Wireless Ethernet Technologies

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

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.

How far will the link go?

Mesh and Spoke

What are the ACTUAL data requirements? LAN extension at 100Mbps? H.264/MPEG4/JPEG MegaPixel Video at 2+Mbps/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

Speed vs Range vs Channel Width Long Range Modest Speed More Channels (intelligence) Interference Agile Short Range High Speed Few Channels (stagnant) Interference prone 5Mhz 10Mhz 20Mhz 1.5Mhz Fast Slow

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.

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.

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 ?

How to provide lightning protection? AvaLAN’s 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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