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Communicating with RWIS Using Spread Spectrum Technologies Alaska Department of Transportation & Public Facilities
Jack Stickel 2004 NATMEC
Road Weather Information System • • • •
Atmospheric observations Surface and subsurface (17”) data Temperature Data Probe (TDP) to 72” Images (24k) - low light, PTZ – Supports multiple users (FAA,NWS,military)
• Additional sensors supplied by – National Weather Service (rain gauges) – University of Alaska @ Fairbanks Geophysical Institute (rain gauges, pressure, solar radiation) 2004 NATMEC
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RWIS Deployment • Phase I - 2001 – 8 sites in Anchorage area – Prototype lessons learned - to test deployment concepts, communication networks, and equipment reliability
• Phase II: 2003 - 2005 – Statewide on the major roads – New communication solutions – Design changes, new/additional sensors & cameras 2004 NATMEC
RWIS Communication Issues • Infrastructure – Coverage - cell and POTS – Slow transmission - local State networks – High cost - long distance and cell
• Geographic & Environmental – Line of sight communication – Wind and rime icing – High construction costs
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DOT Spread Spectrum Experience • “Radio Telemetry for Three RWIS Cellular Sites” Engineering and Environmental Internet Solutions, LCC, Dec 20, 2001
• Request For Proposals (RFP 253002) Phase II Road Weather Information Systems State of Alaska, Department of Transportation and Public Facilities, Jul 3, 2002
• “RWIS Communications Analysis”, Surface Systems Inc (SSI) and Engineering and Environmental Internet Solutions (EEInternet), Dec 2002 2004 NATMEC
Communications Analysis RFP required a detailed look at communication opportunities at each potential RWIS location to:
• • • • • •
Maximize State Wide Area Network Provide polling from multiple locations Focus on POTS local calling areas Explore Internet technologies Look at GEO-broadband satellites Test spread spectrum technologies in an RWIS configuration 2004 NATMEC
Spread SpectrumProven Technology In Alaska • Juneau Wind Profiler - UCAR http://juneau-winds1.rap.ucar.edu/JuneauOps/combo_table.html
• Alaska Railroad Avalanche Program http://www.akrr.com/community/hourly_rpt.htm
• University of Alaska @ Fairbanks Water and Environmental Research Center http://www.uaf.edu/water/projects/atlas/metdata/atlasmetsitemap.htm http://www.uaf.edu/water/projects/cpcrw/metdata/cpcrwmetsitemap.htm
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Spread Spectrum Communication • Technology - radio changes between available frequencies on user selected pattern or uses only selected slots of available frequencies for security and to minimize interference • Operates in the FCC industrial, scientific, and medical bands – 902 - 928 Mhz, no licensing required
• Minimum range (line of sight) - 20 miles
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Spread Spectrum Communication • Multiple operation modes – Point-to-point – Point-to-multipoint – Store-and-forward repeater
• Multiple operation modes – Data Speeds RS 232 1,200 baud to 115.2 K baud
• Power requirements 9.5 to 32 Volts DC
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Spread Spectrum Antennas • 3 dB Omni-directional – Lower performance – Environmentally less sensitive – Multi-site capability (point to multi-point)
• 10 dB Yagi directional – Better performance – Environmentally sensitive to rime icing – Is capable for multiple RWIS capability (master to slave)
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Statewide RWIS Server Network Architecture RAIN
RPU
RPU SNOW
RWIS Server
Oracle Southeast Region
Northern Region
ICE RWIS Server
FTP Server
RPU
Web Server
Web Server
DOT&PF
Public
Central Region
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RWIS Communication Paths
FIELD Cameras
Atmospheric Observations
Roadbed Conditions
Spread Spectrum
Surface Systems Inc Remote Processing Unit (RPU)
COMM INFRASTRUCTURE
Temperature Data Probes
Supplemental Sensors
SCS SCS
Spread Spectrum
SCS Spread Spectrum
Dialup Telephone
Spread Spectrum
Ethernet WAN
ADOT&PF CENTERS Surface Systems Inc Polling Server MS Sequel Database
Dialup WAN
Internet
FTP Server SSI ScanWebTM Traveler Info Systems
Public Web Site
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Local Dialup Link to RWIS
Server Modem
RPU Modem
RPU RWIS Server
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Local Dialup Link to RWIS Protocol Stack Server Server Modem Phone Connection RPU Modem ESS RPU Communication Session Timings
ESS/SNMP/UDP/IP/SLIP/RS-232 Windows 2000 Professional, Service Pack 2.0 Remote Access Service (RAS) 3Com Courier 56K V. Everything External Modem Internal PBX Phone System 3Com Courier 56K V. Everything External Modem SLIP RS-232 BPS: 19200 Data: 8 data bits No Parity Stop bit Average RWIS Data Sessions: 28 seconds Average RWIS + Video (24KB JPEG Image File) Data Session: 2 minutes 20 seconds
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Local Dialup Wireless Serial Link to RWIS
Server Modem
RPU Modem
Master
Spread Spectrum RWIS Server
Slave
Spread Spectrum
RPU
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Local Dialup Wireless Serial Link to RWIS Protocol Stack Server Server Modem Phone Connection Relay Radio Repeater Radio
RPU Radio
ESS RPU
Communication Session Timings
ESS/SNMP/UDP/IP/SLIP/RS-232 Windows 2000 Professional, Service Pack 2.0 Remote Access Service (RAS) 3Com Courier 56K V.Everything External Modem Internal PBX Phone System FreewaveTM Model FGR-115RC Mode: Point to Point Master BPS: 19200 Data: 8 Data bits No Parity 1 Stop bit Antenna: 900 MHZ Omni & Yagi (location dependent) FreewaveTM Model FGR-115RC Mode: Point to Point Repeater Antenna: 900 MHZ Omni & Yagi (location dependent) FreewaveTM Model FGR-115RC Mode: Point to Point Slave BPS: 19200 Data: 8 Data bits No Parity 1 Stop bit Antenna: 900 MHZ Omni & Yagi (location dependent) SLIP RS-232 BPS: 19200 Data: 8 data bits No Parity Stop bit Average RWIS Data Sessions: 55 seconds Average RWIS + Video (24KB JPEG Image File) Data Session: 4 minutes 12 seconds
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Remote Dialup Link to RWIS With Secure Console Server
Server Modem
WAN
Secure Console Server
RWIS Server
RPU Modem
RPU
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Remote Dialup Link to RWIS With Secure Console Server Protocol Stack Server Network Secure Console Server Server Modem Phone Connection RPU Modem ESS RPU Communication Session Timings
ESS/SNMP/UDP/IP/SLIP/RS-232 Windows 2000 Professional, Service Pack 2.0 Remote Access Service (RAS) Lantronix Secure Console Server Driver 10/100 Ethernet Switch Lantronix SCS 100/200 3Com Courier 56K V. Everything External Modem Internal PBX Phone System 3Com Courier 56K V. Everything External Modem SLIP RS-232 BPS: 19200 Data: 8 data bits No Parity Stop bit Average RWIS Data Sessions: 28 seconds Average RWIS + Video (24KB JPEG Image File) Data Session: 2 minutes 20 seconds
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Remote Wireless Serial Link to RWIS With Secure Console Server Master
WEB
Secure Console Server
Spread Spectrum
RWIS Server
Slave
Spread Spectrum
RPU
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Remote Wireless Serial Link to RWIS With Secure Console Server Protocol Stack Server Network Secure Console Server Relay Radio Repeater Radio
RPU Radio
ESS RPU
Communication Session Timings
ESS/SNMP/PMPP/RS-232 Windows 2000 Professional, Service Pack 2.0 Lantronix Secure Console Server Driver 10/100Base-T Router Lantronix SCS 100 FreewaveTM Model FGR-115RC Mode: Point to Point Master BPS: 19200 Data: 8 Data bits No Parity 1 Stop bit Antenna: 900 MHZ Omni & Yagi (location dependent) FreewaveTM Model FGR-115RC Mode: Point to Point Repeater Antenna: 900 MHZ Omni & Yagi (location dependent) FreewaveTM Model FGR-115RC Mode: Point to Point Slave BPS: 19200 Data: 8 Data bits No Parity 1 Stop bit Antenna: 900 MHZ Omni & Yagi (location dependent) PMPP RS-232 BPS: 19200 Data: 8 data bits No Parity Stop bit Average RWIS Data Sessions: 55 seconds Average RWIS + Video (24KB JPEG Image File) Data Session: 4 minutes 12 seconds 2004 NATMEC
Remote Dialup Wireless Serial Link to RWIS With Secure Console Server Server Modem Secure Console Server
WAN RWIS Server
RPU Modem
Master
Spread Spectrum
Slave
Spread Spectrum
RPU
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Remote Dialup to Wireless Serial Link to RWIS With Secure Console Server Protocol Stack Server
Network Secure Console Server Service Modem Phone Connection Relay Modem Relay Radio Repeater Radio
RPU Radio Communication Session Timings
ESS/SNMP/UDP/IP/SLIP/RS-232 Windows 2000 Professional, Service Pack 2.0 Remote Access Service (RAS) Lantronix Secure Console Server Driver 10/100Base-T 10/100 Ethernet Switch Lantronix SCS 100 3Com Courier 56K V.Everything External Modem Internal PBX Phone System 3Com Courier 56K V.Everything External Modem FreewaveTM Model FGR-115RC Mode: Point to Point Master BPS: 19200 Data: 8 Data bits No Parity 1 Stop bit Antenna: 900 MHZ Omni FreewaveTM Model FGR-115RC Mode: Point to Point Repeater Antenna: 900 MHZ Omni FreewaveTM Model FGR-115RC Mode: Point to Point Slave BPS: 19200 Data: 8 Data bits No Parity 1 Stop bit Antenna: 900 MHZ Omni Average RWIS Data Sessions: 28 seconds Average RWIS + Video (24KB JPEG Image File) Data Session: 2 minutes 20 seconds 2004 NATMEC
Remote Wireless Ethernet Link to RWIS With Secure Console Server
Router
Master
Spread Spectrum
WAN RWIS Server
Slave
Spread Spectrum
DOT Mntsn
RPU
Spread Spectrum
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Remote Wireless Ethernet Link to RWIS Protocol Stack Server Network Network Wireless Ethernet Bridge Master Wireless Ethernet Bridge Repeater Wireless Ethernet Bridge Slave Communication Session Timings
ESS/SNMP/UDP/IP/ETHERNET Windows 2000 Professional, Service Pack 2.0 10/100Base-T 10/100 Ethernet Switch Router FreewaveTM Model FGR-115RE Ethernet Mode: Point to Multipoint (sets internet access to MS) FreewaveTM Model FGR-115RE Ethernet Mode: Point to Multipoint Repeater FreewaveTM Model FGR-115RE Ethernet Mode: Point to Multipoint Slave Average RWIS Data Sessions: 4 seconds Average RWIS + Video (24KB JPEG Image File) Data Session: 43 seconds
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Contact Info Jack Stickel RWIS Project Manger
[email protected] (907) 465-6998 http://www.dot.state.ak.us/iways/roadweather/index.html AURORA RWIS Pooled Fund http://www.aurora-program.org
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