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 mobile sets will automatically connect with the nearest mesh node through WiFi and will eventually enable the workers to communicate and coordinate with other team members.
Each mesh node in this architecture features Ethernet connections as well as power over Ethernet to operate cameras.
The indoor models reportedly feature a compact plenum-rated enclosure with optional brackets for wall, ceiling and office cubicle mounting, and the outdoor models feature a weatherproof enclosure and high gain antennas, and receive power over Ethernet directly from a connected mesh node.
A $1,000 two-radio mesh node is a possibility in 2006, as forward pricing, unit volumes, and large municipal contracts kick in.
Since it was first deployed in July 2009, the Firetide wireless system has grown considerably from the original six mesh node system, to the current 33 mesh node wireless network.
Each mesh node consists of a guyed utility mast, a solar power supply, and a weatherproof outdoor
Ruckus Garnered 41 Percent of the 2010 Worldwide Market for Wi-Fi Mesh Node Shipments to Service Providers in New Dell'Oro Wireless Report
This portable wireless mesh node contains two radios and supports secure connectivity with any Ethernet or 802.
Virtually-On technology to enable mesh nodes to run at low power battery operation for several years -- Active Frequency Hopping for robust operation in highly noisy environments -- Low Latency capability to reduce end-to-end packet delivery time to below seconds within a multi-hop environment, even with a battery operated mesh node -- Highly Scalable Dynamic Addressing to ease installation and commissioning for large and complex networks
Firetide HotPort 7000-900 is a dual-radio mesh node operating in the 900 MHz spectrum on one of the radios, and in the 2.
Test and Correct Installation at Every Step -- During the deployment, the service provider learned that the best location for an access point was not necessarily the best location for a wireless mesh node.
Based on Firetide mesh technology, RD Pole Cam combines a high resolution IP camera and wireless mesh node all packaged in a single compact NEMA rated enclosure.