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Wireless Everything at Dartmouth

hende_jman writes "Dartmouth College in Hanover, New Hampshire is condensing its phone, cable TV, and Internet services all into Wi-Fi, as reported by the New York Times (free registration required). The project, which started in 2001, has added 1400 WAPs and 24,000 wired ports. All that, and cost effective too."

26 of 187 comments (clear)

  1. Everything? by garcia · · Score: 4, Funny

    Those poor Dartmouth students... The future is here!

    Lenina Huxley: I was wondering if you would like to have sex?
    John Spartan: With you? Here? Now?
    [Lenina nods]
    John Spartan: Oh, yeah.

    [after futuristic, contact-free "sex"]
    John Spartan: I was thinkin' we could do it the old-fashioned way.
    Lenina Huxley: You mean... *fluid transfer*?


    Even though contact-free "sex" sounds lame I'm sure wireless beer would be something to rave about!

    1. Re:Everything? by xCepheus · · Score: 5, Funny

      Even though it'd be contact free most /.'rs still probably wouldn't be able to get it.

      *ducks*

    2. Re:Everything? by caryw · · Score: 5, Interesting

      Are they forgetting that these 11Mbps or 54Mbps speeds are the aggregate total for an access point? I hope not.
      Also, if you get a powerful enough microwave or something else that transmits in that 2.4Ghz wavelength it should be fairly easy to bring down the entire campus "phone, cable TV, and Internet services."
      Sounds like fun.
      --
      Fairfax Underground: Local discussion forums for residents of Fairfax County, VA

    3. Re:Everything? by CyberDave · · Score: 4, Insightful

      Not to mention that that aggregate bandwidth of 11 Mbps or 54 Mbps is the bandwidth provided at the raw physical layer. Even when you get to layer 2, you lose a lot of that bandwidth due to all ACKs at the MAC layer, the various timers (inter-frame delays). Then add on top of that the retransmission of lots frames due to interference and you're down to less than 10 Mbps of bandwidth. I've seen data from Vivato that indicates that you get even less than that (around 5 Mbps) in real-world conditions on a 802.11g network. That's about 10% usable bandwidth. Shared. That's not nearly enough. That's enough for maybe one TV channel and nothing else. And don't get me started on the latency...

    4. Re:Everything? by NoMoreNicksLeft · · Score: 3, Interesting

      Not-quite-so-dumb-question:

      Would wired gigabit be enough for a decent cable tv selection, assuming you were competent to set up the multicasting correctly? And how much bandwidth would it eat up per channel, and what kind of video might you get?

      Is it truly enough bandwidth that you could consider wasting a bunch of it on say, a basic cable setup?

    5. Re:Everything? by CyberDave · · Score: 5, Informative

      Yes, if the multicasting is done correctly.

      The short answer is that you don't actually have to multicast all twelve billion (slight exageration) channels simultaneously all the way to the set top boxes, just whatever 12 channels the people on the LAN are using (looking at this from the POV of a residential cable system based on Gig-E fiber to the home). If this is done inteligently, you can multicast only those channels being viewed and use IGMP snooping to figure out what to start multicasting from the cable head end. Depending on the exact network configuration (PON, active, etc), the multicast pruning might be done in the network, in the CPE, etc.

      As for bandwidth, yes, it does matter what codec you use, but MPEG-2 for standard resolution TV is 4-6 MB/sec (IIRC). HDTV is another matter entirely, as it's huge (especially when uncompressed).

      I'd write more, but it's time for lunch.

    6. Re:Everything? by NoMoreNicksLeft · · Score: 4, Informative

      The copper is actually short, less than a mile, less than 1000ft in many cases. They use HFC, hybrid fiber/coax. It's fiber nearly until it gets to you. What's more, it's heavily insulated/shielded coax, and has alot more bandwidth than the standard telco loop.

      Contrast this with a telco loop which can be 5+ miles of unshielded copper.

  2. Wireless TV? by Anonymous Coward · · Score: 5, Funny

    What will those crazy kids think of next? Wireless radio?

  3. Brilliant! by Thud457 · · Score: 4, Funny
    Wireless television ?!!!

    Brilliant! Brillant!

    --

    the preceding comment is my own and in no way reflects the opinion of the Joint Chiefs of Staff

  4. this seems dumb by eobanb · · Score: 5, Insightful

    Wireless purely for the sake of wireless is just a stupid idea. I'm assuming they pretty much already have most of the infrastructure they need. Don't the dorms and offices and classrooms already have phone lines??? Also, the bandwidth of Wi-Fi is puny compared to gigE, which is what is required for some on-campus applications like streaming video (I'm a student at IU and we do things like that sometimes). Plus there's the whole security problem. This just seems like one big joke...

    --

    Take off every sig. For great justice.

    1. Re:this seems dumb by maw · · Score: 3, Informative
      It is stupid.

      The simple fact is that today, in 2005, wireless doesn't work well at all. In the cases where it does work well, check how close the AP is. You'll see that it is so close that you might as well be using a cable anyway.

      --
      You're a suburbanite.
    2. Re:this seems dumb by gunnk · · Score: 4, Interesting

      It depends on what the network was like BEFORE the switch to wireless. If the buildings were all wired with Cat-3 cable to the wall port, why rewire with Cat-5 and then do it again in a very few years when you need fiber or some new Cat-X cable?

      Maybe wireless isn't as good as wired yet, but it isn't that bad either. The overall savings they may realize by no longer having to run new cables to every friggin wall port should more than make up for any cost now. When wifi improves, just swap out the access points.

      --
      Life is short: void the warranty.
    3. Re:this seems dumb by buelba · · Score: 3, Insightful

      >Wireless purely for the sake of wireless is just a stupid idea.

      There is an incredible convenience to wireless that you're omitting here. Just within my own house, I absolutely adore the ability to use my laptop in the office, kitchen, back yard, etc. This is *worlds* better than having to plug in.

      Multiplying this same convenience across a college campus -- to outdoor use, informal study groups in first-floor rooms, empty classrooms, etc. -- would be amazing. I wish I were 18 again.

  5. Wireless Everything! by Anonymous Coward · · Score: 3, Funny

    *24,000 wired ports rounded down to 0 for sake of discussion.

  6. Wireless Television by daved321 · · Score: 3, Funny

    Damn, wireless television... I can't beleive that this hasn't been done before...

  7. Karma Whoring by defore · · Score: 3, Informative

    TFA IT'S not that he doesn't like them or doubts his teaching ability, but Thomas H. Luxon, an English professor at Dartmouth College here, wants to see his students less next semester, hoping they will learn a lot more without having to look at him in a classroom. Professor Luxon, who teaches courses on Shakespeare, wishes they will instead be watching scenes from "The Merchant of Venice" or "Macbeth" on their PC's while sitting on a lawn, in a coffee shop or while relaxing in a dorm room. "That will be really cool," Professor Luxon said. "They could watch it on their own time and in their own place instead of having to go to the classroom or the media center. That means they could review it as often as they like, and they don't have to see it just once." Professor Luxon is able to release his students from the shackles of forced classroom movie viewing as a result of a major wireless convergence project that has taken Dartmouth's phone, cable and wireless systems and condensed them into one Wi-Fi network. The project, officials say, keeps students on the forefront of wireless technology, and opens up endless educational and teaching opportunities while saving the college millions of dollars. The switch, which started in 2001 and will be complete with the wireless cable rollout this fall, includes the addition of 1,400 wireless access points and 24,000 wired ports across the campus of the 236-year-old college, the first in the country to completely integrate its communications systems into a wireless infrastructure. "This really improves our ability to deliver types of information services that enhance teaching and learning," said Brad Noblet, Dartmouth's director of technical services. The first phase of the cable rollout will put the school's cable television system online. After that, students, professors and anyone else on the overall network will be able to make up his or her own "channel," showing movie clips, video projects or presentations with cable-quality video. The college's public affairs office hopes to have its own channel as well. It could also be used by students to shop for classes during course selection because they could view a few minutes of a lecture or discussion on the network, and by professors to provide discussion materials before class. Dartmouth also hopes to put all its public lectures and forums on a cable network instead of on the sometimes gritty streaming video now available. "We're really at the front end of this," said Jeffrey L. Horrell, dean of the libraries and librarian of the college. "It's not yet clear where the boundaries are." The new network could even change how students write papers. They will not replace words or writing, but might enhance, say, a paper on "The Merchant of Venice" with a clip of the actor Patrick Stewart explaining the method behind his portrayal of the character Shylock, said Professor Luxon, who teaches a course on the play. "Imagine writing a paper about one of these performances and including a video clip in your paper, like you would a quote," he said. "Now your paper isn't on paper anymore, it's on a Web site or a word file." The convergence project is meant for educational purposes, but it is not bad for entertainment, either. Students will be able to catch the latest episode of MTV's "Pimp My Ride" or any other television show anywhere on campus - including in class. While that is one more worry for professors who are now used to students staring at screens, they hope that the interaction and stimulation of a class will detract from the desire to tune in to "TRL" during sociology, Mr. Horrell said. Students, many of whom did not know about the new service, are enthusiastic. Jean Cowgill, 19, a freshman, hopes to use the network to watch materials outside of class. But, Ms. Cowgill said, the cable access might backfire. "That sounds amazing," she said. "But I don't know how great it will be for my study habits." Wireless data has been available here since 2001. Its success led the technology department to combine it with the college's

  8. Research Institutions by lake2112 · · Score: 3, Insightful

    Research based institutions like Dartmouth like to be the first to do things. The prestige of being completely wireless is not to provide convenience, but to allow them to be one of the first to do something.

  9. No, it's wireless CABLE TV by winkydink · · Score: 4, Insightful

    Now there's an oxymoron if I've ever seen one.

    --

    "I'd rather be a lightning rod than a seismometer." -Ken Kesey

  10. I'm not surprised with Dartmouth by pbooktebo · · Score: 4, Informative

    My brother went to Dartmouth in 1993, and they required everyone to have a computer as they already had campus-wide "blitz mail," which was used a bit like IM. All their assignments were handed in via email, class cancellations were broadcast that way, etc. Everyone was on it.

    Meanwhile, I was at Florida State in Tallahassee, where it wasn't until probably 1995 that you could even easily get a university email (we used to have to set up free city accounts at the public library, which we could then access from campus).

    I don't know that it made much of a difference in his education, but he loved the wow factor and I'm sure that's at play here, too.

  11. Let me get this straight by mattmentecky · · Score: 4, Insightful

    TFA:

    Hardware: Wireless Everything at Dartmouth Wireless Networking
    Posted by timothy on Wednesday May 04, @01:00PM
    from the breaking-ties dept.
    hende_jman writes "Dartmouth College in Hanover, New Hampshire is condensing its phone, cable TV, and Internet services all into Wi-Fi, as reported by the New York Times (free registration required). The project, which started in 2001, has added 1400 WAPs and 24,000 wired ports. All that, and cost effective too."

    Guess it depends what your definition of "wireless" and "everything" is.

  12. Single Point of Failure by RealProgrammer · · Score: 3, Funny

    What if someone is digging a hole through the air and cuts their wireless connection? What then, huh?

    This is unfair competition with BellAtlantic. I predict lawsuits when users demand to be given a choice.

    Won't this give them all brain cancer?

    The problems seem endless.

    --
    sigs, as if you care.
  13. AirPwn by crimethinker · · Score: 5, Funny
    I predict increasing use of AirPwn on-campus. See also SourceForge project page.

    Nothing works quite as well as a good, old-fashioned bundle of wires.

    P.S. no connection to the AirPwn folks myself; I just think their particular demonstration project was eff-ing hilarious.

    -paul

    --
    Pistol caliber is like religion: everyone has their favourite, and theirs is the only right choice.
  14. I go to Dartmouth... by theoddball · · Score: 5, Informative

    ...and I work at the helpdesk, no less. I've beta-tested the VOIP rollout and supported the rest. My personal opinion is that the wireless network will NOT hold up well under heavy load once all these services go into widespread use. As it stands now, things slow to a crawl during finals, etc, when people swarm the library and the APs. This is, after all, an 802.11b campuswide network. The backbone is there, but I don't know how the APs will deal with all these latency-sensitive streams. Side note: they've been promoting the VOIP option in the media for months now, but students aren't allowed to get extensions. A little disingenuous, no? Hell, I'd just be happy if the "100% coverage" actually ever gave me a signal in my room. There's some content, and prospects, for this--but so far, it's just PR-fluff.

  15. cool by honold · · Score: 3, Funny

    now the 2.4ghz phones get to interfere with their own connection!

  16. five years ago... by remove+office · · Score: 3, Interesting

    five years ago, dartmouth was considered the most wired campus in america. and that was a good thing. two years ago, dartmouth was considered the most unwired campus in america. and that was a good thing. as somebody who lives in the town (hanover) and gets wifi reception all over the place, i'd say it's a good thing. of course that's just from a leeching standpoint. unfortunately they'll be switching away from assigning real ips via wifi soon...

  17. Re:TV over ethernet by CharlieHedlin · · Score: 4, Informative

    Digital cable and statelite typically use 2-2.5mbits for SD programing. With proper multicasting, QOS, large frames, you could probably get 500mbits onto GigE without trashing the network, giving us 250 SD channels.

    HD mpeg2 needs about 18mbits, and HD divx needs 10-12mbps. I believe DVDs run at 4-5 mbits, and the quality is better than digital cable or satelite.