Transcript Applications

Inside Wireless
Voice and Data
Net@Edu
Wireless Networking Meeting
Kamal Anand
VP Marketing
[email protected]
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
2
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
3
Wireless Standards
Focus of
Discussion
WAN
IEEE 802.16e
WirelessMAN
IEEE 802.20
(proposed)
MAN
IEEE 802.16
WirelessMAN
IEEE 802.21
IEEE 802.11
WirelessLAN
LAN
PAN
IEEE 802.15
Bluetooth
4
Bluetooth Applications
 Bluetooth technology
► Designed for personal
area networking (PAN)
► Short-range, Low Power
 Products
► Cellular phones
► Headsets
► PDAs
► Keyboards and mice
5
WiMAX Applications
 Metropolitan area network
(MAN) technology
- Connection-oriented
- QoS
- Line of sight and nonline of sight
 Based on IEEE 802.16 and
ETSI HIPERMAN
standards
 Applications
►
►
►
6
Last-mile broadband
access
DSL and cable
modem alternative
Hotspot (inter 802.11)
connectivity
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
7
Wireless LAN Evolution
Stand Alone
Multi-site
Pervasive
Number of
Clients and
Coverage
Applications • Email, Web
Products /
Technology
• Stand-alone
Access Points
• Email, Web from
different locations
• Voice and Data
• Business applications
• Primary connectivity
• Centralized
security and
management
• High Density,
Application QoS,
Transparent mobility
8
WLAN Product Evolution
Coordinated AP’s
and Central Appliance
Aggregated AP’s
Stand-alone
Cisco 350
Proxim/Agere
Linksys
Basic
Connectivity
2000-01
1st
Generation
Cisco 1200+SWAN
+ some startups
+…
Gen 1 +
Central Mgnt
Security
2002-3
2nd Generation
9
Meru
Gen 2 +
RF Coordination
High Density
QoS
Zero Handoff
2003-4
3rd Generation
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
10
Key Requirements WLANs
With Standard WiFi Clients
QoS
Meru
Air Traffic
Control
Technology
5x Number of Voice Calls
High Density
Transparent Mobility
Easy Deployment &
Management
Security
11
5X Number of Active Users
0X Loss-less Handoff
802.11 Was Not Designed for Density
But Problem Can Be Solved
Active Users Per AP
100+
11
Baseband + Protocol Overhead
8
(Mbps)
Total Bandwidth at Peak
Peak Aggregate Throughput
in Single Cell Environment
Meru AP
Performance
5
Contention
Loss
1
5X
5X
10-20
Today’s AP
Performance
3
Today
10
Number of Active Users
12
Meru
Effective Client Density Higher Due
to Contention Across Cells
Interference Range Is Much Larger
Than Communications Range
…. Causing Contention Across Cells
1
Receive Signal
5.5/11
Mbps
1
Mbps
CS
11
Cell
size
Floor 2
11
6
1
1
X 1
1
11
X
6
X1
11
1
Floor 1
Floor 1
11
16
1
6
61
X1
X
116
11
11
1
11
Collision
Domain
Interference
domain
Distance
 Channel planning no use;
same channel one cell away
13
Dealing with QoS / Real-time
Applications on 802.111
No over-the-air QoS
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 5.38
5.4
5.42 5.44 5.46 5.48 5.5
Time (Sec)
5.36 5.38
5.52 5.54 5.56
• Unpredictable channel access,
latency, jitter
5.4
5.42 5.44 5.46 5.48 5.5 5.52 5.54 5.56
Time (Sec)
• Predictable channel access,
latency, jitter
• AP gets the right amount of
channel access (50%)
• AP gets proportional share of
channel as one of the clients
14
With Right Over-the-Air QoS,
802.11 Can Support Voice and Video at Scale
No
over-the-air
QoS
AP
Over-the-air
QoS
Wired
QoS
Meru AP
Wired
QoS
30+
5X
<5
Today’s AP
Standard Client
7-10
Today’s AP
Proprietary Client
Typically on separate
channels/network
Meru AP
Standard Client
Dynamic mix of voice
and data on same channels
15
Handoff Provides Challenge for Voice
Need Infrastructure Controlled Handoff
Today’s WLAN
Meru WLAN
Virtual AP Architecture
BSSID = XX
BSSID = ZZ
BSSID = YY
BSSID = ZZ
00:00
01:00
300ms – 1 sec between handoff
Zero-handoff with no loss
16
Sufficient Security Available Today
 WEP
 Web
 TKIP
 802.1x + EAP
 WPA
 VPN
 VPN
Detection
 Rogue Device
Detection and Mitigation
17
Virtual WLANs Over Same Physical
WLAN – Advantages in Universities
 Multiple ESSIDs
► Guest VLAN
Radius
 Administrative Control Can
DHCP
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
18
Layer 2/3
Switch
ESSID =
Engg
= VLAN2
3
4
ESSID =
Faculty
= VLAN3
2
3
ESSID= Guest
Access = VLAN 5
ESSID =
Business-school
= VLAN 4
Deployment and Management
…. Becoming Easy
 Centralized Control and
Appropriate Channels, Power Levels
Set Automatically
Management
 No static frequency planning
 Plug and Play Deployment
for Access Points
Switched/Routed
Corporate Network
Controller
19
New WLANs Have Simple
Deployment Architecture
Leverage Existing Wired Investments
Floor 2
AP
Controller Connected
Using Existing Wired
Switches
AP
Virtual AP
 Access Points and
Floor 1
 Can use existing 802.1x
Backbone
AP
authentication via PEAP,
EAP-TLS, LEAP
 Simple, Scalable, Cost-
Data Center
Effective
Meru Controller
20
Applications
 Replacement of Wired Ethernet
►
Class Rooms, Dorms, Common Areas
 Voice over WLAN
Service to Users
► Revenue Generator
►
21
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 Costsavings of 80%
+
Provide Improved Service, Applications, Mobility
22
Why Voice Over Wireless LAN?
Compelling Business Case
Benefits from WLANs
Email,
Web access
Mobility
Total
Benefits
of Data-only
WLANs
Lower costs for
computer moves,
adds, changes
(MAC)
Lower wiring costs
for data and voice
Productivity
Improvement from
on-campus
voice mobility
23
Total Benefits
Of WLANs that
carry Voice + Data
Voice Services
To
Students
Industry Moving to Support Enterprise
Voice over WiFi
Good Quality & Features
Available in Softphones
Wireless Built-into
Compute Devices
 Laptops
 Laptops, Desktops
 PDAs
 PDAs
Enterprise
Network Infrastructure
802.11 Voice Devices
Coming to Market
VoIP Has Achieved
Momentum

 IP phone lines > Traditional
802.11 only Phones
 Dual mode (Cellular, WiFi)
 Custom devices
Lines in 2003
 60% growth in VoIP in 2002
Source: In-Stat 5/03; Dell’Oro 7/03
24
Why Don’t We See Much More
Widespread Deployment Today?
1. Not Many Handsets Available
2. Handsets are Expensive
3. Wi-Fi Infrastructure Does Not Support
Enterprise-Grade Voice
25
Wi-Fi Phones Becoming Available
and Cost-Effective
$ Per Phone
Price Decline of WiFi Phone
800
700
600
500
400
300
200
100
0
 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
2002
2003
2004
2005
26
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
27
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."
28
Voice / Messaging Over WLAN
Right Communication Paradigm
 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:
10,000 X
Students
$10 / Mo
Profit
X 9 Months
Per Year
29
=
~ $1M
Contribution /
Year
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!
30
Thank You
Net@Edu
Wireless Networking Meeting
Kamal Anand
VP Marketing
[email protected]