Mesh networking
Mesh networking is a way to route data, voice and instructions between nodes. It allows for continuous connections and reconfiguration around blocked paths by "hopping" from node to node until a connection can be established.
Mesh networks are self-healing: the network can still operate even when a node breaks down or a connection goes bad. As a result, a very reliable network is formed.
Mesh networks use an enormous amount of cable, and can sometimes get messy.
See also
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External links
AirHive Mesh Networking Video: Basic introduction to Mesh Networks Video: Mounting an Outdoors Mesh nodeWireless mesh network (Encyclopedia)
[Wireless mesh network facts from encyclopedia topic]Wireless Mesh Networking is
[For more, click on this link] implemented over a
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Networking infrastructure is therefore decentralised and inexpensive, as each
[Follow this hyperlink for a summary of this subject] need only transmit as far as the next node. Nodes act as
[For more info, click on this link] to transmit data from nearby nodes to
[For more facts about this topic, click this link] that are too far away to reach, resulting in a network that can span a large distance, 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 principle is similar to the way
[For more info, click on this link]s travel around the
[For more info, click on this link] - data will hop from one device to another until it reaches a given destination. Dynamic
[Follow this hyperlink for a summary of this subject] 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
[For more info, click on this link] used should attempt to always ensure that the data takes the most appropriate (fastest) route to its destination.
The choice of
[For more info, click on this link] technology for wireless mesh networks is crucial. In a traditional
[For more facts about this topic, click this link]s connect to a single
[For more, click on this link], the more laptops connected the less
[Follow this hyperlink for a summary of this subject] available for each user. This is because the devices share a fixed bandwidth amount. With mesh technology and adaptive radio, devices in a mesh network will only connect with other devices that are in a set range. Like a natural load balancing system the more devices the more bandwidth available, provided that the number of hops in the average communications path is kept low.
To prevent increased hop count from cancelling out the advantages of multiple transceivers, one common type of architecture for a mobile mesh network includes multiple fixed base stations with "cut through" high-bandwidth terrestrial links that will provide
[Follow this hyperlink for a summary of this subject]s to services, the
[For more info, click on this link] and other fixed base stations. The "cut through" bandwidth of the base station infrastructure must be substantial for the network to operate effectively. However, one feature of wireless mesh networks is that an operator need only deploy a minimal base station infrastructure, and allow the users themselves to extend the network.
Since these networks have the potential to be much cheaper than traditional infrastructure, a number of
Protocols
There are more than 70 competing schemes for routing packets across mesh networks. Some of these include:
[For more info, click on this link] (Temporally-Ordered Routing Algorithm)
[Click link for more facts about this topic] (Ad-hoc On Demand Distance Vector)
[Follow this hyperlink for a summary of this subject] (Optimized Link State Routing protocol)
A more thorough list can be found at
See also
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http://www.absoluteastronomy.com/m/mesh_networking
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