Presentation on theme: "802.11ac for Hoteliers – Its time Getting off the Wi-Fi Roller Coaster - The Graceful Transition to 802.11.ac Perry Correll, Xirrus, Principal Technologist."— Presentation transcript:
1802.11ac for Hoteliers – Its time Getting off the Wi-Fi Roller Coaster - The Graceful Transition to acPerry Correll,Xirrus, Principal Technologist
2Agenda Addressing guests' demand for Wi-Fi everywhere Understanding Wi-Fi’s evolution to 11acMyth vs. Reality: separating marketing messages from business advantageDesigning High-Performance Wi-Fi Networks: Doing more with less infrastructureSummary / Q&A
3The Exploding Demand for Wi-Fi Understanding guest expectations
5Wi-Fi usage has exploded In 2013 Smartphone/tablet sales will exceed that of all consumer electronics combined – IDC Predictions -2013Every day another 4 million+ wireless devices are activated– Flurry-201355% of hotel guests use Internet during their hotel stay in 2012, up from 20% in Of those, 87% today connect by Wi-Fi – J.D. Power, 2012 survey
6Networks are not prepared for the traffic Instagram video becomes #1 traffic on Internet on day 1 of releaseNetflix And YouTube Account For 50% Of All North American Fixed Network DataReal-Time Entertainment responsible for over 67% of peak downstream traffic
7Plan your Wi-Fi carefully! “80% of newly installed WLANs will be obsolete or re-engineered in the next 3-5 years due to lack of proper planning”Tim Zimmerman
8Wi-Fi’s evolution to 802.11ac What’s the advantage?
9802.11 Evolution Multi Gigabit Wi-Fi is the future New standards are focused at 5GHz802.11ad>5Gbps60GHz802.11a54Mbps5GHz802.11n600Mbps802.11ac>1Gbps802.112Mbps802.11b11Mbps802.11g54Mbps2.4GHz802.11n300Mbps199719981999200020022003200420082009201120132014Wi-Fi Standards Evolution
10Technology Benefits Data rates up to 6.9Gbps What is 802.11ac High performanceRaises the ‘low’ endSuperior throughputBackwards compatibleSupport more devices‘Cleaner’ spectrumImproved battery LifeFocus on 5GHz spectrumImproved modulation efficiencyChannel bonding up to 160MzUp to 8 spatial streamsMU-MIMOThe 11ac that will be ratified early next year is getting a lot of mindshare. There is so much talk about ac, what is it? How does it provide significant improvement over 11n technology. Let us look under the hood. There are some core improvements over 11n that makes it 11ac deliver significantly higher throughput of up to 6.93Gbps.Data rates up to 6.9Gbps
11802.11n vs ac802.11nUp to 600MbpsUp to 64 QAM ModulationUp to 40Mhz channel widthUp to 4 data streamsMIMO- Single client link802.11acUp to 1.3GBps / 6.9GbpsUp to 256 QAM ModulationUp to 80/160Mhz channel widthUp to 4/8 data streamsMU-MIMO-Multiple client linksMU-MIMO (multi-user multiple in multiple out) signal processing uses multiple antennas on the transmitter and receiver operating on the same channel. With spatial multiplexing in ac, up to 8 data streams may be concurrently transmitted and split between multiple devices at once.Higher data rates are achieved by splitting transmitter station streams into separate data streams; each transmitted on a different antenna. MIMO signal processing at the receiver detects and recovers each stream.
12Standards Roll out plans Final standard approved by the IEEE Feb’143 Streams80 MHz channel width256 QAMProduct Availability: NowWAVE 24/8 Streams160 MHz channel width256 QAMMU-MIMOProduct availability: 2H ‘14IEEE ac data rates are dependent on the number of spatial streams obtained through the useof MU-MIMO, 80 vs. 160MHz channel widths, the number of transmit antennas, and the type ofmodulation. This table shows the maximum data rate achievable at each level, with many additionallower rates occurring at each level dependent on signal level, SNR, etc.Phase ac products, first available in consumer products in 2012 and enterprise products in2013, support up to 80MHz channels and up to 3 spatial streams for a maximum data rate of 1.3Gbps.Phase 2 and beyond products, expected staring in 2014, will add 160MHz channels and up to8 spatial streams for a maximum data rate of 6.9Gbps.Wi-Fi Alliance has launched Wi-Fi Certified™ acWave 1 product certification completedWave 2 products certification: expected late 2014 /early 2015
13Side Note: New Spectrum Proposed Importance of Additional SpectrumWide bandwidth channels to support high throughput requirementsCurrent UNII spectrum allows onlyTwenty four 20 MHz channelsSix 80 MHz channelsTwo 160 MHz channelsAdditional unlicensed use of GHz and GHz allowNine 80 MHz channelsFour 160 MHz channels1441401361321281241201161121081041001651611571531496460565248444036IEEE channel #20 MHz40 MHz80 MHz160 MHzUNII-1UNII-2UNII-35250MHz535054705725NEW969288848076726816917317718158255925Currently available channelsNew channels
14Is it time to consider to 802.11ac? What is the current feedback from guests and event schedulers?What Wi-Fi technology is your existing system based on?How long do you want your next upgrade to last?802.11ac sales will accelerate, reaching over 90% of all Wi-Fi devices by 2015Growth of ac capable Wi-Fi devices reach nearly 2 billion by 2015Assuming 3 year replacement rate = 70% ac market share by 2015.
15separating marketing from value 802.11ac: Myth vs. Realityseparating marketing from value
16Myths vs. reality Only high-end clients need this much bandwidth/speed Very few 11n clients reached 450Mbps, all still received valueHigher bandwidth releases the channel quickerMaking additional time (bandwidth) available to other clientsImproves overall capacity and performance of the networkKey value of 11ac is raising the lower endJust wait for Wave 2 (MU-MIMO, 6.9Gbps, …) to be safeWireless continues to evolve with newer technology every 2-3 years2007 to 2015 saw n 2x2, 3x3, ac Wave 1 & Wave 2Reality – it depends on your wireless requirements, If your users will benefit from improved wireless performance today, go forwardProbably a few still waiting for 11n 600Mbps (4x4)SNR:6 more db compared to 11n min SNR needed to decode 11ac
17Myths vs. reality Only limited # of 11ac clients used by guests Samsung has sold 40 million Galaxy S 4s (11ac)Can’t buy Apple laptop without acMRG estimates 58 million 11ac phones shipped in 2013Turnover rate continues to drop (6 months), 11ac will be the default chipsetLTE growth will significantly reduce need for Wi-FiCellular and Wi-Fi are not competitors,Cellular and Wi-Fi are complementary technologiesCellular is large coverage area with low data rate (relative)Wi-Fi is reduced coverage area with high data rate (relative)Think Wi-Fi offload, Passpoint, u, NGH, …..SNR:6 more db compared to 11n min SNR needed to decode 11ac
18Myths vs. reality802.11ac will require a complete network rip and redesignTechnology (wired and wireless) continues to evolve, planning for it is keyYou will still need to support legacy technology for a long timeDesigning with up to 160Mhz channels, using 256QAM, Rx Sensitivity of 51dBm to get max data rates is a waste of time, energy and moneyThink like an engineer, not a scientist11ac allows you to reduce # of APs to offer same bandwidthYes, in Theory, No, in Reality – where do you want to live?Performance will always be based on the clients capability, not just APAlways will have mixed environments, lowest common technologyWireless is continuing to grow and you will always need more bandwidthThink radios, not APsSNR:6 more db compared to 11n min SNR needed to decode 11ac
19Myths vs. reality Just too many technical challenges with 11ac Not enough 5GHz channels available (80-160Mhz per channel??)Complex channel planningWill increase CCI & ACI interferenceI will lose support for 2.4GhzMy existing network was designed for 2.4Ghz11ac requires higher signal strength (RSSI) to be effective (1.3Gbps)Phones and tablets require stronger signal strength (RSSI)Need to upgrade my edge switchesNeed to upgrade my switch uplinksWill 802.3af be enough – maybeNow I will need to pay for a consultant too!Urgh, cat 3 to cat 5 was so easySNR:6 more db compared to 11n min SNR needed to decode 11ac
20Myths vs. reality What are you hearing? What are you believing? Myths and Questions From AudienceWhat are you hearing?What are you believing?What are you thinking about?What's keeping you up at night?What are other vendors telling you?What are your consultants telling you?What about other technologies ad, af, …SNR:6 more db compared to 11n min SNR needed to decode 11ac
21Designing High-Performance Wi-Fi Doing more with less infrastructure
22Hotel Wi-Fi design evolution 2010Nice to offer3-5 active devices per floorDesign RF for laptops (-72)2.4 centricApplication focus -Guestroom coverageWired still primaryCellular - not my problemQuality of ServiceMeeting space Wi-Fi requestedWi-Fi = infrastructure expense2014Mandatory requirement3-5 active devices per roomDesign RF for tablets/phones (-65/-59)5Ghz centric, but 2.4 is requiredApplication focus – Video and GamingFacility wide coverageWired is no longer an optionCellular integration - PasspointQuality of ExperienceMeeting space Wi-Fi requiredWi-Fi = Monetization of the data?
23Client environment - Reality = 2.4GHz= 5GHz300Mbps2.4G and 5G450Mbps Max65Mbps=2.4G and 5G150Mbps Max=65Mbps150Mbps1.3Gbps2.4G only65Mbps Max52Mbps=24 Mbps45Mbps6Mbps6Mbps120Mbps150 MbpsIn a Wi-Fi network, the user data rates varies with distance, device type, Wi-Fi band, channel width capability, interference, …..
24Wi-Fi Capacity - Reality 150Mbps Max Instantaneous Bandwidth2.4GHz Radio50Mbps Avg Capacity: Multiple Users300Mbps Max Instantaneous Bandwidth5GHz Radio100Mbps Avg Capacity: Multiple UsersIn a Wi-Fi network, radio capacity is reduced by protocol overhead and is shared by multiple users
25High Density Capacity Planning Gartner recommends provisioning 6Mbps per userRadioIndividual User CapacityTotal Available CapacityWireless network design based on number of users per radio5GHz radio: 100Mbps / 6Mbps = ~15 users per radio2.4GHz radio: 50Mbps / 6Mbps = ~8 users per radio
26mixed client environment - optimization The ChallengeWi-Fi is shared medium - slow clients reduce speed of fast clientsThe Solution – Client Classification and SegmentationSeparate high speed and low speed clients on different radiosMaximize system performance for ALL clients
2711ac Design considerations Wireless ArchitectureDistributed/Edge traffic processingDesign for 5Ghz coverageAchieving AC speedsUnderstand the mixed client environmentClassify and segment clients based on Band/ModeWired InfrastructureGigabit links to APsDesign for increased backhaul traffic (MU-MIMO*), Multi-Gigabit uplinksImplementation planningClients and Traffic volume will growDesigning for the futureHow long do you expect a new install to last?
28802.11ac will become prominent in 2014 Summary802.11ac will become prominent in 2014Driven from client manufactures802.11ac brings great promiseUnderstand myths vs. realitiesImplementation planning is keyArchitecture, client mix, fixed radios
29Thank You firstname.lastname@example.org Perry Correll,Xirrus, Principal Technologist