Full Duplex Coming to to Wireless

Forums › LAN (ethernet/Wifi/routers/Bluetooth) › Full Duplex Coming to to Wireless

Dairyxox

1594 posts

Uber Geek

#168547 17-Mar-2015 21:14

New Radio IC Technology may double the data capacity of wireless devices

This seems to be some real innovation after recent technology advancements have been more brute force (merely increasing the spectrum of frequency used.)
In theory it could double the bandwidth of existing frequency use. The best news in wifi in a long time.

I like the analogy, "like trying to listen to someone whisper while yelling at someone else"

Dairyxox

1594 posts

Uber Geek

#1261936 18-Mar-2015 20:23

Nobody cares?
Maybe have an effect on latency too, since the radio no longer has to take turns to switch between sending, then receiving.

tdgeek

29745 posts

Uber Geek

Trusted

Lifetime subscriber

#1261943 18-Mar-2015 20:30

Great. BUT, I'd wait for Steve Biddles's comment. Wifi is not an unlimited resource, I would doubt that full duplex will be "free", there will be a cost, of perhaps latency, real world speed, somewhere along the line

Dairyxox

1594 posts

Uber Geek

#1261944 18-Mar-2015 20:33

I guess it will cost energy (Watts) for the incorporated logic, and in dealing with more bits. It must also cost $$ as these advances are business for someone.

tdgeek

29745 posts

Uber Geek

Trusted

Lifetime subscriber

#1261947 18-Mar-2015 20:44

My cost comment was opportunity cost, not financial. We went from G to N, to AC, a lot of speed there. If full duplex was that easy, we would have it now?

Dairyxox

1594 posts

Uber Geek

#1261988 18-Mar-2015 21:38

Thats the point though, it wasn't easy.
Those advances were, and they were' brute force'. This one is the real innovation.

jjnz1

1358 posts

Uber Geek

Lifetime subscriber

#1261994 18-Mar-2015 21:50

Wow, this could have major benefits in severely populated city areas where frequency (and capacity) is at a premium.

I wouldn't put my house on it until I could see actual products that use this tech though.

raytaylor

4014 posts

Uber Geek

Trusted

#1262192 19-Mar-2015 10:22

Full duplex, even if the uplink isnt that fast, will make a huge difference.
It would basically eliminate hidden node issues or collision collapse if they could pair it with TDMA right from version 1 out of the box.

So I would find acceptable if the system used a 20mhz downlink channel to get ~108mbit and a 5mhz uplink to get ~40mbit or even 20mbit in a single chain. That way acknowledgement packets could be returned faster, and the AP can be streaming more data faster without needing to wait as long for acknowledgements.

Over a short distance however, the acknowledgements come back pretty quick so in terms of TCP, it wouldnt make too much difference.

Ray Taylor

There is no place like localhost

Spreadsheet for Comparing Electricity Plans Here

Equinox IT

Cloud spending continues to surge globally, but most organisations haven’t made the changes necessary to maximise the value and cost-efficiency benefits of their cloud investments. Download the whitepaper From Overspend to Advantage now.

sbiddle

30853 posts

Uber Geek

Retired Mod

Trusted

Biddle Corp

Lifetime subscriber

#1262201 19-Mar-2015 10:33

jjnz1: Wow, this could have major benefits in severely populated city areas where frequency (and capacity) is at a premium.

I wouldn't put my house on it until I could see actual products that use this tech though.

It's worth remembering this topic is really "full duplex coming to 802.11 WiFi". Full duplex wireless exists, and has done for a long time. Typically it's protocols that are FDD rather than TDD.

eXDee

4032 posts

Uber Geek

Trusted

#1262346 19-Mar-2015 12:36

sbiddle:
jjnz1: Wow, this could have major benefits in severely populated city areas where frequency (and capacity) is at a premium.

I wouldn't put my house on it until I could see actual products that use this tech though.

It's worth remembering this topic is really "full duplex coming to 802.11 WiFi". Full duplex wireless exists, and has done for a long time. Typically it's protocols that are FDD rather than TDD.

Expanding on this with an example of a brand that some people may commonly know, Ubiquiti Airfiber is an example of a point to point FDD capable full duplex solution.

https://www.ubnt.com/airfiber/airfiber/