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Several cities, including Philadelphia and San Francisco, are
considering installing city-wide wireless internet connections of a new
generation. These so-called wireless mesh networks will enable users to
route their connections through other users' computers, in order to find
available channels more efficiently and reduce down time.
Computer user, Kevin Maddrey says, "Sometimes the Internet connection is spotty, and I'll automatically lose connection for no reason."
Maddrey knows exactly what happens when too many uses try to log on. But now computer engineers have found a better way to wirelessly connect to cyber space. It's called mesh technology; a system where the more users there are the better it works.
"It's the exact opposite of a traditional 3G technology," says Mitchell Gonzalez, President & CEO of Cheetah Wireless Technologies in Las Vegas.
Gonzalez says mesh wireless technology is faster, cuts down on congestion and interference, has better coverage, and has one more special perk. "What the mesh technology does is increase our ability to provide service more efficiently for a lower cost," Gonzalez says.
Here's how it works: Once you subscribe to the network, wireless PCs in the network "talk" with each other. They connect through wireless routers installed throughout a business, home or car -- an ideal network for Maddrey and the millions of other people who log on to the Internet every day. And overcrowding is never a problem. If too many people are using part of the mesh network, users move through each other to reach an unused signal.
The mesh network is also ideal if local communication resources are destroyed during a disaster because the network seamlessly picks up where one left off. The first mesh networks are being tested in Philadelphia, New York and Las Vegas.
HOW IT WORKS: Wireless, or "WiFi,"
technology and the Wireless Internet are a direct result of the
staggering growth in cell phone use over the last decade. It is a system
of connecting personal computers and other electronic devices in close
physical proximity through high-frequency radio waves instead of wires
or cables. The Wireless network is basically a series of linked
transmitters and receivers. There are two main components in a
traditional hub-and-spoke wireless network: wireless access points and
wireless clients. Access points are base stations that are connected to
the network at regular intervals to provide maximum coverage in a given
region. Wireless clients are the network interfaces housed in computer
devices that communicate with the access point.
Many factors can affect the speed of a wireless connection: how far you are from the access point, for example, or interference from other devices, such as cordless telephones. In general, the closer you are to an access point, the faster your connection will be; speeds fall back automatically as you move away to compensate for the distance. Also, since wireless users must share bandwidth, the more clients are connected to a specific access point, the slower the speed will be for each client.
MESH ADVANTAGES: Mesh network models are more decentralized than the hub-and-spoke approach currently used. Mesh networks promise several key advantages over traditional wireless technologies like cell phones or Wi-Fi. These include higher speeds, less radio interference, less network congestion, better geographic coverage, and tighter security. It's also cheaper to build a mesh network, since it can be set up using poles already in place for streetlights, traffic signals and road signs. Routers are simply bolted to the posts and plugged into the photocell power adapter already atop most streetlights. The routers are then automatically assimilated into the mesh network. If a cellphone tower stops working because of a power failure or terrorist attack, users will be cut off entirely from access in that cell. With a mesh network, any piece of mesh hardware -- a wireless router, for instance, or a laptop's interface card -- is fully assimilated into the network and can act as a relay. If one relay goes down, there are lots of alternate routes available.
The Institute of Electrical and Electronics Engineers, Inc. (IEEE), contributed to the information contained in the TV portion of this report.
source: Sciencedaily
Many factors can affect the speed of a wireless connection: how far you are from the access point, for example, or interference from other devices, such as cordless telephones. In general, the closer you are to an access point, the faster your connection will be; speeds fall back automatically as you move away to compensate for the distance. Also, since wireless users must share bandwidth, the more clients are connected to a specific access point, the slower the speed will be for each client.
MESH ADVANTAGES: Mesh network models are more decentralized than the hub-and-spoke approach currently used. Mesh networks promise several key advantages over traditional wireless technologies like cell phones or Wi-Fi. These include higher speeds, less radio interference, less network congestion, better geographic coverage, and tighter security. It's also cheaper to build a mesh network, since it can be set up using poles already in place for streetlights, traffic signals and road signs. Routers are simply bolted to the posts and plugged into the photocell power adapter already atop most streetlights. The routers are then automatically assimilated into the mesh network. If a cellphone tower stops working because of a power failure or terrorist attack, users will be cut off entirely from access in that cell. With a mesh network, any piece of mesh hardware -- a wireless router, for instance, or a laptop's interface card -- is fully assimilated into the network and can act as a relay. If one relay goes down, there are lots of alternate routes available.
The Institute of Electrical and Electronics Engineers, Inc. (IEEE), contributed to the information contained in the TV portion of this report.
source: Sciencedaily
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