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HelicopterOff Topics › Wirless N MIMO Technology
01-23-2007 05:06 AM  10 years agoPost 1
TRex4life

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Phoenix AZ

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Well we were talking about new wirless technologies today in class, and came across the new N standard, which hasn't yet been approved by IEEE yet.

We are curious, is N using a N router and a bunch of G routers as backbones, or how exactly is it transmitting data? If I am to understand it correctly it can utalize multiple channels and signals at once instead of just single in and out, but can a N router do this with G wirless cards and other G Routers?

Thanks,

Edwin

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01-25-2007 04:55 PM  10 years agoPost 2
TRex4life

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Bump?

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01-25-2007 10:08 PM  10 years agoPost 3
Jawbone44

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802.11n MIMO (Multiple In Multiple Out) Basicly uses more than one antenna to accomplish the wireless equivalent of Full-Duplex over the wire technology. Basicly you are going from having one antenna that can talk and then listen. To being able to talk and listen at the same time. Thus doubling data rates.

This requires a whole frequency set unto itself. So there isn't any backward compatiblillity with the other standards unless you decide to broadcast in that frequency range. What is more likely, is that you will see several radio's incorporated into the same device to accomodate the older equipment until obsolesance takes care of the rest.

P.S. These devices aren't routers. They are access points. Sometimes manufacturers like Linksys will integrate a product like an access point with a router, but they are still two seperate devices in the OSI model.

"Some problems don't have solutions, only outcomes" --Isaac Asimov

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01-26-2007 07:35 AM  10 years agoPost 4
TRex4life

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Well according to all the sites, it will improve previous versions, a/b/g and make them work better and will be backwards compatible with all.

I'm curious as to the access points having to be N also, or would it even matter, like does the main unit have to be a mimo and your access points could be anything and be just as effective.

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01-26-2007 04:26 PM  10 years agoPost 5
Jawbone44

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I think you will just see less intrest in the older technology. That's usually the way this kind of thing goes. Technically, in a wired connection, you can still use your old 10Base-T card even though you are connecting through a gigabit capable switch. But why would you want to? I think over the next 18 months you will see 802.11b almost completely drop off the map. And in the next two to two and half years you will see fewer and fewer companies supporting the technology at all. A and G may still be around for a while, but you will start to see the integration of A and G devices start to fall out of favor.

If you are talking about point to point/multipoint wireless, I doubt there will be the same backward compatibility. A wireless bridge is a completely different animal from an Ad-Hoc/Infrastructure connection and requires its own protocol suite that is usually native to the manufacturer of the devices you are using. For example, I have two devices from the same manufacturer. One new and one old, both are capable of point to point wireless over 802.11b, but the newer one will communicate over 802.11a/b/g. Yet they are not backward compatible because the manufacturer decided to change the bridging programing to make it more efficient and all the firmware updates in the world won't solve the problem.

"Some problems don't have solutions, only outcomes" --Isaac Asimov

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