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1
RF Network Planning Tools for Campus Environments
Ben HentyDr. Eric Reifsneider
www.wirelessvalley.com
March 27, 2001
Conference on Wireless Campus Networks
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Planning Tool History: Macrocell Design
• Original use of planning tools was outdoor cellular networks
• Planning tools became widely accepted• Planning decisions could be simulated
and analyzed prior to deployment• Design strategies and techniques
improved• Cell tower designs became more
efficient
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
3
• Campuses and large enterprises need planned wireless internet and cellular/PCS strategy
• Campus environments require ongoing facilities management and present unique wireless planning challenges
• In-building wireless deployment in its infancy but will explode with Wireless Office, Wireless LANs, Wireless Video, VoIP, Bluetooth, and Wireless PDAs.
Wireless Access Issues on Campus
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
4
Why Campus/Indoor Wireless Access Points?
• Shared classrooms and public areas need coverage
• Universities have highly mobile pool of techno-savvy users
• Coverage and capacity demands of current wireless users
• Customers need and want indoor service• Cost savings through integrated services
and billing
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
5
Service Types
• Cellular/PCS/WAP
• Wireless Office Service
• Wireless LAN (IEEE 802.11)
• Wireless PDAs (Compaq IPAQ, Handspring)
• Wireless VoIP
• Wireless Video
• Bluetooth
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
6
Why use an RF Planning Tool?
• Efficient system design while minimizing costs and providing coverage and capacity needs
• Indoor wireless prediction is non-intuitive and complex, but huge cost savings are possible
• Planning tools allow flexibility and rapid “what if” designs to meet building-specific needs
• Easy visualization of side-by-side comparisons between competing or proposed systems/bids
• SitePlanner also allows simultaneous integration of wireless equipment tracking and asset management
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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The SitePlanner® Design Environment
InFielder®
ultra-portable 3-D site-specific
measurements
Predictor™3-D site-specific
design, prediction, asset management
BDM™
3-D site modeling and archiving environment
Optimatic®
optimize 3-D wireless designs
using field measurements
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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SitePlanner 2000 and Add-On Modules Work Together
PalmFielder™ultra-portable 3-D site-specific
measurement, asset management, and visualization of network performance
on the Palm IIICTM
LANFielder™3-D site-specific 802.11b
WLAN measurement
WaveSpyTMLightweight portable fast scanning receiver for all
digital and analog wireless standards
InFielder ® Predictor™
BDM ™Optimatic®
SiteSpy™802.11b WLAN measurement,
traffic generation
SitePlanner ®
GPS Drive-Test Option for WaveSpy
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
9
Point and click with the mouse to visually position wireless system components such as cables, antennas, amplifiers, splitters, and many more!
© 2000 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
SitePlanner® Graphical System Design
Fiber Remote
Leaky Feeder
Antenna
Components are drawn from a customizable Parts List Library consisting of more than 3,000 components from over three dozen manufacturers
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
10
SitePlanner® Built-in Components Database
Parts List Library contains thousands of antennas, amplifiers, cables, splitters, and leaky feeder antennas
Quickly and easily analyze design tradeoffs in terms of cost and performance with the click of the mouse
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
11
SitePlanner® Instant Point PredictionsSitePlanner® Instant Point Predictions
Simply move the mouse cursor and watch in real-time as the composite system coverage is updated and displayed at thatpoint instantly!
Simply move the mouse cursor and watch in real-time as the composite system coverage is updated and displayed at thatpoint instantly!
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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SitePlanner SitePlanner ®® Instant Antenna Positioning Instant Antenna PositioningSitePlanner SitePlanner ®® Instant Antenna Positioning Instant Antenna PositioningMoving the mouse on the screencorresponds to repositioning orre-orienting a selected antenna.The new coverage area of theantenna is updated in real-time!
Moving the mouse on the screencorresponds to repositioning orre-orienting a selected antenna.The new coverage area of theantenna is updated in real-time!
New antenna position Updated
coverageregion
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
13
SitePlanner® Wireless System Layout
Shows antenna system component interconnections graphically
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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SitePlanner® Features and Benefits• Facilitates rapid cost and performance tradeoff
analysis of all technologies at low overall cost
• Simultaneous site design, survey, verification, and documentation with 3D graphical representation
• Automatic archiving of installed infrastructure
• Automatic bill of materials created during design
• Asset management facilities built in
• Cellular, PCS, 3G, WLAN, MMDS, and beyond
• Accurate and practical modeling of any campus wireless system
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
15
RF Planning Objectives
• Satisfaction of Specific Customer Needs
• RF and Network Performance (Coverage and Capacity)
• Minimal Cost (Equipment and Installation)• Cooperation with macrocell systems and
interference minimization
• Ease of installation and integration
• Ongoing infrastructure maintenance
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
16
RF Planning Obstacles• Meeting cost criteria
• Sufficient received signal power (enough, but not too much interference)
• Sufficient capacity to meet user demand
• Signal leakage: only where desired
• Meeting quality of service requirements
• RF Safety concerns (Meeting FCC regulations for indoor measurement)
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
17
Typical Design Steps• Comparison of RF System Technologies
• Use SitePlanner to simulate RF performance of several straw-man designs in facility of interest
• In-situ site survey and measurement with SitePlanner, including throughput or signal strength with transmitter locations from most promising straw-man design
• Use SitePlanner field measurements to optimize network performance and select final layout
• System Installation and Verification
• Regular Maintenance and Design Archiving
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Wireless LAN Planning: LANFielder and SiteSpy
Measurement
results that youcan understand without being an RF Engineer
Provides wireless data network measurement using client/server technique
TM TM
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Case Study: WLAN Design
• 100,000 sq. ft., multi-story academic building on the University of Virginia Tech campus
• Technology:– IEEE 802.11b, 2.4 GHz DSSS– 11 Mbps Cabletron RoamAbout access
points and modems (Lucent/ORiNOCO OEM)
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
20
WLAN Design: 3D Model
10 minutes from CAD file to SitePlanner model
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Predicted signal strength for 3 Wireless LAN Access Points
WLAN Design: Predicted Performance
<60 seconds on PII 300
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Visualizing WLAN Measurements
Required < 1 minute on a Pentium II 300 MHz PC
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
23
Conclusions: WLAN Design
• Rapid predictions enabled analysis of 3 completely different system configurations accompanied by VA Tech CNS engineers
• 3D modeling enabled designer to leverage cross-floor coverage of signal
• Enabled accurate outdoor coverage estimates• Verification measurements validated
predictions to within 3 feet• Complete design (12 access points)
required only an hour and was performed interactively
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Conclusions: WLAN Design• Significant time savings on overall design and
deployment– Verification confirmed an accuracy within 5 dB standard
deviation (predicted vs. measured)– Rapid predictions enabled numerous design tradeoffs
to be analyzed
• Greater RF designer satisfaction– Designer can “see” performance
• Greater building owner satisfaction– Building owner can “see” performance
• Automatic design archiving a key benefit
© 2001 Wireless Valley Communications, Inc. All rights reserved. Patents Pending
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Final Remarks• RF Planning tools ease wireless system design
• allow intelligent design tradeoff and• competitive system analysis and comparisons
• SitePlanner offers a revolutionary design environment that supports visual and textual records required for common procedures, shared strategies, and archiving for any wireless system
• SitePlanner facilitates cost and time savings for rapid deployment and ongoing maintenance for any in-building or campus system
• Come visit our booth for more information about SitePlanner and LANFielder