Networking lecture Wireless AP-wireless relay Mode

In wireless networking, we can simply divide it into two aspects from the user's perspective: home wireless networking and enterprise wireless networking. In enterprise networking, due to the wide network coverage and complicated structure, different Wireless AP network modes will be selected. Next we will introduce the wireless relay mode.

The wireless relay mode, as its name implies, is the function of a Wireless AP in network connection. It can achieve signal relay and amplification, thus extending the coverage of the wireless network) the wireless relay mode enables the Wireless AP to bridge and relay through wireless signals on the WDS without affecting the function of Wireless AP coverage, A new wireless network mode is provided. The wireless relay technology uses the AP's wireless relay function to transmit wireless signals from a relay point to the next relay point, in addition, a new wireless coverage area is formed to form multiple radio relay coverage point relays, which ultimately extend the coverage of the wireless network ｡

Wireless relay Mode

Wireless Distribution System (WDS) creates a link between two AP devices through a radio interface. This link can relay the traffic from an AP that does not have an Ethernet connection to another AP with an Ethernet connection. WDS allows up configure four point-to-point links between access points. Generally, the central AP supports up to four remote wireless relay AP access modes ｡

Although the wireless relay mode makes wireless coverage easier and more flexible, it requires support from high-end APs. If a problem occurs in the central AP, the entire WLAN will be paralyzed and Redundancy cannot be guaranteed, therefore, the "wireless roaming mode" is the most common in applications, and this "relay mode" is used only in special situations where network cabling cannot be performed, it can be used in places with open spaces and difficult to lay ethernet cables, such as large open office areas, warehouses, and docks. There are two networks that are too isolated to transmit network signals, set a relay AP in the middle. This AP only acts as a relay ｡

The diagram of the wireless relay mode is as follows:

 

In this mode, the central AP also needs to provide access services to the client, so select "AP mode", while the AP acting as a repeater does not access the wired network, only power supply, use Repeater and enter "Remote ap mac address ｡

Wireless relay technology is designed for environments with high cabling costs for wired backbone networks, and some APS cannot connect to wired backbone networks due to peripheral environmental factors, the network mode combining wireless relay and wireless coverage can be used to expand the wireless coverage to achieve wireless network roaming. The wireless relay technology is to use the wireless relay function of AP, transmit wireless signals from one relay point to the next relay point, and form a new wireless coverage area, thus forming multiple wireless relay coverage point relay modes, the ultimate goal is to extend the coverage of the wireless network ｡

The networking method of wireless relay mode is widely used. It is widely used in wireless networks. Many places may have large sites or obstacles, however, the coverage of wireless devices cannot reach the distance we need or is blocked in the middle. At this time, we use the wireless relay mode to connect to the wireless network, now many Wireless AP products can bridge the network. In the past, only wireless bridges were used to achieve wireless connections, but the previous wireless bridges only had the bridging function, but cannot achieve infinite coverage ｡

In today's cities, it is easy to connect networks between two buildings and connect them with wireless APs. However, there are many tall buildings in the city, which can easily lead to wireless signal congestion, in this way, the network connection cannot be smoothly realized. At the same time, the network to be connected is too far apart, even if there are no other obstacles in the middle to block the signal transmission and receiving, however, the coverage of today's network technologies and network devices cannot reach this far. In this case, we adopt the relay mode to use the relay AP for signal amplification and continuous transmission ｡

The LAN between buildings needs to be connected to each other. A company wants to connect all the networks of production plants, workshops, and management centers close to each other to facilitate resource sharing and unified management, to maximize the utilization of information, an independent internal LAN in the teaching building, student dormitory, and computing center on a university campus also needs to be established together, it is convenient for students and teachers to access campus networks and the Internet. To connect to various local networks, the wireless distribution system technology can be used. When the distance is too long, the signal is weak, when there are obstacles in the middle, we need to use the wireless relay mode in the wireless distribution system to connect to build a network ｡

When there are obstacles between the two local networks to be connected, you can use wireless relay to bypass the obstacles to complete the wireless bridging between the two points ｡, the position of the wireless relay point should be the same as that of Network A and Network B. The two oriented antennas connected by the relay wireless bridge aim at the directed antennas of Network A and Network B respectively, the communication between wireless bridge A and wireless bridge B is completed by relay the Wireless Bridge ｡