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 ?
The currently released LAC supports X2 gateway, real-time SON server, edge/cell site aggregation router, mesh router, small cell gateway/HeNBGW, security GW, MOCN, and Wi-Fi handoff controller.
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The new round of funding, tot alling pounds 100, 000, will enable Nublu to develop its range of wireless LAN mesh router devices which allow users wireless access to the internet anywhere within a 300-metre radius.
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Bentley Walker displayed the new Hughes HX260 mesh router at the recent CABSAT event in Dubai and received universally positive responses from public and private sector organizations such as government ministries, banks, and telecommunications companies.
Each Tropos 1410 wireless mesh router and wireless bridge includes an integrated firewall and VPN while enabling field area networks for half the price per connected automation endpoint of competitive solutions
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This solution combines Itron's OpenWay Cell Relay (900 MHz mesh technology) and Tropos' Mesh Router (2.