| Generations Of Mesh Networks |
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| wireless networking | |
| network topology | |
| wireless | |
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Wireless Mesh networks allow users to access network ressources by routing data via nearby peers. But earlier-generation Mesh Networking products perform poorly in the very multi-hop (node-to-node connection) environments in which they are being deployed. Here's how third generation products compare with earlier generations of mesh. First Generation One-radio "Ad Hoc" Wireless Mesh. In first-generation mesh products, a single radio provides both service (connection to individual user devices) and Backhaul (links across the mesh to the wired or fiber connection), so wireless congestion and Contention takes place at every node. Users soon discovered that only one or two radio "hops" were possible between connections to the wired or fiber Ethernet. Support is also very poor for Video and Voice applications because of excessive and varying delay ( Latency ) across the network. Second Generation Two-radio Wireless Mesh, shared backhaul. To solve these contention and congestion issues, second-generation mesh was developed by placing two radios in each node, combining an 802.11b/g service radio with an 802.11a backhaul radio.While this offered a performance improvement in terms of Bandwidth over first-generation mesh, problems remain. With heavy user demand, there is still significant contention and congestion on the backhaul links. This limits the number of radio hops before another costly wired or fiber Ethernet connection is needed. Third Generation Three Radio with Multi-radio Wireless Backhaul. Third-generation mesh networking products add at least two physical radios for the backhaul. One backhaul radio is used to create a link to its upstream (nearer the wired source or "root") node. Another backhaul radio creates a link downstream to the next neighbor node. Unlike second-generation solution, these two radios may make use of different channels. This increases the performance of the network in three ways:
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