City's mesh network nets criminals

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City's mesh network nets criminals
By Jim Rendon, News Writer
05 Nov 2004 | SearchNetworking.com
<http://searchnetworking.techtarget.com/originalContent/0,289142,sid7_gci1023354,00.html>

ATLANTA -- Last year New Orleans ranked as having the highest per capita
murder rate in the U.S., with 275 homicides. But Thursday at the
Networking Decisions 2004 conference, one of the city's technologists
said it's working to keep citizens safe with the help of wireless
networking technology.

In January, New Orleans launched a pilot project setting up an 802.11b
wireless mesh network and mounting connected IP-based surveillance
cameras in high crime neighborhoods. The city uses images from the
cameras to help convict offenders caught in the act.

In the space of six months, the neighborhood's murder rate was down 57%
and auto thefts were down 30%, according to Chris Drake, project
director of the mayor's office of technology in New Orleans.

"The cameras have helped because it is often hard to get witnesses to
testify," Drake said. "This is a witness that can't be intimidated."

New Orleans is one of several dozen municipalities across the U.S. that
has implemented wireless broadband networks. Drake said the city is
using an 802.11b wireless mesh network from Tropos Networks Inc. of
Sunnyvale, Calif., to deploy Wi-Fi across high crime neighborhoods.

By using a mesh architecture
<http://searchnetworking.techtarget.com/originalContent/0,289142,sid7_gc
i947480,00.html>  that passes data along from access point to access
point, Drake said, New Orleans has been able to control deployment costs
and maintain greater flexibility in choosing access points locations.

Since mesh networks move data from one access point to the next, fewer
hard-wired connections are required. Such a design reduces costs, Drake
said, because access points require fewer cables.

But because moving data from access point to access point utilizes a
good deal of bandwidth on the wireless network, the city found that it
needed to hard-wire a connection after every two access points.
Otherwise, Drake said, the available bandwidth would sink below 1 Mbps.

The police department is also using the Wi-Fi connection to transmit
police reports and ticket information so that when a traffic ticket is
issued, the data is sent directly into the city's computer system,
bypassing a manual process that is prone to errors.

<snip>


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