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 ?
By contrast, wireless mesh networks are designed to avoid these problems.
In addition to Hutton's nationwide distribution, the company offers value added services including site survey, design, project engineering and site kitting for wireless mesh networks in addition to traditional wireless applications.
The minimization of channel filters within access nodes (US Patent Number 7,362,737) is a hardware design patent that maximizes the throughput of a wireless mesh network by minimizing interference and minimizing hardware costs through the intelligent use of wireless filters.
Citymesh nv is a telecommunications firm specializing in designing and deploying large-scale wireless mesh networks.
A key component of the public safety video surveillance network is Strix Access/One wireless mesh network system which delivers the industry's highest-power for multiple radio frequencies (multiband) including 4.
The EWS 150 is powered by Strix's Dynamic Mesh Architecture[TM] (DMA[TM]), which provides the highest power and longest reach of any indoor wireless mesh network CPE.
Wireless mesh network management requires such a correlated system perspective because these networks are highly dynamic and interdependent.
The RedCONNEX AN-80i supports a range of broadband wireless applications including backhaul for municipal wireless mesh networks, connectivity for video surveillance systems, transportation systems such as railways, oil and gas operations and providing backhaul for WiMAX networks including Redline's RedMAX(TM) family of WiMAX Forum Certified(TM) systems, among others.
DHEC is certainly a well-respected name in the automotive industry, and this deployment emphasizes how a wireless mesh network can be a critical component of complex supply, manufacturing, and operations processes.
Tropos[R] Networks, the market leader for metro-scale wireless mesh network systems, today announced its new Spectrum and Application Based Routing Engine (SABRE), the first mesh software that enables intelligent integration of parallel network operation across multiple frequency bands and radio types.
Tropos Networks, the market leader for metro-scale wireless mesh network systems, and Solana Technologies Inc, a leading wireless network integrator, today announced that the city of Las Vegas, New Mexico, is currently deploying the Tropos MetroMesh Wi-Fi system to provide mobile wireless connectivity for the Las Vegas Police Department.

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