Wireless Ethernet Technologies

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Wireless Ethernet Technologies
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Wireless Ethernet Technology
Industry technologies market trends Choosing
the right radio technology for the job Why there
is no one size fits all in wireless
world Determining the correct frequency for the
job Slow speeds vs. fast speeds Interference
and Security Ease of installation
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Backhaul, Multiple Access, Cellular and Mesh

• Wi-Fi Multiple Access solutions are optimized to
  support several simultaneous device as mobile
  locations. Great for surfing. Bad for video.
  Typically 2.4GHz.
• Backhaul solutions are optimized for fixed point
  to point connections. Longest range and highest
  success rates. Typically 900Mhz or 5.8GHz.
• Fixed Multiple Access solutions are optimized to
  support several simultaneous device as fixed
  locations. Great for surveillance applications.
  Typically 5.8GHz.
• Cellular systems are versatile but require
  monthly fees. They are relatively inexpensive to
  buy and install. Specialized radios with high
  quality antennae at elevated locations have best
  success. Populated venues often have throughput
  issues. Various licensed frequencies used.
• Mesh systems require high radio node density.
  They are relatively expensive to buy and install.
  Smaller node counts have better success and
  higher throughputs. Typically 5.8GHz.

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How far will the link go?
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Mesh and Spoke
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What are the ACTUAL data requirements?

• LAN extension at 100Mbps?
• H.264/MPEG4/JPEG MegaPixel Video at
  2Mbps/camera?
• Internet/NVR viewing at uplink speeds?
• Access Control or PTZ data at 9600bps?
• Are there network bottlenecks or limits in the
  system? DSL/Cable/T1/Cellular/Satellite/WLAN

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Speed vs Range vs Channel Width
Long Range Modest Speed More Channels
(intelligence) Interference Agile
Slow
1.5Mhz
5Mhz
10Mhz
Short Range High Speed Few Channels
(stagnant) Interference prone
Fast
20Mhz
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How does the data rate change with distance?

• AW900 systems at a 30 mile link are only affected
  by the added 3 speed of travel delay.
• AW58100 systems at a 30 mile link will have a 75
  data reduction due to slower coding gain required
  to achieve distance.

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How is security handled?

• AES keyed encryption FIPS 197/140-2
• Encryption at the application layer HTTPS is
  becoming a preferred technique for sensitive
  communications.

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Robust against interference?

• How does the system handle interference?
• In band and out of band?
• How easy is the system to intentionally jam?
• Is the system able to autonomously coexist or be
  remotely managed?
• Is a truck roll required to perform a site survey
  or change channel ?

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How to provide lightning protection?

• AvaLANs antennae are DC grounded. However, the
  use of inline lightning suppressor is always a
  good idea.
• Mount the antenna at least 3ft from the top of a
  grounded pole

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Thank you!
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