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Encyclopedia > Wireless mesh network

Wireless mesh networking is mesh networking implemented over a wireless LAN. Image File history File links Download high resolution version (821x1058, 11 KB) Summary Visio Diagram to show a wireless mesh in a city-wide deployment Licensing File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Download high resolution version (821x1058, 11 KB) Summary Visio Diagram to show a wireless mesh in a city-wide deployment Licensing File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image showing mesh network layout Mesh networking is a way to route data, voice and instructions between nodes. ... The notebook is connected to the wireless access point using a PCMCIA wireless card. ...


Whereas the Internet is mostly a wire-based, co-operative electronic communication infrastructure similar to the international postal agreement, in that messages are mutually delivered and relayed within their separate domains free of charge (i.e. if you relay my messages within your domain I'll relay yours within mine), Mesh is a wireless co-operative communication infrastructure between a massive amount of individual wireless transceivers (i.e. a wireless mesh) that have Ethernet type capabilities.


This type of infrastructure can be decentralized (with no central server) or centrally managed (with a central server), both are relatively inexpensive, and very reliable and resilient, as each node need only transmit as far as the next node. Nodes act as repeaters to transmit data from nearby nodes to peers that are too far away to reach, resulting in a network that can span large distances, especially over rough or difficult terrain. Mesh networks are also extremely reliable, as each node is connected to several other nodes. If one node drops out of the network, due to hardware failure or any other reason, its neighbours simply find another route. Extra capacity can be installed by simply adding more nodes. Mesh networks may involve either fixed or mobile devices. The solutions are as diverse as communications in difficult environments such as emergency situations, tunnels and oil rigs to battlefield surveillance and high speed mobile video applications on board public transport or real time racing car telemetry. Network node (NN): A grouping of one or more network elements (at one or more sites) which provides network related functions, and is administered as a single entity. ... A repeater is an electronic device that receives a weak or low-level signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation. ... A peer-to-peer (or P2P) computer network is a network that relies on the computing power and bandwidth of the participants in the network rather than concentrating it in a relatively few servers. ...


The principle is similar to the way packets travel around the wired Internet — data will hop from one device to another until it reaches a given destination. Dynamic routing capabilities included in each device allow this to happen. To implement such dynamic routing capabilities, each device needs to communicate its routing information to every device it connects with, "almost in real time". Each device then determines what to do with the data it receives — either pass it on to the next device or keep it. The routing algorithm used should attempt to always ensure that the data takes the most appropriate (fastest) route to its destination. In information technology, a packet is a formatted block of information carried by a computer network. ... It has been suggested that Routing protocol be merged into this article or section. ... In mathematics, computing, linguistics, and related disciplines, an algorithm is a finite list of well-defined instructions for accomplishing some task that, given an initial state, will terminate in a defined end-state. ...


The choice of radio technology for wireless mesh networks is crucial. In a traditional wireless network where laptops connect to a single access point, each laptop has to share a fixed pool of bandwidth. With mesh technology and adaptive radio, devices in a mesh network will only connect with other devices that are in a set range. The advantage is that, like a natural load balancing system, the more devices the more bandwidth becomes available, provided that the number of hops in the average communications path is kept low. While the term wireless network may technically be used to refer to any type of network that is wireless, the term is most commonly used to refer to a telecommunications network whose interconnections between nodes is implemented without the use of wires, such as a computer network (which is a... An ultraportable IBM X31 with 12 screen on an IBM T43 Thin & Light laptop with a 14 screen A laptop computer, or simply laptop (also notebook computer or notebook), is a small mobile computer, which usually weighs 2. ... A wireless access point (WAP or AP) is a device that connects wireless communication devices together to create a wireless network. ... This article does not cite any references or sources. ...

Contents

Protocols

There are more than 70 competing schemes for routing packets across mesh networks. Some of these include:

  • AODV (Ad-hoc On Demand Distance Vector)
  • B.A.T.M.A.N. (Better Approach To Mobile Adhoc Networking)
  • PWRP (Predictive Wireless Routing Protocol)
  • DSR (Dynamic Source Routing)
  • OLSR (Optimized Link State Routing protocol)
  • TORA (Temporally-Ordered Routing Algorithm)
  • HSLS (Hazy-Sighted Link State)

The IEEE is developing a set of standards under the title 802.11s to define an architecture and protocol for ESS Mesh Networking. The Ad-hoc On-demand Distance Vector (AODV) routing algorithm is an algorithm for routing data across Wireless Mesh Networks. ... B.A.T.M.A.N. is an abbreviation for Better Approach To Mobile Adhoc Networking. ... Dynamic Source Routing (DSR) is a routing protocol for wireless mesh networks. ... The Optimized Link State Routing Protocol (OLSR) is a protocol to connect mobile ad-hoc networks, also sometimes called wireless mesh networks. ... The Temporally-Ordered Routing Algorithm (TORA) is an algorithm for routing data across Wireless Mesh Networks or Mobile ad-hoc networks. ... The Hazy-Sighted Link State Routing Protocol (HSLS) is wireless mesh network protocol. ... The Institute of Electrical and Electronics Engineers or IEEE (pronounced as eye-triple-ee) is an international non-profit, professional organization incorporated in the State of New York, United States. ... 802. ...


A more thorough list can be found at Ad hoc routing protocol list. An Ad hoc routing protocol is a convention or standard that controls how nodes come to agree which way to route packets between computing devices in a mobile ad-hoc network (MANET). ...


See also

Image showing mesh network layout Mesh networking is a way to route data, voice and instructions between nodes. ... Three generations of wireless mesh topologies Wireless Mesh networks allow users to access network ressources by routing data via nearby peers. ... 802. ... Smart Antenna refers to a system of antenna arrays with smart signal processing algorithms that are used to identify the direction of arrival (DOA) of the signal, and use it to calculate beamforming vectors, to track and locate the antenna beam on the mobile/target. ... A mobile ad-hoc network (MANet) is a kind of wireless ad-hoc network, and is a self-configuring network of mobile routers (and associated hosts) connected by wireless links – the union of which form an arbitrary topology. ... A Wireless Distribution System is a system that enables the interconnection of access points wirelessly. ... The notebook is connected to the wireless access point using a PCMCIA wireless card. ... This article or section is in need of attention from an expert on the subject. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... The ant colony optimization algorithm (ACO), introduced by Marco Dorigo [Dor92,DoSt04], is a probabilistic technique for solving computational problems which can be reduced to finding good paths through graphs. ... Ant is a ultra low power mesh networking protocol. ... This article or section does not cite its references or sources. ... (Also known as ‘traditional’ or ‘best effort’ mesh) A shared mesh is a wireless mesh network that uses a single radio to communicate via mesh backhaul links to all the neighboring nodes in the mesh. ... Meraki is a company that produces devices and software for wireless mesh networking. ... The Champaign-Urbana Community Wireless Network (CUWiN) is a special project of the Urbana-Champaign Independent Media Center. ... Roofnet. ... (Also known as ‘high performance’ mesh) A switched mesh is a wireless mesh network that uses multiple radios to communicate via dedicated mesh backhaul links to each neighboring node in the mesh. ... Netsukuku is a mesh network, sort of like P2P, that generates and sustains itself autonomously. ... TinyOS is an open source component-based operating system and platform targeting wireless sensor networks. ... A Public Safety Network is a wireless communications network used by emergency services organizations, such as police, fire and emergency medical services, to prevent or respond to incidents that harm or endanger persons or property. ... The following is a comparison of various wireless data access standards and their performance by several different measures. ... A wireless sensor network (WSN) is a wireless network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants, at different locations. ...

References

  • Ian F. Akyildiz , Xudong Wang , Weilin Wang, "Wireless mesh networks: a survey", Computer Networks and ISDN Systems, v.47 n.4,p.445-487, 15 March 2005

External links

  • Wayflex First mesh based ISP in Brazil.
  • Roofnet.net Mesh network documentation and monitoring for MIT-based roofnet networks
  • Analysis of Mesh Architectures Why all mesh products are not created equal.
  • What is Third Generation Mesh? Review of three generation of mesh networking architectures.
  • Is Multi-radio mesh worthwhile? Cost considerations of multi-radio mesh.
  • Moskaluk Wireless Mesh Don Moskaluk Mesh network documentation and monitoring for Locustworlds Open Source AODV
  • NetEquality A non-profit building mesh networks for low-income neighborhoods
  • IET From hotspots to blankets
  • Remesh Brazilian Mesh Project

  Results from FactBites:
 
Wireless mesh network - Wikipedia, the free encyclopedia (602 words)
Mesh networks are also extremely reliable, as each node is connected to several other nodes.
In a traditional wireless network where laptops connect to a single access point, each laptop has to share a fixed pool of bandwidth.
Since this wireless Internet infrastructure has the potential to be much cheaper than the traditional type, many wireless community network groups are already creating wireless mesh networks.
Mesh networking - Wikipedia, the free encyclopedia (396 words)
Mesh networks are self-healing: the network can still operate even when a node breaks down or a connection goes bad.
A mesh network is a networking technique which allows inexpensive peer network nodes to supply back haul services to other nodes in the same network.
Mesh networks differ from other networks in that the component parts can all connect to each other via multiple hops, and they generally are not mobile.
  More results at FactBites »


 

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