networking the household wayne caswell homerf communications chairman separating the home from the...
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Networking The Household
Wayne CaswellHomeRF Communications Chairman
Separating the Home from the Workplace
HomeNET Forum: Winter 2001
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Separating the Home from the Workplace
Do Technologies move Up-market or Down?
Telecommuting & Mobility(Benefits of Work-at-Home)
Environmental Differences(Home Network issues)
Application Differences
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Do Technologies move Up-market or Down?
Enterprises loaded OS/2.Window was preloaded.
Users familiar with Windows.
IBM PC introduced in 1981, butnot sold in Enterprises until 1984.
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Technologies move Up-market, not Down.
Peer Networking
CD-ROM, Sound Card, DVD
Mobile Phones
Digital Cameras, Color Printers
Even Sales Force Automation
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Telecommuting & Mobility
BENEFITS Improved Morale (60%) Employee Work / Life Balance (43%) Office Real Estate Savings (33%) Flexibility in Hiring (parent w/ kids) More Customer Face-time
ROAD BLOCKS Mid-Management Objection (25%) Inadequate IT (19%)
The 15 second commute.
Always available.(Source: Kinetic Workplace survey prior to September 11)
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Environmental Differences - Enterprise Offices
Hollow Walls Hung Ceilings Raised Floors NW Administrators Corporate Budget Hard Surfaces (wireless reflections)
Similarity Desktop PCs dominate
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Environmental Differences - Homes
Fire Blocks Slab Foundations Land Lords Local Mobility Voice, Data, Music, TV Mom (as admin?) Personal Budget Soft Carpet (wireless absorption)
Similarity Desktop PCs dominate
Ethernet along the baseboard
and to adjacent bedrooms
Wireless for Convenience
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Application Differences - Enterprise Offices
Data Applications• E-mail
• Microsoft Office
• Application Servers
• SAP
Remote Access• Customers, Homes,
Hotels
• VPN Security
• Campus Roaming(wireless)
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Application Differences - Homes
Extends Beyond DATA• E-mail, Web browsing,
Gaming, Photo editing, Microsoft Works
• Digital Music
• Television
• TelephoneCommunications
Local Mobility• Some Remote Access
through Home Gateway
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Information,Communications, and Entertainment Markets are Converging
Home Home NetworkingNetworking
Voice, Data,Voice, Data,and Entertainmentand Entertainment
Set Top Box
CommunicationCommunication InformationInformation
Web Pad
PDA
Entertainment Entertainment
ModemPhone
BROADBANDBROADBANDCable, xDSL, ...Cable, xDSL, ...
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20.6
28.231.3
39.743.4
0.84.5
0
5
10
15
20
25
30
35
40
45
50
1996 1997 1998 1999 2000
Sal
es (
M u
nit
s)
Cordless Phones Wireless LANs
+37%
+11%
+27%+9%
Sources : CEA & Intersil
US Cordless Phone Market
900
MH
z
2.4
GH
z
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Multi-Line, Multi-User Phones are Voice Only Home Networks
POTSPOTS
VoiceDevice
VoiceDevice
VoiceDevice
ISDNISDN
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True Home Networking includes Information, Communications, Entertainment
POTSPOTSISDNISDN
xDSLxDSLCableCable
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Existing Upper Layers
TCP UDP
IPDECT
HomeRF MAC Layer
HomeRF PHY Layer
CSMA/CAPriorityCSMA TDMA
HomeRF Network Layers
“Ethernet”Data Path
StreamingMedia Path
Toll-QualityVoice Path
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PC Services on Handset Display
PC controls thehandset display, receives all key presses.
First Step:First Step:Text menusText display
Next Steps:Next Steps:Scripting ExtensionsUPnP ProxySDKSpeech recognitionText-to-Speech
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Bandwidth Requirements
Application Speed Requirement
Text 300 bps
Telephone 8-64 Kbps
Color Image 25 KB – 2,500 KB
Digital Photos 1,000–10,000 KB
Digital Music 128–700 Kbps
Video Conferencing 384-2,000 Kbps
MPEG-4 VoD (VCR/DVD) 250-750 Kbps
HDTV (compressed) 20,000 Kbps
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Wireless Choices for the Broadband Internet home
- Advantage ~ - Adequate X - DisadvantageLegend:
X ~
X ~
Roaming Outside the Home ~ ~ ~
ATTRIBUTE HomeRF Bluetooth 802.11b
Cost
Security
Interference Immunity
Toll-Quality Voice Support
Streaming Media Support
Data Throughput
Range
Power Consumption
Form Factor
Network Topology
~ X
~ X
~
X
X
X ~
X ~
~ ~
~
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Homes have More Absorption, Less Reflection
Signals can arrive at different times and cancel each other out.
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Advertised Data Rate: 11 Mbps
1 Mbps
5 Mbps
2 Mbps
~1 Mbps
~0.5 Mbps
Throughput
~5 Mbps
~2.5 Mbps
0’ 50’ 90’ 130’ 300’
RANGE: Signal Strength Diminishes with Distance
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Performance over DistanceHomeRF 2.0 vs. 802.11b
0
1
2
3
4
5
6
10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 110' 120' 130' 140' 150'
802.11b HRF 2.0
No
min
al t
hro
ug
hp
ut
(Mb
ps)
Broadband/ MPG 4 Video
MPEG2 Video
Dial-up / MP3 Audio
Source: Practical and Theoretical Calculations
HomeRF provides real-time media streaming to more nodes over a greater distance.
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ATTENUATION: Signal Strength Diminishes through Materials
BU
ILD
ING
WA
LL
Wood and plaster Walls or Floors are OK. Even Brick.
Metal and thick rock block the RF signals.
The Higher the Frequency, the more signal loss.
5 GHz is worse than 2.4 GHz.
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HomeRF Does Not Compromise Security …… Like Wi-Fi Does
BU
ILD
ING
WA
LL
Trivial task to bypass Wi-Fi
security w/ standard products
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Gateways offer Firewall SecurityBut Power Line & RF extend Outdoors,
InternetEthernet
HomePNA or HomePlug
so beware of Compromises!
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HomeRF is Neighbor Friendly
ideal for Broadbandavoids Interference
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HomeRF Hops Out of InterferenceFHSS DSSS
TimeTime
Freq
uenc
y
IEEE 802.11b waits for Interference to go away
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HomeRF
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Thank you
Wayne.Caswell@ ICM.Siemens.com