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 ?
Since Mesh Tek designs, integrates, and deploys wireless mesh networks, it helps us to build partnerships with key manufactures such as Strix Systems," said Drew Lentz, network architect at Mesh Tek.
Describes system architectures and applications of wireless mesh networks (WMNs), and discusses the critical factors influencing protocol design
Advanced students on networking, computer science, and electrical engineering courses will find Wireless Mesh Networks an essential read.
With Firetide's wireless mesh networks, it is not only much easier for our customers to install a surveillance system, but they can also remotely monitor and record video from any location over the Internet.
Dust Networks' subcontract involves the provision of low-power wireless mesh networks that will provide intelligence to support urban area operations.
Innovations in low-power wireless mesh networks led by companies like Dust Networks are clearly driving the development of more effective threat monitoring systems that can help defense personnel work more effectively.
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.
The EWM[TM] patents form the fundamental framework needed today to implement wireless mesh networks.
Licensees include those using, selling and manufacturing wireless mesh networks.
KANATA, Ontario -- BelAir Networks, the leading provider of mobile broadband mesh network solutions, today announced that the company has received the Frost & Sullivan Award for Technology Innovation Award for its ground-breaking, carrier-grade switched mesh network technology used in Wireless Mesh Networks (WMN) worldwide.

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