October 4-7, 2004 Los Angeles, CA 1 WiFi Technology WiFi Times Five: How 802.11g Changes the...
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![Page 1: October 4-7, 2004 Los Angeles, CA 1 WiFi Technology WiFi Times Five: How 802.11g Changes the Mobility Picture William Beyda Vice President,](https://reader038.fdocuments.us/reader038/viewer/2022102907/56649d795503460f94a5d110/html5/thumbnails/1.jpg)
October 4-7, 2004 • Los Angeles, CA • www.itexpo.com1
WiFi Technology
WiFi Times Five: How 802.11g Changes the Mobility Picture
William BeydaVice President, Product DevelopmentSiemens Enterprise Networks
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October 4-7, 2004 • Los Angeles, CA • www.itexpo.com2
Overview• Wireless LAN Technology Landscape
– Standards Evolution– WiFi Hot Spots– Wireless LAN Security– Where is WiFi?– Does speed matter?
• The New Mobility– What are the new “killer apps”?
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October 4-7, 2004 • Los Angeles, CA • www.itexpo.com3
Wireless LAN Standards Evolution
• WiFi stands for: Wireless Fidelity, defined by the IEEE
• Standards:– 1999: IEEE 802.11a and 802.11b– 1999: Dual Band IEEE 802.11a&b– 2003: IEEE 802.11g
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802.11a• 54 Mbps maximum
• 8 channels, 64 users per access point
• Operating in the unregulated 5 GHz range– Shorter range than 2.4 GHz but less
interference, up to 150 feet
• Security: Strong 152 bits WEP encryption
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802.11b• 11 Mbps maximum
• 3 channels,32 users per access point
• Operating in the 2.4 GHz range– 300 foot range (interference an issue)
• Security: 48, 64 and 128 bits WEP encryption
• The most widely deployed
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802.11g• 54 Mbps maximum
– Proprietary solutions up to 108 Mbps• 3 channels, 32 users per access point• Operating in the 2.4 GHz range
– 300 foot range (interference an issue)• Security: same as 802.11b - 48, 64 and 128 bits
WEP encryption• Backward compatible with all 802.11b but not with
802.11a• Fast becoming the accepted solution, since cost is
similar to 802.11b equipment
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Dual Band (802.11a & b) Equipment
• 54 Mbps & 11 Mbps
• 8+3 channels, 64 users per access point
• Operating in both 2.4 and 5 GHz ranges
• Security: 152 bits WEP encryption
• Does not support 802.11g (thus does not have high bit rate in long distances)
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Wireless LAN Security• WEP (Wired Equivalent Security)
– 48, 64, 128 for 802.11b,g and 152-bit key for 802.11a
– Supports • Confidentiality – prevents casual eavesdropping• Access Control – Authentication of users• Data Integrity – prevents tampering with the messages
– Limitation: does not support key management
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Wireless LAN Security(continued)
• WPA (WiFi Protected Access) – A subset of 802.11i and forward compatible with
802.11i – EAP (Extensible Authentication Protocol)
Authentication based on 802.1X– Temporal Key Integrity Protocol (TKIP)
encryption
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Wireless LAN Security (continued)
• 802.11i Robust Security Network (RSN) is being developed. – Uses TKIP and AES for stronger encryption.– In design phase, expected in 2005
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Wireless LAN Security (continued)
• VPN to create a private network over Wireless LAN – Creates a virtual tunnel – Encrypts data at the sending end and decrypt at
the receiving end– Uses IPSec, L2TP and PPTP for tunneling, and
3DES and AES for encryption
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Where is WiFi?• At work, providing connectivity for those who
spend their time in meeting rooms– Laptops and most PDAs have WiFi built in– Next generation cell phones will be dual mode, GPRS
and WiFi • At home, where wiring can be expensive and
unattractive– Flexibility, anywhere in the house, even the backyard– In home appliances, allowing control and data transfer
• Internet connected refrigerator• Home entertainment center
• Hot spots
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How Many Hot Spots?• Over 30,000 commercial Access Points
(AP) are available today. Reaching 100,000 by end of 2004
• Over 4 Million Access Points already sold • An organic phenomenon….they are
sprouting up everywhere
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Where are the WiFi Hot Spots?• Many airports and hotels• Most Starbucks coffee shops• Most McDonalds restaurants• Throughout the streets of Manhattan, San
Jose, and numerous other cities• Most campuses and academic institutes• At base camp on Mount Everest!
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Does speed matter?• 802.11b offers a nominal 11 Mbps, but in
places with poor coverage, users might achieve speeds of only a few Mbps in certain areas
• This few Mbps would be shared among all users
• Short emails, normal VOIP conversations could succeed with these speeds
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Does speed matter?• Collaboration on large documents,
presentations, exchanging video clips, etc. is frustrating at low speeds
• 802.11g, with it’s nominal 54 Mbps, should ensure that even in the edges of the coverage area, bandwidth exceeds 10 Mbps, providing more than enough for serious video applications
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The New Mobility – Presence & Availability
• Presence & Availability change the way business communications is conducted
• Allows a caller to view the destination’s availability before making the call
• Allows users to decide who get to see their presence
• Telephony features such as repeat dialing and camp-on become obsolete
• Next generation communication products have presence-based call routing
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Wireless Makes Presence and Availability Ubiquitous
• Wireless LAN technology mobilize these new features allowing Mobile Presence to span conference rooms, meetings, hot-desking and teleworking
• The high bandwidth of Wireless LAN is the enabling technology, because of frequent presence status changes across all users
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The New Mobility – Instant Messaging
• Instant Messaging is a real-time text based communication which is less obtrusive than voice calls
• Allows multiple-IM sessions in parallel• Allows multiple-user IM sessions• Allows urgent communications during
meetings without the disruptive nature of cell phone communication
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The New Mobility – Instant Messaging
• Highly accessible through firewalls and corporate boundaries
• Combines internal / external users (using generic IM servers such as MS Passport)
• Wireless LAN technology enables these new capabilities allowing mobile users and Teleworkers to exchange IMs while in a meeting, on a business trip, and on the go connecting from a hot-spot
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The New Mobility – Video Conferencing
• Video Conferencing was expensive requiring dedicated video conferencing rooms– Per conference room cost of $10- $50K and include the TV
sets, video conferencing controller, one or two cameras, foils scanner, ISDN equipment, etc.
– The bandwidth of such configuration was up to 3 ISDN lines, i.e., 384 Kbps
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The New Mobility – Video Conferencing
• The new trend is Personal Video Conferencing– Low cost USB camera, SW (like MSN Messenger) and IP
communications– MCU-based or direct peer-to-peer connectivity– Costs less than $100 per user
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The New Mobility – Video Conferencing
• Wireless LAN technology enables mobile video conferencing using a laptop or PDA from a hot spot
• The high bandwidth allows multiple users to share the bandwidth and still have a high quality conferencing experience
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The New Mobility – Data Collaboration
• Data Collaboration is the fastest growing communication paradigm– WebEx, LiveMeeting, WorkPlace
• Enables users to share their work across the network
• Saves travel time and money• Data Sharing• Application Sharing
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The New Mobility – Data Collaboration
• Web-based or using proprietary dedicated clients (like Microsoft NetMeeting)
• Usually combined with voice or video conferencing• High-bandwidth wireless LAN technology provides
enough bandwidth to allow multiple users to fully participate in a virtual personal video conferencing and data collaboration session!
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OpenScape – An example of the new breed of communications
OpenScape creates intelligent relationships among all enterprise communication resources increasing the productivity of both workers and communication services by facilitating rich,
successful communications on the first attempt
Key Features: One-and-done communications
Give the users intelligent control of communications Eliminates unproductive communication steps Eliminates unwelcome communication intrusions
Presence aware workgroup collaborations More efficient set-up of group communications Provides a common interaction model for individuals and teams One touch multi-media conferencing at any time Managed coordination of participants and documents
Elevate productivity while containing communication costs Provide a powerful SDK
Allows ISV’s and SI’s to customize for vertical markets Web service integrations allows partner to deliver unique add to the customer
Media Independent
Device Independent
Application Independent
PBX Independence
Multi-Platform Access
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Examples of Identity Context Values
• Individual– In Office– Working Remotely– Be Right Back– In Meeting– On Business Trip– Out Of Office– On Vacation– No Interruptions– Unknown
• Workgroup– Active– Inactive
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Scenario: Changing planes at O'Hare, one
hour to spare• User enters airline lounge, turns on
laptop, connects to corporate OpenScape server through WiFi connection using a VPN
• User reviews presence of some individuals, decides to launch an ad-hoc workgroup collaboration session
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Scenario: Changing planes at O'Hare, one
hour to spare• User can select headset on PC, or cell
phone, based on OpenScape audio rules or current preference
• Voice conference launched first, more users added on the fly
• Webex launched mid-session
• Video can be added as well using camera on laptop
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OpenScape “My Contacts” Portlet
Identity Contexts Aggregated Media Contexts
Contacts
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OpenScape Web Portal
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OpenScape Workgroup Portal
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OpenScape Outlook Access
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Example: WebEx Web Collaboration
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Other devices make it even easier!
• A smart cell phone • Standard PDAs,
can handle this task, so a laptop is not even needed
• Smart phones with PDA features are another option
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Your mobility advantage
• Users finally have access to a full-suite of collaboration tools almost everywhere
• Ubiquitous WiFi assures you a high-bandwidth connection almost anywhere
• A simple cell phone will be looked upon as a primitive device used only for one-to-one voice communications
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The future of mobility
• A PDA/smart cell-phone with PDA features, or a laptop with headset, will become the preferred device for entering and launching conference calls for mobile workers, teleworkers and travelers
• WiFi on airplanes extends this phenomenon to the sky (e.g. Connexion by Boeing )
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The future of mobility
• A new breed of mobile worker is born!
• Always connected, with no penalty for being mobile.
• Presence and availability apps make the real difference for mobility.
• The killer apps are here, and there’s no turning back.