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Merging WiFi VoIP Into Cellular Service

Anonymous Coward writes "The New York Times (registration required) reports that Motorola, Proxim and Avaya are expected to announce today that they will jointly develop technology to allow wireless communications to jump between networks without interruption. This appears to involve making use of WiFi for phone service where it's available, thus converting WiFi hotspots into congestion relief for overloaded cellular networks, and, of course, making cell phones into WiFi terminals."

43 of 104 comments (clear)

  1. Keep on saying it.. by Anonymous Coward · · Score: 3, Interesting

    ...but "wifi" is a STUPID acronym.

    The proper name is 802.11b. "Wifi" is meaningless marketroid-speak. (Or in this case, slash-speak since the slashdot editors insist on spouting "wifi" at every given chance).

    Better hope that they don't invent "wifi anime"...

    1. Re:Keep on saying it.. by Anonymous Coward · · Score: 2, Interesting
      How the hell is WiFi meaningless?

      And even if it were "marketroid-speak" it's still more catchy and easier to pronounce than a friggin' 802.11b. It's IEEE1394 and FireWire all over again.

      You purists are free to use "the official" name all you want. Just don't expect the rest of us to do so.

    2. Re:Keep on saying it.. by alannon · · Score: 3, Informative

      Actually, not all 802.11b implementations are 'WiFi' compatible. Also, 'WiFi' also has a 802.11a implementation. Almost every 802.11 system you purchase now is 'WiFi', but when the technology was newer, often base stations and remote cards were only compatible between the particular brand.

    3. Re:Keep on saying it.. by Anonymous Coward · · Score: 3, Insightful

      Well, O'REILLY uses Wi-Fi in thier book "802.11 Wireless Networks: The Definitive Guide" when refering to 802.11 in general, so it's good enough for me.

      I don't go around calling my Ethernet network a "slightly modified 802.3 network"

      All it means is that the technology has gone mainstream. Would you rather have it called 802.11b, if it meant that it wasn't popular? Which of course means there are no hot-spots and the hardware cost 10 times more. Your choice.

  2. um by serps · · Score: 5, Interesting

    Doesn't this mean that cellphone congestion will now lead to degraded wifi performance?

    --
    "Einstein argued that [...] God is not capricious or arbitrary. No such faith comforts the software engineer." ~ Brooks
  3. Re:Stop the fucking cellphones! by Anonymous Coward · · Score: 2, Funny

    Hello, what's it like back there in the 1980s?

  4. Death of UMTS by Koos+Baster · · Score: 5, Interesting

    I'm sure this is what telcos have seen coming and have been scared shitless of. This will prevent them from ever making UMTS into a commercial success, especially taking into account they payed far to much for licensing the (yet-to-be-used) UMTS frequencies.

    I guess VoIP over WLAN won't do much to their current markets, since high bandwidth isn't an issue for voice. But it seems they've lost the battle for data even before it's started...

    Or can commercial UMTS and open WLAN coexist?

    1. Re:Death of UMTS by Mwongozi · · Score: 4, Insightful

      WLAN just doesn't have the range. A 3G or even GPRS cell can cover many miles, WLAN hasn't a hope of ever getting that range omnidirectionally. (Is that a word?)

    2. Re:Death of UMTS by Eminence · · Score: 3, Insightful

      I'm sure this is what telcos have seen coming and have been scared shitless of. This will prevent them from ever making UMTS into a commercial success, especially taking into account they payed far to much for licensing the (yet-to-be-used) UMTS frequencies.

      UMTS is already dead and buried - and everybody in the industry understood that shortly after last UMTS licenses were sold for crazy piles of money. The system discussed in the article won't change the picture that much - UMTS promise didn't concern voice calls (these are quite well served by the GSM system) but rather multimedia transmissions.

      Also, spread of cheap WLAN connectivity not controlled by telecoms is only one of the reasons why UMTS is dead. Main reason is that it turned out that people at large are quite happy with just calling and sending short messages and are not interested in paying lots of money for fancy phones and then for multimedia content. All analysts agree that it will take time before significant number of customers would be interested in what UMTS promised.

    3. Re:Death of UMTS by Katalyzt · · Score: 3, Interesting

      Isn't the 2.4 GHz band meant for PRIVATE citizen use not business? At this rate commercial 802.11x operators will swamp the limited bandwidth leaving nothing for individuals.

      --
      version 0.0002
    4. Re:Death of UMTS by Zarhan · · Score: 4, Insightful

      This is hardly the death of UMTS. Of course, I'm an engineer, so the techical terms may not be the same ones used by the public at large.

      Anyway, in upcoming UMTS versions (starting from rel 5 I believe), the UMTS network can actually use WLAN as an access technology. It can also use xDSL, for that matter. The "old" WCDMA is of course still there.

      The basic idea is to converge all those different networks so that telcos that act also as ISPs don't need duplicate systems for user accounts and stuff. This way there can also be easier integration (access your mail account from your phone WITHOUT any hassle -> everything is configured into your subscriber SIM card) and stuff like that.

      Actually, the official position for most telcos deploying UMTS (as in "WCDMA") seems to be that they are back to their original plans. Original meaning the same plans they had before the IT boom. The boom was supposed to speed things up a bit => well, it did not, and everyone lost some money, but what the hell, show must go on.

      (Disclaimer: I may have myself confused some of the terminology above. Currently I'm 100% certain only of the "IMT-2000" umbrella term :))

    5. Re:Death of UMTS by Koos+Baster · · Score: 2

      Hmm. Yeah, but having WLAN in the 10% area which generates 80% of data traffic leaves telco's with the responsibility to cover the 90% that generate the remaining 20% of traffic. Thus, for telcos, costs stay roughly the same while profits dive down.

      Remember that even when 3G, GPRS or UMTS are available as an alternative to WLAN, no one will use it because WLAN is much faster, and probably cheaper too.

    6. Re:Death of UMTS by Koos+Baster · · Score: 2

      UMTS is already dead and buried [...] The system discussed in the article won't change the picture that much

      This is all true, but at some point it was unclear whether phone companies like Erikson, Motorola, Siemens and Nokia were going to support WLAN rather than (or as well as) GPRS, 3G,... And this story clearly shows they're not going to stay married to telcos 'til-death-parts.

      Main reason is that it turned out that people at large are quite happy with just calling and sending short messages and are not interested in paying lots of money for fancy phones and then for multimedia content.

      While true for the majority of users, I believe there are some fringe cultures and businesses for which relaying data is tentatively gaining. Phones with CCD cameras (MMS) appear to be a mild sales success and there's some innovative stuff going on in logistics and distribution companies that will rely on wireless communication with 99% coverage. This doesn't (yet) concern high bandwidth, but ultimately having WLAN eating the most profitable areas will slow down the spread of UMTS networks even more. But sure, its no secret that UMTS is never going to be profitable.

    7. Re:Death of UMTS by Koos+Baster · · Score: 2

      The division between public and commercial organizations isn't that clear. There's no law against opening your access point in exchange for access to other peoples'. As many initiatives have already proven, it's not even an obstacle to have a non-profit / commercial organization to administer these voluntary access points. I.e. it may not be likely that the traditional telcos eat up the 2.4 GHz frequency, but there may be other groups / organizations that will.

      Note however, that legally speaking you're free to use "amateur" frequencies only without effectively blocking it from others (though in this case, law may not concur with simple physics).

    8. Re:Death of UMTS by Mwongozi · · Score: 2

      That's the fundamental difference, of course.
      WLAN = Short distance, fast, cheap.
      Cellular = Long distance, slow(er), quite expensive. (Charged per megabyte, usually.)

    9. Re:Death of UMTS by 2nd+Post! · · Score: 3, Interesting

      How about point to point wireless, due to phased array antennas?

      There are going to be a few out on the market this very year for wifi!

  5. No registration links. by I+am+Jack's+username · · Score: 4, Informative

    Submitters, please use news.googled links instead.

    1. Re:No registration links. by Hobbex · · Score: 3, Interesting

      Or even better, why can't Slashdot just call up the New York Times and ask to become a partner as well? This site must drive more traffic to nyt.com then just about any other partner (they get slashdotted, what?, once or twice a day, which means upward toward half a million hits) and it's readers are notoriously anti-registration.

  6. This is called vertical handover by Anonymous Coward · · Score: 2, Informative

    Google has more information about it.

  7. Common wireless protocol? by hyrdra · · Score: 5, Informative

    Don't know if we already have this or not, but don't we first need a common voice protocol that is agreed upon and used by all? Kind of like something as ubiqious as TCP?

    The last time I checked most of today's phones aren't even hardware compatible with most other carrier networks, and phone manufactures have resorted to having to put 3 different protocols in one phone (tri-mode, etc.). Talk about inefficient.

    Wouldn't it be easier if all wireless communication just ran on one set protocol that worked over multiple frequencies? Nevermind the differences in modulation at 900 MHz, 2.4 and 5 GHz, I'm talking about a true high-level/low-level protocol here.

    There is no way you're going to be able to stuff an 802.11b/a transceiver into an already high priced, low battery life phone.

    If we had a set protocol for doing all things wireless, then it wouldn't be a matter of what physical network you're on, even what type of network you're using or who owns it.

    That seems like what they are trying to do, but this seems a little late in the game. People just didn't realize all the wireless capacity we have right now just floating around -- the only problem is you need x device that supports x protocols and sometimes you need to purchase directly from the wireless carrier. I guess until now, when we have dozens of different standards and NOW we want to connect them all together.

    The sad thing about it is if such a device were to be created that could mitigate across all these different protocols and networks, it's going to be one huge complex mess and is going to cost a fortune, when it didn't have to be. Maybe government regulation and forced standards are sometimes a GOOD thing.

    --


    "I'll just chip in a bit for RedHat: I actually have that installed on my university machine." - Linus, '95
    1. Re:Common wireless protocol? by Max+Romantschuk · · Score: 3, Insightful

      There is... It's called TCP/IP. It can run on Ethernet, WLAN, ATM, GPRS, tunneled through PPP, SSH...

      Why reinvent the wheel?

      A general purpose physical layer protocol is unlikely though. IMHO anyway.

      --
      .: Max Romantschuk :: http://max.romantschuk.fi/
    2. Re:Common wireless protocol? by Zayin · · Score: 5, Informative

      Don't know if we already have this or not, but don't we first need a common voice protocol that is agreed upon and used by all? Kind of like something as ubiqious as TCP?

      The IETF has quite a few RFC's on the subject:

      For transport: RTP
      For call setup: SIP
      For resource reservation: RSVP
      SIP is actually being used in UMTS networks for call setup.

      --
      "I'd rather have a full bottle in front of me than a full frontal lobotomy"
    3. Re:Common wireless protocol? by dago · · Score: 2
      " Don't know if we already have this or not, but don't we first need a common voice protocol that is agreed upon and used by all?"> Yes, it's called GSM (and the next version UMTS). Sorry, but by 'all', I understood the whole world except the USA, maybe you took the other 'all'.

      To answer the other answer : TCP is layer 4, IP is layer 3 -> GSM and all 802 protocols (ethernet ,wlan) are layer 2

      If you want a common layer 3 protocol, IP goes without any problem over WLAN, GSM (in its GPRS flavor), UMTS.

      If you want a common wireless layer 2 protocol, for me, it's better to have different protocols for different purposes. Just think of wired communications, there are lots of protocols. Would you really like to replace all of them by ethernet ?

      --
      #include "coucou.h"
    4. Re:Common wireless protocol? by macmurph · · Score: 3, Insightful

      There is no way you're going to be able to stuff an 802.11b/a transceiver into an already high priced, low battery life phone.


      I see no reason why not. I dont know where you are coming from when you say high priced and low battery life.

      First, they have 802.11b tranceivers in the compact flash and memory stick form factors. They dont cost that much to manufacture, certainly less than $100. Im sure the 802.11 technology would be even smaller and cheaper if it were designed for a high volume (im avoiding the phrase "mass produced" since mass production has been superceded by lean production) cell phone design.

      Im guessing an 802.11 tranceiver would require less power than a phone...not more because, in general, you are much closer to your WiFi access point than you are a cell tower.

      Next, 802.11b is likely much cheaper to implement than a custom designed cell phone based on the ARM processor... Ive worked in that industry and can tell you that every single handset is unique and represents millions of dollars in development costs. Standardizing on 802.11 could save a lot of money for the handset manufacturers.

      Finally, the real cost savings would be in the distributed network infrastructure. No cell phone towers to maintain. Just route calls through public access points. When you think of the billions of dollars wasted on the 3G networks, WiFi is like a free/cheap 3G infrastructure that is building itself all over the world.

    5. Re:Common wireless protocol? by good-n-nappy · · Score: 2

      It's been a while since my networks class so maybe you could clarify for me... Is IPv6 currently being used? Isn't that what was necessary to do voice over IP correctly? Or is the prevailing theory that there is enough bandwidth so that bandwidth guarantees aren't necessary.

      The times I have used voice over IP, it was just annoying enough to bother me. It's been a while since I've tried it though so maybe its gotten better? Anyway, I've also had the same experience on cell phones occasionally but it is usually good enough.

      --
      Never underestimate the power of fiber.
  8. registration required != free by muyuubyou · · Score: 2

    I'm "sick & tired" :) of registering everywhere.

    Requiring registration makes a service NOT FREE . It costs you part of your information and FREEDOM

    Somebody explain the guys at NYT that a registration can't be free . Of course, I'm talking free as in "free speech", "land of the free" (if that means something) and not "free beer" (not that I don't like free beer).

    For the interested: http://www.gnu.org/philosophy/free-sw.html

    1. Re:registration required != free by cdrudge · · Score: 2

      I'm sick & tired of people using this argument. There is more then one fricking definition of free. Free as in beer. Free as in speech. Free as in Dmitry. The registration is free in the meaning that 99% of the world thinks it means. It does not cost any money out of your pocket. Does it cost money to someone...yes. In a technical sense, nothing is free...it comes at a cost to something somewhere.

      All that NYT is asking is a little information about you. You don't have to give up your life's story. If it is a big deal, you can lie about the information or just use some other news source. Your not giving up any of your precious freedom by telling them your name.

  9. GSM operators nightmare � or not? by Eminence · · Score: 5, Insightful

    Cellular operators perceive WiFi as a threat, because there has been long feared that cheap, community operated wireless networks ("guerilla networks" in corporate speak) would wipe out operators own WiFi offerings. What seems to anger operators most is that the whole concept of local wireless networks is not in line with the operators' idea of monetizing every single byte transmitted over the air. Also operators feared that someone would come up with an VoIP-WLAN phone that would offer very cheap voice calls in the WLAN range. WLAN networks.

    Now the impact of this new device (and system) that this partnership is going to produce depends on whether it would be oriented towards operators (and would thus require deep integration with GSM operator's infrastructure) or rather corporate customers (and would therefore be more like an software over-the-Internet VPN solution but also for voice communication). I think the first option is more likely and then the operators would be in position to control to some extent the WiFi market with local WLAN operators reduced to being just local bandwidth providers. The most important part of making this work would be the SIM card (or its equivalent) identifying the user and interfaces connecting a registry of users to authentication mechanisms of various visited networks. Most of that is what GSM operators already have.

  10. Finally by mrselfdestrukt · · Score: 4, Informative

    I was wondering when that will happen. Especially with all the delays in getting 3G up and running and with the high costs of getting normal mobile telephony switches to do higher bandwidth through all kinds of tweaks and compression, it just makes sense to use a tried and tested technology. They could mountstrong wifi antennas on each current basestation and use that for multimedia phones. That will also solve the problem of a manager sending a 101x80 res video clip of his new porsche to his mother and thereby congesting all voice traffic on that cell.
    I think this should be researched further and implemented.

    --
    "I used to have that really cool,funny sig ,but it got stolen."
  11. cellphones no longer for yuppies by muyuubyou · · Score: 3, Interesting

    Cellphones are already cheap enough, and may get even more cheap if this 802.11 thing works.

    My 15 years old cousin uses it mainly to date chicks. His phone costed him about $100 and he spends around $20 a month in calls. For the same price, you can get him anytime, and he can call, for example, if he had problems with his bike.


    Get real.

    "Computer users... those arrogant yuppies. If they have so much office work to do, why don't they hire a secretary?"

  12. Not sure this'll ever get off the ground. by terrencefw · · Score: 5, Insightful
    Am I the only one who suspects that this well never really get off the ground because of the fact that nobody seems to be able to conform to standards any more? It seems like a good idea in principle, but I'm sure that one of the players named above, or some other company will muddy the waters with some proprietary standard to enable them to leverage their intellectual property and put an end to the show for everybody else.

    --
    Like tinyurl, but one letter less! http://qurl.co.uk/
    1. Re:Not sure this'll ever get off the ground. by nycview · · Score: 2, Insightful


      With Wi-Fi networks in "hundreds of feet" and with E911 location requirement in "tens of feet" it will never work.

      Phone carriers have to meet E911 / CALEA requirements in the next year.
      (The order applies to wireline, cellular and broadband PCS telecommunications carriers.)

      CALEA
      FCC E911

  13. This has been done by other vendors already. by Magnus+Pym · · Score: 4, Interesting

    Seamless handoff between 802.11 and CDMA was demonstrated at the recently concluded CDMA Americas congress.

    Motorola is in trouble because they are missing the 3G-boat in a big way. Their infrastructure implementations of both 1xRTT and WCDMA suck, and they are getting no orders. They have chosen not to implement 1xEV-DO. So right now, they have no data solution to offer their customers. They are coasting based on their handset sales, and their proprietary lock on Nextel. This announcement is just another tactic to muddy the waters and to buy them time from relentless competition from Nortel, Lucent and Samsung.

    Magnus.
  14. Isn't VoIP over WiFi woefully inefficient? by swb · · Score: 2

    I was asking our phone system vendor about the availability of 900/2400Mhz DSS phones for our Meridian switch. They said they had a 900Mhz analog version for a while but that it got killed off. They said the next thing was likely to be VoIP over WiFi.

    Isn't this really ineffecient and overly complicated? I can see where maybe it might be desirable in a home setting or other uncongested environment, but it strikes me as kind of inefficient both from a power consumption and component basis as well as a bandwidth basis to encode voice to data and then encode data as IP for transmission when it would be cheaper and more efficient to directly transmit the encoded voice the way your run of the mill digital phones now do.

    I also wonder what it would do in any situation where a PC may suddenly decide to move 100M over the same Wifi base; is there enough congestion control and prioritization on Wifi to keep calls from dropping out or otherwise sounding like a bad cell call? Or is that merely the standard we're expected to accept?

  15. I hate it. by mmol_6453 · · Score: 2

    I help out with a mom-and-pop BBS that provides dial-up access.

    We're still getting new customers, and we'd like to expand into wireless. (Anyone have references on raising antennas by balloon?)

    I keep seeing advances in telecom equipment, but we generally can't take part in it because it requires high-cost rented space (for DSL) or owning the landlines (cablemodem). You generally have to be a large company in order to get these things, and the largest companies are getting more and more of the market share.

    For an analogy, consider what would happen if one company owned all of the cable providers in the US. Kinda like Microsoft...

    Of course, the FTC isn't going to allow many of the mergers this would require, but that doesn't mean the companies aren't still absorbing small businesses and providers.

    --
    What's this Submit thingy do?
  16. Cell Phone companies trying to screw us over? by Jeremiah+Blatz · · Score: 3, Insightful

    Cell phone companies trying to screw over customers, freenets. News at 11.

    They want to use 802.11 networks to "relieve congestion on cell-phone towers." In other words, "we don't like building new towers. I know, let's use the WiFi network that our customers are paying for to cheap out!" This will, of course, dramatically increase the load on the the WiFi networks, increasing the cost of commercial ones and making FreeNets more expensive to run. Your cell-phone service stays at the same price, though. This is remarkably dishonest.

    Hopefully it'll backfire and people will just start using dedicated VoIP services once they realize that they're paying for the network anyway. It'll still hurt FreeNets, but at least it'll smack down the telco monopolies.

  17. I wouldn't like that by tkrotchko · · Score: 2

    "The basic idea is to converge all those different networks so that telcos that act also as ISPs don't need duplicate systems for user accounts and stuff."

    The telcos don't really want your business all that bad. If they did, they would have technology that would allow xDSL to work outside a densely populated metropolitan area.

    I live in one of the most populous areas of the country, in a relatively wealthy county, and since I live 5 miles from the central office, I can't get high speed internet from the phone company.

    Not because it really isn't possible, but because they're so witless and slow-moving that they think its too much trouble.

    Meanwhile, the *cable* company figurd it out.

    What does it tell you when the cable company has better and smarter technology that you?

    --
    You were mistaken. Which is odd, since memory shouldn't be a problem for you
  18. Can't fight the future... by JakiChan · · Score: 2

    I think it's clear that someday phones will someday just be networked devices, and that the "cell phones" will be just be wireless devices that do VoIP (and probably data), and my laptop will be a wireless device that does data (and maybe VoIP too). I just feel like the abundance of standards is gonna make it happen later rather than sooner. Although even if the standards made it happen tomorrow, it will take some time for the convergence folks to bring the phones and PDAs together.

    --
    "Where quality is like a dead stinking rat - you just can't miss it."
  19. Uh, confidentiality anyone? by jgercken · · Score: 2, Insightful

    I'm ok with my voice being xmitted over the carrier's network but this is a little disconcerting. What degree of privacy is afforded by a random public access point operated by some random individual? Isn't WiFi really a shared medium? think:WarEavesdropping. I sincerely hope this concern is being addressed.
    -Jeff

    --
    Never ascribe to malice what can be adequately attributed to ignorance. -Napoleon
  20. Previous announcements by _observer · · Score: 2, Informative

    Nortel Networks already announced this type of program back in December 2002:

    http://www.nortelnetworks.com/corporate/news/new sr eleases/2002d/12_03_02_wireless_lan.html

    (Safe Harbor: I work for Nortel; this is a public news release at the corporate web site).

    --
    -- Straights are for fast cars, corners are for fast drivers.
  21. Please correct me if I'm wrong... by Mac+Degger · · Score: 3, Insightful

    ...but does that mean that the phone companies are going to use /our/ wifi points when they get congested?

    I mean, in a couple of years it's concievable that we use palmpilots or ppc's with VoIP in combination with wifi to get in touch with each other (in the same kind of way that ICQ has worked....when enough people use it, it crosses a critical threshhold and becomes useable for the masses), using, I dunno: URL's or something as phonenumbers.

    All it takes is one in five geeks in a city to buy a good wifi point and someone to write good switching software, and you have a free urban VoIP telephone service. Then maybe use some good geek's T1 line to connect the wifi network in that city to the internet, and you can patch multiple wifi networks together, creating a secondary, free, VoIP telephone network.

    It just seems to me we need more wifi points, more PDA's and a switching protocol to get free telephony to other geeks like us....or am I making a huge mistake in my thinking?

    --
    -- Waht? Tehr's a preveiw buottn?
  22. Many posters missing the point... by djrogers · · Score: 3, Interesting

    This isn't about getting high-speed data on to your cell phone, it's about using your cell phone with your office telephony servers.

    Imagine being on a conference call at your office. You tap a button on your fancy Avaya 4620 IP hard phone, and your cell phone rings. you pick up and it's your conference call, coming through IP over the 802.11 network. You continue to listen on your cell using NO 'plan' minutes at all since this is your campany's private network, until you decide to go to Taco Bell. When you drop out of range of your office WLAN, voila - automatic handoff to the cell network. You return and you're back on the 802.11 network.

    The point folks, is that if we do this right, you won't even _need_ a desk phone... Unless you want one.

    --
    Think outside the... Hey, where'd the friggin' box go?
  23. The real question is... by cryptochrome · · Score: 2

    How much will they charge you for using the wireless router and broadband service you already paid for?

    --

    ---If you can't trust a nerd, who can you trust?