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KEYNOTE PRESENTATION "WiFi -The Real 4G" Brough Turner Founder Wireless is at a tipping point and WiFi leads the way. LTE and WiMAX are relative laggards, as innovation shows up in WiFi first. This session will look at current WiFi deployments, current and future opportunities, and illustrate why we are the tipping point of Broadband Wireless.

Text of Net blazr brough turner

  • Wi-Fi: the Real 4G!

    Brough Turner netBlazr

    [email protected]

  • Wi-Fi Mobile Local, products Data centric [email protected] or pedestrian speeds

    Many vendors, many market segments, billions of customers

    Ubiquitous service Voice centric Mobile at auto speeds

    4-6 vendors, ~300 customers, 1 [email protected]


  • Wi-Fi

    Technology leadership O-load [email protected] Backhaul & xed wireless

    4 October 2010 3

  • Spectrum history 1920s: [email protected] radio receivers

    Needed to restrict who transmits 1927- 1934: Origin of FCC, spectrum licensing

    Ensuing decades - almost all spectrum assigned Three bands reserved for junk uses

    1985: FCC authorizes spread spectrum [email protected] in the ISM, or junk bands, i.e. 900 MHz, 2.4 GHz, 5.8 GHz


  • Wi-Fi History 1985 FCC permits [email protected] in junk bands at 900 MHz, 2.4 GHz & 5.8 GHz

    1988 - 1997 IEEE bodies iterate; eventually publish rst 802.11 spec Three alternate [email protected] for 1 Mbps [email protected] with a 2 Mbps [email protected]

    1999 802.11a 54 Mbps at 5.8 GHz using OFDM [email protected]

    1999 802.11b 11 Mbps at 2.4 GHz using DSSS [email protected]

    1999 Wireless Ethernet [email protected] Alliance (WECA) formed Focuses on interoperability and a [email protected]@on program

    2001 802.11d extends the spec for other regulatory domains (EU, Japan, etc.)

    2003 802.11g 54 Mbps at 2.4 GHz using OFDM [email protected]

    2003 WECA adopts new name: Wi-Fi Alliance


  • [email protected] highlights 1997: FCC authorizes Unlicensed [email protected] [email protected]

    Infrastructure (U-NII) adding 200 MHz in 5 GHz band

    2003: FCC adds 255 MHz more @ 5 GHZ; total now 555 MHz 2003-2009: Task Group n works to [email protected] improve Wi-Fi

    performance, in part via MIMO and Beam forming


    2007: 802.11n drak 2 products [email protected] by the Wi-Fi Alliance; Products shipping!

    2009: 802.11n spec approved

  • 4 October 2010 7

  • Wi-Fi Mobile Local, products Data centric [email protected] or pedestrian speeds

    Many vendors, many market segments, billions of customers

    Ubiquitous service Voice centric Mobile at auto speeds

    4-6 vendors, ~300 customers, 1 [email protected]


  • ITUs Vision for 3G (late 90s)


    Macrocell Microcell

    Urban In-Building




    Basic Terminal PDA Terminal

    Audio/Visual Terminal


  • 10

    3G Services Video telephony [email protected] services Push-to-Talk (VoIP w/o QoS) Rich presence (instant messaging) Fixed-mobile convergence (FMC) IP [email protected] Services (w/ QoS)

    Video sharing ([email protected] video on IP)

    Converged All IP networks the Vision

    Limited adop+on

    Limited adop+on

    Limited adop+on

    Limited adop+on

    Bypassed !

    No trac+on

    Too late

  • The Internet is the killer plaqorm

    Mobile Internet access drives 3G data usage

    Walled garden too late !


  • 12

    iPhone trac

  • US data trac


    = 3.3x per year

  • Global mobile data trac

    Nearly tripled between 2Q2009 and 2Q2010

    4 October 2010 14

    Source: Ericsson, Aug 2010







    2Q2009 2Q2010



  • US 3G performance

    Novarum Inc. (1/2010) Measurements in 36 [email protected] (Anaheim, , Boston, , Philly, , Raleigh, , Tempe)

    12-2009: 1.5 Mbps down

    Doubles: ~24 months


  • Increasing capacity


    Operator Services









    1. Add Cellsites ($$$$) 2. Newer radios ($$$) 3. More backhaul ($$$$)

    4. Femtocells ($$) 5. Wi-Fi ($)

  • Femtocells: too livle, too late

    Primary users of 3G/4G data also have Wi-Fi Laptops, smart phones

    Corporate IT prefers Wi-Fi they control Consumers deploying Wi-Fi anyway For PCs, for gaming, for home media Pay extra to help carrier improve their network?

    Femtocells do have value for voice coverage!


  • Public Wi-Fi Retail business giveaway Coee shops, restaurants, hotels, retail Harvard Sq. Business [email protected]

    Sponsorship [email protected], events Carrier supported e.g. Cablevisions [email protected] Wi-Fi

    By kumasawa


  • Ad supported Wi-Fi Didnt work in 2005; working now Costs way down; usage and interest up

    Freerunr in UK (& NL, RS, ZA) Splash screens, limited free periods,

    JiWire in US Ad plaqorm for free Wi-Fi Used by MS Bing [email protected] Wi-Fi oer

    Sputnik in US Ad supported model growing


  • Muni Wi-Fi, take 2

    Wireless broadband access networks Dozens of US [email protected] now succeeding

    [email protected] bring real estate, look to save current $ [email protected] for police & other city services

    Strong pressure for free in some form


  • Wi-Fi will dominate o load

    LTE network for coverage, but most data bytes via Wi-Fi

    Operator take away: Sell ubiquitous service any place, any +me

    while [email protected] seamless Wi-Fi data ooad

    4 October 2010 21

  • Backhaul / Fixed wireless

    Middle mile Cell sites Fixed wireless hubs

    4 October 2010 22

    First mile Homes and businesses

  • $220 per Mbps $7 per Mbps US Today

  • How could wireless possibly help?

    Limited capacity 100 Mbps, 300 Mbps, 1 Gbps,

    Licensed spectrum expensive Only [email protected] true

    Unlicensed unreliable Not any more!

    Wi-Fi doesnt go far 20-50 km! for < $500!

    4 October 2010 24

  • Wireless @pping point MIMO makes 5 GHz more useful than cellular or TV spectrum

    [email protected] antennas or beam forming [email protected] reuse incredible density increments

    Wi-Fi leads the way Moores law with [email protected] 802.11n spec. New specs, e.g. 802.11ac, ~ Dec 2012


  • 26

    Spectrum Myths

    TV Spectrum is beach front spectrum

    Based on legacy technology, not physics! Travels farther thru the air No! Thru windows roughly the same Goes thru masonry yes, with 50,000 wavs!

  • Free space path loss

    But this [email protected] encapsulates two eects: Actual path loss Receiving antenna aperture (assumed to be wavelength)


    Seems to say more , more loss

    5 GHz photons go just as far as 700 MHz photons !

  • [email protected] and [email protected]


    Shorter wavelength - more [email protected], [email protected] [email protected] Ghosts if a single receiver

  • MIMO: [email protected] Input [email protected] Output

    [email protected] paths improve link reliability and increase spectral eciency (bps/Hz), range & [email protected]


  • 30

    Rich Indoor MIMO [email protected]

    Source: Fanny Mlinarsky, Octoscope

  • 31

    Municipal [email protected] Environment

    Source: Fanny Mlinarsky, Octoscope

  • [email protected] radios per chip Like CPU cores

    2x2 MIMO 2008 4x4 MIMO 2010-11 then

    8 radios, 16 radios?, how to use silicon?

    Be8er and be8er beam-forming !





  • 33

    Beamforming Select among [email protected] predened antenna elements

    Widely used (2G, 3G, Wi-Fi Vivato, Ruckus Wireless) [email protected] antenna arrays

    Compute phase/amplitude for each antenna element Adapts for desired signal while also reducing interference

    8 antenna elements spread over 3.5 s, i.e. ~18 cm, or < 7.5 at 5.8 GHz

  • 34

    Commercial beamforming Wi-Fi beams, before silicon support Vivato (02-06)

    Technical success, but expensive Connect with 11g clients up to 2 km Vivato-to-Vivato up to 18 km

    Ruckus Wireless (today) 12 elements [email protected] switched to

    two channels on 2x2 silicon

    [email protected] outperforms [email protected] 2x2 systems

  • 11n wireless networking [email protected] in silicon Founded 2006; customers include Netgear 4x4 MIMO with beamforming


  • 36

    Beamforming ~2014: >300 Mbps Wi-Fi to ~1 Km at mass market prices

    4x4 MIMO with 8 antenna elements

  • 37

    TVWS Beach-front spectrum?

    Ideal antenna element [email protected] >= wavelength 2.1 meters at 70 MHz 21 cm at 700 MHz

    But only 2.5 cm for 5.8 GHz Wi-Fi

    Wavion Networks

    D-Link DAP-2553

    Ruckus Wireless

  • 38

    ILEC price umbrella

    >20x markup fosters wireless bypass Typical WISPs [email protected] 20%-50% under monopolists price umbrella

  • Wireless ISPs

    > 2000 WISPs, in fast growing segment Most use license- exempt spectrum

    Mix of pre-WiMAX, WiMAX and, increasingly, Wi-Fi gear


  • Wi-Fi for wireless broadband

    WISPs already use license-exempt spectrum

    Rapidly [email protected] to 11n technology Performance advantage is signicant

    [email protected] lower cost 5x or more vs WiMAX or LTE systems Increasing reliability, similar performance


  • [email protected] targets Wireless ISPs

    Point-to-point $130-$600

    [email protected] ~$240 & $68


  • Example Wi-Fi Pt-2-Pt Link UbiquiR BULLET-M5-HP With 28dbi Grid Antenna 802.11n

    Purchased through [email protected]:


  • Community WISP, Inc.


  • Wireless broadband Internet access for Brevard County FL

    Served from 4 lo

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