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Inside Wireless Voice and Data

Inside Wireless Voice and Data. Net@Edu Wireless Networking Meeting Kamal Anand VP Marketing Kamal@merunetworks.com. Agenda. Overview of Different Wireless Technologies Why 802.11 WLAN is the one for indoor Special Requirements for 802.11 in University Deployments

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Inside Wireless Voice and Data

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  1. Inside Wireless Voice and Data Net@EduWireless Networking Meeting Kamal Anand VP Marketing Kamal@merunetworks.com

  2. Agenda • Overview of Different Wireless Technologies • Why 802.11 WLAN is the one for indoor • Special Requirements for 802.11 in University Deployments • How these are getting addressed • Different Applications for Wireless • Replacement for Wired • Voice, Video over Wireless

  3. Company Background • Founded in Feb, 2002 • Funded by seven leading Venture Capital Firms • Headquartered in Sunnyvale, CA • Ujjal Kohli, Chairman, CEO and Founder • VP/GM, AirTouch Cellular (Acquired by Vodafone) • McKinsey & Co, Intel (engineering & marketing) • Founder, MKS Ventures ($50m • Dr. Vaduvur Bharghavan, CTO and Founder • Ph.D. EECS, UC Berkeley – thesis in 802.11 • 10 years in wireless research and establishing 802.11 standards • Over 40 publications and patents on 802.11 • Founder, Chairman and CTO, Bytemobile • Program Chair ACM Mobicom 2002, NSF Young Investigator 1996

  4. Wireless Standards Focus of Discussion WAN IEEE 802.16e WirelessMAN IEEE 802.20 (proposed) MAN IEEE 802.16 WirelessMAN LAN IEEE 802.11 WirelessLAN IEEE 802.21 PAN IEEE 802.15 Bluetooth

  5. Bluetooth Applications • Bluetooth technology • Designed for personal area networking (PAN) • Short-range, Low Power • Products • Cellular phones • Headsets • PDAs • Keyboards and mice

  6. WiMAX Applications • Metropolitan area network (MAN) technology • Connection-oriented • QoS • Line of sight and non-line of sight • Based on IEEE 802.16 and ETSI HIPERMAN standards • Applications • Last-mile broadband access • DSL and cable modem alternative • Hotspot (inter 802.11) connectivity

  7. Why is 802.11 the Winning Indoor Technology? • 50 million clients today, + 50 million this year • Dramatic cost decreases due to volume • Clients are “free” • Available at multiple locations – homes, hotspots, office, cities, … • Given adoption, R&D will fix any remaining issues with technology 802.11 is to Wireless Communications What the x86 was to Computing and What Ethernet was to Networking

  8. Wireless LAN Evolution Stand Alone Pervasive Multi-site • Email, Web • Email, Web from different locations • Voice and Data • Business applications • Primary connectivity • Stand-aloneAccess Points • Centralized security and management • High Density, Application QoS, Transparent mobility Number of Clients and Coverage Applications Products / Technology

  9. WLAN Product Evolution Coordinated AP’sand Central Appliance Meru Gen 2 + RF Coordination High Density QoS Zero Handoff Aggregated AP’s Cisco 1200+SWAN + some startups + … Gen 1 + Central Mgnt Security Services Stand-alone Cisco 350 Proxim/Agere Linksys Basic Connectivity 2000-01 2003-4 2002-3 3rd Generation 1st Generation 2nd Generation

  10. University Environment Has Special Requirements For WLANs • High Density of Users • in Class Rooms, Library, Common Areas • Very Mobile and “Leading-Edge” User Community • Students – don’t have one “office”; Faculty – moving around • Want to leverage new capabilities in mobile data, voice, video, collaboration … • Security • Semi-autonomous organizational/administrative domains • Access By Different Classes of Users • Students, Faculty, Administrators, Guests • Budgets Constrained – Well this is common! 802.11 Not Designed To Address Some of These Requirements

  11. Key Requirements WLANs With Standard WiFi Clients QoS 5x Number of Voice Calls High Density Meru Air Traffic Control Technology 5X Number of Active Users Transparent Mobility 0X Loss-less Handoff Easy Deployment & Management Security

  12. 802.11 Was Not Designed for DensityBut Problem Can Be Solved Active Users Per AP 100+ Peak Aggregate Throughput in Single Cell Environment Meru AP Performance 11 Baseband + Protocol Overhead 5X 5X 8 5 10-20 Contention Loss Total Bandwidth at Peak (Mbps) Today Meru Today’s APPerformance 1 3 10 Number of Active Users

  13. 6 6 6 6 5.5/11 Mbps 1 Cellsize 1 1 1 1 1 1 1 1 1 1 6 1 X X X X X 1 Mbps Receive Signal Collision Domain 11 11 11 11 11 11 11 11 11 CS Interference domain Distance Effective Client Density Higher Due to Contention Across Cells Interference Range Is Much Larger Than Communications Range …. Causing Contention Across Cells Floor 2 Floor 1 Floor 1 6 • Channel planning no use; same channel one cell away

  14. Dealing with QoS / Real-time Applications on 802.111 Over-the-air QoS Channel Access with Today’s 802.11 AP Channel Access with Meru AP for QoS 12 12 10 10 8 8 6 6 4 4 2 2 5.36 5.36 5.38 5.4 5.42 5.44 5.38 5.4 5.42 5.44 5.46 5.48 5.5 5.52 5.54 5.56 5.46 5.48 5.5 5.52 5.54 5.56 Time (Sec) Time (Sec) No over-the-air QoS MS I D • Unpredictable channel access, latency, jitter • AP gets proportional share of channel as one of the clients • Predictable channel access, latency, jitter • AP gets the right amount of channel access (50%)

  15. 30+ 5X 7-10 < 5 With Right Over-the-Air QoS, 802.11 Can Support Voice and Video at Scale No over-the-air QoS Over-the-air QoS Wired QoS Wired QoS AP Meru AP Today’s AP Standard Client Today’s AP Proprietary Client Meru AP Standard Client Typically on separate channels/network Dynamic mix of voice and data on same channels

  16. Handoff Provides Challenge for VoiceNeed Infrastructure Controlled Handoff Virtual AP Architecture BSSID = ZZ BSSID = ZZ BSSID = XX BSSID = YY 00:00 01:00 Zero-handoff with no loss Meru WLAN Today’s WLAN 300ms – 1 sec between handoff

  17. Sufficient Security Available Today Authentication Encryption Detection • Web • 802.1x + EAP • VPN • WEP • TKIP • WPA • VPN • Rogue Device Detection and Mitigation

  18. Virtual WLANs Over Same Physical WLAN – Advantages in Universities Radius DHCP Layer 2/3 Switch ESSID= Guest Access = VLAN 5 ESSID = Engg = VLAN2 2 3 ESSID = Faculty = VLAN3 ESSID =Business-school = VLAN 4 • Multiple ESSIDs • Guest VLAN • Administrative Control Can Remain at Existing Levels • Configure policies independently: • Primary/Secondary RADIUS • Authentication methods • Encryption policies • DHCP servers • Bandwidth Provisioning • QoS policies • Accounting Per Group VLAN 2 3 4

  19. Deployment and Management …. Becoming Easy Appropriate Channels, Power Levels Set Automatically • Centralized Control and Management • No static frequency planning • Plug and Play Deployment for Access Points Switched/RoutedCorporate Network Controller

  20. New WLANs Have Simple Deployment Architecture Floor 2 AP AP Floor 1 Virtual AP Backbone AP Data Center Meru Controller Leverage Existing Wired Investments • Access Points and Controller Connected Using Existing Wired Switches • Can use existing 802.1x authentication via PEAP, EAP-TLS, LEAP • Simple, Scalable, Cost-Effective

  21. Applications • Replacement of Wired Ethernet • Class Rooms, Dorms, Common Areas • Voice over WLAN • Service to Users • Revenue Generator

  22. Unwiring is the Future • School of Business, Initially Looked to Deploy Wired Ethernet in Classroom at Cost of Approx $40-50K • new switch, wiring, labor • With Predictable 802.11 Network Able to Deal with High Density, Deployed Wireless Network at Cost Savings of 70% • Incremental Classrooms Can be Deployed at Cost-savings of 80% + Provide Improved Service, Applications, Mobility

  23. Why Voice Over Wireless LAN?Compelling Business Case Email, Web access Mobility TotalBenefits of Data-only WLANs Lower wiring costs for data and voice Total Benefits Of WLANs that carry Voice + Data Lower costs for computer moves, adds, changes (MAC) Productivity Improvement from on-campus voice mobility Voice Services To Students Benefits from WLANs

  24. Industry Moving to Support Enterprise Voice over WiFi Good Quality & Features Available in Softphones • Laptops, Desktops • PDAs Wireless Built-into Compute Devices • Laptops • PDAs EnterpriseNetwork Infrastructure 802.11 Voice Devices Coming to Market • 802.11 only Phones • Dual mode (Cellular, WiFi) • Custom devices VoIP Has Achieved Momentum • IP phone lines > Traditional Lines in 2003 • 60% growth in VoIP in 2002 Source: In-Stat 5/03; Dell’Oro 7/03

  25. Why Don’t We See Much More Widespread Deployment Today? • Not Many Handsets Available • Handsets are Expensive • Wi-Fi Infrastructure Does Not Support Enterprise-Grade Voice

  26. Wi-Fi Phones Becoming Available and Cost-Effective • About 10+ WiFi Phones in market in 2004 • Dual mode (WiFi and Cellular in the market in 2H, 2004) • Overall solution pricing and choices becoming very attractive

  27. Dartmouth College, NH • Dartmouth College, NH, is converging voice, video and data onto its wireless IP network • Students can make local and long distance calls free anywhere on campus using IP SoftPhones on their Windows PCs. • Reduced cost and improved communication

  28. Darthmouth College - Applications "No one wants to plug in anymore," says Brad Noblet, the school's director of technical services. About 90% of Dartmouth's freshmen arrived with wireless-enabled laptops. "We've found new ways for professors to teach students and new ways for students to interact, not just with their professors, but amongst themselves and outside people as well," says Noblet. "Students will be able to watch TV on one window, check e-mail on another, and do homework on a third," Noblet explains. "We want to converge media to deliver that content over a common infrastructure."

  29. Voice / Messaging Over WLANRight Communication Paradigm ~ $1M Contribution / Year 10,000 Students $10 / Mo Profit 9 Months Per Year X X = • Service Can Be Offered for “Free” to Users • Improve Service-level to Students • Differentiating Factor for University • Improved Quality of Life • Or Can be Revenue-Generating Offering • Offered in Partnership with Service Provider • Simple economic calculation:

  30. Summary • 802.11-based WLANs Is the Accepted Indoor Wireless Technology • Technical Challenges To Address Some Limitations, Especially in University Settings, are Getting Addressed • Security and management are not the key problems anymore • Integration with WAN Technologies Will Happen Over This Year and Next • The Right WLAN Infrastructure Can be Leveraged To Reduce Costs, Improve Service and Increase Funding!

  31. Thank You Net@EduWireless Networking Meeting Kamal Anand VP Marketing Kamal@merunetworks.com

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