College to Deploy First 802.11n Network 90
Matt writes "Morrisville State College, a New York State school in central New York, is partnering with Meru Networks and IBM to deploy the first 802.11n wireless network. They will be using around 900 access points and are planning to go live this fall."
They came from 2 mbit (Score:5, Informative)
They have nearly filled the alphabet btw. Only 802.11z is still free as a name. Can you name them all ? http://en.wikipedia.org/wiki/802.11n#Standard_and
Re:54mbps? (Score:3, Informative)
Re:remember 33k? (Score:4, Informative)
1.25 megabytes. Remember that a generic S-ATA or IDE hard disk writes at about 5-6MB/s and that can be a big bottlencek most of the time. So the 54Mbps connection you speak of is a total speed of ~7MB/s. That's not the internet speed. That's the LAN connection. So one person tries to send a large file to another on the network and all of a sudden we've hit that bottleneck and no one can even check their email.
Although some of these numbers sound impressive realistically for daily LAN usage they are just about usable.
More about SUNY Morrisville (Score:2, Informative)
Exactly-it isn't the first 801.11n! (Score:1, Informative)
Re:Not necessarily... (Score:5, Informative)
The actual transfer rate is reduced from the optimum by the packetising of the data, obtaining the wireless spectrum before transmission and that an inter-packet gap is inserted between every transmitted packet to allow other AP users to transmit data.
Re:Pioneers? Sure, but.... (Score:3, Informative)
No, Not free. There was a $600 a semester line item on my bill over 4 semesters. Students are buying a laptop for $2400. Oh, and if you drop out after the third semester, you had to pay the last $600 or give it back. The school doesn't pay anything for the laptops. The cost goes right to the tuition.
On the otherhand, in fall 2002 when I was issued my Thinkpad T-30, there was no more powerful laptop on the market, and $2400 was slightly below market prices for that particular piece of equipment.
Re:remember 33k? (Score:2, Informative)
Re:802.11n draft for live? (Score:4, Informative)
Re:Exactly-it isn't the first 801.11n! (Score:3, Informative)
Re:I doubt this is the first 802.11network... (Score:2, Informative)
802.11n hasn't been ratified yet, there's no such thing as an 802.11n network at the moment.
Currently expected in september 2008
http://grouper.ieee.org/groups/802/11/Reports/802
It will be a while before someone rolls out the first 802.11n network.
TTB
Re:remember 33k? (Score:3, Informative)
Nope, hard disk speeds are quoted in MB/sec, not Mbps. You're a factor of 8 out - 40-50MB/sec is more like it (and modern desktop drives are a bit faster than that).
You've never actually used a network somebody else is using, have you? Suggesting that when one user saturates the network nobody else can even check their email is quite simply wrong. Every shared networking technology in use today shares the bandwidth out pretty fairly and with modest overhead for a reasonable number of clients. You can reach a stage where there are so many clients simultaneously using bandwidth that overall throughput suffers, but it takes a damn sight more than one person sending one file to do it. I saturate my 54Mbps Wi-Fi connection every time I back up my laptop and not only can everybody else on the network (often me using another machine) check their email, they can stream hi-def content from the interwebs, send huge files and do pretty much anything else they'd normally do too. With at most half a dozen or so clients on my AP I've never seen overall throughput drop, the bandwidth just gets shared out fairly between the clients. If two try to send big files, of course they only get half the bandwidth each, but it still works just fine. With 100 clients doing P2P it would be a different matter.
Re:Not necessarily... (Score:5, Informative)
Under
One thing to keep in mind in all of this is that in many cases, the uplink on a switch to the rest of the network is only 100Mbps, so the final throughput from what people are used to isn't going to decrease all that much. Factor in several APs with a balanced channel setup with a gigabit uplink, and the experience shouldn't be all that different from what the wired people are experiencing.
Re:remember 33k? (Score:3, Informative)
The modem's encoding a byte with 10 bits would be at layer 1.
Over that, you'd have Ethernet, with its own overhead (the 14+4 bytes you mentioned), PPP, etc, at layer 2.
Over that, you have IP, with a 20 byte header, layer 3
And over that, you have TCP, with a 32 byte header, layer 4.
Not to mention that those 1500 byte packets are only 1500 bytes when transferring large amounts of data. Something with small packets like SSH gets more overhead.