Transcript dual-mode” wireless telephony

“DUAL-MODE” WIRELESS TELEPHONY:
THE CONVERGENCE OF VoIP + WI-FI + CELLULAR
ERIC BLAUFARB
Marketing Manager
Wireless Networking Business Unit
Cisco Systems
EDUCAUSE
October 19th, 2004
In-Building Wireless
Conference – Feb.’04
© 2004 Cisco Systems, Inc. All rights reserved.
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Agenda
• What is Driving VoIP & Cellular convergence
• What is “Dual-Mode” Wireless Telephony?
• Cisco influence on “Dual-Mode”
• Technical Challenges
In-Building Wireless
Conference – Feb.’04
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Market Growth:
IP Telephony & Wireless LAN
IP Telephony Growth
IP PBX Lines – U.S.
30M
20M
10M
0
1999
2000
2001
2002
2003
2004
2005
2006
% IP Phones  11% 20% 30% 43% 58%
Source: Phillips Infotech, 2002
$Billions
Wireless LAN Growth
$11.0
$10.0
$9.0
$8.0
$7.0
$6.0
$5.0
$4.0
$3.0
$2.0
$1.0
$0.0
$10.3
$9.0
$6.0
$3.3
$2.6
$1.7
2001
2002
2003
2004
2005
2006
Source: Forward Concepts, 2003
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Conference – Feb.’04
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Dual-Mode in Different Environments
• Home – As reliability for VoIP increase through providers such
as Vonage the expectation is WLAN is a logical extension –
Linksys to leverage technology
• Enterprise Campus – As wired VoIP infrastructures become
pervasive and dual mode cellular becomes a “non-purchase
decision” organizations will logically begin to support VoIP
over WLAN as an inexpensive mobility enhancement
• Small Business / Branch Office – Branch office provides the
greatest benefit for VoIP convergence and WLAN/VoIP
integration. Decrease the complexities of wired networks ,
drives down OPEX & CAPEX costs provides increased facility
flexibility & provides greater freedom for employees
• Hotspots – Least likely to have immediate benefits from
VoIP/WLAN convergence
In-Building Wireless
Conference – Feb.’04
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Dual-Mode Wireless Telephony:
Value Proposition – Education
– Dual-mode cellular phones expected to be upgraded more often than
desktop PBX phones
– Extra expense for enterprise calls received while off-campus (these calls
will be automatically routed over the cellular network instead of going to
your PBX voicemail)
+
+
+
+
+
+
Mobility (a cordless phone for the office)
Fewer devices to carry around
Enhanced in-building wireless coverage
Lowered OPEX costs
Increased Productivity, Increased Responsiveness
Largest Deployments are University Medical Centers (cellular
restrictions)
+ Increase University Public Safety
+ Access to voice supplementary services and integrated data applications
Corporate Directory
Calendar
Instant Messaging
+ Single wired/wireless network for voice & data (reduced IT costs)
In-Building Wireless
Conference – Feb.’04
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Single-Mode vs. Dual-Mode Phones
Single-Mode (Wi-Fi only)
Dual-Mode (Wi-Fi + Cellular)
• Available today
• Provides
mobility within
campus
environmnets
• Future
• Can be used both
inside and
outside the
enterprise
Where will these products fit within your organization?
• Single mode = Vertical applications
• Dual Mode = Standard Horizontal
•Dual mode devices drive infrastructure deployments
•User driven adoption less demanding as alternative
technology is in place
•CAPEX justification and applications will drive adoption
In-Building Wireless
Conference – Feb.’04
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“Dual-Mode” Wireless
Telephony Evolution
WLAN
+
IP
Telephony
WLAN VoIP
Telephony
Dual-Mode
Wireless
Telephony
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Conference – Feb.’04
Traditional
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Breakthrough Form Factors
Dual Mode Wi-Fi & Cellular Integration
• http://www.cisco.com/go/ciscocompatible/wireless
Nokia 9500 Communicator
802.11b CCX for Data
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Conference – Feb.’04
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Cisco Compatible Extensions
VoWLAN Features
Available Today (CCX v2/v3):
• Fast Secure Layer 2 Roaming (LEAP, EAP-FAST)
• Fast Secure Layer 3 Roaming (LEAP, EAP-FAST)
• Transmit Power Sync
Reduces interference, Improves talktime
• Proxy ARP Information Element
These features
are included in
CCX
Improves standby battery life
• Pre-standard QoS
Roadmap(CCX v4):
• WMM Standards-based QoS
• Call Admission Control
• Troubleshooting Tools
• UPSD
Improves talktime battery life
• Fast Secure Roaming with additional EAP types
In-Building Wireless
Conference – Feb.’04
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CCX v2.0 v3.0 CCX v4 Features
Security
Voice Enhancements
• PEAP with EAP-GTC
• UPSD
• Standard TKIP with LEAP and
PEAP/GTC
• TSPEC
• CAC
• EAP-FAST
• Voice Matrix
• CCKM with EAP-FAST
Performance and Management
• AES
• CCKM with TLS, PEAP-GTC, PEAPMS-CHAP
• AP-assisted roaming
• Fast 802.1X reauthentication
• Network Admission Control
• Radio environment reporting
• EAP-FAST Enhancements
• Transmit power control
• CCX version control
VLANs and QoS
• Single Signon
• Multiple SSIDs/VLANs on AP
• Proxy ARP
• Pre-standard eDCF
• L2 Roaming Enhancements
• WiFi QoS WME
• Client Enhancement
• SSIDL/MBSSID
In-Building Wireless
Conference – Feb.’04
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In the Future, There Will Be Many VoWLAN
Devices
802.11
Voice Client
Dual-Mode
802.11
Cellular
Phone
PDA/Phone
802.11 Phone
Multiple Products
Multiple Form Factors
Multiple Vendors
Desktop IP Phone
with 802.11
Ethernet Client
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Conference – Feb.’04
Data Collection
Device with
Softphone
All Made
“Cisco-Compatible”
through CCX
Laptop with Softphone
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Technical Challenges
Security
Mobility
Call Quality
Battery Life
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Conference – Feb.’04
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What are the requirements to support VoIP
convergence?
• Good Voice Quality
• Security
• Fast Roaming
• Ubiquitous Coverage
• Scalability
• Long Battery Life
• Troubleshooting Tools
• Minimal RF Interference
ONE NETWORK
• Voice + Data
• Wired + Wireless
• Enterprise Features
In-Building Wireless
Conference – Feb.’04
Cisco SWAN
Centralized Servers
ACS
CiscoWorks WLSE
Switches
Edge Switches
Wireless
Access
Points
Cat 6500 Series WLSM
BR1300
AP1200
AP1100
Cisco-brand
& CiscoCompatible
Clients
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Fast Secure Layer 2 Roaming
Central
Authentication
Server
Security
Si
WAN Link
+
Mobility
+
Call Quality
*WDS
*WDS = Wireless Domain Server
(Local Authentication Server +
Access Point)
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Conference – Feb.’04
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Fast, Secure L3 Roaming
Required service for reliable VoIP
1. APs and clients authenticate
via central WLSM Module
2. Clients securely Fast Layer 3
roam (<50 ms handoff times)
CiscoWorks WLSE
3. Support >300 AP’s
4. Support >2000 VoIP clients
CiscoSecure ACS
RM
RM
RM
In-Building Wireless
Conference – Feb.’04
10.1.1.1
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Deploying VoWLAN:
Recommendations & Best Practices
To run voice over your WLAN, now or in the future, here are some
things to consider as you design/deploy your WLAN network:
• VLANs – Voice should be on a separate VLAN from data
• AP Coverage – VoWLAN phones, which are used while the
user is in motion, can expose coverage “holes”
• Interference – Voice apps won’t perform well if there is a lot
of AP-to-AP interference, so a good site survey is
important
• Capacity – To ensure sufficient voice call capacity, plus
support data traffic, you may need more AP’s, and will
want to use 56 Mbps protocols like 802.11a & 802.11g
• 802.11a Upgradability – Many future VoWLAN devices will
use .11a or .11a/b/g radios (more capacity, more channels),
so be sure your network can be upgraded to 802.11a/b/g
Cisco White Paper: “Cisco Wireless IP Phone 7920 Deployment Recommendations”
http://wwwin.cisco.com/eag/wnbu/tech_resources/white_papers.shtml
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Conference – Feb.’04
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