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NDAQ Planning

NDAQ Planning. Communication Subsystems / Contents: Key Issues / Questions Communication Options GOES 300/1200bps Iridium Satellite Modem Spread-Spectrum L.O.S. Radio Modems Wireless Ethernet Short-Range Mote / Sensor Interfacing Recommendations. Key Issues / Questions.

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NDAQ Planning

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  1. NDAQ Planning Communication Subsystems / Contents: • Key Issues / Questions • Communication Options • GOES 300/1200bps • Iridium Satellite Modem • Spread-Spectrum L.O.S. Radio Modems • Wireless Ethernet • Short-Range Mote / Sensor Interfacing • Recommendations

  2. Key Issues / Questions • What is needed for upcoming / likely Projects? • Is 2-Way Communications Manditory: • Is ‘messaging’ latency acceptable or is console function required? • Should all stations use the same method for a given project? • Would ‘station-gateways’ be a better model? • ‘near-vicinity’ L.O.S. to ‘GOES/Iridium/Wireless-ethernet gateway station?’ • What are the spatial coverage requirements? • Is remote telemetry to Boulder for international projects fundamental? • Is a highly distributed network (non-LOS) a design criteria? • Is the Peer-Peer model a High-Priority? • For what applications?....ASA • Should non-NDAQ ‘repeater’ sites be provided? • What is the maximum message size / rate needed? • Traditional PAM summary messages or significantly greater? • Is GPS manditory for Time-Keeping?....probably. • Is ‘Black-Box-It!’ realistic or desirable? • NDAQ Planning

  3. Communication Options: • GOES Satellite @1200bps • large coverage / Free use / one-way communication • We have it, why not use it?... • Iridium Satellite • Global coverage / user costs / 2-way • Is there a reason to even do anything else?... • Spread-Spectrum L.O.S. Radio Modems • Limited coverage (up to 20 miles line-of-sight) / Free / 2-way / high-speed, unlimited access (maybe) • Is the software/overhead needed for peer-peer manageable, desirable, and/or too much trouble? • Cell Phone Access • limited coverage / user cost • Why would we do this ‘up-front’ if at all? • Wireless Ethernet • limited range / high-speed, unlimited access / 2-way / service provider • Would hardware meet range requirements; without specialized installation / antennas? • Other: … satellite internet (motosat on a PAM!); … Return to Top/Outline Slide

  4. GOES 300/1200bps • Internet data download / Proven System • NCAR has not tested 300/1200 • Questions remain about data recovery percentages • Advantages Disadvantages • Western Hemisphere - 1-way communications • Free Use - Reliability? • Existing Equipment (3) - Antenna/pointing issues • Power: 12VDC; 40W/.2W - Power: High xmit current • - • -

  5. Iridium Satellite Modem • Options: Available any phone per provider plan, costs vary • Short Messaging Service • 160 char message limit / email delivery: multiple addresses / 5-20 latency / Delayed 2-way messaging / Remote must check for incoming • Cost Effective ($.40 / message outgoing; $0 incoming) • $50 Activation, $30/month, $0.40 per message outgoing, $0 incoming • Short Burst Data – requires some firmware upgrade • 1960 char message limit / email delivery: single address / 5-20sec latency / Delayed 2-way messaging / Remote must check for incoming (send/receive buffer in radio) • $50 Activation, $15/month, $1.50 per kB (infosat); 1-year contract may be reqd • $xx Activation, $25/month, $1.30 per kB (skyhelp); 1-year contract reqd • Dial-up / Direct Internet • Console Operations / Link-up overhead of several seconds / continuous connection via spoofing / data compression for text file transfers can boost apparent speed • Unlikely to use for regular data transfers • $50 Activation, $30/month, $1.19 - $1.39/minute • Advantages Disadvantages • Global Coverage - Use Fees / Contract Maintenance • Faster rate than GOES (2400) - Gateway / router issues? • Power: 4.0-4.8VDC(?)10W/5W/.2W - Reliability? • Small Antenna (No Pointing!) • 2-way communications • Drift-Sonde / Other EOL uses Return to Top/Outline Slide

  6. Iridium Vendors/ Links • InfoSat Communications: Equipment and Provider, Available mid-Dec • Also Provide Internet Broadband services (vis-à-vis Motosat) • 24-hour Customer Service • Motorola 9505A hand-set and Data Kit $1500 + $180 • Motorola 9522L Data Modem w/ant.,10m cable $1500 • SkyHelp.Net - Iridium Service Provider: Short Burst Data Pricing • NAL Research Corporation : Equipment Only, Available Feb-05 • Iridium Modem: A3LA-I $1050 • Modem/Handset: A3LA-IP $1350 • Modem/GPS: A3LA-IG $1350 • Will Iridium costs, cost us some projects? • PAM-like use: Packets 40-120 bytes every 5-min = 288/day • Who pays for devel./testing when not in field? Return to Top/Outline Slide

  7. Iridium Fees • Hypothetical Iridium costs • SMS: <= 160 byte message = .4/message = $115.2/day (288*.40) * 30 + $30/mon ~= $3,500/mon/station • SBD: 120 byte message = .16/message = $46.1/day (288*.16) * 30 + $25 = $1,408/mon/station 35 byte message 1/5-min = .05/message = $14.4/day (288*.05) * 30 + $25 = $ 457/mon/station • DialUp: adds additional expense for ‘console’ • Do we need to modify how we package data? • Call the station via dial-up and then transfer? • Limited number of ‘gateway’ stations for LOS clients? • Is ‘global-remote’ coverage really needed? • SHEBA(?) / AOE(?) / GAME / CME / HVAMS / IHOP / CASES

  8. Spread-Spectrum L.O.S. Radio Modems • Extensive search performed Spring-03 for "ISA“: 3 Companies stood out • Note About Range Considerations • Dependent upon tower height: For 60-miles you need a 20-30m tower; for 20-miles (more likely) you need ~30-40ft tower • Dependent upon throughput: higher = shorter; etc. • Questions for All Peer-Peer: Can we reconfigure on the fly? • Advantages Disadvantages • 2-way communications - Reliability / not fully tested? • May require ‘intelligent’ - May require ‘intelligent’ routing software routing software • High-Speed (115kbps) - Antenna / pointing issues? • Free Use - ‘Pre-Setup’ may be required; or • Existing Equipment (4) unique ‘AT-command’ settings • Power: 12VDC; 1.1W/.4W - Need to confirm ‘source-dest’ • Power: 5VDC; code in new firmware • 20-mile range

  9. Spread-Spectrum L.O.S. Radio Vendors • MaxStream's New 1W 900Mhz(Brandy) • 9600-115kbps / 7-20 miles / True Peer-Peer / Multipoint / 5VDC @ 140-780mA xmit / 80mA rcv / 10mA sleep (4W-max, .4W, .05W) • Need to test ‘source – destination’ firmware now available. • RS232 / Ethernet / USB Interfacing Options • Sensitivity -110dbm (9600) / -100dbm (115kbps) • OEM Unit (+5V reg.) $180 • Packaged Modem (9-16vdc, rs232) $300 • Devel Kit (2 radios, cables, etc) $500 • MicroHard Products (Jeff/Nicole) • 19.2-230kbps / Peer-Peer via 1-master-hub which can be repeater/slave / 9-30VDC / 12VDC@600mA xmit / 95mA rcv / 20mA idle / 1mA sleep (7.2W, 1.15W, .24W, .01W) • With Hub at Base Station, can ‘Internet Access’ remotes via tcp/ip / requires some setup • Sensitivity -112dbm (230kbps) / -116dbm (19.2kbps) • RS232 / Ethernet Interfacing Options • 270kbps 900Mhz Wireless Ethernet Bridge SpectraNT-920 $1395 • 900Mhz Wireless Modem MHX-920 $695 • 4-5.5VDC or 7-30VDC option, lower power @4 • Freewave Technologies • 9600-115kbps / weatherized, wide input enclosures available / pc104 form available • No true Peer-Peer / 6-30VDC • More expensive (haven’t checked)

  10. Wireless Ethernet • More Extensive Search Required…. • PC card adaptors readily available • Rico 802.11b: YDI Communications Client Adaptor • +12vdc operations (10+Watts); claims up to 15-miles?...Need to confirm at RICO • Client Spec-Sheet • T-POP Outdoor Access Point Spec-Sheet • DPAtech Serial bridge to 802.11b: www.dpatech.com embedded modules • See MicroHard Products above for lower-rate, longer-range • What Range is needed, and for what functionality / price? • Advantages Disadvantages • 2-way communications - Requires ‘Provider’ access • Very-High-Speed (4Mbps) or ‘Local-Area-Net’ only • Transparent networking - Either short range … • or Power/Antenna issues • - -

  11. Short-Range Mote / Sensor Interfacing • Somewhat out of the scope of existing ‘presentation’ : More Extensive Search Required…. • Build or Buy? • Frequency / Range / Network-Routing vs Pt-Pt • Mica’s: • 433Mhz • 900Mhz • Zigbee • Blue-Tooth options abound • Peer-peer? • Is the range adequate? • Example: Smart Modular Technologies: 200kbps / <=30m / DB-9 interface / xxVDC @ 150mA (1mA sleep) • Cypress Wireless USB Up to 50m, 68kbps

  12. Recommendations Sans Discussion… • #1 Evaluate / Test Iridium 9522L Phone Modems • It’s Global! And Charlie’s going to do it anyway! 1-3, Skyhelp.net provider using SBD. • Find money to pay for service contract for testing. • #2 (MicroHard/Maxstream) L.O.S. Networked to ‘hub station gateway’ • Does the term “ASA” sound familiar? • #3 802.11b YDI access point • 3-each replace aging Breezecoms for ‘ASTER’ deployments • #4 GOES High-Rate Testing and Implementation • Why not, 3 are ready to roll! • #5 Research and select short-range sensor modules: spring-05 • Test for potential interference and performance! • #6 Future: Cell Phone only as needed per dictates of project • Yuk, urban deployments! • Fill-In the blank __________________

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