Shulou(Shulou.com)06/02 Report--

This article will explain in detail what mesh networking refers to in the computer network. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Mesh network is a type of wireless local area network, that is, mesh structure network, in Mesh network, all nodes are connected to each other, each node has multiple connection channels, all nodes form a whole network; Mesh network needs to comprehensively consider channel interference, hop selection, frequency selection and other factors.

Mesh network is a type of wireless local area network, that is, mesh network, also known as "multi-hop (multi-hop)" network. In Mesh network, all nodes are connected to each other, each node has multiple connection channels, and all nodes form a whole network. When a certain line is blocked or unresponsive, the wireless Mesh network can choose other lines for data relay according to the situation, any node failure does not affect the access of the network, and the reliability is very high; and when the network failure occurs, it can be repaired automatically to ensure that the WiFi network is high-speed and smooth.

Mesh networking needs to comprehensively consider channel interference, hop selection, frequency selection and other factors. This section will take the 802.11s-based WLAN MESH as an example to analyze the actual possible networking schemes. The following focuses on the analysis of single-frequency networking and dual-frequency networking schemes and performance.

Single-frequency MESH networking

Single-frequency networking scheme is mainly used in areas where equipment and frequency resources are limited, which is divided into single-frequency single-hop and single-frequency multi-hop. In single-frequency networking, the access and return of all wireless access points Mesh AP and wired access points Root AP work in the same frequency band. Taking figure 2 as an example, the channel 802.11b/g on 2.4GHz can be used for access and return. According to the way of product implementation and the different channel interference environment when networking, the channel used between hops may be a completely independent non-interference channel, or it may be a channel with certain interference (the latter is mostly used in the actual environment). At this time, due to the interference between neighboring nodes, all nodes can not receive or send at the same time, so it is necessary to use CSMA/CA 's MAC mechanism to negotiate in the multi-hop range. With the increase of hop count, the bandwidth allocated to each Mesh AP will decrease sharply, and the actual single-frequency network performance will be greatly limited.

Dual-band MESH networking

In the dual-band network, each node uses two different frequency bands for backhaul and access, such as 2.4GHz 802.1l b-band g channel for local access service and 5.8GHz 802.11a channel for backbone Mesh backhaul network, which does not interfere with each other. In this way, each Mesh AP can perform the backhaul forwarding function while serving the local access users. Compared with single-frequency networking, dual-band networking solves the problem of channel interference in return and access, and greatly improves the performance of the network. However, in the actual environment and large-scale networking, due to the use of the same frequency band between the return links, there is still no interference between the channels, so with the increase of the hop count, the bandwidth allocated to each Mesh AP still has a downward trend, and the Mesh AP far away from the Root AP will be at the disadvantage of channel access, so the hop count of dual-frequency network should be carefully set.

This is the end of this article on "what does mesh networking in a computer network mean?". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.