wireless mesh network

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wireless mesh network

(1) A network that relies on all nodes to propagate signals. Although the wireless signal may start at some base station (access point) attached to a wired network, a wireless mesh network extends the transmission distance by relaying the signal from one computer to another. Used on the battlefield to provide path diversity, it is also used for sensor networks and personal computers. See mobile ad hoc network, 802.11 and wireless LAN.


A Wireless Mesh for Users
When laptops are set up in a wireless mesh, they act as routers for each other.







(2) A network that provides Wi-Fi connectivity within an urban or suburban environment. It comprises "mesh routers," which are a combination base station (access point) and router in one device. Also called "mesh nodes," they are typically installed on street light poles, from which they obtain their power.

Access Point and Backhaul Router
Like any Wi-Fi access point, the access point in the mesh router communicates with the mobile users in the area. The backhaul side of the device relays the traffic from router to router wirelessly until it reaches a gateway that connects to the Internet or other private network mostly via a wired connection, but that could also be wireless.

Routing Algorithms
A major benefit of wireless mesh networks is path diversity, which provides many routes to the Internet in case one of the routers fails or its transmission path is temporarily blocked. The choice in routing algorithm is critical, and numerous mesh algorithms have been used over the years.

Number of Radios
Mesh routers can employ one, two or three radios. A single-radio router shares bandwidth between users and the backhaul. If two radios are used, one is dedicated to the frontside clients and the other to the backhaul. In three-radio routers, two radios are used for the backhaul and can transmit and receive simultaneously over different Wi-Fi channels. See 802.11.


A Wireless Mesh Network Topology
This simulated example from Tropos Networks is overlaid onto an aerial map to show how mesh routers are used in a metropolitan environment. (Image courtesy of Tropos Networks, Inc., www.tropos.com)







On the Pole
Depending on foliage and topography, up to 20 mesh routers are mounted on light poles per square mile. In this example, the man is making a Wi-Fi voice call between his VoWi-Fi phone and a Wireless Multi-Service Switch Router. (Image courtesy of Ericsson, www.ericsson.com)



On the Pole
Depending on foliage and topography, up to 20 mesh routers are mounted on light poles per square mile. In this example, the man is making a Wi-Fi voice call between his VoWi-Fi phone and a Wireless Multi-Service Switch Router. (Image courtesy of Ericsson, www.ericsson.com)



On the Pole
Depending on foliage and topography, up to 20 mesh routers are mounted on light poles per square mile. In this example, the man is making a Wi-Fi voice call between his VoWi-Fi phone and a Wireless Multi-Service Switch Router. (Image courtesy of Ericsson, www.ericsson.com)



On the Pole
Depending on foliage and topography, up to 20 mesh routers are mounted on light poles per square mile. In this example, the man is making a Wi-Fi voice call between his VoWi-Fi phone and a Wireless Multi-Service Switch Router. (Image courtesy of Ericsson, www.ericsson.com)
References in periodicals archive ?
bring together 15 chapters in this guide to security issues in wireless mesh networks, by computer science and electrical engineering researchers from around the world.
Strix and its Channel/One partners have deployed the largest and most diverse operational wireless mesh networks in the U.
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Written by authors with vast experience in academia and industry, Wireless Mesh Networks provides its readers with a thorough overview and in-depth understanding of the state-of-the-art in wireless mesh networking.
a leading developer of wireless mesh networks launched a new program to educate and certify its value added resellers on the latest advancements in mesh networking.
Focusing on the commercial potential of the wireless mesh network, defined as "a series of peer-to-peer transmissions where each mode functions as a router and repeater," this work explains the basic conceptual underpinning of the technology and its advantages over existing technologies and applications.
Hutton chose Strix Systems as a result of the company's proven track record for delivering the industry's de-facto standard robust high performance multi-radio products for wireless mesh networks.
Under this agreement, ADI will provide distribution and a full range of support services for Firetide indoor and outdoor wireless mesh networks.
Tropos[R] Networks, the market leader in wireless IP broadband mesh networks, today announced that the company has been awarded six new patents so far this year for technology innovations created to meet the environmentally tough challenges of outdoor wireless mesh networks.
Wireless mesh networks are increasingly being called upon by the United States' defense and intelligence communities to provide greater situational visibility resulting in more information available about the physical environment.
HOUSTON -- BelAir Networks, the leading provider of mobile broadband mesh networks, today announced that Citymesh nv, an innovative wireless solutions provider headquartered in Belgium, has standardized on BelAir Networks award-winning wireless mesh network solutions for industry-leading broadband wireless mesh networks.
Mesh City is one the first companies in the United States to be authorized to use the EWM[TM] patents for citywide municipal wireless mesh networks.

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