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Installing AvaLAN Wireless Ethernet Systems

Installing AvaLAN Wireless Ethernet Systems. Presented by Michael Derby AvaLAN Wireless Systems. AvaLAN Wireless Ethernet Radio Systems. The most common questions… Do I need backhaul or a multiple access solution? How far will the link go? How does the data rate change with distance?

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Installing AvaLAN Wireless Ethernet Systems

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  1. Installing AvaLAN Wireless Ethernet Systems Presented by Michael Derby AvaLAN Wireless Systems

  2. AvaLAN Wireless Ethernet Radio Systems The most common questions… Do I need backhaul or a multiple access solution? How far will the link go? How does the data rate change with distance? How is security handled? How does the system handle interference? How to setup and debug an installation? Which antenna to use? How to mount the system on a pole? Can the system provide multiple access? How to install multiple systems in close proximity?

  3. What is the difference between backhaul and multiple access? Backhaul solutions are optimized for fixed point to point connections. Multiple Access solutions are optimized to support many simultaneous mobile users at short range. Typically - Multiple Access systems are a poor choice for backhaul.

  4. “Backhaul” systems with directional antennae Location #2 17 miles 30 miles Location #1 14 miles Location #3 Main Location Point to Point radios – each subscriber gets a dedicated 1.54Mbps radio link (4.6Mbps total)

  5. “Backhaul” systems with directional antennae Location #2 7 miles 5 miles Location #1 4 miles Location #3 Omni Antenna Multipoint radios – xTR 1.54Mbps is shared between subscriber radios Main Location

  6. “Mobile” systems with Omni antennae Location #2 0.25 miles 0.25 miles Location #1 0.25 miles Location #3 Omni Antenna Multipoint radios – xTR 1.54Mbps is shared between subscriber radios Main Location

  7. “Directional antennae” “Sector antennae” Location #4 Location #2 12 miles 7 miles 10 miles Location #3 8 miles Location #1 Main Location Multipoint radios – xTR 1.54Mbps is shared between subscriber radios

  8. How far will the link go?

  9. Clear Line-of-sight (LOS) 5.8GHz Drive a bus through the path… 40 Miles is possible

  10. How far will it go? • Radio Link Budget – Free Space Loss = System operating margin • System operating margin >18dB is safe • Free space loss = 20log(Freq in MHz) + 20log(distance in miles) +36.6 • At 900MHz: At 5800MHz: • 0.1 mile has 76dB of loss 92dB of loss • 1 mile has 96dB of loss 112dB of loss • 10 miles has 116dB of loss 132dB of loss • 50 miles has 130dB of loss 146dB of loss

  11. Link Budgets At 900Mhz with 15dBi with 11dBi with 2.5dBi + transmitter power 21dB 21dB 21dB + transmitter antenna gain 15dB 11dBi 2.5dBi – transmitter cable losses 0dB 0dB 0dB + receiver sensitivity 97dB 97dB 97dB + receiver antenna gain 15dB 11dBi 2.5dBi – receiver cable losses 0dB 0dB 0dB ____________________ _____ _____ _____ Link Budget = 148dB 140dB 123dB At 5800Mhz with 29dBi with 23dBi with 5dBi + transmitter power 21dB 21dB 21dB + transmitter antenna gain 29dB 23dBi 5dBi – transmitter cable losses 1dB 1dB 0dB + receiver sensitivity 97dB 97dB 97dB + receiver antenna gain 29dB 23dBi 5dBi – receiver cable losses 1dB 1dB 0dB ____________________ _____ _____ _____ Link Budget = 174dB 162dB 128dB

  12. Examples: • Will a 5.8Ghz AvaLAN link work at 40 miles using 23dBi panels on both ends? • Yes: Link budget (162dB) – Free space loss (144dB) = System operating margin (18dB) • Will a 900Mhz AvaLAN link work at 50 miles using a 15dBi yagis on both ends? • Yes: Link budget (148dB) – Free space loss (130dB) = System operating margin (18dB) • Will a 5.8Ghz AvaLAN link work at 5 miles using a 5dBi omni and a 23dBi? • Yes: Link budget (145dB) – Free space loss (126dB) = System operating margin (19dB) • Will a 5.8Ghz AvaLAN link work at 3/4 mile using 5dBi omnis on both ends? • Yes: Link budget (128dB) – Free space loss (109dB) = System operating margin (18dB)

  13. Diffractive Non-line-of-sight Angle of Attack 900Mhz 2.4GHz 5.8GHz 500 ft 10 Degrees 10 Degrees 20ft 20ft 2 Miles Angle of attack Distance 1° 10 Miles 5° 5 Miles 10° 2 Miles 15° 1 Mile

  14. Up to 1500ft Penetrating Non Line of Sight

  15. Path loss calculations - Indoor

  16. Path loss calculations - Indoor See our online path loss white paper at: www.avalanwireless.com/support

  17. How does the data rate change with distance? The data rate should only be affected by the added speed of travel delay. A 50 mile link will have a 3% data reduction due to speed of travel impact on packet timing.

  18. How is security handled? AvaLAN uses AES128 conformant to FIPS 197 and with NIST certificate. Encryption at the application layer is becoming a preferred technique for securing sensitive communications. (VLAN/VPN/SSL/TSL)

  19. Robust against interference? How does the system handle interference? In band – packet bursting and agility out of band – SAW bandpass filter How easy is the system to intentionally jam? Not possible with consumer products. The AvaLAN system able to autonomously coexist with many other devices in the 902-928MHz band. However, all radios can be jammed...

  20. AvaLAN Products NEW : Web browser interface Best: 900Mhz and 5.8Ghz Simple setup Multi-Point Outdoor Version AES128 Encryption xTR & iTR Sold Individually Spectrum Analyzer Data or Video Aluminum NEMA 4x Enclosure Outdoor and Indoor Versions Remote Diagnostics, Configuration and upgradeable

  21. Multi-Point Network Topologies

  22. How to setup a system? Point to Point systems are shipped ready to run. Multi-Point systems require 2 steps to create the network. Step 1 – choose the unit to be the access point and set DIP 1 ON Step 2 – attach each subscriber to the access point via Ethernet port to share keys Auto frequency selection… No crossover cables needed… Check the link quality… Check the ETH link LED… Ping something on the other side…

  23. How to setup multiple systems in close proximity? Use high gain antennae to isolate and direct energy… For Pt to Pt, Keep the units paired together… Setup one link at a time with the others off… Adjust antennae to create sufficient isolation between links use angular, polarization, spectral and spatial separation…

  24. Isolation techniques Horizontal Polarization Delta Angular Vertical Polarization

  25. Power supply options? AvaLAN offers two power supply accessories. Indoor AW12V - cigarette lighter powered automotive applications. Outdoor AW24V - 24VAC power common in security markets The indoor radios are compatible with 48VDC to 5VDC Linksys POE splitter (model WAPPOE $35) The indoor radios can be powered from 5VDC to 7VDC The outdoor radios can be POE powered from 6VDC to 48VDC. For solar applications it is possible to power with as little as 3.2VDC at 350mA = 1 Watt of power draw.

  26. How to provide lightning protection? AvaLAN’s antennae are DC grounded. However, the use of inline lightning suppressor is always a good idea.

  27. Thank you! www.AvaLANwireless.com Sales - sales@AvaLANwireless.com (866)533-6216 Support - support@AvaLANwireless.com (650)384-0000 Michael Derby - mderby@AvaLANwireless.com

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