wireless mesh network

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wireless mesh network

(1) A Wi-Fi network that uses multiple units. See Wi-Fi mesh network.

(2) A network that relies on all nodes to propagate signals. Although the wireless signal may start at a 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.







(3) 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 ?
"Qualcomm Technologies is a leader in wireless mesh networks, which are transforming in-home connectivity and opening new avenues for intelligent in-home care," said Nick Kucharewski, vice president and general manager, WIN, Qualcomm Technologies, Inc.
Rajant, a leading provider of mobile wireless mesh networks, has entered into a strategic partnership with Wabtec Corporation that is expected to accelerate the growth of Rajants connectivity solutions in the global rail industry, ushering in the next wave of innovation for passenger and freight systems and bringing new capabilities to the industry.
Wireless mesh networks are ideal for this type of configuration across a mine because of their inherent mobility, flexibility of scale and reliability.
In order to broadband access over Internet and to share network resources by civic and organization consumers, wireless mesh networks (WMNs) delivers a cost effective way that uses multi-hop networking technique[1,2,3].
SmartMesh IP, based on 6L0WPAN, delivers wire-like reliability and ultralow power to wireless mesh networks, allowing secure deployment of battery-operated loT sensors in harsh environments with more than 10 years of battery life.
Joint channel assignment and routing is a well-known problem in multi-radio wireless mesh networks for which optimal configurations is required to optimize the overall throughput and fairness.
While anonymity-related issues have been extensively studied in payment-based systems such as e-cash and peer-to-peer (P2P) systems, little effort has been devoted to wireless mesh networks (WMNs)[6].
Keywords: Android, wireless mesh networks, Wi-Fi Direct, relay
And then they presented improvements of the ETX metric based on link availability for accurately finding high throughput paths in multihop wireless mesh networks. In [18], Pinheiro et al.
Among the topics are a sensor data aggregation system using mobile agents, a semi-supervised and active learning method for alternatives ranking functions, tackling intruders in wireless mesh networks, the smart operating room, and a used products return service based on ambient recommender systems to promote sustainable choices.
[7.] Chunlei Liu, Fangyang Shen, Min-Te Sun, "A Unified TCP Enhancement for Wireless Mesh Networks", 2007 International Conference on Parallel Processing Workshops (ICPPW 2007), 2007.

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