:
That is because of the use of only one channel per AP.  If you COULD connect with AP-> mobile with Channel 1 and Mobile -> AP with channel 5 then it can be full duplex.  (so it requires A transmitter & receiver that are tuned to different channels on BOTH sides.
With standard WiFi communication between  AP<-> Mobile using only one channel.  And both sides only have one send/receiver unit so switching roles from sender -> receiver -> sender ... makes it Half Duplex.  If both are sending at the same time the interference would destroy any signal for any other party.

It might be worthwile to study the case of the ALOHA network, wich eventualy became Ethernet. (Ethernet at start was a Wired equivalent to a radio packet network called ALOHA, using COAX-cable to connect stations. This later became Bridges & Repeaters, then Multiport Repeaters  which eventualy became Hubs. Then UTP was introduced and The Hubs became Switches, from the 100Mbps networks standards onward Full Duplex became available, some manufacturers backported it to 10Mbps as well).

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Nadir ALTINBASe e engr.Commented:
wireless multi media  communication  in full duplex mode future research topic. in the mean time,Multi-Input Multi-Output
 (M I M O),Orthogonal Frequency Division Multiplexing  (O F D M) is possible solution for  nowadays.
OK?
MAuthor Commented:
Thank you all.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Networking

From novice to tech pro — start learning today.