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Caught in the mesh

By William Jackson, GCN Staff

Mesh WiFi has quickly become the darling of large-scale wireless projects. But is it the best solution?

As more municipalities and government campuses look to build out large-scale wireless networks, so-called mesh technologies built around current 802.11 WiFi standards have become the dominant choice. But with many of these networks still in the building phases—and many more still to be planned—it’s not too late to look at current wireless systems and determine whether one size fits all.

Although the 802.11 family of standards is still evolving, the hardware is fairly mature.

“It is an exciting, affordable and robust technology at this point,” said Paul Butcher, marketing manager for state and local governments at chip-maker Intel Corp.

Intel’s WiFi chips are in more and more mobile devices, and interoperable standards mean government agencies can choose from several mesh WiFi proposals when shopping for the best, most affordable deployments. But there are choices other than traditional mesh WiFi to consider.

“People think it’s the safe choice, but it’s not necessarily the smart choice,” said Carl J. Weisman, vice president of engineering for 5G Wireless Solutions Inc. of Marina del Rey, Calif.

Not even the folks at Tropos Networks Inc. of Sunnyvale, Calif., which sells mesh WiFi, claim the technology is the be-all and end-all of wireless networking.

“I don’t want to say the technology is perfect,” said vice president of marketing Ellen Kirk. “This is radio, people, and radio has a mind of its own. You put up an RF network and you’re going to be tuning it forever.”

Large-scale WiFi networks draw concerns over range, bandwidth, scalability, mobility and complexity, and there is not yet enough real-world experience to adequately address those concerns. The alternatives emerging to challenge or complement mesh WiFi include WiMax, cellular architectures and multiradio access points. Each has its own strengths and weaknesses.

The growth of mesh WiFi

WiFi is a broad term, covering the spectrum of 802.11 standards from the Institute of Electrical and Electronics Engineers. It was designed primarily for short-range, indoor wireless connections between nonmobile clients and a wired LAN. As bandwidth and range have improved, its scope has expanded to include public hotspots for Internet access, as well as campus and municipal deployments.



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